From 72db81ca76369766a84a1b094858c47c9ec183ec Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 28 Mar 2014 15:20:26 -0600
Subject: Add basic board support framework for the Atmel SAMA5D3 Xplained
 board (not finished)

---
 nuttx/ChangeLog                                    |    9 +-
 nuttx/Documentation/NuttX.html                     |  273 +-
 nuttx/Documentation/README.html                    |    4 +-
 nuttx/README.txt                                   |    2 +
 nuttx/configs/Kconfig                              |   13 +
 nuttx/configs/README.txt                           |    6 +-
 nuttx/configs/sama5d3-xplained/Kconfig             |  165 ++
 nuttx/configs/sama5d3-xplained/README.txt          | 2653 ++++++++++++++++++++
 nuttx/configs/sama5d3-xplained/include/board.h     |  341 +++
 .../sama5d3-xplained/include/board_384mhz.h        |  230 ++
 .../sama5d3-xplained/include/board_396mhz.h        |  221 ++
 .../sama5d3-xplained/include/board_memorymap.h     |   73 +
 nuttx/configs/sama5d3-xplained/norboot/Make.defs   |  146 ++
 nuttx/configs/sama5d3-xplained/norboot/defconfig   |  736 ++++++
 nuttx/configs/sama5d3-xplained/norboot/setenv.sh   |   76 +
 nuttx/configs/sama5d3-xplained/nsh/Make.defs       |  146 ++
 nuttx/configs/sama5d3-xplained/nsh/defconfig       |  834 ++++++
 nuttx/configs/sama5d3-xplained/nsh/setenv.sh       |   76 +
 nuttx/configs/sama5d3-xplained/scripts/ddram.ld    |  123 +
 nuttx/configs/sama5d3-xplained/scripts/isram.ld    |  120 +
 .../configs/sama5d3-xplained/scripts/nor-ddram.ld  |  131 +
 .../configs/sama5d3-xplained/scripts/nor-isram.ld  |  127 +
 nuttx/configs/sama5d3-xplained/scripts/pg-sram.ld  |  158 ++
 nuttx/configs/sama5d3-xplained/src/Makefile        |  188 ++
 nuttx/configs/sama5d3-xplained/src/nor_main.c      |  195 ++
 nuttx/configs/sama5d3-xplained/src/sam_adc.c       |  118 +
 nuttx/configs/sama5d3-xplained/src/sam_at25.c      |  140 ++
 nuttx/configs/sama5d3-xplained/src/sam_autoleds.c  |  173 ++
 nuttx/configs/sama5d3-xplained/src/sam_boot.c      |  150 ++
 nuttx/configs/sama5d3-xplained/src/sam_buttons.c   |  172 ++
 nuttx/configs/sama5d3-xplained/src/sam_can.c       |  140 ++
 .../sama5d3-xplained/src/sam_cxxinitialize.c       |  153 ++
 nuttx/configs/sama5d3-xplained/src/sam_ethernet.c  |  186 ++
 nuttx/configs/sama5d3-xplained/src/sam_hsmci.c     |  344 +++
 nuttx/configs/sama5d3-xplained/src/sam_i2schar.c   |  124 +
 nuttx/configs/sama5d3-xplained/src/sam_nandflash.c |  231 ++
 nuttx/configs/sama5d3-xplained/src/sam_norflash.c  |  145 ++
 nuttx/configs/sama5d3-xplained/src/sam_nsh.c       |  166 ++
 nuttx/configs/sama5d3-xplained/src/sam_ostest.c    |  113 +
 nuttx/configs/sama5d3-xplained/src/sam_pwm.c       |  161 ++
 nuttx/configs/sama5d3-xplained/src/sam_sdram.c     |  578 +++++
 nuttx/configs/sama5d3-xplained/src/sam_spi.c       |  216 ++
 nuttx/configs/sama5d3-xplained/src/sam_usb.c       |  530 ++++
 nuttx/configs/sama5d3-xplained/src/sam_usbmsc.c    |  125 +
 nuttx/configs/sama5d3-xplained/src/sam_userleds.c  |  162 ++
 .../sama5d3-xplained/src/sama5d3-xplained.h        |  676 +++++
 46 files changed, 11718 insertions(+), 131 deletions(-)
 create mode 100644 nuttx/configs/sama5d3-xplained/Kconfig
 create mode 100644 nuttx/configs/sama5d3-xplained/README.txt
 create mode 100644 nuttx/configs/sama5d3-xplained/include/board.h
 create mode 100644 nuttx/configs/sama5d3-xplained/include/board_384mhz.h
 create mode 100644 nuttx/configs/sama5d3-xplained/include/board_396mhz.h
 create mode 100644 nuttx/configs/sama5d3-xplained/include/board_memorymap.h
 create mode 100644 nuttx/configs/sama5d3-xplained/norboot/Make.defs
 create mode 100644 nuttx/configs/sama5d3-xplained/norboot/defconfig
 create mode 100755 nuttx/configs/sama5d3-xplained/norboot/setenv.sh
 create mode 100644 nuttx/configs/sama5d3-xplained/nsh/Make.defs
 create mode 100644 nuttx/configs/sama5d3-xplained/nsh/defconfig
 create mode 100755 nuttx/configs/sama5d3-xplained/nsh/setenv.sh
 create mode 100644 nuttx/configs/sama5d3-xplained/scripts/ddram.ld
 create mode 100644 nuttx/configs/sama5d3-xplained/scripts/isram.ld
 create mode 100644 nuttx/configs/sama5d3-xplained/scripts/nor-ddram.ld
 create mode 100644 nuttx/configs/sama5d3-xplained/scripts/nor-isram.ld
 create mode 100644 nuttx/configs/sama5d3-xplained/scripts/pg-sram.ld
 create mode 100644 nuttx/configs/sama5d3-xplained/src/Makefile
 create mode 100644 nuttx/configs/sama5d3-xplained/src/nor_main.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_adc.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_at25.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_autoleds.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_boot.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_buttons.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_can.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_cxxinitialize.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_ethernet.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_hsmci.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_i2schar.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_nandflash.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_norflash.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_nsh.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_ostest.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_pwm.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_sdram.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_spi.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_usb.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_usbmsc.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sam_userleds.c
 create mode 100644 nuttx/configs/sama5d3-xplained/src/sama5d3-xplained.h

diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 3c529348d..51f69084d 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -7058,4 +7058,11 @@
 	  LCD.  Reported by Toby Duckworth (2014-3-27).
 	* arch/arm/include/sama5/chip.h and arch/arm/src/sama5/Kconfig:  Add
 	  support for the SAMA5D36 (2014-3-28).
-
+	* libc/strings/lib_strncpy.c:  Change ordering of test and copy.  Logic
+	  would have failed if n=0; one byte was always copying before testing
+	  for the end of the copy.
+	* nuttx/configs/sama5d3-xplained/:  Add a board support configuration
+	  for the Atmel SAMA5D3 Xplaiend board.  The initial check in is not
+	  finished. For example, it still builds to run out of NOR FLASH but
+	  the SAMA5D Xlpained has no NOR FLASH (2013-4-28).
+ 
\ No newline at end of file
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index d2563513d..c41fc66bc 100644
--- a/nuttx/Documentation/NuttX.html
+++ b/nuttx/Documentation/NuttX.html
@@ -1217,10 +1217,10 @@
   <li>ARM
     <ul>
       <li><a href="#arm7tdmi">ARM7TDMI</b></a> (5)</li>
-      <li><a href="#arm920t">ARM920T</a> (1) </li>
-      <li><a href="#arm926ejs">ARM926EJS</a> (4) </li>
-      <li><a href="#armcortexa5">ARM Cortex-A5</a> (1) </li>
-      <li><a href="#armcortexa8">ARM Cortex-A8</a> (1) </li>
+      <li><a href="#arm920t">ARM920T</a> (1)</li>
+      <li><a href="#arm926ejs">ARM926EJS</a> (4)</li>
+      <li><a href="#armcortexa5">ARM Cortex-A5</a> (2)</li>
+      <li><a href="#armcortexa8">ARM Cortex-A8</a> (1)</li>
       <li><a href="#armcortexm0">ARM Cortex-M0/M0+</a> (3)</li>
       <li><a href="#armcortexm3">ARM Cortex-M3</a> (25)</li>
       <li><a href="#armcortexm4">ARM Cortex-M4</a> (11)</li>
@@ -1724,141 +1724,160 @@
   <td>
     <p>
       <a name="at91sama5d3"><b>Atmel SAMA5D3</b>.</a>
-        This is the  port of NuttX to the Atmel SAMA5D3<i>x</i>-EK development boards (where <i>x</i>=1,3,4, or 5).
-        These boards feature the Atmel SAMA5D3<i>x</i> microprocessors.
-        Four different SAMA5D3<i>x</i>-EK kits are available
-    </p>
-    <ul>
-      <li>SAMA5D31-EK with the <a href="http://www.atmel.com/devices/sama5d31.aspx">ATSAMA5D31</a></li>
-      <li>SAMA5D33-EK with the <a href="http://www.atmel.com/devices/sama5d33.aspx">ATSAMA5D33</a></li>
-      <li>SAMA5D34-EK with the <a href="http://www.atmel.com/devices/sama5d34.aspx">ATSAMA5D34</a></li>
-      <li>SAMA5D35-EK with the <a href="http://www.atmel.com/devices/sama5d35.aspx">ATSAMA5D35</a></li>
-    </ul>
+      There are ports to two Atmel SAMA5D3 boards:
     <p>
-      The each kit consist of an identical base board with different plug-in modules for each CPU.
-      All four boards are supported by NuttX with a simple reconfiguration of the processor type.
-    </p>
     <ul>
-      <p>
-        <b>STATUS</b>.
-        Initial support for the SAMA5D3x-EK was released in NuttX-6.29.
-        That initial support was minimal:
-        There are simple test configurations that run out of internal SRAM and extended configurations that run out of the on-board NOR FLASH:
-      </p>
-      <ul>
-        <li>
-          A barebones NuttShell (<a href="NuttShell.html">NSH</a>) configuration that can be used as the basis for further application development.
-        </li>
-        <li>
-          A full-loaded NuttShell (<a href="NuttShell.html">NSH</a>) configuration that demonstrates all of the SAMA5D3x features.
-        </li>
-      </ul>
-      <p>
-        The following support was added in Nuttx 6.30:
-      </p>
-      <ul>
-        <li>
-          DMA support, and
-        </li>
-        <li>
-          PIO interrupts,
-        </li>
-      </ul>
-      <p>
-        And drivers for
+      <li><p><b>Atmel SAMA5D3<i>x</i>-EK development boards</b>
+          This is the  port of NuttX to the Atmel SAMA5D3<i>x</i>-EK development boards (where <i>x</i>=1,3,4, or 5).
+          These boards feature the Atmel SAMA5D3<i>x</i> microprocessors.
+          Four different SAMA5D3<i>x</i>-EK kits are available
       </p>
       <ul>
-        <li>
-          SPI (with DMA support),
-        </li>
-        <li>
-          AT25 Serial Flash,
-        </li>
-        <li>
-          Two Wire Interface (TWI), and
-        </li>
-        <li>
-          HSMCI memory cards.
-        </li>
+        <li>SAMA5D31-EK with the <a href="http://www.atmel.com/devices/sama5d31.aspx">ATSAMA5D31</a></li>
+        <li>SAMA5D33-EK with the <a href="http://www.atmel.com/devices/sama5d33.aspx">ATSAMA5D33</a></li>
+        <li>SAMA5D34-EK with the <a href="http://www.atmel.com/devices/sama5d34.aspx">ATSAMA5D34</a></li>
+        <li>SAMA5D35-EK with the <a href="http://www.atmel.com/devices/sama5d35.aspx">ATSAMA5D35</a></li>
       </ul>
       <p>
-        NuttX-6.30 also introduces full USB support:
+        The each kit consist of an identical base board with different plug-in modules for each CPU.
+        All four boards are supported by NuttX with a simple reconfiguration of the processor type.
       </p>
       <ul>
-        <li>
+        <p>
+          <b>STATUS</b>.
+          Initial support for the SAMA5D3x-EK was released in NuttX-6.29.
+          That initial support was minimal:
+          There are simple test configurations that run out of internal SRAM and extended configurations that run out of the on-board NOR FLASH:
+        </p>
+        <ul>
+          <li>
+            A barebones NuttShell (<a href="NuttShell.html">NSH</a>) configuration that can be used as the basis for further application development.
+          </li>
+          <li>
+            A full-loaded NuttShell (<a href="NuttShell.html">NSH</a>) configuration that demonstrates all of the SAMA5D3x features.
+          </li>
+        </ul>
+        <p>
+          The following support was added in Nuttx 6.30:
+        </p>
+        <ul>
+          <li>
+            DMA support, and
+          </li>
+          <li>
+            PIO interrupts,
+          </li>
+        </ul>
+        <p>
+          And drivers for
+        </p>
+        <ul>
+          <li>
+            SPI (with DMA support),
+          </li>
+          <li>
+            AT25 Serial Flash,
+          </li>
+          <li>
+            Two Wire Interface (TWI), and
+          </li>
+          <li>
+            HSMCI memory cards.
+          </li>
+        </ul>
+        <p>
+          NuttX-6.30 also introduces full USB support:
+        </p>
+        <ul>
+          <li>
             High speed device controller driver,
-        </li>
-        <li>
+          </li>
+          <li>
             OHCI (low- and full-speed) and
-        </li>
-        <li>
+          </li>
+          <li>
             EHCI (high-speed) host controller driver support.
-        </li>
-      </ul>
-      <p>
-        With NuttX-6.31, these additional drivers were added:
-      </p>
-      <ul>
-        <li>
-          A 10/100Base-T Ethernet (EMAC) driver,
-        </li>
-        <li>
-          A 1000Base-T Ethernet (GMAC) driver,
-        </li>
-        <li>
-          A Real Time Clock (RTC) driver and integrated with the NuttX system time logic
-        </li>
-        <li>
-          <code>/dev/random</code> using the SAMA5D3x True Random Number Generator (TRNG),
-        </li>
-        <li>
-          A Watchdog Timer (WDT) driver,
-        </li>
-        <li>
-          A Timer/Counter (TC) library with interface that make be used by other drivers that need timer support,
-        </li>
-        <li>
-          An ADC driver that can collect multiple samples using the sequencer, can be trigger by a timer/counter, and supports DMA data transfers,
-        </li>
-        <li>
-          A touchscreen driver based on the special features of the SAMA5D3 ADC peripheral,
-          An LCD controller (LCDC) frame buffer driver, and
-        </li>
-        <li>
-          A CAN driver (Testing of the CAN has been delayed because of cabling issues).
-        </li>
-      </ul>
-      <p>
-        Additional board configurations were added to test and demonstrate these new drivers including new graphics and NxWM configurations.
-      </p>
-      <p>
-        These drivers were added in NuttX-6.32:
-      </p>
-      <ul>
-        <li>
-          A PWM driver with DMA support
-        </li>
-        <li>
-          An SSC-based I2S driver
-        </li>
-        <li>
-          Support for Programmable clock outputs
-        </li>
-        <li>
-          NAND support including support for the PMECC hardware ECC and for DMA transfers.
-        </li>
+          </li>
+        </ul>
+        <p>
+          With NuttX-6.31, these additional drivers were added:
+        </p>
+        <ul>
+          <li>
+            A 10/100Base-T Ethernet (EMAC) driver,
+          </li>
+          <li>
+            A 1000Base-T Ethernet (GMAC) driver,
+          </li>
+          <li>
+            A Real Time Clock (RTC) driver and integrated with the NuttX system time logic
+          </li>
+          <li>
+            <code>/dev/random</code> using the SAMA5D3x True Random Number Generator (TRNG),
+          </li>
+          <li>
+            A Watchdog Timer (WDT) driver,
+          </li>
+          <li>
+            A Timer/Counter (TC) library with interface that make be used by other drivers that need timer support,
+          </li>
+          <li>
+            An ADC driver that can collect multiple samples using the sequencer, can be trigger by a timer/counter, and supports DMA data transfers,
+          </li>
+          <li>
+            A touchscreen driver based on the special features of the SAMA5D3 ADC peripheral,
+            An LCD controller (LCDC) frame buffer driver, and
+          </li>
+          <li>
+            A CAN driver (Testing of the CAN has been delayed because of cabling issues).
+          </li>
+        </ul>
+        <p>
+          Additional board configurations were added to test and demonstrate these new drivers including new graphics and NxWM configurations.
+        </p>
+        <p>
+          These drivers were added in NuttX-6.32:
+        </p>
+        <ul>
+          <li>
+            A PWM driver with DMA support
+          </li>
+          <li>
+            An SSC-based I2S driver
+          </li>
+          <li>
+            Support for Programmable clock outputs
+          </li>
+          <li>
+            NAND support including support for the PMECC hardware ECC and for DMA transfers.
+          </li>
+        </ul>
+        <p>
+          Refer to the NuttX board <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/sama5d3x-ek/README.txt">README</a> file for further information.
+        </p>
+      </li>
+      <li>
+        <p>
+          <b>Atmel SAMA5D3 Xplained development board</b>
+          This is the  port of NuttX to the Atmel SAMA5D3 Xplained development board.
+          The board features the Atmel SAMA5D36 microprocessors.
+          See the <a href="http://www.atmel.com/devices/sama5d36.aspx">Atmel Website</a> for additional information about this board.
+        </p>
+        <p>
+          <b>STATUS</b>.
+          This port is underway as of this writing and not ready for general use.
+          The basic port is expected to be simple because of the similarity to the SAMAD3<i>x</i>-EK boards and should be available in the NuttX 7.2 release.
+        </p>
+        <p>
+          Refer to the NuttX board <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/sama5d3-xplained/README.txt">README</a> file for further information.
+        </p>
       </ul>
-      <p>
-        Develop continues.
-        Work is underway to provide a Image Sensor Interface (ISI) camera interface.
-      </p>
-      <p>
-        Refer to the NuttX board <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/sama5d3x-ek/README.txt">README</a> file for further information.
-      </p>
-      <p>
-        <b>Development Environments:</b>
-        1) Linux with native Linux GNU toolchain, 2) Cygwin/MSYS with Cygwin GNU toolchain, 3) Cygwin/MSYS  with Windows native toolchain, or 4) Native Windows.
-        All testing has been perfomed with the CodeSourcery toolchain (GCC version 4.7.3) in the Cygwin environment under Windows.
+      </li>
+    </ul>
+    <p>
+      <b>Development Environments:</b>
+      1) Linux with native Linux GNU toolchain, 2) Cygwin/MSYS with Cygwin GNU toolchain, 3) Cygwin/MSYS  with Windows native toolchain, or 4) Native Windows.
+      All testing has been perfomed with the CodeSourcery toolchain (GCC version 4.7.3) in the Cygwin environment under Windows.
     </p>
   </td>
 </tr>
diff --git a/nuttx/Documentation/README.html b/nuttx/Documentation/README.html
index e1b0ff183..d1b9e8536 100644
--- a/nuttx/Documentation/README.html
+++ b/nuttx/Documentation/README.html
@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttX README Files</i></font></big></h1>
-      <p>Last Updated: March 10, 2014</p>
+      <p>Last Updated: March 28, 2014</p>
     </td>
   </tr>
 </table>
@@ -163,6 +163,8 @@
  |   |   |   `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/rgmp/README.txt"><b><i>README.txt</i></b></a>
  |   |   |- sama5d3x-ek/
  |   |   |   `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/sama5d3x-ek/README.txt"><b><i>README.txt</i></b></a>
+ |   |   |- sama5d3-xplained/
+ |   |   |   `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/sama5d3-xplained/README.txt"><b><i>README.txt</i></b></a>
  |   |   |- samd20-xplained/
  |   |   |   `- <a href="http://sourceforge.net/p/nuttx/git/ci/master/tree/nuttx/configs/samd20-xplained/README.txt"><b><i>README.txt</i></b></a>
  |   |   |- sam3u-ek/
diff --git a/nuttx/README.txt b/nuttx/README.txt
index e6f686fdd..21f82a141 100644
--- a/nuttx/README.txt
+++ b/nuttx/README.txt
@@ -1027,6 +1027,8 @@ nuttx
  |   |   `- README.txt
  |   |- sama5d3x-ek/
  |   |   `- README.txt
+ |   |- sama5d3-xplained/
+ |   |   `- README.txt
  |   |- samd20-xplained/
  |   |   `- README.txt
  |   |- sam3u-ek/
diff --git a/nuttx/configs/Kconfig b/nuttx/configs/Kconfig
index 121ab0f18..62b0ceafe 100644
--- a/nuttx/configs/Kconfig
+++ b/nuttx/configs/Kconfig
@@ -544,6 +544,15 @@ config ARCH_BOARD_SAMA5D3X_EK
 	---help---
 		The port of NuttX to the Atmel SAMA5D3x-EK development board (where x=1,3,4, or 5).
 
+config ARCH_BOARD_SAMA5D3_XPLAINED
+	bool "Atmel SAMA5D3 Xplained development board"
+	depends on ARCH_CHIP_ATSAMA5D36
+	select ARCH_HAVE_LEDS
+	select ARCH_HAVE_BUTTONS
+	select ARCH_HAVE_IRQBUTTONS
+	---help---
+		The port of NuttX to the Atmel SAMA5D3 Xplained development board.
+
 config ARCH_BOARD_SAMD20_XPLAINED
 	bool "Atmel SAMD20-Xplained Pro development board"
 	depends on ARCH_CHIP_SAMD20J18
@@ -957,6 +966,7 @@ config ARCH_BOARD
 	default "qemu-i486"           if ARCH_BOARD_QEMU_I486
 	default "rgmp"                if ARCH_BOARD_RGMP
 	default "sama5d3x-ek"         if ARCH_BOARD_SAMA5D3X_EK
+	default "sama5d3-xplained"    if ARCH_BOARD_SAMA5D3_XPLAINED
 	default "samd20-xplained"     if ARCH_BOARD_SAMD20_XPLAINED
 	default "sam3u-ek"            if ARCH_BOARD_SAM3UEK
 	default "sam4e-ek"            if ARCH_BOARD_SAM4EEK
@@ -1207,6 +1217,9 @@ endif
 if ARCH_BOARD_SAMA5D3X_EK
 source "configs/sama5d3x-ek/Kconfig"
 endif
+if ARCH_BOARD_SAMA5D3_XPLAINED
+source "configs/sama5d3-xplained/Kconfig"
+endif
 if ARCH_BOARD_SAMD20_XPLAINED
 source "configs/samd20-xplained/Kconfig"
 endif
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index b0499c236..bd94d0f27 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -466,8 +466,10 @@ configs/sama5d3x-ek
   are supported by NuttX with a simple reconfiguration of the processor
   type.
 
-  There is also the SAMA5D3FAE-EK bundle includes everything:  The base
-  board, all four CPU modules, and the LCD.
+configs/sama5d3-xplained
+  This is the  port of NuttX to the Atmel SAMA5D3x-Xplained development board.
+  This board features the Atmel SAMA5D36.  See
+  http://www.atmel.com/devices/sama5d36.aspx.
 
 configs/samd20-xplained
   The port of NuttX to the Atmel SAMD20-Xplained Pro development board.  This
diff --git a/nuttx/configs/sama5d3-xplained/Kconfig b/nuttx/configs/sama5d3-xplained/Kconfig
new file mode 100644
index 000000000..ce6623bd0
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/Kconfig
@@ -0,0 +1,165 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_BOARD_SAMA5D3_XPLAINED
+
+choice
+	prompt "SAMA5D3-Xplained DRAM Type"
+	default SAMA5D3XPLAINED_MT47H128M16RT
+	depends on SAMA5_DDRCS
+
+config SAMA5D3XPLAINED_MT47H128M16RT
+	bool "MT47H128M16RT"
+	---help---
+		Micron 2Gbit x16 DDR2-1066 128Mb
+
+config SAMA5D3XPLAINED_MT47H64M16HR
+	bool "MT47H64M16HR"
+	---help---
+		Micron 1Gbit x16 DDR2-800 64Mb
+
+endchoice # SAMA5D3-Xplained DRAM Type
+
+config SAMA5D3XPLAINED_NOR_MAIN
+	bool "Build nor_main"
+	default n
+	depends on SAMA5_BOOT_ISRAM
+	---help---
+		nor_main is a tiny program that runs in ISRAM.  nor_main will enable
+		NOR flash then either (1) jump to the program in NOR flash or (2)
+		wait for you to break in with GDB to debug the NOR program.
+
+config SAMA5D3XPLAINED_NOR_START
+	bool "Start NOR program"
+	default n
+	depends on SAMA5D3XPLAINED_NOR_MAIN
+	---help---
+		The default behavior of the NOR boot program is to initialize the
+		NOR FLASH at CS0, then patiently wait for you to break into the
+		program with GDB.  An alternative behvior is enabled with this
+		option:  If SAMA5D3XPLAINED_NOR_START is defined, then it will not wait but
+		will, instead, immediately start the program in NOR FLASH.
+
+config SAMA5D3XPLAINED_NAND_AUTOMOUNT
+	bool "NAND FLASH auto-mount"
+	default n
+	depends on NSH_ARCHINIT && SAMA5_EBICS3_NAND
+	---help---
+		Automatically initialize the NAND FLASH driver when NSH starts.
+
+choice
+	prompt "NAND FLASH configuration"
+	default SAMA5D3XPLAINED_NAND_NXFFS
+	depends on SAMA5D3XPLAINED_NAND_AUTOMOUNT
+
+config SAMA5D3XPLAINED_NAND_FTL
+	bool "Create NAND FLASH block driver"
+	depends on MTD && MTD_NAND
+	---help---
+		Create the MTD driver for the NAND and "wrap" the NAND as a standard
+		block driver that could then, for example, be mounted using FAT or
+		any other file system.  Any file system may be used, but there will
+		be no wear-leveling.
+
+		NOTE: This options is not currently recommended.  There is not now
+		NuttX file system that can handle the NAND back blocks or performs
+		wear-leveling other than NXFFS and NXFFS does not use a block driver
+		but, rather, operates directly upon the NAND MTD device.
+
+config SAMA5D3XPLAINED_NAND_NXFFS
+	bool "Create NAND FLASH NXFFS file system"
+	depends on MTD && MTD_NAND && FS_NXFFS && NXFFS_NAND
+	---help---
+		Create the MTD driver for the NAND and mount the NAND device as
+		a wear-leveling, NuttX FLASH file system (NXFFS).  The downside of
+		NXFFS is that it can be very slow.
+
+		NOTE: NXFFS is recommended because (1) it can handle the NAND back
+		blocks and (1) performs wear-leveling.
+
+endchoice # NAND FLASH configuration
+
+config SAMA5D3XPLAINED_AT25_AUTOMOUNT
+	bool "AT25 serial FLASH auto-mount"
+	default n
+	depends on NSH_ARCHINIT && SAMA5_SPI0 && MTD_AT25
+	---help---
+		Automatically initialize the AT25 SPI FLASH driver when NSH starts.
+
+choice
+	prompt "AT25 serial FLASH configuration"
+	default SAMA5D3XPLAINED_AT25_FTL
+	depends on SAMA5D3XPLAINED_AT25_AUTOMOUNT
+
+config SAMA5D3XPLAINED_AT25_FTL
+	bool "Create AT25 Serial FLASH block driver"
+	---help---
+		Create the MTD driver for the AT25 and "wrap" the AT25 as a standard
+		block driver that could then, for example, be mounted using FAT or
+		any other file system.  Any file system may be used, but there will
+		be no wear-leveling.
+
+config SAMA5D3XPLAINED_AT25_NXFFS
+	bool "Create AT25 serial FLASH NXFFS file system"
+	depends on FS_NXFFS
+	---help---
+		Create the MTD driver for the AT25 and mount the AT25 device as
+		a wear-leveling, NuttX FLASH file system (NXFFS).  The downside of
+		NXFFS is that it can be very slow.
+
+endchoice # AT25 serial FLASH configuration
+
+config SAMA5D3XPLAINED_CHANNEL
+	int "PWM channel number"
+	default 0 if SAMA5_PWM_CHAN0
+	default 1 if SAMA5_PWM_CHAN1
+	default 2 if SAMA5_PWM_CHAN2
+	default 3 if SAMA5_PWM_CHAN3
+	range 0 3
+	depends on PWM && SAMA5_PWM
+	---help---
+		Selects the PWM channel number that will be used to perform the PWM
+		test.  See apps/examples/pwm.
+
+if AUDIO_I2SCHAR && (SAMA5_SSC0 || SAMA5_SSC1)
+
+if SAMA5_SSC0 && SAMA5_SSC1
+
+config SAMA5D3XPLAINED_SSC_PORT
+	int "SSC port number"
+	default 0
+	range 0 1
+	---help---
+		Specify the I2S port to use, i.e., 0 for SSC0 or 1 for SSC1
+
+endif # SAMA5_SSC0 && SAMA5_SSC1
+
+if SAMA5_SSC0 && !SAMA5_SSC1
+
+config SAMA5D3XPLAINED_SSC_PORT
+	int
+	default 0
+
+endif # SAMA5_SSC0 && !SAMA5_SSC1
+
+if !SAMA5_SSC0 && SAMA5_SSC1
+
+config SAMA5D3XPLAINED_SSC_PORT
+	int
+	default 1
+
+endif # SAMA5_SSC0 && !SAMA5_SSC1
+
+config SAMA5D3XPLAINED_I2SCHAR_MINOR
+	int "I2S character driver minor number"
+	default 0
+	---help---
+		The minor device number to use when registering the I2S character
+		device.  The driver will be registered at /dev/is2charN where N is
+		the value provided by this setting.
+
+endif # AUDIO_I2SCHAR && (SAMA5_SSC0 || SAMA5_SSC1)
+
+endif # ARCH_BOARD_SAMA5D3_XPLAINED
diff --git a/nuttx/configs/sama5d3-xplained/README.txt b/nuttx/configs/sama5d3-xplained/README.txt
new file mode 100644
index 000000000..bc6cf6df8
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/README.txt
@@ -0,0 +1,2653 @@
+README
+======
+
+  This README file describes the port of NuttX to the SAMA5D3-Xplained
+  development board. This board features the Atmel SAMA5D36 microprocessor.
+  See http://www.atmel.com/devices/sama5d36.aspx for further information.
+
+    PARAMTER                  SAMA5D36
+    ------------------------- -------------
+    Pin Count                 324
+    Max. Operating Frequency  536 MHz
+    CPU                       Cortex-A5
+    Max I/O Pins              160
+    Ext Interrupts            160
+    USB Transceiver           3
+    USB Speed                 Hi-Speed
+    USB Interface             Host, Device
+    SPI                       6
+    TWI (I2C)                 3
+    UART                      7
+    CAN                       2
+    LIN                       4
+    SSC                       2
+    Ethernet                  2
+    SD / eMMC                 3
+    Graphic LCD               Yes
+    Camera Interface          Yes
+    ADC channels              12
+    ADC Resolution (bits)     12
+    ADC Speed (ksps)          1000
+    Resistive Touch Screen    Yes
+    Crypto Engine             AES/DES/
+                              SHA/TRNG
+    SRAM (Kbytes)             128
+    External Bus Interface    1
+    DRAM Memory               DDR2/LPDDR,
+                              SDRAM/LPSDR
+    NAND Interface            Yes
+    Temp. Range (deg C)       -40 to 105
+    I/O Supply Class          1.8/3.3
+    Operating Voltage (Vcc)   1.08 to 1.32
+    FPU                       Yes
+    MPU / MMU                 No/Yes
+    Timers                    6
+    Output Compare channels   6
+    Input Capture Channels    6
+    PWM Channels              4
+    32kHz RTC                 Yes
+    Packages                  LFBGA324_A
+
+Contents
+========
+
+  - Development Environment
+  - GNU Toolchain Options
+  - IDEs
+  - NuttX EABI "buildroot" Toolchain
+  - NXFLAT Toolchain
+  - Loading Code into SRAM with J-Link
+  - Writing to FLASH using SAM-BA
+  - Creating and Using NORBOOT
+  - Buttons and LEDs
+  - Serial Console
+  - Networking
+  - AT25 Serial FLASH
+  - HSMCI Card Slots
+  - USB Ports
+  - USB High-Speed Device
+  - USB High-Speed Host
+  - SDRAM Support
+  - NAND Support
+  - I2C Tool
+  - CAN Usage
+  - SAMA5 ADC Support
+  - SAMA5 PWM Support
+  - RTC
+  - Watchdog Timer
+  - TRNG and /dev/random
+  - I2S Audio Support
+  - SAMA5D3-Xplained Configuration Options
+  - Configurations
+  - To-Do List
+
+Development Environment
+=======================
+
+  Several possible development environments may be use:
+
+  - Linux or OSX native
+  - Cygwin unders Windows
+  - MinGW + MSYS under Windows
+  - Windows native (with GNUMake from GNUWin32).
+
+  All testing has been performed using Cygwin under Windows.
+
+  The source has been built only using the GNU toolchain (see below).  Other
+  toolchains will likely cause problems.
+
+GNU Toolchain Options
+=====================
+
+  The NuttX make system will support the several different toolchain options.
+
+  All testing has been conducted using the CodeSourcery GCC toolchain.  To use
+  a different toolchain, you simply need to add change to one of the following
+  configuration options to your .config (or defconfig) file:
+
+    CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y  : CodeSourcery under Windows
+    CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYL=y  : CodeSourcery under Linux
+    CONFIG_ARMV7A_TOOLCHAIN_ATOLLIC=y        : Atollic toolchain for Windos
+    CONFIG_ARMV7A_TOOLCHAIN_DEVKITARM=y      : devkitARM under Windows
+    CONFIG_ARMV7A_TOOLCHAIN_BUILDROOT=y      : NuttX buildroot under Linux or Cygwin (default)
+    CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIL=y      : Generic GCC ARM EABI toolchain for Linux
+    CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW=y      : Generic GCC ARM EABI toolchain for Windows
+
+  The CodeSourcery GCC toolchain is selected with
+  CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y and setting the PATH variable
+  appropriately.
+
+  NOTE about Windows native toolchains
+  ------------------------------------
+
+  There are several limitations to using a Windows based toolchain in a
+  Cygwin environment.  The three biggest are:
+
+  1. The Windows toolchain cannot follow Cygwin paths.  Path conversions are
+     performed automatically in the Cygwin makefiles using the 'cygpath'
+     utility but you might easily find some new path problems.  If so, check
+     out 'cygpath -w'
+
+  2. Windows toolchains cannot follow Cygwin symbolic links.  Many symbolic
+     links are used in Nuttx (e.g., include/arch).  The make system works
+     around these problems for the Windows tools by copying directories
+     instead of linking them.  But this can also cause some confusion for
+     you:  For example, you may edit a file in a "linked" directory and find
+     that your changes had no effect.  That is because you are building the
+     copy of the file in the "fake" symbolic directory.  If you use a\
+     Windows toolchain, you should get in the habit of making like this:
+
+       make clean_context all
+
+     An alias in your .bashrc file might make that less painful.
+
+  3. Dependencies are not made when using Windows versions of the GCC.  This is
+     because the dependencies are generated using Windows paths which do not
+     work with the Cygwin make.
+
+       MKDEP                = $(TOPDIR)/tools/mknulldeps.sh
+
+IDEs
+====
+
+  NuttX is built using command-line make.  It can be used with an IDE, but some
+  effort will be required to create the project.
+
+  Makefile Build
+  --------------
+  Under Eclipse, it is pretty easy to set up an "empty makefile project" and
+  simply use the NuttX makefile to build the system.  That is almost for free
+  under Linux.  Under Windows, you will need to set up the "Cygwin GCC" empty
+  makefile project in order to work with Windows (Google for "Eclipse Cygwin" -
+  there is a lot of help on the internet).
+
+  Native Build
+  ------------
+  Here are a few tips before you start that effort:
+
+  1) Select the toolchain that you will be using in your .config file
+  2) Start the NuttX build at least one time from the Cygwin command line
+     before trying to create your project.  This is necessary to create
+     certain auto-generated files and directories that will be needed.
+  3) Set up include pathes:  You will need include/, arch/arm/src/sam34,
+     arch/arm/src/common, arch/arm/src/armv7-m, and sched/.
+  4) All assembly files need to have the definition option -D __ASSEMBLY__
+     on the command line.
+
+  Startup files will probably cause you some headaches.  The NuttX startup file
+  is arch/arm/src/sam34/sam_vectors.S.  You may need to build NuttX
+  one time from the Cygwin command line in order to obtain the pre-built
+  startup object needed by an IDE.
+
+NuttX EABI "buildroot" Toolchain
+================================
+
+  A GNU GCC-based toolchain is assumed.  The files */setenv.sh should
+  be modified to point to the correct path to the Cortex-M3 GCC toolchain (if
+  different from the default in your PATH variable).
+
+  If you have no Cortex-M3 toolchain, one can be downloaded from the NuttX
+  SourceForge download site (https://sourceforge.net/projects/nuttx/files/buildroot/).
+  This GNU toolchain builds and executes in the Linux or Cygwin environment.
+
+  1.  You must have already configured Nuttx in <some-dir>/nuttx.
+
+      cd tools
+      ./configure.sh sama5d3-xplained/<sub-dir>
+
+  2.  Download the latest buildroot package into <some-dir>
+
+  3.  unpack the buildroot tarball.  The resulting directory may
+      have versioning information on it like buildroot-x.y.z.  If so,
+      rename <some-dir>/buildroot-x.y.z to <some-dir>/buildroot.
+
+  4.  cd <some-dir>/buildroot
+
+  5.  Copy the configuration file from the configs/ sub-directory to the
+      top-level build directory:
+
+      cp configs/cortexa8-eabi-defconfig-4.8.2 .config
+
+  6a. You may wish to modify the configuration before you build it.  For
+      example, it is recommended that you build the kconfig-frontends tools,
+      generomfs, and the NXFLAT tools as well.  You may also want to change
+      the selected toolchain.  These reconfigurations can all be done with
+
+      make menuconfig
+
+  6b. If you chose to make the configuration with no changes, then you
+      should still do the following to make certain that the build
+      configuration is up-to-date:
+
+      make oldconfig
+
+  7. make
+
+  8. Edit setenv.h, if necessary, so that the PATH variable includes
+     the path to the newly built binaries.
+
+  See the file configs/README.txt in the buildroot source tree.  That has more
+  details PLUS some special instructions that you will need to follow if you are
+  building a Cortex-M3 toolchain for Cygwin under Windows.
+
+NXFLAT Toolchain
+================
+
+  If you are *not* using the NuttX buildroot toolchain and you want to use
+  the NXFLAT tools, then you will still have to build a portion of the buildroot
+  tools -- just the NXFLAT tools.  The buildroot with the NXFLAT tools can
+  be downloaded from the NuttX SourceForge download site
+  (https://sourceforge.net/projects/nuttx/files/).
+
+  This GNU toolchain builds and executes in the Linux or Cygwin environment.
+
+  1. You must have already configured Nuttx in <some-dir>/nuttx.
+
+     cd tools
+     ./configure.sh sama5d3-xplained/<sub-dir>
+
+  2. Download the latest buildroot package into <some-dir>
+
+  3. unpack the buildroot tarball.  The resulting directory may
+     have versioning information on it like buildroot-x.y.z.  If so,
+     rename <some-dir>/buildroot-x.y.z to <some-dir>/buildroot.
+
+  4. cd <some-dir>/buildroot
+
+  5. cp configs/cortexm3-defconfig-nxflat .config
+
+  6. make oldconfig
+
+  7. make
+
+  8. Edit setenv.h, if necessary, so that the PATH variable includes
+     the path to the newly built NXFLAT binaries.
+
+  NOTE:  There are some known incompatibilities with 4.6.3 EABI toolchain
+  and the NXFLAT tools.  See the top-level TODO file (under "Binary
+  loaders") for more information about this problem. If you plan to use
+  NXFLAT, please do not use the GCC 4.6.3 EABI toochain.
+
+Loading Code into SRAM with J-Link
+==================================
+
+  Loading code with the Segger tools and GDB
+  ------------------------------------------
+
+    1) Change directories into the directory where you built NuttX.
+    2) Start the GDB server and wait until it is ready to accept GDB
+       connections.
+    3) Then run GDB like this:
+
+         $ arm-none-eabi-gdb
+         (gdb) target remote localhost:2331
+         (gdb) mon reset
+         (gdb) load nuttx
+         (gdb) ... start debugging ...
+
+  Loading code using J-Link Commander
+  ----------------------------------
+
+    J-Link> r
+    J-Link> loadbin <file> <address>
+    J-Link> setpc <address of __start>
+    J-Link> ... start debugging ...
+
+Writing to FLASH using SAM-BA
+=============================
+
+  Assumed starting configuration:
+
+    1. You have installed the J-Link CDC USB driver (Windows only, there is
+        no need to install a driver on any regular Linux distribution),
+    2. You have the USB connected to DBGU port (J23)
+    3. Terminal configuration:  115200 8N1
+
+  Using SAM-BA to write to FLASH:
+
+    1. Exit the terminal emulation program and remove the USB cable from
+       the DBGU port (J23)
+    2. Connect the USB cable to the device USB port (J6)
+    3. JP9 must open (BMS == 1) to boot from on-chip Boot ROM.
+    4. Press and maintain PB4 CS_BOOT button and power up the board.  PB4
+       CS_BOOT button prevents booting from Nand or serial Flash by
+       disabling Flash Chip Selects after having powered the board, you can
+       release the PB4 BS_BOOT button.
+    5. On Windows you may need to wait for a device driver to be installed.
+    6. Start the SAM-BA application, selecting (1) the correct USB serial
+       port, and (2) board = at91sama5d3-xplained.
+    7. The SAM-BA menu should appear.
+    8. Select the FLASH bank that you want to use and the address to write
+       to and "Execute"
+    9. When you are finished writing to FLASH, remove the USB cable from J6
+       and re-connect the serial link on USB CDC / DBGU connector (J23) and
+       re-open the terminal emulator program.
+    10. Power cycle the board.
+
+Creating and Using NORBOOT
+==========================
+
+  In order to have more control of debugging code that runs out of NOR FLASH,
+  I created the sama5d3-xplained/norboot configuration.  That configuration is
+  described below under "Configurations."
+
+  Here are some general instructions on how to build an use norboot:
+
+  Building:
+  1. Remove any old configurations (if applicable).
+
+       cd <nuttx>
+       make distclean
+
+  2. Install and build the norboot configuration.  This steps will establish
+     the norboot configuration and setup the PATH variable in order to do
+     the build:
+
+       cd tools
+       ./configure.sh sama5d3-xplained/<subdir>
+       cd -
+       . ./setenv.sh
+
+     Before sourcing the setenv.sh file above, you should examine it and
+     perform edits as necessary so that TOOLCHAIN_BIN is the correct path
+     to the directory than holds your toolchain binaries.
+
+     NOTE:  Be aware that the default norboot also disables the watchdog.
+     Since you will not be able to re-enable the watchdog later, you may
+     need to set CONFIG_SAMA5_WDT=y in the NuttX configuration file.
+
+     Then make norboot:
+
+       make
+
+     This will result in an ELF binary called 'nuttx' and also HEX and
+     binary versions called 'nuttx.hex' and 'nuttx.bin'.
+
+  3. Rename the binaries.  Since you will need two versions of NuttX:  this
+     norboot version that runs in internal SRAM and another under test in
+     NOR FLASH, I rename the resulting binary files so that they can be
+     distinguished:
+
+       mv nuttx norboot
+       mv nuttx.hex norboot.hex
+       mv nuttx.bin norboot.bin
+
+  4. Build your NOR configuration and write this into NOR FLASH.  Here, for
+     example, is how you would create the NSH NOR configuration:
+
+       cd <nuttx>
+       make distclean                 # Remove the norboot configuration
+       cd tools
+       ./configure.sh sama5d3-xplained/nsh # Establish the NSH configuration
+       cd -
+       make                           # Build the NSH configuration
+
+     Then use SAM-BA to write the nuttx.bin binary into NOR FLASH.  This
+     will involve holding the CS_BOOT button and power cycling to start
+     the ROM loader.  The SAM-BA serial connection will be on the device
+     USB port, not the debug USB port.  Follow the SAM-BA instruction to
+     write the nuttx.bin binary to NOR FLASH.
+
+   5. Restart the system without holding CS_BOOT to get back to the normal
+      debug setup.
+
+   6. Then start the J-Link GDB server and GDB.  In GDB, I do the following:
+
+       (gdb) mon reset                # Reset and halt the CPU
+       (gdb) load norboot             # Load norboot into internal SRAM
+       (gdb) mon go                   # Start norboot
+       (gdb) mon halt                 # Break in
+       (gdb) mon reg pc = 0x10000040  # Set the PC to NOR flash entry point
+       (gdb) mon go                   # And jump into NOR flash
+
+      The norboot program can also be configured to jump directly into
+      NOR FLASH without requiring the final halt and go by setting
+      CONFIG_SAMA5D3XPLAINED_NOR_START=y in the NuttX configuration.  However,
+      since I have been debugging the early boot sequence, the above
+      sequence has been most convenient for me since it allows me to
+      step into the program in NOR.
+
+   7. An option is to use the SAM-BA tool to write the NORBOOT image into
+      Serial FLASH.  Then, the system will boot from Serial FLASH by
+      copying the NORBOOT image in SRAM which will run and then start the
+      image in NOR FLASH automatically.  This is a very convenient usage!
+
+      NOTES: (1) There is jumper on the CM module that must be closed to
+      enable use of the AT25 Serial Flash.  (2) If using SAM-BA, make sure
+      that you load the NOR boot program into the boot area via the pull-
+      down menu.
+
+    STATUS:
+      2014-7-30:  I have been unable to execute these configurations from NOR
+        FLASH by closing the BMS jumper (J9).  As far as I can tell, this
+        jumper does nothing on my board???  So I have been using the norboot
+        configuration exclusively to start the program-under-test in NOR FLASH.
+
+Buttons and LEDs
+================
+
+  Buttons
+  -------
+
+  The following push buttons switches are available:
+
+    1. One board reset button (BP2). When pressed and released, this push
+       button causes a power-on reset of the whole board.
+
+    2. One wakeup pushbutton that brings the processor out of Low-power mode
+       (BP1)
+
+    3. One user pushbutton (BP3)
+
+  Only the user push button (BP3) is controllable by software:
+
+    - PE29.  Pressing the switch connect PE29 to ground.  Therefore, PE29
+      must be pulled high internally.  When the button is pressed the SAMA5
+      will sense "0" is on PE29.
+
+  LEDs
+  ----
+  There are two LEDs on the SAMA5D3 series-CM board that can be controlled
+  by software.  A  blue LED is controlled via PIO pins.  A red LED normally
+  provides an indication that power is supplied to the board but can also
+  be controlled via software.
+
+    PE23.  This blue LED is pulled high and is illuminated by pulling PE23
+    low.
+
+    PE24.  The red LED is also pulled high but is driven by a transistor so
+    that it is illuminated when power is applied even if PE24 is not
+    configured as an output.
+
+  These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
+  defined.  In that case, the usage by the board port is defined in
+  include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related
+  events as follows:
+
+    SYMBOL                Meaning                     LED state
+                                                    Blue     Red
+    -------------------  -----------------------  -------- --------
+    LED_STARTED          NuttX has been started     OFF      OFF
+    LED_HEAPALLOCATE     Heap has been allocated    OFF      OFF
+    LED_IRQSENABLED      Interrupts enabled         OFF      OFF
+    LED_STACKCREATED     Idle stack created         ON       OFF
+    LED_INIRQ            In an interrupt              No change
+    LED_SIGNAL           In a signal handler          No change
+    LED_ASSERTION        An assertion failed          No change
+    LED_PANIC            The system has crashed     OFF      Blinking
+    LED_IDLE             MCU is is sleep mode         Not used
+
+  Thus if the blue LED is statically on, NuttX has successfully booted and
+  is, apparently, running normally.  If the red is flashing at
+  approximately 2Hz, then a fatal error has been detected and the system
+  has halted.
+
+Serial Console
+==============
+
+  UARTS/USARTS
+  ------------
+
+    CONN  LABEL   PIO   UART/USART  FUNCTION
+    ----- ------- ----- ----------- ---------------
+    J18   SCL0    PC30  UART0       UTXD0
+    J18   SDA0    PC29  UART0       URXD0
+    J15   1       PA31  UART1       UTXD1
+    J15   0       PA30  UART1       URXD1
+    J20   TXD3 14 PC26  UART1       URXD1
+    J20   RXD3 15 PC27  UART1       UTXD1
+    J20   TXD1 16 PD18  USART0      TXD0
+    J20   RXD1 17 PD17  USART0      RXD0
+    J20   TXD0 18 PB29  USART1      TXD1
+    J20   RXD0 19 PB28  USART1      RXD1
+    J20   SDA  20 PE19  USART3      TXD3
+    J20   SCL  21 PE18  USART3      RXD3
+
+  By default USART1 is used as the NuttX serial console in all
+  configurations (unless otherwise noted).  USART1 is provided at TTL
+  levels at pins TXD0 and TXD1 or J20.
+
+    USART1 Connector J8
+
+  DBGU Interface
+  --------------
+
+  The SAMA5D3 Xplained board has a dedicated serial port for debugging,
+  which is accessible through the 6-pin male header J23.
+
+  PIN PIO  Usage
+  --- ---- -----------------------------------------
+   1  PE13 (available)
+   2  PB31 DBGU DTXD
+   3  PB30 DBGU DRXD
+   4  N/C  (may be used by debug interface tool)
+   5  PE14 (available)
+   6  GND
+
+  The DBGU is not used by NuttX.
+
+Networking
+==========
+
+  Networking support via the can be added to NSH by selecting the following
+  configuration options.  The SAMA5D36 supports two different Ethernet MAC
+  peripherals:  (1) The 10/100Base-T EMAC peripheral and (2) the
+  10/100/1000Base-T GMAC peripheral.
+
+  Selecting the EMAC peripheral
+  -----------------------------
+
+  System Type -> SAMA5 Peripheral Support
+    CONFIG_SAMA5_EMAC=y                 : Enable the EMAC peripheral
+
+  System Type -> EMAC device driver options
+    CONFIG_SAMA5_EMAC_NRXBUFFERS=16     : Set aside some RS and TX buffers
+    CONFIG_SAMA5_EMAC_NTXBUFFERS=4
+    CONFIG_SAMA5_EMAC_PHYADDR=1         : KSZ9031 PHY is at address 1
+    CONFIG_SAMA5_EMAC_AUTONEG=y         : Use autonegotiation
+    CONFIG_SAMA5_EMAC_RMII=y            : Either MII or RMII interface should work
+    CONFIG_SAMA5_EMAC_PHYSR=30          : Address of PHY status register on KSZ9031
+    CONFIG_SAMA5_EMAC_PHYSR_ALTCONFIG=y : Needed for KSZ9031
+    CONFIG_SAMA5_EMAC_PHYSR_ALTMODE=0x7 : "    " " " "     "
+    CONFIG_SAMA5_EMAC_PHYSR_10HD=0x1    : "    " " " "     "
+    CONFIG_SAMA5_EMAC_PHYSR_100HD=0x2   : "    " " " "     "
+    CONFIG_SAMA5_EMAC_PHYSR_10FD=0x5    : "    " " " "     "
+    CONFIG_SAMA5_EMAC_PHYSR_100FD=0x6   : "    " " " "     "
+
+  PHY selection.  Later in the configuration steps, you will need to select
+  the KSZ9031 PHY for EMAC (See below)
+
+  Selecting the GMAC peripheral
+  -----------------------------
+
+  System Type -> SAMA5 Peripheral Support
+    CONFIG_SAMA5_GMAC=y                 : Enable the GMAC peripheral
+
+  System Type -> GMAC device driver options
+    CONFIG_SAMA5_GMAC_NRXBUFFERS=16     : Set aside some RS and TX buffers
+    CONFIG_SAMA5_GMAC_NTXBUFFERS=4
+    CONFIG_SAMA5_GMAC_PHYADDR=1         : KSZ8081 PHY is at address 1
+    CONFIG_SAMA5_GMAC_AUTONEG=y         : Use autonegotiation
+
+  If both EMAC and GMAC are selected, you will also need:
+
+    CONFIG_SAMA5_GMAC_ISETH0=y          : GMAC is "eth0"; EMAC is "eth1"
+
+  PHY selection.  Later in the configuration steps, you will need to select
+  the  KSZ9081 PHY for GMAC (See below)
+
+  Common configuration settings
+  -----------------------------
+
+  Networking Support
+    CONFIG_NET=y                        : Enable Neworking
+    CONFIG_NET_SOCKOPTS=y               : Enable socket operations
+    CONFIG_NET_BUFSIZE=562              : Maximum packet size (MTD) 1518 is more standard
+    CONFIG_NET_RECEIVE_WINDOW=562       : Should be the same as CONFIG_NET_BUFSIZE
+    CONFIG_NET_TCP=y                    : Enable TCP/IP networking
+    CONFIG_NET_TCPBACKLOG=y             : Support TCP/IP backlog
+    CONFIG_NET_TCP_READAHEAD_BUFSIZE=562  Read-ahead buffer size
+    CONFIG_NET_UDP=y                    : Enable UDP networking
+    CONFIG_NET_ICMP=y                   : Enable ICMP networking
+    CONFIG_NET_ICMP_PING=y              : Needed for NSH ping command
+                                        : Defaults should be okay for other options
+  Device drivers -> Network Device/PHY Support
+    CONFIG_NETDEVICES=y                 : Enabled PHY selection
+    CONFIG_ETH0_PHY_KSZ8081=y           : Select the KSZ8081 PHY (for EMAC), OR
+    CONFIG_ETH0_PHY_KSZ90x1=y           : Select the KSZ9031 PHY (for GMAC)
+
+  Application Configuration -> Network Utilities
+    CONFIG_NETUTILS_RESOLV=y            : Enable host address resolution
+    CONFIG_NETUTILS_TELNETD=y           : Enable the Telnet daemon
+    CONFIG_NETUTILS_TFTPC=y             : Enable TFTP data file transfers for get and put commands
+    CONFIG_NETUTILS_UIPLIB=y            : Network library support is needed
+    CONFIG_NETUTILS_WEBCLIENT=y         : Needed for wget support
+                                        : Defaults should be okay for other options
+  Application Configuration -> NSH Library
+    CONFIG_NSH_TELNET=y                 : Enable NSH session via Telnet
+    CONFIG_NSH_IPADDR=0x0a000002        : Select an IP address
+    CONFIG_NSH_DRIPADDR=0x0a000001      : IP address of gateway/host PC
+    CONFIG_NSH_NETMASK=0xffffff00       : Netmask
+    CONFIG_NSH_NOMAC=y                  : Need to make up a bogus MAC address
+                                        : Defaults should be okay for other options
+
+  Using the network with NSH
+  --------------------------
+
+  So what can you do with this networking support?  First you see that
+  NSH has several new network related commands:
+
+    ifconfig, ifdown, ifup:  Commands to help manage your network
+    get and put:             TFTP file transfers
+    wget:                    HTML file transfers
+    ping:                    Check for access to peers on the network
+    Telnet console:          You can access the NSH remotely via telnet.
+
+  You can also enable other add on features like full FTP or a Web
+  Server or XML RPC and others.  There are also other features that
+  you can enable like DHCP client (or server) or network name
+  resolution.
+
+  By default, the IP address of the SAMA5D3-Xplained will be 10.0.0.2 and
+  it will assume that your host is the gateway and has the IP address
+  10.0.0.1.
+
+    nsh> ifconfig
+    eth0    HWaddr 00:e0:de:ad:be:ef at UP
+            IPaddr:10.0.0.2 DRaddr:10.0.0.1 Mask:255.255.255.0
+
+  You can use ping to test for connectivity to the host (Careful,
+  Window firewalls usually block ping-related ICMP traffic).  On the
+  target side, you can:
+
+    nsh> ping 10.0.0.1
+    PING 10.0.0.1 56 bytes of data
+    56 bytes from 10.0.0.1: icmp_seq=1 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=2 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=3 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=4 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=5 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=6 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=7 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=8 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=9 time=0 ms
+    56 bytes from 10.0.0.1: icmp_seq=10 time=0 ms
+    10 packets transmitted, 10 received, 0% packet loss, time 10100 ms
+
+  NOTE: In this configuration is is normal to have packet loss > 0%
+  the first time you ping due to the default handling of the ARP
+  table.
+
+  On the host side, you should also be able to ping the SAMA5D3-Xplained:
+
+    $ ping 10.0.0.2
+
+  You can also log into the NSH from the host PC like this:
+
+    $ telnet 10.0.0.2
+    Trying 10.0.0.2...
+    Connected to 10.0.0.2.
+    Escape character is '^]'.
+    sh_telnetmain: Session [3] Started
+
+    NuttShell (NSH) NuttX-6.31
+    nsh> help
+    help usage:  help [-v] [<cmd>]
+
+      [           echo        ifconfig    mkdir       mw          sleep
+      ?           exec        ifdown      mkfatfs     ping        test
+      cat         exit        ifup        mkfifo      ps          umount
+      cp          free        kill        mkrd        put         usleep
+      cmp         get         losetup     mh          rm          wget
+      dd          help        ls          mount       rmdir       xd
+      df          hexdump     mb          mv          sh
+
+    Builtin Apps:
+    nsh>
+
+  NOTE:  If you enable this feature, you experience a delay on booting.
+  That is because the start-up logic waits for the network connection
+  to be established before starting NuttX.  In a real application, you
+  would probably want to do the network bringup on a separate thread
+  so that access to the NSH prompt is not delayed.
+
+  This delay will be especially long if the board is not connected to
+  a network.
+
+AT25 Serial FLASH
+=================
+
+  Connections
+  -----------
+
+  Both the SAMA5D3-Xplained board supports an options Serial DataFlash.  The
+  SPI connection is as follows:
+
+    AT25DF321A      SAMA5
+    --------------- -----------------------------------------------
+    SI              PD11 SPI0_MOSI
+    SO              PD10 SPI0_MIS0
+    SCK             PD12 SPI0_SPCK
+    /CS             PD13 if jumper JP6 is closed.
+
+  Configuration
+  -------------
+
+    System Type -> SAMA5 Peripheral Support
+      CONFIG_SAMA5_SPI0=y                   : Enable SPI0
+      CONFIG_SAMA5_DMAC0=y                  : Enable DMA controller 0
+
+    System Type -> SPI device driver options
+      CONFIG_SAMA5_SPI_DMA=y                : Use DMA for SPI transfers
+      CONFIG_SAMA5_SPI_DMATHRESHOLD=4       : Don't DMA for small transfers
+
+    Device Drivers -> SPI Driver Support
+      CONFIG_SPI=y                          : Enable SPI support
+      CONFIG_SPI_EXCHANGE=y                 : Support the exchange method
+
+    Device Drivers -> Memory Technology Device (MTD) Support
+      CONFIG_MTD=y                          : Enable MTD support
+      CONFIG_MTD_AT25=y                     : Enable the AT25 driver
+      CONFIG_AT25_SPIMODE=0                 : Use SPI mode 0
+      CONFIG_AT25_SPIFREQUENCY=10000000     : Use SPI frequency 10MHz
+
+  The AT25 is capable of higher SPI rates than this.  I have not experimented
+  a lot, but at 20MHz, the behavior is not the same with all CM modules.  This
+  lower rate gives more predictable performance.
+
+    Application Configuration -> NSH Library
+      CONFIG_NSH_ARCHINIT=y                 : NSH board-initialization
+
+    Board Selection
+      CONFIG_SAMA5D3XPLAINED_AT25_AUTOMOUNT=y         : Mounts AT25 for NSH
+      CONFIG_SAMA5D3XPLAINED_AT25_FTL=y               : Create block driver for FAT
+
+  NOTE that you must close JP6 in order to enable the AT25 FLASH chip select.
+
+  You can then format the AT25 FLASH for a FAT file system and mount the
+  file system at /mnt/at25 using these NSH commands:
+
+    nsh> mkfatfs /dev/mtdblock0
+    nsh> mount -t vfat /dev/mtdblock0 /mnt/at25
+
+  Then you an use the FLASH as a normal FAT file system:
+
+    nsh> echo "This is a test" >/mnt/at25/atest.txt
+    nsh> ls -l /mnt/at25
+    /mnt/at25:
+     -rw-rw-rw-      16 atest.txt
+    nsh> cat /mnt/at25/atest.txt
+    This is a test
+
+  NOTE:  It appears that if Linux runs out of NAND, it will destroy the
+  contents of the AT25.
+
+HSMCI Card Slots
+================
+
+  Physical Slots
+  --------------
+
+  The SAMA5D3-Xplained provides a two SD memory card slots:  (1) a full size SD
+  card slot (J10), and (2) a microSD memory card slot (J11).
+
+  The full size SD card slot connects via HSMCI0.  The card detect discrete
+  is available on PD17 (pulled high).  The write protect discrete is tied to
+  ground and not i savailable to software.  The slot supports 8-bit wide
+  transfer mode, but the NuttX driver currently uses only the 4-bit wide
+  transfer mode
+
+    PD17 MCI0_CD
+    PD1  MCI0_DA0
+    PD2  MCI0_DA1
+    PD3  MCI0_DA2
+    PD4  MCI0_DA3
+    PD5  MCI0_DA4
+    PD6  MCI0_DA5
+    PD7  MCI0_DA6
+    PD8  MCI0_DA7
+    PD9  MCI0_CK
+    PD0  MCI0_CDA
+
+    PE2  PWR_MCI0
+
+  The microSD connects vi HSMCI1.  The card detect discrete is available on
+  PD18 (pulled high):
+
+    PD18  MCI1_CD
+    PB20  MCI1_DA0
+    PB21  MCI1_DA1
+    PB22  MCI1_DA2
+    PB23  MCI1_DA3
+    PB24  MCI1_CK
+    PB19  MCI1_CDA
+
+  Configuration Settings
+  ----------------------
+
+  Enabling HSMCI support. The SAMA5D3-Xplained provides a two SD memory card
+  slots:  (1) a full size SD card slot (J10), and (2) a microSD memory card
+  slot (J11).  The full size SD card slot connects via HSMCI0; the microSD
+  connects via HSMCI1.  Support for both SD slots can be enabled with the
+  following settings:
+
+    System Type->ATSAMA5 Peripheral Support
+      CONFIG_SAMA5_HSMCI0=y                 : Enable HSMCI0 support
+      CONFIG_SAMA5_HSMCI1=y                 : Enable HSMCI1 support
+      CONFIG_SAMA5_DMAC0=y                  : DMAC0 is needed by HSMCI0
+      CONFIG_SAMA5_DMAC1=y                  : DMAC1 is needed by HSMCI1
+
+    System Type
+      CONFIG_SAMA5_PIO_IRQ=y                : PIO interrupts needed
+      CONFIG_SAMA5_PIOD_IRQ=y               : Card detect pins are on PIOD
+
+    Device Drivers -> MMC/SD Driver Support
+      CONFIG_MMCSD=y                        : Enable MMC/SD support
+      CONFIG_MMSCD_NSLOTS=1                 : One slot per driver instance
+      CONFIG_MMCSD_HAVECARDDETECT=y         : Supports card-detect PIOs
+      CONFIG_MMCSD_MMCSUPPORT=n             : Interferes with some SD cards
+      CONFIG_MMCSD_SPI=n                    : No SPI-based MMC/SD support
+      CONFIG_MMCSD_SDIO=y                   : SDIO-based MMC/SD support
+      CONFIG_SDIO_DMA=y                     : Use SDIO DMA
+      CONFIG_SDIO_BLOCKSETUP=y              : Needs to know block sizes
+
+    Library Routines
+      CONFIG_SCHED_WORKQUEUE=y              : Driver needs work queue support
+
+    Application Configuration -> NSH Library
+      CONFIG_NSH_ARCHINIT=y                 : NSH board-initialization
+
+    Using the SD card
+    -----------------
+
+    1) After booting, the HSCMI devices will appear as /dev/mmcsd0
+       and /dev/mmcsd1.
+
+    2) If you try mounting an SD card with nothing in the slot, the
+       mount will fail:
+
+         nsh> mount -t vfat /dev/mmcsd1 /mnt/sd1
+         nsh: mount: mount failed: 19
+
+       NSH can be configured to provide errors as strings instead of
+       numbers.  But in this case, only the error number is reported.  The
+       error numbers can be found in nuttx/include/errno.h:
+
+         #define ENODEV              19
+         #define ENODEV_STR          "No such device"
+
+       So the mount command is saying that there is no device or, more
+       correctly, that there is no card in the SD card slot.
+
+    3) Inserted the SD card.  Then the mount should succeed.
+
+        nsh> mount -t vfat /dev/mmcsd1 /mnt/sd1
+        nsh> ls /mnt/sd1
+        /mnt/sd1:
+         atest.txt
+        nsh> cat /mnt/sd1/atest.txt
+        This is a test
+
+    4) Before removing the card, you must umount the file system.  This is
+       equivalent to "ejecting" or "safely removing" the card on Windows:  It
+       flushes any cached data to the card and makes the SD card unavailable
+       to the applications.
+
+         nsh> umount -t /mnt/sd1
+
+       It is now safe to remove the card.  NuttX provides into callbacks
+       that can be used by an application to automatically unmount the
+       volume when it is removed.  But those callbacks are not used in
+       these configurations.
+
+USB Ports
+=========
+
+  The SAMA5D3-Xplained features three USB communication ports:
+
+    * Port A Host High Speed (EHCI) and Full Speed (OHCI) multiplexed with
+      USB Device High Speed Micro AB connector, J6
+
+    * Port B Host High Speed (EHCI) and Full Speed (OHCI) standard type A
+      connector, J7 upper port
+
+    * Port C Host Full Speed (OHCI) only standard type A connector, J7
+      lower port
+
+  The two USB host ports (only) are equipped with 500-mA high-side power
+  switch for self-powered and bus-powered applications.
+
+  The USB device port A (J6) features a VBUS insert detection function.
+
+  Port A
+  ------
+
+    PIO  Signal Name Function
+    ---- ----------- -------------------------------------------------------
+    PE9  VBUS_SENSE VBus detection
+
+    Note: No VBus power switch enable on port A.  I think that this limits
+    this port to a device port or as a host port for self-powered devices
+    only.
+
+  Port B
+  ------
+
+    PIO  Signal Name Function
+    ---- ----------- -------------------------------------------------------
+    PE4  EN5V_USBB   VBus power enable (via MN3 power switch).  To the A1
+                     pin of J7 Dual USB A connector
+
+  Port C
+  ------
+
+    PIO  Signal Name Function
+    ---- ----------- -------------------------------------------------------
+    PE3  EN5V_USBC   VBus power enable (via MN3 power switch).  To the B1
+                     pin of J7 Dual USB A connector
+
+  Both Ports B and C
+  ------------------
+
+    PIO  Signal Name Function
+    ---- ----------- -------------------------------------------------------
+    PE5  OVCUR_USB   Combined over-current indication from port A and B
+
+USB High-Speed Device
+=====================
+
+  Basic USB High-Speed Device Configuration
+  -----------------------------------------
+
+  Support the USB high-speed device (UDPHS) driver can be enabled with these
+  NuttX configuration settings.
+
+    Device Drivers -> USB Device Driver Support
+      CONFIG_USBDEV=y                       : Enable USB device support
+      CONFIG_USBDEV_DUALSPEED=y             : Device support High and Full Speed
+      CONFIG_USBDEV_DMA=y                   : Device uses DMA
+
+    System Type -> ATSAMA5 Peripheral Support
+      CONFIG_SAMA5_UDPHS=y                  : Enable UDPHS High Speed USB device
+
+    Application Configuration -> NSH Library
+      CONFIG_NSH_ARCHINIT=y                 : NSH board-initialization
+
+  Mass Storage Class
+  ------------------
+
+  The Mass Storage Class (MSC) class driver is selected for use with
+  UDPHS:
+
+    Device Drivers -> USB Device Driver Support
+      CONFIG_USBMSC=y                       : Enable the USB MSC class driver
+      CONFIG_USBMSC_EPBULKOUT=1             : Use EP1 for the BULK OUT endpoint
+      CONFIG_USBMSC_EPBULKIN=2              : Use EP2 for the BULK IN endpoint
+
+  The following setting enables an add-on that can can be used to control
+  the USB MSC device.  It will add two new NSH commands:
+
+    a. msconn will connect the USB serial device and export the AT25
+       to the host, and
+    b. msdis which will disconnect the USB serial device.
+
+    Application Configuration -> System Add-Ons:
+      CONFIG_SYSTEM_USBMSC=y                : Enable the USBMSC add-on
+      CONFIG_SYSTEM_USBMSC_NLUNS=1          : One LUN
+      CONFIG_SYSTEM_USBMSC_DEVMINOR1=0      : Minor device zero
+      CONFIG_SYSTEM_USBMSC_DEVPATH1="/dev/mtdblock0"
+                                            : Use a single, LUN:  The AT25
+                                            : block driver.
+
+    NOTES:
+
+    a. To prevent file system corruption, make sure that the AT25 is un-
+       mounted *before* exporting the mass storage device to the host:
+
+         nsh> umount /mnt/at25
+         nsh> mscon
+
+       The AT25 can be re-mounted after the mass storage class is disconnected:
+
+        nsh> msdis
+        nsh> mount -t vfat /dev/mtdblock0 /mnt/at25
+
+    b. If you change the value CONFIG_SYSTEM_USBMSC_DEVPATH1, then you
+       can export other file systems:
+
+        "/dev/mmcsd1" will export the HSMCI1 microSD
+        "/dev/mmcsd0" will export the HSMCI0 full-size SD slot
+        "/dev/ram0" could even be used to export a RAM disk.  But you would
+          first have to use mkrd to create the RAM disk and mkfatfs to put
+          a FAT file system on it.
+
+  CDC/ACM Serial Device Class
+  ---------------------------
+
+  This will select the CDC/ACM serial device.  Defaults for the other
+  options should be okay.
+
+    Device Drivers -> USB Device Driver Support
+      CONFIG_CDCACM=y                       : Enable the CDC/ACM device
+      CONFIG_CDCACM_BULKIN_REQLEN=768       : Default too small for high-speed
+
+  The following setting enables an example that can can be used to control
+  the CDC/ACM device.  It will add two new NSH commands:
+
+    a. sercon will connect the USB serial device (creating /dev/ttyACM0), and
+    b. serdis which will disconnect the USB serial device (destroying
+        /dev/ttyACM0).
+
+    Application Configuration -> Examples:
+      CONFIG_SYSTEM_CDCACM=y              : Enable an CDC/ACM example
+
+  Debugging USB Device
+  --------------------
+
+  There is normal console debug output available that can be enabled with
+  CONFIG_DEBUG + CONFIG_DEBUG_USB.  However, USB device operation is very
+  time critical and enabling this debug output WILL interfere with the
+  operation of the UDPHS.  USB device tracing is a less invasive way to get
+  debug information:  If tracing is enabled, the USB device will save
+  encoded trace output in in-memory buffer; if the USB monitor is also
+  enabled, that trace buffer will be periodically emptied and dumped to the
+  system logging device (the serial console in this configuration):
+
+    Device Drivers -> "USB Device Driver Support:
+      CONFIG_USBDEV_TRACE=y                   : Enable USB trace feature
+      CONFIG_USBDEV_TRACE_NRECORDS=256        : Buffer 256 records in memory
+      CONFIG_USBDEV_TRACE_STRINGS=y           : (optional)
+
+    Application Configuration -> NSH LIbrary:
+      CONFIG_NSH_USBDEV_TRACE=n               : No builtin tracing from NSH
+      CONFIG_NSH_ARCHINIT=y                   : Automatically start the USB monitor
+
+    Application Configuration -> System NSH Add-Ons:
+      CONFIG_SYSTEM_USBMONITOR=y              : Enable the USB monitor daemon
+      CONFIG_SYSTEM_USBMONITOR_STACKSIZE=2048 : USB monitor daemon stack size
+      CONFIG_SYSTEM_USBMONITOR_PRIORITY=50    : USB monitor daemon priority
+      CONFIG_SYSTEM_USBMONITOR_INTERVAL=1     : Dump trace data every second
+      CONFIG_SYSTEM_USBMONITOR_TRACEINIT=y    : Enable TRACE output
+      CONFIG_SYSTEM_USBMONITOR_TRACECLASS=y
+      CONFIG_SYSTEM_USBMONITOR_TRACETRANSFERS=y
+      CONFIG_SYSTEM_USBMONITOR_TRACECONTROLLER=y
+      CONFIG_SYSTEM_USBMONITOR_TRACEINTERRUPTS=y
+
+  NOTE: If USB debug output is also enabled, both outputs will appear on the
+  serial console.  However, the debug output will be asynchronous with the
+  trace output and, hence, difficult to interpret.
+
+USB High-Speed Host
+===================
+
+  OHCI Only
+  ---------
+
+  Support the USB low/full-speed OHCI host driver can be enabled by changing
+  the NuttX configuration file as follows:
+
+    System Type -> ATSAMA5 Peripheral Support
+      CONFIG_SAMA5_UHPHS=y                 : USB Host High Speed
+
+    System Type -> USB High Speed Host driver options
+      CONFIG_SAMA5_OHCI=y                  : Low/full-speed OHCI support
+                                           : Defaults for values probably OK
+    Device Drivers
+      CONFIG_USBHOST=y                     : Enable USB host support
+
+    Device Drivers -> USB Host Driver Support
+      CONFIG_USBHOST_ISOC_DISABLE=y        : Isochronous endpoints not used
+      CONFIG_USBHOST_MSC=y                 : Enable the mass storage class driver
+      CONFIG_USBHOST_HIDKBD=y              : Enable the HID keyboard class driver
+
+    Library Routines
+      CONFIG_SCHED_WORKQUEUE=y             : Worker thread support is required
+
+    Application Configuration -> NSH Library
+      CONFIG_NSH_ARCHINIT=y                 : NSH board-initialization
+
+  NOTE:  When OHCI is selected, the SAMA5 will operate at 384MHz instead of
+  396MHz.  This is so that the PLL generates a frequency which is a multiple
+  of the 48MHz needed for OHCI.  The delay loop calibration values that are
+  used will be off slightly because of this.
+
+  EHCI
+  ----
+
+  Support the USB high-speed EHCI host driver can be enabled by changing the
+  NuttX configuration file as follows.  If EHCI is enabled by itself, then
+  only high-speed devices can be supported.  If OHCI is also enabled, then
+  all low-, full-, and high speed devices will work.
+
+    System Type -> ATSAMA5 Peripheral Support
+      CONFIG_SAMA5_UHPHS=y                 : USB Host High Speed
+
+    System Type -> USB High Speed Host driver options
+      CONFIG_SAMA5_EHCI=y                  : High-speed EHCI support
+      CONFIG_SAMA5_OHCI=y                  : Low/full-speed OHCI support
+                                               : Defaults for values probably OK for both
+    Device Drivers
+      CONFIG_USBHOST=y                     : Enable USB host support
+      CONFIG_USBHOST_INT_DISABLE=y         : Interrupt endpoints not needed
+      CONFIG_USBHOST_ISOC_DISABLE=y        : Isochronous endpoints not needed
+
+    Device Drivers -> USB Host Driver Support
+      CONFIG_USBHOST_ISOC_DISABLE=y        : Isochronous endpoints not used
+      CONFIG_USBHOST_MSC=y                 : Enable the mass storage class driver
+      CONFIG_USBHOST_HIDKBD=y              : Enable the HID keyboard class driver
+
+    Library Routines
+      CONFIG_SCHED_WORKQUEUE=y             : Worker thread support is required
+
+    Application Configuration -> NSH Library
+      CONFIG_NSH_ARCHINIT=y                 : NSH board-initialization
+
+  Mass Storage Device Usage
+  -------------------------
+
+  Example Usage:
+
+    NuttShell (NSH) NuttX-6.29
+    nsh> ls /dev
+     /dev:
+     console
+     mtdblock0
+     null
+     ttyS0
+
+  Here a USB FLASH stick is inserted.  Nothing visible happens in the
+  shell.  But a new device will appear:
+
+    nsh> ls /dev
+    /dev:
+     console
+     mtdblock0
+     null
+     sda
+     ttyS0
+    nsh> mount -t vfat /dev/sda /mnt/sda
+    nsh> ls -l /mnt/sda
+    /mnt/sda:
+     -rw-rw-rw-    8788 viminfo
+     drw-rw-rw-       0 .Trash-1000/
+     -rw-rw-rw-    3378 zmodem.patch
+     -rw-rw-rw-    1503 sz-1.log
+     -rw-rw-rw-     613 .bashrc
+
+  HID Keyboard Usage
+  ------------------
+
+  If a (supported) USB keyboard is connected, a /dev/kbda device will appear:
+
+    nsh> ls /dev
+    /dev:
+     console
+     kbda
+     mtdblock0
+     null
+     ttyS0
+
+  /dev/kbda is a read-only serial device.  Reading from /dev/kbda will get
+  keyboard input as ASCII data (other encodings are possible):
+
+    nsh> cat /dev/kbda
+
+  Debugging USB Host
+  ------------------
+
+  There is normal console debug output available that can be enabled with
+  CONFIG_DEBUG + CONFIG_DEBUG_USB.  However, USB host operation is very time
+  critical and enabling this debug output might interfere with the operation
+  of the UDPHS.  USB host tracing is a less invasive way to get debug
+  information:  If tracing is enabled, the USB host will save encoded trace
+  output in in-memory buffer; if the USB monitor is also enabled, that trace
+  buffer will be periodically emptied and dumped to the system logging device
+  (the serial console in this configuration):
+
+    Device Drivers -> "USB Host Driver Support:
+      CONFIG_USBHOST_TRACE=y                   : Enable USB host trace feature
+      CONFIG_USBHOST_TRACE_NRECORDS=256        : Buffer 256 records in memory
+      CONFIG_USBHOST_TRACE_VERBOSE=y           : Buffer everything
+
+    Application Configuration -> NSH LIbrary:
+      CONFIG_NSH_USBDEV_TRACE=n               : No builtin tracing from NSH
+      CONFIG_NSH_ARCHINIT=y                   : Automatically start the USB monitor
+
+    Application Configuration -> System NSH Add-Ons:
+      CONFIG_SYSTEM_USBMONITOR=y              : Enable the USB monitor daemon
+      CONFIG_SYSTEM_USBMONITOR_STACKSIZE=2048 : USB monitor daemon stack size
+      CONFIG_SYSTEM_USBMONITOR_PRIORITY=50    : USB monitor daemon priority
+      CONFIG_SYSTEM_USBMONITOR_INTERVAL=1     : Dump trace data every second
+
+  NOTE: If USB debug output is also enabled, both outpus will appear on the
+  serial console.  However, the debug output will be asynchronous with the
+  trace output and, hence, difficult to interpret.
+
+NOR FLASH Support
+=================
+
+  Most of these configurations execute out of CS0 NOR flash and can only be
+  loaded via SAM-BA.  These are the relevant configuration options the
+  define the NOR FLASH configuration:
+
+    CONFIG_SAMA5_BOOT_CS0FLASH=y            : Boot from FLASH on CS0
+    CONFIG_BOOT_RUNFROMFLASH=y              : Run in place on FLASH (vs copying to RAM)
+
+    CONFIG_SAMA5_EBICS0=y                   : Enable CS0 external memory
+    CONFIG_SAMA5_EBICS0_SIZE=134217728      : Memory size is 128KB
+    CONFIG_SAMA5_EBICS0_NOR=y               : Memory type is NOR FLASH
+
+    CONFIG_FLASH_START=0x10000000           : Physical FLASH start address
+    CONFIG_FLASH_VSTART=0x10000000          : Virtual FLASH start address
+    CONFIG_FLASH_SIZE=134217728             : FLASH size (again)
+
+    CONFIG_RAM_START=0x00300400             : Data stored after page table
+    CONFIG_RAM_VSTART=0x00300400
+    CONFIG_RAM_SIZE=114688                  : Available size of 128KB - 16KB for page table
+
+  NOTE:  In order to boot in this configuration, you need to close the BMS
+  jumper.
+
+  STATUS:  I have been unable to execute these configurations from NOR FLASH
+  by closing the BMS jumper (J9).  As far as I can tell, this jumper does
+  nothing on my board???  So I have been using the norboot configuration
+  exclusively to start the program-under-test in NOR FLASH (see the section
+  entitled "Creating and Using NORBOOT" above.)
+
+SDRAM Support
+=============
+
+  SRAM Heap Configuration
+  -----------------------
+
+  In these configurations, .data and .bss are retained in ISRAM.  SDRAM can
+  be initialized and included in the heap.  Relevant configuration settings:
+
+    System Type->ATSAMA5 Peripheral Support
+      CONFIG_SAMA5_MPDDRC=y                 : Enable the DDR controller
+
+    System Type->External Memory Configuration
+      CONFIG_SAMA5_DDRCS=y                  : Tell the system that DRAM is at the DDR CS
+      CONFIG_SAMA5_DDRCS_SIZE=268435456     : 2Gb DRAM -> 256GB
+      CONFIG_SAMA5_DDRCS_LPDDR2=y           : Its DDR2
+      CONFIG_SAMA5D3XPLAINED_MT47H128M16RT=y          : This is the type of DDR2
+
+    System Type->Heap Configuration
+      CONFIG_SAMA5_DDRCS_HEAP=y             : Add the SDRAM to the heap
+      CONFIG_SAMA5_DDRCS_HEAP_OFFSET=0
+      CONFIG_SAMA5_DDRCS_HEAP_SIZE=268435456
+
+    Memory Management
+      CONFIG_MM_REGIONS=2                   : Two heap memory regions:  ISRAM and SDRAM
+
+  RAM Test
+  --------
+
+  Another thing you could do is to enable the RAM test built-in application.
+  You can enable the NuttX RAM test that may be used to verify the external
+  SDRAM.  To do this, keep the SDRAM out of the heap so that it can be tested
+  without crashing programs using the memory:
+
+    System Type->Heap Configuration
+      CONFIG_SAMA5_DDRCS_HEAP=n             : Don't add the SDRAM to the heap
+
+    Memory Management
+      CONFIG_MM_REGIONS=1                   : One memory regions:  ISRAM
+
+  Then enable the RAM test built-in application:
+
+    Application Configuration->System NSH Add-Ons->Ram Test
+      CONFIG_SYSTEM_RAMTEST=y
+
+  In this configuration, the SDRAM is not added to heap and so is not
+  accessable to the applications.  So the RAM test can be freely executed
+  against the SRAM memory beginning at address 0x2000:0000 (DDR CS):
+
+    nsh> ramtest -h
+    Usage: <noname> [-w|h|b] <hex-address> <decimal-size>
+
+    Where:
+      <hex-address> starting address of the test.
+      <decimal-size> number of memory locations (in bytes).
+      -w Sets the width of a memory location to 32-bits.
+      -h Sets the width of a memory location to 16-bits (default).
+      -b Sets the width of a memory location to 8-bits.
+
+    To test the entire external 256MB SRAM:
+
+    nsh> ramtest -w 20000000 268435456
+    RAMTest: Marching ones: 20000000 268435456
+    RAMTest: Marching zeroes: 20000000 268435456
+    RAMTest: Pattern test: 20000000 268435456 55555555 aaaaaaaa
+    RAMTest: Pattern test: 20000000 268435456 66666666 99999999
+    RAMTest: Pattern test: 20000000 268435456 33333333 cccccccc
+    RAMTest: Address-in-address test: 20000000 268435456
+
+  SDRAM Data Configuration
+  ------------------------
+ 
+  In these configurations, .data and .bss are retained in ISRAM by default.
+  .data and .bss can also be retained in SDRAM using these slightly
+  different configuration settings.  In this configuration, ISRAM is
+  used only for the Cortex-A5 page table for the IDLE thread stack.
+
+    System Type->ATSAMA5 Peripheral Support
+      CONFIG_SAMA5_MPDDRC=y                 : Enable the DDR controller
+
+    System Type->External Memory Configuration
+      CONFIG_SAMA5_DDRCS=y                  : Tell the system that DRAM is at the DDR CS
+      CONFIG_SAMA5_DDRCS_SIZE=268435456     : 2Gb DRAM -> 256GB
+      CONFIG_SAMA5_DDRCS_LPDDR2=y           : Its DDR2
+      CONFIG_SAMA5D3XPLAINED_MT47H128M16RT=y          : This is the type of DDR2
+
+    System Type->Heap Configuration
+      CONFIG_SAMA5_ISRAM_HEAP=n              : These do not apply in this case
+      CONFIG_SAMA5_DCRS_HEAP=n
+
+    System Type->Boot Memory Configuration
+      CONFIG_RAM_START=0x20000000           : Physical address of SDRAM
+      CONFIG_RAM_VSTART=0x20000000          : Virtual address of SDRAM
+      CONFIG_RAM_SIZE=268435456             : Size of SDRAM
+      CONFIG_BOOT_SDRAM_DATA=y              : Data is in SDRAM
+
+      Care must be used applied these RAM locations; graphics
+      configurations may use SDRAM in an incompatible way to set aside
+      LCD framebuffers.
+
+    Memory Management
+      CONFIG_MM_REGIONS=1                   : One heap memory region:  ISDRAM
+
+NAND Support
+============
+
+  NAND support is only partial in that there is no file system that works
+  with it properly.  Lower-level NAND support has been developed and
+  verified, but there is no way to use it in the current NuttX architecture
+  other than through the raw MTD interface.
+
+  NAND should still be considered a work in progress.  You will not want to
+  use NAND unless you are interested in investing a little effort,
+  particularly in infrastructure. See the "STATUS SUMMARY" section below.
+
+  NAND Support
+  ------------
+
+  NAND Support can be added to the NSH configuration by modifying the
+  NuttX configuration file as follows:
+
+    Build Setup
+      CONFIG_EXPERIMENTAL=y             : NXFFS implementation is incomplete and
+                                        : not yet fully functional.
+
+    System Type -> SAMA5 Peripheral support
+      CONFIG_SAMA5_HSMC=y               : Make sure that the SMC is enabled
+
+    Drivers -> Memory Technology Device (MTD) Support
+      CONFIG_MTD=y                      : Enable MTD support
+      CONFIG_MTD_NAND=y                 : Enable NAND support
+      CONFIG_MTD_NAND_BLOCKCHECK=n      : Interferes with NXFFS bad block checking
+      CONFIG_MTD_NAND_SWECC=y           : Use S/W ECC calculation
+
+      Defaults for all other NAND settings should be okay
+
+    System Type -> External Memory Configuration
+      CONFIG_SAMA5_EBICS3=y             : Enable External CS3 memory
+      CONFIG_SAMA5_EBICS3_NAND=y        : Select NAND memory type
+      CONFIG_SAMA5_EBICS3_SIZE=8388608  : Use this size
+      CONFIG_SAMA5_EBICS3_SWECC=y       : Use S/W ECC calculation
+
+      Defaults for ROM page table addresses should be okay
+
+    Application Configuration -> NSH Library
+      CONFIG_NSH_ARCHINIT=y             : Use architecture-specific initialization
+
+    NOTES:
+
+    1. WARNING:  This will wipe out everything that you may have on the NAND
+       FLASH!  I have found that using the JTAG with no valid image on NAND
+       or Serial FLASH is a problem:  In that case, the code always ends up
+       in the SAM-BA bootloader.
+
+       My understanding is that you can enable JTAG in this case by simply
+       entering any data on the DBG serial port.  I have not tried this.
+       Instead, I just changed to boot from Serial Flash:
+
+    2. Booting from Serial Flash. The work around for this case is to put
+       the NORBOOT image into Serial FLASH.  Then, the system will boot from
+       Serial FLASH by copying the NORBOOT image in SRAM which will run and
+       then start the image in NOR FLASH.  See the discussion of the NORBOOT
+       configuration in the "Creating and Using NORBOOT" section above.
+
+       NOTE that there is jumper on the CM module that must be closed to enable
+       use of the AT25 Serial Flash.  Also, if you are using using SAM-BA,
+       make sure that you load the NOR boot program into the boot area via
+       the pull-down menu.
+
+    3. Unfortunately, there are no appropriate NAND file system in NuttX as
+       of this writing.  The following sections discussion issues/problems
+       with using NXFFS and FAT.
+
+    PMECC
+    -----
+
+    Hardware ECC calculation using the SAMA5D3's PMECC can be enable as
+    follows:
+
+    Drivers -> Memory Technology Device (MTD) Support
+      CONFIG_MTD_NAND_SWECC=y           : Don't use S/W ECC calculation
+      CONFIG_MTD_NAND_HWECC=y           : Use H/W ECC instead
+
+    System Type -> External Memory Configuration
+      CONFIG_SAMA5_EBICS3_SWECC=n       : Don't use S/W ECC calculation
+      CONFIG_SAMA5_HAVE_PMECC=n         : Use H/W ECC instead
+
+    Other PMECC-related default settings should be okay.
+
+    STATUS:  As of the writing, NAND transfers using PMECC appear to
+    work correctly.  However, the PMECC based systems do not work as
+    as well with FAT or NXFFS.  My belief that that the FAT/NXFFS layers
+    are inappropriate for NAND and, as a result, happen not to work with
+    the PMECC ECC calculation.  See also the "STATUS SUMMARY" section below.
+
+    DMA Support
+    -----------
+
+    DMA support can be enabled as follows:
+
+    System Type -> SAMA5 Peripheral support
+      CONFIG_SAMA5_DMAC0=y              : Use DMAC0 for memory-to-memory DMA
+
+    System Type -> External Memory Configuration
+      CONFIG_SAMA5_NAND_DMA=y           : Use DMAC0 for NAND data transfers
+
+    STATUS:  DMA appears to be functional, but probably has not been
+    exercised enough to claim that with any certainty.  See also the "STATUS
+    SUMMARY" section below.
+
+    NXFFS
+    -----
+
+    The NuttX FLASH File System (NXFFS) works well with NOR-like FLASH
+    but does not work well with NAND (See comments below under STATUS)
+
+    File Systems:
+      CONFIG_FS_NXFFS=y                 : Enable the NXFFS file system
+
+      Defaults for all other NXFFS settings should be okay.
+
+      NOTE:  NXFFS will require some significant buffering because of
+      the large size of the NAND flash blocks.  You will also need
+      to enable SDRAM as described above.
+
+    Board Selection
+      CONFIG_SAMA5D3XPLAINED_NAND_AUTOMOUNT=y     : Enable FS support on NAND
+      CONFIG_SAMA5D3XPLAINED_NAND_NXFFS=y         : Use the NXFFS file system
+
+      Other file systems are not recommended because only NXFFS can handle
+      bad blocks and only NXFFS performs wear-levelling.
+
+    FAT
+    ---
+
+    Another option is FAT.  FAT, however, is not appropriate for use with
+    NAND: FAT will not handle bad blocks, does not perform any wear
+    levelling, and may not conform to writing ordering requirements of NAND.
+    Also, there appear to be issues with FAT when PMECC is enabled (see
+    "STATUS SUMMARY" below).
+
+    File Systems:
+      CONFIG_FS_FAT=y                   : Enable the FAT FS
+      CONFIG_FAT_LCNAMES=y              : With lower case name support
+      CONFIG_FAT_LFN=y                  : And (patented) FAT long file name support
+      CONFIG_FS_NXFFS=n                 : Don't need NXFFS
+
+      Defaults for all other NXFFS settings should be okay.
+
+    Board Selection
+      CONFIG_SAMA5D3XPLAINED_NAND_AUTOMOUNT=y     : Enable FS support on NAND
+      CONFIG_SAMA5D3XPLAINED_NAND_FTL=y           : Use an flash translation layer
+
+      NOTE:  FTL will require some significant buffering because of
+      the large size of the NAND flash blocks.  You will also need
+      to enable SDRAM as described above.
+
+    SMART FS
+    --------
+
+    Another option is Smart FS.  Smart FS is another small file system
+    designed to work with FLASH.  Properties:  It does support some wear-
+    leveling like NXFFS, but like FAT, cannot handle bad blocks and like
+    NXFFS, it will try to re-write erased bits.
+
+    Using NAND with NXFFS
+    ---------------------
+
+    With the options CONFIG_SAMA5D3XPLAINED_NAND_AUTOMOUNT=y and
+    CONFIG_SAMA5D3XPLAINED_NAND_NXFFS=y, the NAND FLASH will be mounted in the NSH
+    start-up logic before the NSH prompt appears.  There is no feedback as
+    to whether or not the mount was successful.  You can, however, see the
+    mounted file systems using the nsh 'mount' command:
+
+      nsh> mount
+      /mnt/nand type nxffs
+
+    Then NAND can be used like any other file system:
+
+      nsh> echo "This is a test" >/mnt/nand/atest.txt
+      nsh> ls -l /mnt/nand
+      /mnt/nand:
+       ---x--x--x      16 atest.txt
+      nsh> cat /mnt/nand/atest.txt
+      This is a test
+
+    The NAND volume can be un-mounted with this comment:
+
+      nsh> umount /mnt/nand
+      nsh> mount
+
+    And re-mounted with this command:
+
+      nsh> mount -t nxffs /mnt/mystuff
+      nsh> mount
+        /mnt/mystuff type nxffs
+
+    NOTES:
+      1. NXFFS can be very slow.  The first time that you start the system,
+         be prepared for a wait; NXFFS will need to format the NAND volume.
+         I have lots of debug on so I don't yet know what the optimized wait
+         will be.  But with debug ON, software ECC, and no DMA the wait is
+         in many tens of minutes (and substantially  longer if many debug
+         options are enabled.
+
+         [I don't yet have data for the more optimal cases. It will be
+          significantly less, but still not fast.]
+
+      2. On subsequent boots, after the NXFFS file system has been created
+         the delay will be less.  When the new file system is empty, it will
+         be very fast.  But the NAND-related boot time can become substantial
+         when there has been a lot of usage of the NAND.  This is because
+         NXFFS needs to scan the NAND device and build the in-memory dataset
+         needed to access NAND and there is more that must be scanned after
+         the device has been used.  You may want to create a separate thread at
+         boot time to bring up NXFFS so that you don't delay the boot-to-prompt
+         time excessively in these longer delay cases.
+
+      3. There is another NXFFS related performance issue:  When the FLASH
+         is fully used, NXFFS will restructure the entire FLASH, the delay
+         to restructure the entire FLASH will probably be even larger.  This
+         solution in this case is to implement an NXFSS clean-up daemon that
+         does the job a little-at-a-time so that there is no massive clean-up
+         when the FLASH becomes full.
+
+      4. Bad NXFFS behavior with NAND:  If you restart NuttX, the files that
+         you wrote to NAND will be gone.  Why?  Because the multiple writes
+         have corrupted the NAND ECC bits.  See STATUS below.  NXFFS would
+         require a major overhaul to be usable with NAND.
+
+    Using NAND with FAT
+    -------------------
+
+    If configured for FAT, the system will create block driver at
+    /dev/mtdblock0:
+
+      NuttShell (NSH)
+      nsh> ls /dev
+      /dev:
+       console
+       mtdblock0
+       null
+       ttyS0
+
+    You will not that the system comes up immediately because there is not
+    need to scan the volume in this case..
+
+    The NSH 'mkfatfs' command can be used to format a FAT file system on
+    NAND.
+
+      nsh> mkfatfs /dev/mtdblock0
+
+    This step, on the other hand, requires quite a bit of time.
+
+    And the FAT file system can be mounted like:
+
+      nsh> mount -t vfat /dev/mtdblock0 /mnt/nand
+      nsh> ls /mnt/nand
+      /mnt/nand:
+
+      nsh> echo "This is a test" > /mnt/nand/atest.txt
+
+        NOTE:  This will take a long time because it will require reading,
+        modifying, and re-writing the 128KB erase page!
+
+      nsh> ls -l /mnt/nand
+      /mnt/nand:
+       -rw-rw-rw-      16 atest.txt
+
+      nsh> cat /mnt/fat/atest.txt
+      This is a test
+
+    NOTES:
+
+    1. Unlike NXFFS, FAT can work with NAND (at least with PMECC disabled).
+       But there are some significant issues.
+
+    2. First, each NAND write access will cause a 256KB data transfer:  It
+       will read the entire 128KB erase block, modify it and write it back
+       to memory.  There is some caching logic so that this cached erase
+       block can be re-used if possible and writes will be deferred as long
+       as possible.
+
+    3. If you hit a bad block, then FAT is finished.  There is no mechanism
+       in place in FAT not to mark and skip over bad blocks.
+
+    What is Needed
+    --------------
+
+    What is needed to work with FAT properly would be another MTD layer
+    between the FTL layer and the NAND FLASH layer.  That layer would
+    perform bad block detection and sparing so that FAT works transparently
+    on top of the NAND.
+
+    Another, less general, option would be support bad blocks within FAT.
+
+  STATUS SUMMARY
+  --------------
+
+  1. PMECC appears to be working in that I can write a NAND block with its
+     ECC and read the block back and verify that that is are no bit
+     failures.  However, when attempting to work with FAT, it does not
+     work correctly:  The MBR is written and read back correctly, but gets
+     corrupted later for unknown reasons.
+
+  2. DMA works (at least with software ECC), but I have seen occasional
+     failures.  I recommend enabling DMA with caution.
+
+     In NuttX, DMA will also cost two context switches (and, hence, four
+     register state transfers).  With smaller NAND page sizes (say 2KiB and
+     below), I would expect little or no performance improvement with DMA
+     for this reason.
+
+  3. NXFFS does not work with NAND. NAND differs from other other FLASH
+     types several ways.  For one thing, NAND requires error correction
+     (ECC) bytes that must be set in order to work around bit failures.
+     This affects NXFFS in two ways:
+
+     a. First, write failures are not fatal. Rather, they should be tried by
+        bad blocks and simply ignored.  This is because unrecoverable bit
+        failures will cause read failures when reading from NAND.  Setting
+        the CONFIG_EXPERIMENTAL+CONFIG_NXFFS_NANDs option will enable this
+        behavior.
+
+     b. Secondly, NXFFS will write a block many times.  It tries to keep
+        bits in the erased state and assumes that it can overwrite those bits
+        to change them from the erased to the non-erased state.  This works
+        will with NOR-like FLASH.  NAND behaves this way too.  But the
+        problem with NAND is that the ECC bits cannot be re-written in this
+        way.  So once a block has been written, it cannot be modified.  This
+        behavior has NOT been fixed in NXFFS.  Currently, NXFFS will attempt
+        to re-write the ECC bits causing the ECC to become corrupted because
+        the ECC bits cannot be overwritten without erasing the entire block.
+
+     This may prohibit NXFFS from ever being used with NAND.
+
+  4. As mentioned above, FAT does work but (1) has some performance issues on
+     writes and (2) cannot handle bad blocks.
+
+I2C Tool
+========
+
+  I2C Tool. NuttX supports an I2C tool at apps/system/i2c that can be used
+  to peek and poke I2C devices.  That tool cal be enabled by setting the
+  following:
+
+    System Type -> SAMA5 Peripheral Support
+      CONFIG_SAMA5_TWI0=y                   : Enable TWI0
+      CONFIG_SAMA5_TWI1=y                   : Enable TWI1
+      CONFIG_SAMA5_TWI2=y                   : Enable TWI2
+
+    System Type -> TWI device driver options
+      SAMA5_TWI0_FREQUENCY=100000           : Select a TWI0 frequency
+      SAMA5_TWI1_FREQUENCY=100000           : Select a TWI1 frequency
+      SAMA5_TWI2_FREQUENCY=100000           : Select a TWI2 frequency
+
+    Device Drivers -> I2C Driver Support
+      CONFIG_I2C=y                          : Enable I2C support
+      CONFIG_I2C_TRANSFER=y                 : Driver supports the transfer() method
+      CONFIG_I2C_WRITEREAD=y                : Driver supports the writeread() method
+
+    Application Configuration -> NSH Library
+      CONFIG_SYSTEM_I2CTOOL=y               : Enable the I2C tool
+      CONFIG_I2CTOOL_MINBUS=0               : TWI0 has the minimum bus number 0
+      CONFIG_I2CTOOL_MAXBUS=2               : TWI2 has the maximum bus number 2
+      CONFIG_I2CTOOL_DEFFREQ=100000         : Pick a consistent frequency
+
+    The I2C tool has extensive help that can be accessed as follows:
+
+    nsh> i2c help
+    Usage: i2c <cmd> [arguments]
+    Where <cmd> is one of:
+
+      Show help     : ?
+      List busses   : bus
+      List devices  : dev [OPTIONS] <first> <last>
+      Read register : get [OPTIONS] [<repititions>]
+      Show help     : help
+      Write register: set [OPTIONS] <value> [<repititions>]
+      Verify access : verf [OPTIONS] [<value>] [<repititions>]
+
+    Where common "sticky" OPTIONS include:
+      [-a addr] is the I2C device address (hex).  Default: 03 Current: 03
+      [-b bus] is the I2C bus number (decimal).  Default: 0 Current: 0
+      [-r regaddr] is the I2C device register address (hex).  Default: 00 Current: 00
+      [-w width] is the data width (8 or 16 decimal).  Default: 8 Current: 8
+      [-s|n], send/don't send start between command and data.  Default: -n Current: -n
+      [-i|j], Auto increment|don't increment regaddr on repititions.  Default: NO Current: NO
+      [-f freq] I2C frequency.  Default: 100000 Current: 100000
+
+    NOTES:
+    o Arguments are "sticky".  For example, once the I2C address is
+      specified, that address will be re-used until it is changed.
+
+    WARNING:
+    o The I2C dev command may have bad side effects on your I2C devices.
+      Use only at your own risk.
+
+    As an example, the I2C dev comman can be used to list all devices
+    responding on TWI0 (the default) like this:
+
+      nsh> i2c dev 0x03 0x77
+          0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
+      00:          -- -- -- -- -- -- -- -- -- -- -- -- --
+      10: -- -- -- -- -- -- -- -- -- -- 1a -- -- -- -- --
+      20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+      30: -- -- -- -- -- -- -- -- -- 39 -- -- -- 3d -- --
+      40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+      50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+      60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
+      70: -- -- -- -- -- -- -- --
+      nsh>
+
+     Address 0x1a is the WM8904.  Address 0x39 is the SIL9022A. I am not sure
+     what is at address 0x3d and 0x60
+
+CAN Usage
+=========
+  I planned to verify CAN using the IXXAT USB-to-CAN Compact.  This section
+  provides miscellaneous CAN-related notes, mostly to myself but perhaps of
+  interest to others.
+
+  [Unfortunately, as of this writing, I still do not have a proper CAN test
+   bed to verify the CAN driver.]
+
+  CAN Configuration
+  -----------------
+
+  The following steps illustrate how to enable CAN0 and/or CAN1 in the NuttX
+  configuration:
+
+    System Type -> SAMA5 Peripheral Support
+       CONFIG_SAMA5_CAN0=y            : Select CAN0 and/or CAN1
+       CONFIG_SAMA5_CAN1=y
+
+    Device Drivers -> CAN Driver Support
+       CONFIG_CAN=y                   : (Automatically selected)
+       CONFIG_CAN_EXTID=y             : For extended, 29-bit CAN IDs
+
+    System Type -> CAN Drive Support
+       CONFIG_SAMA5_CAN0_BAUD=250000  : Select some BAUD for CAN0 (if enabled)
+       CONFIG_SAMA5_CAN0_NRECVMB=1    : Select number of receive mailboxes (see below)
+       CONFIG_SAMA5_CAN1_BAUD=250000  : Select some BAUD for CAN1 (if enabled)
+       CONFIG_SAMA5_CAN1_NRECVMB=1    : Select number of receive mailboxes (see below)
+
+  Receive Mailboxes and Address Filtering
+  ---------------------------------------
+
+  The SAMA5 CAN0 peripheral supports 8 mailboxes that can be used for sending
+  and receiving messages.  Note that the number of dedicated receive mailboxes
+  (CONFIG_SAMA5_CANn_NRECVMB) was set to one in the above configuration.  This
+  could be set to any value from 1 to 3 (the upper limit of 3 is purely
+  arbrary and can be increased with some minor code enhancement).  The
+  remainder can be configured dynamically to send CAN messages.
+
+  Why would you want to use more than one receive mailbox?  There are two
+  reasons. Multiple receive mailboxes might needed to either (1) receive
+  bursts of messages, or (2) to support multiple groups of messages filtered
+  on message ID.
+
+  You must also specify the address filtering for each dedicated receive mailbox:
+
+    System Type -> CAN Drive Support
+       CONFIG_SAMA5_CAN0_ADDR0 and CONFIG_SAMA5_CAN0_MASK0 : If CONFIG_SAMA5_CAN0_NRECVMB >= 1
+       CONFIG_SAMA5_CAN0_ADDR1 and CONFIG_SAMA5_CAN0_MASK1 : If CONFIG_SAMA5_CAN0_NRECVMB >= 2
+       CONFIG_SAMA5_CAN0_ADDR2 and CONFIG_SAMA5_CAN0_MASK2 : If CONFIG_SAMA5_CAN0_NRECVMB >= 3
+       CONFIG_SAMA5_CAN1_ADDR0 and CONFIG_SAMA5_CAN1_MASK0 : If CONFIG_SAMA5_CAN1_NRECVMB >= 1
+       CONFIG_SAMA5_CAN1_ADDR1 and CONFIG_SAMA5_CAN1_MASK1 : If CONFIG_SAMA5_CAN1_NRECVMB >= 2
+       CONFIG_SAMA5_CAN1_ADDR2 and CONFIG_SAMA5_CAN1_MASK2 : If CONFIG_SAMA5_CAN1_NRECVMB >= 3
+
+  Only messages that have IDs that match the CONFIG_SAMA5_CANn_ADDRn when both
+  the received and the configured address are masked by CONFIG_SAMA5_CANn_MASKn
+  will be accepted.  For example, if the mask is all ones, then only messasges
+  with exact address matches will be accepted; if the mask is all zeroes than
+  any address will be accepted.
+
+  CAN connectors
+  --------------
+
+  CAN1 and CAN2 are available via RJ-11 connectors on the SAMA5D3-Xplained.  Each
+  is wired as follows.  Also shown below is the matching pins if you want connect
+  the CAN to a device that uses an DB-9 connector (Such as the IXXAT USB-to-CAN
+  Compact).  Both connector types (as well as RJ-45) are common.
+
+                    +----------+     RJ-11       DB-9
+                    |    O     |     ----------- --------------
+  +------------+    |          |     Pin 1 3v3   Pin 1 N/C
+  |    +--+    |    |  o5      |     Pin 2 5v    Pin 2 CANL
+  |    |  |    |    |       o9 |     Pin 3 N/C   Pin 3 GND
+  |  +-+  +-+  |    |  o4      |     Pin 4 CANL  Pin 4 N/C
+  |  |      |  |    |       o8 |     Pin 5 CANH  Pin 5 N/C
+  |  |654321|  |    |  o3      |     Pin 6 N/C   Pin 6 N/C
+  |  |oooooo|  |    |       o7 |                 Pin 7 CANH
+  |  +------+  |    |  o2      |                 Pin 8 N/C
+  +------------+    |       o6 |                 Pin 9 CANV+ (N/C on IXXAT)   RJ-11 Female     |  x1      |
+                    |          |
+                    |    O     |
+                    +----------+
+                      DB-9 Male
+
+SAMA5 ADC Support
+=================
+
+  Basic driver configuration
+  --------------------------
+  ADC support can be added to the NSH configuration.  However, there are no
+  ADC input pins available to the user for ADC testing (the touchscreen ADC
+  inputs are intended for other functionality).  Because of this, there is
+  not much motivation to enable ADC support on the SAMA5D3-Xplained.  This
+  paragraph is included here, however, for people using a custom SAMA5D3x
+  board that requires ADC support.
+
+    System Type -> SAMA5 Peripheral Support
+      CONFIG_SAMA5_ADC=y               : Enable ADC driver support
+      CONFIG_SAMA5_TC0=y               : Enable the Timer/counter library need for periodic sampling
+
+    Drivers
+      CONFIG_ANALOG=y                  : Should be automatically selected
+      CONFIG_ADC=y                     : Should be automatically selected
+
+    System Type -> ADC Configuration
+      CONFIG_SAMA5_ADC_CHAN0=y         : These settings enable the sequencer to collect
+      CONFIG_SAMA5_ADC_CHAN1=y         : Samples from ADC channels 0-3 on each trigger
+      CONFIG_SAMA5_ADC_CHAN2=y
+      CONFIG_SAMA5_ADC_CHAN3=y
+      CONFIG_SAMA5_ADC_SEQUENCER=y
+
+      CONFIG_SAMA5_ADC_TIOA0TRIG=y     : Trigger on the TC0, channel 0 output A
+      CONFIG_SAMA5_ADC_TIOAFREQ=2      : At a frequency of 2Hz
+      CONFIG_SAMA5_ADC_TIOA_RISING=y   : Trigger on the rising edge
+
+    Default ADC settings (like gain and offset) may also be set if desired.
+
+    System Type -> Timer/counter Configuration
+      CONFIG_SAMA5_TC0_TIOA0=y         : Should be automatically selected
+
+  Work queue supported is also needed:
+
+    Library routines
+      CONFIG_SCHED_WORKQUEUE=y
+
+  ADC Test Example
+  ----------------
+  For testing purposes, there is an ADC program at apps/examples/adc that
+  will collect a specified number of samples.  This test program can be
+  enabled as follows:
+
+    Application Configuration -> Examples -> ADC example
+      CONFIG_EXAMPLES_ADC=y            : Enables the example code
+      CONFIG_EXAMPLES_ADC_DEVPATH="/dev/adc0"
+
+    Other default settings for the ADC example should be okay.
+
+  ADC DMA Support
+  ---------------
+  At 2Hz, DMA is not necessary nor desire-able.  The ADC driver has support
+  for DMA transfers of converted data (although that support has not been
+  tested as of this writing).  DMA support can be added by include the
+  following in the configuration.
+
+    System Type -> SAMA5 Peripheral Support
+      CONFIG_SAMA5_DMAC1=y             : Enable DMAC1 support
+
+    System Type -> ADC Configuration
+      CONFIG_SAMA5_ADC_DMA=y           : Enable ADC DMA transfers
+      CONFIG_SAMA5_ADC_DMASAMPLES=2    : Collect two sets of samples per DMA
+
+    Drivers -> Analog device (ADC/DAC) support
+      CONFIG_ADC_FIFOSIZE=16           : Driver may need a large ring buffer
+
+    Application Configuration -> Examples -> ADC example
+      CONFIG_EXAMPLES_ADC_GROUPSIZE=16 : Larger buffers in the test
+
+SAMA5 PWM Support
+=================
+
+  Basic driver configuration
+  --------------------------
+  PWM support can be added to the NSH configuration.  However, there are no
+  PWM output pins available to the user for PWM testing.  Because of this,
+  there is not much motivation to enable PWM support on the SAMA5D3-Xplained.  This
+  paragraph is included here, however, for people using a custom SAMA5D3x
+  board that requires PWM support.
+
+  Basic driver configuration:
+
+    System Type -> SAMA5 Peripheral Support
+      CONFIG_SAMA5_PWM=y               : Enable PWM driver support
+
+    Drivers
+      CONFIG_PWM=y                     : Should be automatically selected
+
+    PWM Channel/Output Selection
+    ----------------------------
+    In order to use the PWM, you must enable one or more PWM Channels:
+
+    System Type -> PWM Configuration
+      CONFIG_SAMA5_PWM_CHAN0=y         : Enable one or more of channels 0-3
+      CONFIG_SAMA5_PWM_CHAN1=y
+      CONFIG_SAMA5_PWM_CHAN2=y
+      CONFIG_SAMA5_PWM_CHAN3=y
+
+    For each channel that is enabled, you must also specify the output pins
+    to be enabled and the clocking supplied to the PWM channel.
+
+      CONFIG_SAMA5_PWM_CHANx_FAULTINPUT=n : (not used currently)
+      CONFIG_SAMA5_PWM_CHANx_OUTPUTH=y  : Enable One of both of the H and L output pins
+      CONFIG_SAMA5_PWM_CHANx_OUTPUTL=y
+
+    Where x=0..3.
+
+    Care must be taken because all PWM output pins conflict with some other
+    usage of the pin by other devices.  Furthermore, many of these pins have
+    not been brought out to an external connector:
+
+      -----+---+---+----+------+----------------
+       PWM  PIN PER PIO   I/O   CONFLICTS
+      -----+---+---+----+------+----------------
+       PWM0 FI   B  PC28 J2.30  SPI1, ISI
+            H    B  PB0   ---   GMAC
+                 B  PA20 J1.14  LCDC, ISI
+            L    B  PB1   ---   GMAC
+                 B  PA21 J1.16  LCDC, ISI
+      -----+---+---+----+------+----------------
+       PWM1 FI   B  PC31 J2.36  HDMI
+            H    B  PB4   ---   GMAC
+                 B  PA22 J1.18  LCDC, ISI
+            L    B  PB5   ---   GMAC
+                 B  PE31 J3.20  ISI, HDMI
+                 B  PA23 J1.20  LCDC, ISI
+      -----+---+---+----+------+----------------
+       PWM2 FI   B  PC29 J2.29  UART0, ISI, HDMI
+            H    C  PD5   ---   HSMCI0
+                 B  PB8   ---   GMAC
+            L    C  PD6   ---   HSMCI0
+                 B  PB9   ---   GMAC
+      -----+---+---+----+------+----------------
+       PWM3 FI   C  PD16  ---  SPI0, Audio
+            H    C  PD7   ---  HSMCI0
+                 B  PB12 J3.7  GMAC
+            L    C  PD8   ---  HSMCI0
+                 B  PB13  ---  GMAC
+      -----+---+---+----+--------------------
+
+    See configs/sama5d3-xplained/include/board.h for all of the default PWM
+    pin selections.  I used PWM channel 0, pins PA20 and PA21 for testing.
+
+    Clocking is addressed in the next paragraph.
+
+    PWM Clock Configuration
+    -----------------------
+    PWM Channels can be clocked from either a coarsely divided divided down
+    MCK or from a custom frequency from PWM CLKA and/or CLKB.  If you want
+    to use CLKA or CLKB, you must enable and configure them.
+
+    System Type -> PWM Configuration
+      CONFIG_SAMA5_PWM_CLKA=y
+      CONFIG_SAMA5_PWM_CLKA_FREQUENCY=3300
+      CONFIG_SAMA5_PWM_CLKB=y
+      CONFIG_SAMA5_PWM_CLKB_FREQUENCY=3300
+
+    Then for each of the enabled, channels you must select the input clock
+    for that channel:
+
+    System Type -> PWM Configuration
+      CONFIG_SAMA5_PWM_CHANx_CLKA=y     : Pick one of MCK, CLKA, or CLKB (only)
+      CONFIG_SAMA5_PWM_CHANx_CLKB=y
+      CONFIG_SAMA5_PWM_CHANx_MCK=y
+      CONFIG_SAMA5_PWM_CHANx_MCKDIV=128 : If MCK is selected, then the MCK divider must
+                                        : also be provided (1,2,4,8,16,32,64,128,256,512, or 1024).
+
+  PWM Test Example
+  ----------------
+  For testing purposes, there is an PWM program at apps/examples/pwm that
+  will collect a specified number of samples.  This test program can be
+  enabled as follows:
+
+    Application Configuration -> Examples -> PWM example
+      CONFIG_EXAMPLES_PWM=y            : Enables the example code
+
+    Other default settings for the PWM example should be okay.
+
+      CONFIG_EXAMPLES_PWM_DEVPATH="/dev/pwm0"
+      CONFIG_EXAMPLES_PWM_FREQUENCY=100
+
+  Usage of the example is straightforward:
+
+    nsh> pwm -h
+    Usage: pwm [OPTIONS]
+
+    Arguments are "sticky".  For example, once the PWM frequency is
+    specified, that frequency will be re-used until it is changed.
+
+    "sticky" OPTIONS include:
+      [-p devpath] selects the PWM device.  Default: /dev/pwm0 Current: /dev/pwm0
+      [-f frequency] selects the pulse frequency.  Default: 100 Hz Current: 100 Hz
+      [-d duty] selects the pulse duty as a percentage.  Default: 50 % Current: 50 %
+      [-t duration] is the duration of the pulse train in seconds.  Default: 5 Current: 5
+      [-h] shows this message and exits
+
+RTC
+===
+
+  The Real Time Clock/Calendar RTC) may be enabled with these settings:
+
+    System Type:
+      CONFIG_SAMA5_RTC=y                   : Enable the RTC driver
+
+    Drivers (these values will be selected automatically):
+      CONFIG_RTC=y                         : Use the RTC for system time
+      CONFIG_RTC_DATETIME=y                : RTC supports data/time
+
+  The RTC supports an alarm that may be enable with the following settings.
+  However, there is nothing in the system that currently makes use of this
+  alarm.
+
+    Drivers:
+      CONFIG_RTC_ALARM=y                   : Enable the RTC alarm
+
+    Library Routines
+      CONFIG_SCHED_WORKQUEUE=y              : Alarm needs work queue support
+
+Watchdog Timer
+==============
+
+  NSH can be configured to exercise the watchdog timer test
+  (apps/examples/watchdog).  This can be selected with the following
+  settings in the NuttX configuration file:
+
+    System Type:
+      CONFIG_SAMA5_WDT=y                  : Enable the WDT peripheral
+                                          : Defaults in "RTC Configuration" should be OK
+
+    Drivers (this will automatically be selected):
+      CONFIG_WATCHDOG=y                   : Enables watchdog timer driver support
+
+    Application Configuration -> Examples
+      CONFIG_EXAMPLES_WATCHDOG=y          : Enable apps/examples/watchdog
+
+  The WDT timer is driven off the slow, 32768Hz clock divided by 128. As a
+  result, the watchdog a maximum timeout value of 16 seconds.  The SAMA5 WDT
+  may also only be programmed one time; the processor must be reset before
+  the WDT can be reprogrammed.
+
+  The SAMA5 always boots with the watchdog timer enabled at its maximum
+  timeout (16 seconds).  In the normal case where no watchdog timer driver
+  has been configured, the watchdog timer is disabled as part of the start
+  up logic.  But, since we are permitted only one opportunity to program
+  the WDT, we cannot disable the watchdog time if CONFIG_SAMA5_WDT=y.  So,
+  be forewarned:  You have only 16 seconds to run your watchdog timer test!
+
+  NOTE:  If you are using the norboot program to run from FLASH as I did,
+  beware that the default version also disables the watchdog.  You will
+  need a special version of norboot with CONFIG_SAMA5_WDT=y.
+
+TRNG and /dev/random
+====================
+
+  NSH can be configured to enable the SAMA5 TRNG peripheral so that it
+  provides /dev/random.  The following configuration will enable the TRNG,
+  /dev/random, and the simple test of /dev/random at apps/examples/ranadom:
+
+    System Type:
+      CONFIG_SAMA5_TRNG=y                 : Enable the TRNG peripheral
+
+    Drivers (automatically selected):
+      CONFIG_DEV_RANDOM=y                 : Enable /dev/random
+
+    Applications -> Examples
+      CONFIG_EXAMPLES_RANDOM=y            : Enable apps/examples/random
+      CONFIG_EXAMPLES_MAXSAMPLES=64       : Default settings are probably OK
+      CONFIG_EXAMPLES_NSAMPLES=8
+
+I2S Audio Support
+=================
+
+  The SAMA5D3-Xplained has two devices on-board that can be used for verification
+  of I2S functionality:  HDMI and a WM8904 audio CODEC.  As of this writing,
+  the I2S driver is present, but there are not drivers for either the HDMI
+  or the WM8904.
+
+  WM8904 Audio CODEC Interface
+  ----------------------------
+
+    ------------- ---------------- -----------------
+    WM8904        SAMA5D3          NuttX Pin Name
+    ------------- ---------------- -----------------
+     3 SDA        PA30 TWD0        PIO_TWI0_D
+     2 SCLK       PA31 TWCK0       PIO_TWI0_CK
+    28 MCLK       PD30 PCK0        PIO_PMC_PCK0
+    29 BCLK/GPIO4 PC16 TK          PIO_SSC0_TK
+    "" "        " PC19 RK          PIO_SSC0_RK
+    30 LRCLK      PC17 TF          PIO_SSC0_TF
+    "" "   "      PC20 RF          PIO_SSC0_RF
+    31 ADCDAT     PC21 RD          PIO_SSC0_RD
+    32 DACDAT     PC18 TD          PIO_SSC0_TD
+     1 IRQ/GPIO1  PD16 INT_AUDIO   N/A
+    ------------- ---------------- -----------------
+
+  I2S Loopback Test
+  -----------------
+
+  The I2S driver was verified using a special I2C character driver (at
+  nuttx/drivers/audio/i2schar.c) and a test driver at apps/examples/i2schar.
+  The I2S driver was verified in loopback mode with no audio device.
+
+  [NOTE: The above statement is anticipatory:  As of this writing I2S driver
+   verification is underway and still not complete].
+
+  This section describes the modifications to the NSH configuration that were
+  used to perform the I2S testing:
+
+    System Type -> SAMA5 Peripheral Support
+      CONFIG_SAMA5_SSCO=y              : Enable SSC0 driver support
+      CONFIG_SAMA5_DMAC0=y             : DMAC0 required by SSC0
+
+    Alternatively, SSC1 could have be used:
+
+    System Type -> SAMA5 Peripheral Support
+      CONFIG_SAMA5_SSC1=y              : Enable SSC0 driver support
+      CONFIG_SAMA5_DMAC1=y             : DMAC0 required by SSC0
+
+    System Type -> SSC Configuration
+      CONFIG_SAMA5_SSC_MAXINFLIGHT=16  : Up to 16 pending DMA transfers
+      CONFIG_SAMA5_SSC0_MASTER=y       : Master mode
+      CONFIG_SAMA5_SSC0_DATALEN=16     : 16-bit data
+      CONFIG_SAMA5_SSC0_RX=y           : Support a receiver
+      CONFIG_SAMA5_SSC0_RX_RKINPUT=y   : Receiver gets clock from RK input
+      CONFIG_SAMA5_SSC0_TX=y           : Support a transmitter
+      CONFIG_SAMA5_SSC0_TX_MCKDIV=y    : Transmitter gets clock from MCK/2
+      CONFIG_SAMA5_SSC0_MCKDIV_SAMPLERATE=48000 : Sampling at 48K samples/sec
+      CONFIG_SAMA5_SSC0_TX_TKOUTPUT_XFR=y  : Outputs clock on TK when transferring data
+      CONFIG_SAMA5_SSC0_LOOPBACK=y     : Loopmode mode connects RD/TD and RK/TK
+
+    Audio
+      CONFIG_AUDIO=y                   : Audio support needed
+                                       : Defaults should be okay
+
+    Drivers -> Audio
+      CONFIG_I2S=y                     : General I2S support
+      CONFIG_AUDIO_DEVICES=y           : Audio device support
+      CONFIG_AUDIO_I2SCHAR=y           : Build I2S character driver
+
+    The following describes how I have the test application at
+    apps/examples/i2schar configured:
+
+      CONFIG_EXAMPLES_I2SCHAR=y
+      CONFIG_EXAMPLES_I2SCHAR_DEVPATH="/dev/i2schar0"
+      CONFIG_EXAMPLES_I2SCHAR_TX=y
+      CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS=4
+      CONFIG_EXAMPLES_I2SCHAR_TXSTACKSIZE=1536
+      CONFIG_EXAMPLES_I2SCHAR_RX=y
+      CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS=4
+      CONFIG_EXAMPLES_I2SCHAR_RXSTACKSIZE=1536
+      CONFIG_EXAMPLES_I2SCHAR_BUFSIZE=256
+      CONFIG_EXAMPLES_I2SCHAR_DEVINIT=y
+
+    Board Selection
+      CONFIG_SAMA5D3XPLAINED_I2SCHAR_MINOR=0
+      CONFIG_SAMA5D3XPLAINED_SSC_PORT=0     : 0 or SSC0, 1 for SSC1
+
+    Library Routines
+      CONFIG_SCHED_WORKQUEUE=y          : Driver needs work queue support
+
+SAMA5D3-Xplained Configuration Options
+=================================
+
+  CONFIG_ARCH - Identifies the arch/ subdirectory.  This should
+  be set to:
+
+    CONFIG_ARCH="arm"
+
+  CONFIG_ARCH_family - For use in C code:
+
+    CONFIG_ARCH_ARM=y
+
+  CONFIG_ARCH_architecture - For use in C code:
+
+    CONFIG_ARCH_CORTEXA5=y
+
+  CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
+
+    CONFIG_ARCH_CHIP="sama5"
+
+  CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
+  chip:
+
+    CONFIG_ARCH_CHIP_SAMA5=y
+
+  and one of:
+
+   CONFIG_ARCH_CHIP_ATSAMA5D31=y
+   CONFIG_ARCH_CHIP_ATSAMA5D33=y
+   CONFIG_ARCH_CHIP_ATSAMA5D34=y
+   CONFIG_ARCH_CHIP_ATSAMA5D35=y
+
+  CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
+  hence, the board that supports the particular chip or SoC.
+
+    CONFIG_ARCH_BOARD="sama5d3-xplained" (for the SAMA5D3-Xplained development board)
+
+  CONFIG_ARCH_BOARD_name - For use in C code
+
+    CONFIG_ARCH_BOARD_SAMA5D3_XPLAINED=y
+
+  CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
+  of delay loops
+
+  CONFIG_ENDIAN_BIG - define if big endian (default is little
+  endian)
+
+  CONFIG_RAM_SIZE - Describes the installed DRAM (SRAM in this case):
+
+    CONFIG_RAM_SIZE=0x0002000 (128Kb)
+
+  CONFIG_RAM_START - The physical start address of installed DRAM
+
+    CONFIG_RAM_START=0x20000000
+
+  CONFIG_RAM_VSTART - The virutal start address of installed DRAM
+
+    CONFIG_RAM_VSTART=0x20000000
+
+  CONFIG_ARCH_IRQPRIO - The SAM3UF103Z supports interrupt prioritization
+
+    CONFIG_ARCH_IRQPRIO=y
+
+  CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
+  have LEDs
+
+  CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
+  stack. If defined, this symbol is the size of the interrupt
+  stack in bytes.  If not defined, the user task stacks will be
+  used during interrupt handling.
+
+  CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
+
+  CONFIG_ARCH_LEDS -  Use LEDs to show state. Unique to board architecture.
+
+  CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
+  cause a 100 second delay during boot-up.  This 100 second delay
+  serves no purpose other than it allows you to calibrate
+  CONFIG_ARCH_LOOPSPERMSEC.  You simply use a stop watch to measure
+  the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
+  the delay actually is 100 seconds.
+
+  Individual subsystems can be enabled:
+
+    CONFIG_SAMA5_DBGU        - Debug Unit Interrupt
+    CONFIG_SAMA5_PIT         - Periodic Interval Timer Interrupt
+    CONFIG_SAMA5_WDT         - Watchdog timer Interrupt
+    CONFIG_SAMA5_HSMC        - Multi-bit ECC Interrupt
+    CONFIG_SAMA5_SMD         - SMD Soft Modem
+    CONFIG_SAMA5_USART0      - USART 0
+    CONFIG_SAMA5_USART1      - USART 1
+    CONFIG_SAMA5_USART2      - USART 2
+    CONFIG_SAMA5_USART3      - USART 3
+    CONFIG_SAMA5_UART0       - UART 0
+    CONFIG_SAMA5_UART1       - UART 1
+    CONFIG_SAMA5_TWI0        - Two-Wire Interface 0
+    CONFIG_SAMA5_TWI1        - Two-Wire Interface 1
+    CONFIG_SAMA5_TWI2        - Two-Wire Interface 2
+    CONFIG_SAMA5_HSMCI0      - High Speed Multimedia Card Interface 0
+    CONFIG_SAMA5_HSMCI1      - High Speed Multimedia Card Interface 1
+    CONFIG_SAMA5_HSMCI2      - High Speed Multimedia Card Interface 2
+    CONFIG_SAMA5_SPI0        - Serial Peripheral Interface 0
+    CONFIG_SAMA5_SPI1        - Serial Peripheral Interface 1
+    CONFIG_SAMA5_TC0         - Timer Counter 0 (ch. 0, 1, 2)
+    CONFIG_SAMA5_TC1         - Timer Counter 1 (ch. 3, 4, 5)
+    CONFIG_SAMA5_PWM         - Pulse Width Modulation Controller
+    CONFIG_SAMA5_ADC         - Touch Screen ADC Controller
+    CONFIG_SAMA5_DMAC0       - DMA Controller 0
+    CONFIG_SAMA5_DMAC1       - DMA Controller 1
+    CONFIG_SAMA5_UHPHS       - USB Host High Speed
+    CONFIG_SAMA5_UDPHS       - USB Device High Speed
+    CONFIG_SAMA5_GMAC        - Gigabit Ethernet MAC
+    CONFIG_SAMA5_EMAC        - Ethernet MAC
+    CONFIG_SAMA5_LCDC        - LCD Controller
+    CONFIG_SAMA5_ISI         - Image Sensor Interface
+    CONFIG_SAMA5_SSC0        - Synchronous Serial Controller 0
+    CONFIG_SAMA5_SSC1        - Synchronous Serial Controller 1
+    CONFIG_SAMA5_CAN0        - CAN controller 0
+    CONFIG_SAMA5_CAN1        - CAN controller 1
+    CONFIG_SAMA5_SHA         - Secure Hash Algorithm
+    CONFIG_SAMA5_AES         - Advanced Encryption Standard
+    CONFIG_SAMA5_TDES        - Triple Data Encryption Standard
+    CONFIG_SAMA5_TRNG        - True Random Number Generator
+    CONFIG_SAMA5_ARM         - Performance Monitor Unit
+    CONFIG_SAMA5_FUSE        - Fuse Controller
+    CONFIG_SAMA5_MPDDRC      - MPDDR controller
+
+  Some subsystems can be configured to operate in different ways. The drivers
+  need to know how to configure the subsystem.
+
+    CONFIG_SAMA5_PIOA_IRQ    - Support PIOA interrupts
+    CONFIG_SAMA5_PIOB_IRQ    - Support PIOB interrupts
+    CONFIG_SAMA5_PIOC_IRQ    - Support PIOD interrupts
+    CONFIG_SAMA5_PIOD_IRQ    - Support PIOD interrupts
+    CONFIG_SAMA5_PIOE_IRQ    - Support PIOE interrupts
+
+    CONFIG_USART0_ISUART     - USART0 is configured as a UART
+    CONFIG_USART1_ISUART     - USART1 is configured as a UART
+    CONFIG_USART2_ISUART     - USART2 is configured as a UART
+    CONFIG_USART3_ISUART     - USART3 is configured as a UART
+
+  ST91SAMA5 specific device driver settings
+
+    CONFIG_U[S]ARTn_SERIAL_CONSOLE - selects the USARTn (n=0,1,2,3) or UART
+           m (m=4,5) for the console and ttys0 (default is the USART1).
+    CONFIG_U[S]ARTn_RXBUFSIZE - Characters are buffered as received.
+       This specific the size of the receive buffer
+    CONFIG_U[S]ARTn_TXBUFSIZE - Characters are buffered before
+       being sent.  This specific the size of the transmit buffer
+    CONFIG_U[S]ARTn_BAUD - The configure BAUD of the UART.  Must be
+    CONFIG_U[S]ARTn_BITS - The number of bits.  Must be either 7 or 8.
+    CONFIG_U[S]ARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
+    CONFIG_U[S]ARTn_2STOP - Two stop bits
+
+  AT91SAMA5 USB Host Configuration
+  Pre-requisites
+
+    CONFIG_USBDEV          - Enable USB device support
+    CONFIG_USBHOST         - Enable USB host support
+    CONFIG_SAMA5_UHPHS     - Needed
+    CONFIG_SAMA5_OHCI      - Enable the STM32 USB OTG FS block
+    CONFIG_SCHED_WORKQUEUE - Worker thread support is required
+
+  Options:
+
+    CONFIG_SAMA5_OHCI_NEDS
+      Number of endpoint descriptors
+    CONFIG_SAMA5_OHCI_NTDS
+      Number of transfer descriptors
+    CONFIG_SAMA5_OHCI_TDBUFFERS
+      Number of transfer descriptor buffers
+    CONFIG_SAMA5_OHCI_TDBUFSIZE
+      Size of one transfer descriptor buffer
+    CONFIG_USBHOST_INT_DISABLE
+      Disable interrupt endpoint support
+    CONFIG_USBHOST_ISOC_DISABLE
+      Disable isochronous endpoint support
+    CONFIG_USBHOST_BULK_DISABLE
+      Disable bulk endpoint support
+
+config SAMA5_OHCI_REGDEBUG
+
+Configurations
+==============
+
+  Information Common to All Configurations
+  ----------------------------------------
+  Each SAMA5D3-Xplained configuration is maintained in a sub-directory and
+  can be selected as follow:
+
+    cd tools
+    ./configure.sh sama5d3-xplained/<subdir>
+    cd -
+    . ./setenv.sh
+
+  Before sourcing the setenv.sh file above, you should examine it and perform
+  edits as necessary so that TOOLCHAIN_BIN is the correct path to the directory
+  than holds your toolchain binaries.
+
+  And then build NuttX by simply typing the following.  At the conclusion of
+  the make, the nuttx binary will reside in an ELF file called, simply, nuttx.
+
+    make
+
+  The <subdir> that is provided above as an argument to the tools/configure.sh
+  must be is one of the following.
+
+  NOTES:
+
+  1. These configurations use the mconf-based configuration tool.  To
+    change any of these configurations using that tool, you should:
+
+    a. Build and install the kconfig-mconf tool.  See nuttx/README.txt
+       and misc/tools/
+
+    b. Execute 'make menuconfig' in nuttx/ in order to start the
+       reconfiguration process.
+
+  2. Unless stated otherwise, all configurations generate console
+     output on UART0 (J3).
+
+  3. All of these configurations use the Code Sourcery for Windows toolchain
+     (unless stated otherwise in the description of the configuration).  That
+     toolchain selection can easily be reconfigured using 'make menuconfig'.
+     Here are the relevant current settings:
+
+     Build Setup:
+       CONFIG_HOST_WINDOWS=y               : Microsoft Windows
+       CONFIG_WINDOWS_CYGWIN=y             : Using Cygwin or other POSIX environment
+
+     System Type -> Toolchain:
+       CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW=y : GNU EABI toolchain for windows
+
+     That same configuration will work with Atmel GCC toolchain.  The only
+     change required to use the Atmel GCC toolchain is to change the PATH
+     variable so that those tools are selected instead of the CodeSourcery
+     tools.  Try 'which arm-none-eabi-gcc' to make sure that you are
+     selecting the right tool.
+
+     The setenv.sh file is available for you to use to set the PATH
+     variable.  The path in the that file may not, however, be correct
+     for your installation.
+
+     See also the "NOTE about Windows native toolchains" in the section call
+     "GNU Toolchain Options" above.
+
+     !!!WARNING!!! The first time that you type 'make', the system will
+     configure itself based on the settings in the .config file.  One of
+     these settings can cause a lot of confusion if you configure the build
+     in the wrong state:  If you are running on Linux, make *certain* that
+     you have CONFIG_HOST_LINUX=y *before* the first make or you will
+     create a very corrupt configuration that may not be easy to recover
+     from.
+
+  Configuration Sub-directories
+  -----------------------------
+  Summary:  Some of the descriptions below are long and wordy. Here is the
+  concise summary of the available SAMA5D3-Xplained configurations:
+
+    norboot:
+      This is a little program to help debug of code in NOR flash.  I wrote
+      it because I don't yet understand how to get the SAMA5 to boot from
+      NOR FLASH.  See the description below and the section above entitled
+      "Creating and Using NORBOOT" for more information
+    nsh:  This is another NSH configuration, not too different from the
+      demo configuration.  The nsh configuration is, however, bare bones.
+      It is the simplest possible NSH configuration and is useful as a
+      platform for debugging and integrating new features in isolation.
+
+  There may be issues with some of these configurations.  See the details
+  before of the status of individual configurations.
+
+  Now for the gory details:
+
+  norboot:
+    This is a little program to help debug of code in NOR flash.  It
+    does the following:
+
+    - It enables and configures NOR FLASH, then
+    - Waits for you to break in with GDB.
+
+    At that point, you can set the PC and begin executing from NOR FLASH
+    under debug control.  See the section entitled "Creating and Using
+    NORBOOT" above.
+
+    NOTES:
+
+    1. This program derives from the hello configuration.  All of the
+       notes there apply to this configuration as well.
+
+    2. The default norboot program initializes the NOR memory,
+       displays a message and halts.  The norboot program can also be
+       configured to jump directly into NOR FLASH without requiring the
+       final halt and go by setting CONFIG_SAMA5D3XPLAINED_NOR_START=y in the
+       NuttX configuration.
+
+    3. Be aware that the default norboot also disables the watchdog.
+       Since you will not be able to re-enable the watchdog later, you may
+       need to set CONFIG_SAMA5_WDT=y in the NuttX configuration file.
+
+    4. If you put norboot on the Serial FLASH, you can automatically
+       boot to NOR on reset.  See the section "Creating and Using NORBOOT"
+       above.
+
+    STATUS:
+       See the To-Do list below
+
+  nsh:
+
+    This configuration directory provide the NuttShell (NSH).  There are
+    two NSH configurations:  nsh and demo.  The difference is that nsh is
+    intended to be a very simple NSH configuration upon which you can build
+    further functionality.  The demo configuration, on the other hand, is
+    intended to be a rich configuration that shows many features all working
+    together.
+
+    NOTES:
+    1. This configuration uses the default USART1 serial console.  That
+       is easily changed by reconfiguring to (1) enable a different
+       serial peripheral, and (2) selecting that serial peripheral as
+       the console device.
+
+    2. By default, this configuration is set up to build on Windows
+       under either a Cygwin or MSYS environment using a recent, Windows-
+       native, generic ARM EABI GCC toolchain (such as the CodeSourcery
+       toolchain).  Both the build environment and the toolchain
+       selection can easily be changed by reconfiguring:
+
+       CONFIG_HOST_WINDOWS=y                   : Windows operating system
+       CONFIG_WINDOWS_CYGWIN=y                 : POSIX environment under windows
+       CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery for Windows
+
+       If you are running on Linux, make *certain* that you have
+       CONFIG_HOST_LINUX=y *before* the first make or you will create a
+       corrupt configuration that may not be easy to recover from. See
+       the warning in the section "Information Common to All Configurations"
+       for further information.
+
+    3. This configuration executes out of CS0 NOR flash and can only
+       be loaded via SAM-BA.  The are the relevant configuration options
+       are provided above in the section entitled "NOR FLASH Support".
+
+    4. This configuration has support for NSH built-in applications enabled.
+       However, no built-in applications are selected in the base configuration.
+
+    5. Data resides in ISRAM, but can be moved to SDRAM as described above
+       under "SDRAM Data Configuration."
+
+    6. This configuration has support for the FAT file system built in.  However,
+       by default, there are no block drivers initialized.  The FAT file system can
+       still be used to create RAM disks.
+
+    7. SDRAM support can be enabled by modifying your NuttX configuration as
+       described above in the paragraph entitle "SDRAM Support"
+
+    8. The SAMA5D3 Xplained board includes an option serial DataFlash.  Support
+       for that serial FLASH can be enabled by modifying the NuttX configuration
+       as described above in the paragraph entitled "AT25 Serial FLASH".
+
+    9. Enabling HSMCI support. The SAMA5D3-Xplained provides a two SD memory
+       card slots:  (1) a full size SD card slot (J10), and (2) a microSD
+       memory card slot (J11).  The full size SD card slot connects via HSMCI0;
+       the microSD connects vi HSMCI1.  Support for both SD slots can be enabled
+       with the settings provided in the paragraph entitled "HSMCI Card Slots"
+       above.
+
+    10. Support the USB low-, high- and full-speed OHCI host driver can be enabled
+        by changing the NuttX configuration file as described in the section
+        entitled "USB High-Speed Host" above.
+
+    11. Support the USB high-speed USB device driver (UDPHS) can be enabled
+        by changing the NuttX configuration file as described above in the
+        section entitled "USB High-Speed Device."
+
+    12. I2C Tool. NuttX supports an I2C tool at apps/system/i2c that can be
+        used to peek and poke I2C devices.  See the discussion above under
+        "I2C Tool" for detailed configuration settings.
+
+    13. Networking support via the can be added to NSH by modifying the
+        configuration.  See the "Networking" section above for detailed
+        configuration settings.
+
+    16. The Real Time Clock/Calendar RTC) may be enabled by reconfiguring NuttX.
+        See the section entitled "RTC" above for detailed configuration settings.
+
+    17. This example can be configured to exercise the watchdog timer test
+        (apps/examples/watchdog).  See the detailed configuration settings in
+        the section entitled "Watchdog Timer" above.
+
+    18. This example can be configured to enable the SAMA5 TRNG peripheral so
+        that it provides /dev/random.  See the section entitled "TRNG and
+        /dev/random" above for detailed configuration information.
+
+    19. See also the sections above for additional configuration options:
+        "CAN Usage", "SAMA5 ADC Support", "SAMA5 PWM Support", "I2S Audio
+        Support"
+
+    STATUS:
+       See the To-Do list below
+
+      I2C
+      2014-9-12:  The I2C tool, however, seems to work well.  It succesfully
+        enumerates the devices on the bus and successfully exchanges a few
+        commands.  The real test of the come later when a real I2C device is
+        integrated.
+
+To-Do List
+==========
+
+1) Currently the SAMA5Dx is running at 396MHz in these configurations.  This
+   is because the timing for the PLLs, NOR FLASH, and SDRAM came from the
+   Atmel NoOS sample code which runs at that rate.  The SAMA5Dx is capable
+   of running at 528MHz, however.  The setup for that configuration exists
+   in the Bareboard assembly language setup and should be incorporated.
+
+2) Most of these configurations execute from NOR FLASH. I have been unable
+   to execute these configurations from NOR FLASH by closing the BMS jumper
+   (J9).  As far as I can tell, this jumper does nothing on my board???  I
+   have been using the norboot configuration to start the program in NOR
+   FLASH (see just above).  See "Creating and Using NORBOOT" above.
+
+3) Neither USB OHCI nor EHCI support Isochronous endpoints.  Interrupt
+   endpoint support in the EHCI driver is untested (but works in similar
+   EHCI drivers).
+
+4) HSCMI TX DMA support is currently commented out.
+
+5) I believe that there is an issue when the internal AT25 FLASH is
+   formatted by NuttX.  That format works fine with Linux, but does not
+   appear to work with Windows.  Reformatting on Windows can resolve this.
+   NOTE:  This is not a SAMA5Dx issue.
+
+   UPDATE: Two important bugs were recently fixed in the NuttX FAT
+   formatting function (mkfatfs).  It is likely that these fixes will
+   eliminate this issue, but that has not yet been verified.
+
+6) CAN testing has not yet been performed due to issues with cabling.  I
+   just do not have a good test bed (or sufficient CAN knowledge) for
+   good CAN testing.
+
+7) The NxWM example does not work well.  This example was designed to work
+   with much smaller displays and does not look good or work well with the
+   SAMA5D3-Xplained's 800x480 display.  See above for details.
+
+8) I have a Camera, but there is still no ISI driver.  I am not sure what to
+   do with the camera.  NuttX needs something like V4L to provide the
+   definition for what a camera driver is supposed to do.
+
+   I will probably develop a test harness for ISI, but it is of only
+   minimal value with no OS infrastructure to deal with images and video.
+
+9) GMAC has only been tested on a 10/100Base-T network.  I don't have a
+   1000Base-T network to support additional testing.
diff --git a/nuttx/configs/sama5d3-xplained/include/board.h b/nuttx/configs/sama5d3-xplained/include/board.h
new file mode 100644
index 000000000..59292dfdf
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/include/board.h
@@ -0,0 +1,341 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/include/board.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_H
+#define __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/* Clocking *************************************************************************/
+/* After power-on reset, the SAMA5 device is running on a 12MHz internal RC.  These
+ * definitions will configure operational clocking.
+ */
+
+#if 1 /* #if !defined(CONFIG_SAMA5_OHCI) || defined(CONFIG_SAMA5_EHCI) */
+/* This is the configuration provided in the Atmel example code.  This setup results
+ * in a CPU clock of 396MHz.
+ *
+ * In this configuration, UPLL is the source of the UHPHS clock (if enabled).
+ */
+
+#  include <arch/board/board_396mhz.h>
+
+#else
+/* OHCI Only.  This is an alternative slower configuration that will produce a 48MHz
+ * USB clock with the required accuracy using only PLLA.  When PPLA is used to clock
+ * OHCI, an additional requirement is the PLLACK be a multiple of 48MHz.  This setup
+ * results in a CPU clock of 384MHz.
+ */
+
+#  include <arch/board/board_384mhz.h>
+
+#endif
+
+/* LED definitions ******************************************************************/
+/* There are two LEDs on the SAMA5D3 series-CM board that can be controlled
+ * by software.  A  blue LED is controlled via PIO pins.  A red LED normally
+ * provides an indication that power is supplied to the board but can also
+ * be controlled via software.
+ *
+ *   PE23.  This blue LED is pulled high and is illuminated by pulling PE23
+ *   low.
+ *
+ *   PE24.  The red LED is also pulled high but is driven by a transistor so
+ *   that it is illuminated when power is applied even if PE24 is not
+ *   configured as an output.  If PE24 is configured as an output, then the
+ *   LCD is illuminated by a high output.
+ */
+
+/* LED index values for use with sam_setled() */
+
+#define BOARD_BLUE        0
+#define BOARD_RED         1
+#define BOARD_NLEDS       2
+
+/* LED bits for use with sam_setleds() */
+
+#define BOARD_BLUE_BIT    (1 << BOARD_BLUE)
+#define BOARD_RED_BIT     (1 << BOARD_RED)
+
+/* These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
+ * defined.  In that case, the usage by the board port is defined in
+ * include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related
+ * events as follows:
+ *
+ *      SYMBOL            Val    Meaning                     LED state
+ *                                                         Blue     Red
+ *      ----------------- ---   -----------------------  -------- --------   */
+#define LED_STARTED       0  /* NuttX has been started     OFF      OFF      */
+#define LED_HEAPALLOCATE  0  /* Heap has been allocated    OFF      OFF      */
+#define LED_IRQSENABLED   0  /* Interrupts enabled         OFF      OFF      */
+#define LED_STACKCREATED  1  /* Idle stack created         ON       OFF      */
+#define LED_INIRQ         2  /* In an interrupt              No change       */
+#define LED_SIGNAL        2  /* In a signal handler          No change       */
+#define LED_ASSERTION     2  /* An assertion failed          No change       */
+#define LED_PANIC         3  /* The system has crashed     OFF      Blinking */
+#undef  LED_IDLE             /* MCU is is sleep mode         Not used        */
+
+/* Thus if the blue LED is statically on, NuttX has successfully booted and
+ * is, apparently, running normmally.  If the red is flashing at
+ * approximately 2Hz, then a fatal error has been detected and the system
+ * has halted.
+ */
+
+/* Button definitions ***************************************************************/
+/* The following push buttons switches are available:
+ *
+ *    1. One board reset button (BP2). When pressed and released, this push
+ *       button causes a power-on reset of the whole board.
+ *
+ *    2. One wakeup pushbutton that brings the processor out of Low-power mode
+ *       (BP1)
+ *
+ *    3. One user pushbutton (BP3)
+ *
+ *  Only the user push button (BP3) is controllable by software:
+ *
+ *    - PE29.  Pressing the switch connect PE29 to ground.  Therefore, PE29
+ *      must be pulled high internally.  When the button is pressed the SAMA5
+ *      will sense "0" is on PE29.
+
+#define BUTTON_USER       0
+#define NUM_BUTTONS       1
+
+#define BUTTON_USER_BIT   (1 << BUTTON_USER)
+
+/* NAND *****************************************************************************/
+
+/* Address for transferring command bytes to the nandflash, CLE A22*/
+
+#define BOARD_EBICS3_NAND_CMDADDR   0x60400000
+
+/* Address for transferring address bytes to the nandflash, ALE A21*/
+
+#define BOARD_EBICS3_NAND_ADDRADDR  0x60200000
+
+/* Address for transferring data bytes to the nandflash.*/
+
+#define BOARD_EBICS3_NAND_DATAADDR  0x60000000
+
+/* PIO configuration ****************************************************************/
+/* PWM.  There are no dedicated PWM output pins available to the user for PWM
+ * testing.  Care must be taken because all PWM output pins conflict with some other
+ * usage of the pin by other devices. Furthermore, many of these pins have not been
+ * brought out to an external connector:
+ *
+ *    -----+---+---+----+------+----------------
+ *     PWM  PIN PER PIO   I/O   CONFLICTS
+ *    -----+---+---+----+------+----------------
+ *     PWM0 FI   B  PC28 J2.30  SPI1, ISI
+ *          H    B  PB0   ---   GMAC
+ *               B  PA20 J1.14  LCDC, ISI
+ *          L    B  PB1   ---   GMAC
+ *               B  PA21 J1.16  LCDC, ISI
+ *    -----+---+---+----+------+----------------
+ *     PWM1 FI   B  PC31 J2.36  HDMI
+ *          H    B  PB4   ---   GMAC
+ *               B  PA22 J1.18  LCDC, ISI
+ *          L    B  PB5   ---   GMAC
+ *               B  PE31 J3.20  ISI, HDMI
+ *               B  PA23 J1.20  LCDC, ISI
+ *    -----+---+---+----+------+----------------
+ *     PWM2 FI   B  PC29 J2.29  UART0, ISI, HDMI
+ *          H    C  PD5   ---   HSMCI0
+ *               B  PB8   ---   GMAC
+ *          L    C  PD6   ---   HSMCI0
+ *               B  PB9   ---   GMAC
+ *    -----+---+---+----+------+----------------
+ *     PWM3 FI   C  PD16  ---  SPI0, Audio
+ *          H    C  PD7   ---  HSMCI0
+ *               B  PB12 J3.7  GMAC
+ *          L    C  PD8   ---  HSMCI0
+ *               B  PB13  ---  GMAC
+ *    -----+---+---+----+------+----------------
+ */
+
+/* PWM channel 0:
+ *
+ * PA20 and PA21 can be used if the LCDC or ISI are not selected.  These outputs are
+ * available on J1, pins 14 and 16, respectively.
+ *
+ * If the GMAC is not selected, then PB0 and PB1 could also be used.  However,
+ * these pins are not available at the I/O expansion connectors.
+ */
+
+#if !defined(CONFIG_SAMA5_LCDC) && !defined(CONFIG_SAMA5_ISI)
+#  define PIO_PWM0_H  PIO_PWM0_H_2
+#  define PIO_PWM0_L  PIO_PWM0_L_2
+#elif !defined(CONFIG_SAMA5_GMAC)
+#  define PIO_PWM0_H  PIO_PWM0_H_1
+#  define PIO_PWM0_L  PIO_PWM0_L_1
+#endif
+
+/* PWM channel 1:
+ *
+ * PA22 and PA23 can be used if the LCDC or ISI are not selected.  These outputs are
+ * available on J1, pins 18 and 20, respectively.
+ *
+ * PE31 can be used if the ISI is not selected (and the HDMI is not being used).
+ * That signal is available at J3 pin 20.
+ *
+ * If the GMAC is not selected, then PB4 and PB5 could also be used.  However,
+ * these pins are not available at the I/O expansion connectors.
+ */
+
+#if !defined(CONFIG_SAMA5_LCDC) && !defined(CONFIG_SAMA5_ISI)
+#  define PIO_PWM1_H  PIO_PWM1_H_2
+#elif !defined(CONFIG_SAMA5_GMAC)
+#  define PIO_PWM1_H  PIO_PWM1_H_1
+#endif
+
+#if !defined(CONFIG_SAMA5_LCDC) && !defined(CONFIG_SAMA5_ISI)
+#  define PIO_PWM1_L  PIO_PWM1_L_3
+#elif !defined(CONFIG_SAMA5_ISI)
+#  define PIO_PWM1_L  PIO_PWM1_L_2
+#elif !defined(CONFIG_SAMA5_GMAC)
+#  define PIO_PWM1_L  PIO_PWM1_L_1
+#endif
+
+/* PWM channel 2:
+ *
+ * None of the output pin options are available at any of the I/O expansion
+ * connectors for PWM channel 2
+ */
+
+#if !defined(CONFIG_SAMA5_HSMCI0)
+#  define PIO_PWM2_H  PIO_PWM2_H_1
+#  define PIO_PWM2_L  PIO_PWM2_L_1
+#elif !defined(CONFIG_SAMA5_GMAC)
+#  define PIO_PWM2_H  PIO_PWM2_H_2
+#  define PIO_PWM2_L  PIO_PWM2_L_2
+#endif
+
+/* PWM channel 3:
+ *
+ * If the GMAC is not selected, then PB12 can used and is available at J3 pin 7.
+ * None of the other output pins are accessible at the I/O expansion connectors.
+ */
+
+#if !defined(CONFIG_SAMA5_GMAC)
+#  define PIO_PWM3_H  PIO_PWM3_H_2
+#  define PIO_PWM3_L  PIO_PWM3_L_2
+#elif !defined(CONFIG_SAMA5_HSMCI0)
+#  define PIO_PWM3_H  PIO_PWM3_H_1
+#  define PIO_PWM3_L  PIO_PWM3_L_1
+#endif
+
+/************************************************************************************
+ * Assembly Language Macros
+ ************************************************************************************/
+
+#ifdef __ASSEMBLY__
+	.macro	config_sdram
+	.endm
+#endif /* __ASSEMBLY__ */
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+/************************************************************************************
+ * Name: sam_boardinitialize
+ *
+ * Description:
+ *   All SAMA5 architectures must provide the following entry point.  This entry point
+ *   is called early in the initialization -- after all memory has been configured
+ *   and mapped but before any devices have been initialized.
+ *
+ ************************************************************************************/
+
+void sam_boardinitialize(void);
+
+/************************************************************************************
+ * Name: sam_phyirq
+ *
+ * Description:
+ *   This function may be called to register an interrupt handler that will be
+ *   called when an interrupt is received from a PHY.
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_NET) && (defined(CONFIG_SAMA5_EMAC) || defined(CONFIG_SAMA5_GMAC)) && \
+    defined(CONFIG_SAMA5_PIOE_IRQ)
+xcpt_t sam_phyirq(int intf, xcpt_t irqhandler);
+#endif
+
+/************************************************************************************
+ * Name:  sam_ledinit, sam_setled, and sam_setleds
+ *
+ * Description:
+ *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LEDs.  If
+ *   CONFIG_ARCH_LEDS is not defined, then the following interfaces are available to
+ *   control the LEDs from user applications.
+ *
+ ************************************************************************************/
+
+#ifndef CONFIG_ARCH_LEDS
+void sam_ledinit(void);
+void sam_setled(int led, bool ledon);
+void sam_setleds(uint8_t ledset);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* !__ASSEMBLY__ */
+#endif  /* __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_H */
diff --git a/nuttx/configs/sama5d3-xplained/include/board_384mhz.h b/nuttx/configs/sama5d3-xplained/include/board_384mhz.h
new file mode 100644
index 000000000..d2fea9be7
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/include/board_384mhz.h
@@ -0,0 +1,230 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/include/board_384mhz.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_384MHZ_H
+#define __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_384MHZ_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/* Clocking *************************************************************************/
+/* After power-on reset, the SAMA5 device is running on a 12MHz internal RC.  These
+ * definitions will configure operational clocking.
+ *
+ * This is an alternative slower configuration that will produce a 48MHz USB clock
+ * with the required accuracy.  When used with OHCI, an additional requirement is
+ * the PLLACK be a multiple of 48MHz.  This setup results in a CPU clock of 384MHz.
+ *
+ *   MAINOSC:  Frequency = 12MHz (crystal)
+ *   PLLA: PLL Divider = 1, Multiplier = 64 to generate PLLACK = 768MHz
+ *   Master Clock (MCK): Source = PLLACK/2, Prescalar = 1, MDIV = 3 to generate
+ *     MCK      =  128MHz
+ *     CPU clock = 384MHz
+ */
+
+/* Main oscillator register settings.
+ *
+ *   The start up time should be should be:
+ *   Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles.
+ */
+
+#define BOARD_CKGR_MOR_MOSCXTST    (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */
+
+/* PLLA configuration.
+ *
+ *   Divider = 1
+ *   Multipler = 64
+ */
+
+#define BOARD_CKGR_PLLAR_COUNT     (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
+#define BOARD_CKGR_PLLAR_OUT       (0)
+#define BOARD_CKGR_PLLAR_MUL       (63 << PMC_CKGR_PLLAR_MUL_SHIFT)
+#define BOARD_CKGR_PLLAR_DIV       PMC_CKGR_PLLAR_DIV_BYPASS
+
+/* PMC master clock register settings.
+ *
+ *  Master/Processor Clock Source Selection = PLLA
+ *  Master/Processor Clock Prescaler        = 1
+ *  PLLA Divider                            = 2
+ *  Master Clock Division (MDIV)            = 3
+ *
+ *  NOTE: Bit PLLADIV2 must always be set to 1 when MDIV is set to 3.
+ *
+ *  Prescaler input                         = 768MHz / 2 = 384MHz
+ *  Prescaler output                        = 384MHz / 1 = 384MHz
+ *  Processor Clock (PCK)                   = 384MHz
+ *  Master clock (MCK)                      = 396MHz / 3 = 128MHz
+ */
+
+#define BOARD_PMC_MCKR_CSS         PMC_MCKR_CSS_PLLA
+#define BOARD_PMC_MCKR_PRES        PMC_MCKR_PRES_DIV1
+#define BOARD_PMC_MCKR_PLLADIV     PMC_MCKR_PLLADIV2
+#define BOARD_PMC_MCKR_MDIV        PMC_MCKR_MDIV_PCKDIV3
+
+#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
+    defined(CONFIG_SAMA5_UDPHS)
+
+/* For OHCI Full-speed operations, the user has to perform the following:
+ *
+ *   1) Enable UHP peripheral clock, bit (1 << AT91C_ID_UHPHS) in PMC_PCER
+ *      register.
+ *   2) Select PLLACK as Input clock of OHCI part, USBS bit in PMC_USB
+ *      register.
+ *   3) Program the OHCI clocks (UHP48M and UHP12M) with USBDIV field in
+ *      PMC_USB register. USBDIV value is calculated regarding the PLLACK
+ *      value and USB Full-speed accuracy.
+ *   4) Enable the OHCI clocks, UHP bit in PMC_SCER register.
+ *
+ * "The USB Host controller requires 48 MHz and 12 MHz clocks for OHCI
+ *  full-speed operations. These clocks must be generated by a PLL with a
+ *  correct accuracy of ± 0.25% thanks to USBDIV field.
+ *
+ * "Thus the USB Host peripheral receives three clocks from the Power
+ *  Management Controller (PMC): the Peripheral Clock (MCK domain), the
+ *  UHP48M and the UHP12M (built-in UHP48M divided by four) used by the
+ *  OHCI to interface with the bus USB signals (Recovered 12 MHz domain)
+ *  in Full-speed operations"
+ *
+ *  USB Clock = PLLACK / (USBDIV + 1) = 48MHz
+ *  USBDIV    = PLLACK / 48MHz - 1
+ *            = 15
+ *
+ *  The maximum value of USBDIV is 15 corresponding to a divisor of 16.
+ *  REVISIT: However, using the divisor of (15+1) yields a frame rate
+ *  of 500 frames per second.  A divisor of (7+1) gives the correct 1MS
+ *  frame rate.  I cannot explain the factor of 2 difference.
+ */
+
+#  undef  BOARD_USE_UPLL                              /* Use PLLA as source clock */
+#  define BOARD_OHCI_INPUT         PMC_USB_USBS_PLLA  /* Input is PLLACK */
+#  if 1                                               /* REVISIT */
+#    define BOARD_OHCI_DIVIDER     (7)                /* Divided by 8 */
+#  else
+#    define BOARD_OHCI_DIVIDER     (15)               /* Divided by 16 */
+#  endif
+#endif
+
+/* ADC Configuration
+ *
+ * ADCClock = MCK / ((PRESCAL+1) * 2)
+ *
+ * Given:
+ *   MCK      = 128MHz
+ *   ADCClock = 8MHz
+ * Then:
+ *   PRESCAL   = 7
+ */
+
+#define BOARD_ADC_PRESCAL          (7)
+#define BOARD_TSD_STARTUP          (40)        /* 40 nanoseconds */
+#define BOARD_TSD_TRACKTIM         (2000)      /* Min 1µs at 8MHz */
+#define BOARD_TSD_DEBOUNCE         (10000000)  /* 10 milliseconds (unis nanoseconds) */
+
+/* Resulting frequencies */
+
+#define BOARD_MAINOSC_FREQUENCY    (12000000)  /* MAINOSC: 12MHz crystal on-board */
+#define BOARD_PLLA_FREQUENCY       (768000000) /* PLLACK:  64 * 12Mhz / 1 */
+#define BOARD_PCK_FREQUENCY        (384000000) /* CPU:     PLLACK / 2 / 1  */
+#define BOARD_MCK_FREQUENCY        (128000000) /* MCK:     PLLACK / 2 / 1 / 3 */
+#define BOARD_ADCCLK_FREQUENCY     (8000000)   /* ADCCLK:  MCK / ((7+1)*2) */
+
+/* HSMCI clocking
+ *
+ * Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
+ * divided by (2*(CLKDIV) + CLOCKODD + 2).
+ *
+ *   MCI_SPEED = MCK / (2*CLKDIV + CLOCKODD + 2)
+ *
+ * Where CLKDIV has a range of 0-255.
+ */
+
+/* MCK = 128MHz, CLKDIV = 159, MCI_SPEED = 128MHz / (2*159 + 0 + 2) = 400 KHz */
+
+#define HSMCI_INIT_CLKDIV          (159 << HSMCI_MR_CLKDIV_SHIFT)
+
+/* MCK = 128MHz, CLKDIV = 2 w/CLOCKODD, MCI_SPEED = 128MHz /(2*2 + 1 + 2) = 18.3 MHz */
+
+#define HSMCI_MMCXFR_CLKDIV        ((2 << HSMCI_MR_CLKDIV_SHIFT) | HSMCI_MR_CLKODD)
+
+/* MCK = 128MHz, CLKDIV = 2, MCI_SPEED = 128MHz /(2*2 + 0 + 2) = 21.3 MHz */
+
+#define HSMCI_SDXFR_CLKDIV         (2 << HSMCI_MR_CLKDIV_SHIFT)
+#define HSMCI_SDWIDEXFR_CLKDIV     HSMCI_SDXFR_CLKDIV
+
+/* FLASH wait states
+ *
+ * FWS Max frequency
+ *     1.62V 1.8V
+ * --- ----- ------
+ *  0  24MHz 27MHz
+ *  1  40MHz 47MHz
+ *  2  72MHz 84MHz
+ *  3  84MHz 96MHz
+ */
+
+#define BOARD_FWS                  3
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+
+ #undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* !__ASSEMBLY__ */
+#endif  /* __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_384MHZ_H */
diff --git a/nuttx/configs/sama5d3-xplained/include/board_396mhz.h b/nuttx/configs/sama5d3-xplained/include/board_396mhz.h
new file mode 100644
index 000000000..9882ff1fb
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/include/board_396mhz.h
@@ -0,0 +1,221 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/include/board_396mhz.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_396MHZ_H
+#define __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_396MHZ_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/* Clocking *************************************************************************/
+/* After power-on reset, the SAMA5 device is running on a 12MHz internal RC.  These
+ * definitions will configure operational clocking.
+ *
+ * This is the configuration provided in the Atmel example code.  This results in a
+ * CPU clock of 396MHz:
+ *
+ *   MAINOSC:  Frequency = 12MHz (crystal)
+ *   PLLA: PLL Divider = 1, Multiplier = 66 to generate PLLACK = 792MHz
+ *   Master Clock (MCK): Source = PLLACK/2, Prescalar = 1, MDIV = 3 to generate
+ *     MCK      =  132MHz
+ *     CPU clock = 396MHz
+ */
+
+/* Main oscillator register settings.
+ *
+ *   The start up time should be should be:
+ *   Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles.
+ */
+
+#define BOARD_CKGR_MOR_MOSCXTST    (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */
+
+/* PLLA configuration.
+ *
+ *   Divider = 1
+ *   Multipler = 66
+ */
+
+#define BOARD_CKGR_PLLAR_COUNT     (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
+#define BOARD_CKGR_PLLAR_OUT       (0)
+#define BOARD_CKGR_PLLAR_MUL       (65 << PMC_CKGR_PLLAR_MUL_SHIFT)
+#define BOARD_CKGR_PLLAR_DIV       PMC_CKGR_PLLAR_DIV_BYPASS
+
+/* PMC master clock register settings.
+ *
+ *  Master/Processor Clock Source Selection = PLLA
+ *  Master/Processor Clock Prescaler        = 1
+ *  PLLA Divider                            = 2
+ *  Master Clock Division (MDIV)            = 3
+ *
+ *  NOTE: Bit PLLADIV2 must always be set to 1 when MDIV is set to 3.
+ *
+ *  Prescaler input                         = 792MHz / 2 = 396MHz
+ *  Prescaler output                        = 396MHz / 1 = 396MHz
+ *  Processor Clock (PCK)                   = 396MHz
+ *  Master clock (MCK)                      = 396MHz / 3 = 132MHz
+ */
+
+#define BOARD_PMC_MCKR_CSS         PMC_MCKR_CSS_PLLA
+#define BOARD_PMC_MCKR_PRES        PMC_MCKR_PRES_DIV1
+#define BOARD_PMC_MCKR_PLLADIV     PMC_MCKR_PLLADIV2
+#define BOARD_PMC_MCKR_MDIV        PMC_MCKR_MDIV_PCKDIV3
+
+/* ADC Configuration
+ *
+ * ADCClock = MCK / ((PRESCAL+1) * 2)
+ *
+ * Given:
+ *   MCK      = 132MHz
+ *   ADCClock = 8MHz
+ * Then:
+ *   PRESCAL  = 7.25
+ *
+ * PRESCAL=7 and MCK=132MHz yields ADC clock of 8.25MHz
+ */
+
+#define BOARD_ADC_PRESCAL          (7)
+#define BOARD_TSD_STARTUP          (40)        /* 40 nanoseconds */
+#define BOARD_TSD_TRACKTIM         (2000)      /* Min 1µs at 8MHz */
+#define BOARD_TSD_DEBOUNCE         (10000000)  /* 10 milliseconds (unis nanoseconds) */
+
+/* Resulting frequencies */
+
+#define BOARD_MAINOSC_FREQUENCY    (12000000)  /* MAINOSC: 12MHz crystal on-board */
+#define BOARD_PLLA_FREQUENCY       (792000000) /* PLLACK:  66 * 12Mhz / 1 */
+#define BOARD_PCK_FREQUENCY        (396000000) /* CPU:     PLLACK / 2 / 1  */
+#define BOARD_MCK_FREQUENCY        (132000000) /* MCK:     PLLACK / 2 / 1 / 3 */
+#define BOARD_ADCCLK_FREQUENCY     (8250000)   /* ADCCLK:  MCK / ((7+1)*2) */
+
+#if defined(CONFIG_SAMA5_EHCI) || defined(CONFIG_SAMA5_OHCI) || \
+    defined(CONFIG_SAMA5_UDPHS)
+
+/* The USB Host High Speed requires a 480 MHz clock (UPLLCK) for the embedded
+ * High-speed transceivers. UPLLCK is the output of the 480 MHz UTMI PLL
+ * (UPLL).  The source clock of the UTMI PLL is the Main OSC output:  Either
+ * the 12MHz internal RC oscillator on a an external 12MHz crystal.  The
+ * Main OSC must be 12MHz because the UPLL has a built-in 40x multiplier.
+ *
+ * For High-speed operations, the user has to perform the following:
+ *
+ *   1) Enable UHP peripheral clock, bit (1 << AT91C_ID_UHPHS) in
+ *      PMC_PCER register.
+ *   2) Write CKGR_PLLCOUNT field in PMC_UCKR register.
+ *   3) Enable UPLL, bit AT91C_CKGR_UPLLEN in PMC_UCKR register.
+ *   4) Wait until UTMI_PLL is locked. LOCKU bit in PMC_SR register
+ *   5) Enable BIAS, bit AT91C_CKGR_BIASEN in PMC_UCKR register.
+ *   6) Select UPLLCK as Input clock of OHCI part, USBS bit in PMC_USB
+ *      register.
+ *   7) Program the OHCI clocks (UHP48M and UHP12M) with USBDIV field in
+ *      PMC_USB register. USBDIV must be 9 (division by 10) if UPLLCK is
+ *      selected.
+ *   8) Enable OHCI clocks, UHP bit in PMC_SCER register.
+ *
+ * Steps 2 through 7 performed here.  1 and 8 are performed in the EHCI
+ * driver is initialized.
+ */
+
+#  define BOARD_USE_UPLL             1     /* Use UPLL for clock source */
+#  define BOARD_CKGR_UCKR_UPLLCOUNT  (15)  /* Maximum value */
+#  define BOARD_CKGR_UCKR_BIASCOUNT  (15)  /* Maximum value */
+#endif
+
+/* HSMCI clocking
+ *
+ * Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
+ * divided by (2*(CLKDIV) + CLOCKODD + 2).
+ *
+ *   MCI_SPEED = MCK / (2*CLKDIV + CLOCKODD + 2)
+ *
+ * Where CLKDIV has a range of 0-255.
+ */
+
+/* MCK = 132MHz, CLKDIV = 164, MCI_SPEED = 132MHz / (2*164 + 0 + 2) = 400 KHz */
+
+#define HSMCI_INIT_CLKDIV          (164 << HSMCI_MR_CLKDIV_SHIFT)
+
+/* MCK = 132MHz, CLKDIV = 2 w/CLOCKODD, MCI_SPEED = 132MHz /(2*2 + 1 + 2) = 18.9 MHz */
+
+#define HSMCI_MMCXFR_CLKDIV        ((2 << HSMCI_MR_CLKDIV_SHIFT) | HSMCI_MR_CLKODD)
+
+/* MCK = 132MHz, CLKDIV = 2, MCI_SPEED = 132MHz /(2*2 + 0 + 2) = 22 MHz */
+
+#define HSMCI_SDXFR_CLKDIV         (2 << HSMCI_MR_CLKDIV_SHIFT)
+#define HSMCI_SDWIDEXFR_CLKDIV     HSMCI_SDXFR_CLKDIV
+
+/* FLASH wait states
+ *
+ * FWS Max frequency
+ *     1.62V 1.8V
+ * --- ----- ------
+ *  0  24MHz 27MHz
+ *  1  40MHz 47MHz
+ *  2  72MHz 84MHz
+ *  3  84MHz 96MHz
+ */
+
+#define BOARD_FWS                  3
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* !__ASSEMBLY__ */
+#endif  /* __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_396MHZ_H */
diff --git a/nuttx/configs/sama5d3-xplained/include/board_memorymap.h b/nuttx/configs/sama5d3-xplained/include/board_memorymap.h
new file mode 100644
index 000000000..bb39b72df
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/include/board_memorymap.h
@@ -0,0 +1,73 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/include/board_memorymap.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_MEMORYMAP_H
+#define __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_MEMORYMAP_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif  /* __CONFIGS_SAMA5D3_XPLAINED_INCLUDE_BOARD_MEMORYMAP_H */
diff --git a/nuttx/configs/sama5d3-xplained/norboot/Make.defs b/nuttx/configs/sama5d3-xplained/norboot/Make.defs
new file mode 100644
index 000000000..c9e67ca9f
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/norboot/Make.defs
@@ -0,0 +1,146 @@
+############################################################################
+# configs/sama5d3-xplained/norboot/Make.defs
+#
+#   Copyright (C) 2014-2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}$(DELIM)arch$(DELIM)arm$(DELIM)src$(DELIM)armv7-a$(DELIM)Toolchain.defs
+
+ifeq ($(CONFIG_SAMA5_BOOT_ISRAM),y)
+  LDSCRIPT = isram.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_SDRAM),y)
+  LDSCRIPT = ddram.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS0FLASH),y)
+ifeq ($(CONFIG_BOOT_SDRAM_DATA),y)
+  LDSCRIPT = nor-ddram.ld
+else
+  LDSCRIPT = nor-isram.ld
+endif
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS1FLASH),y)
+#  LDSCRIPT = cs1flash.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS2FLASH),y)
+#  LDSCRIPT = cs2flash.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS3FLASH),y)
+#  LDSCRIPT = cs3flash.ld
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include}"
+  ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include}" -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include$(DELIM)cxx}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)$(DELIM)configs$(DELIM)$(CONFIG_ARCH_BOARD)$(DELIM)scripts$(DELIM)$(LDSCRIPT)}"
+else
+  # Linux/Cygwin-native toolchain
+  ARCHINCLUDES = -I. -isystem $(TOPDIR)$(DELIM)include
+  ARCHXXINCLUDES = -I. -isystem $(TOPDIR)$(DELIM)include -isystem $(TOPDIR)$(DELIM)include$(DELIM)cxx
+  ARCHSCRIPT = -T$(TOPDIR)$(DELIM)configs$(DELIM)$(CONFIG_ARCH_BOARD)$(DELIM)scripts$(DELIM)$(LDSCRIPT)
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION = -g
+endif
+
+ifneq ($(CONFIG_DEBUG_NOOPT),y)
+  ARCHOPTIMIZATION += $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCPUFLAGS = -mcpu=cortex-a5 -mfpu=vfpv4-d16
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fno-rtti
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX = -Wall -Wshadow
+ARCHDEFINES =
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS = $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+ifneq ($(CROSSDEV),arm-nuttx-elf-)
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  LDFLAGS += -g
+endif
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
+HOSTLDFLAGS =
+ifeq ($(CONFIG_HOST_WINDOWS),y)
+  HOSTEXEEXT = .exe
+else
+  HOSTEXEEXT =
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native host tools
+  DIRLINK = $(TOPDIR)$(DELIM)tools$(DELIM)copydir.sh
+  DIRUNLINK = $(TOPDIR)$(DELIM)tools$(DELIM)unlink.sh
+  MKDEP = $(TOPDIR)$(DELIM)tools$(DELIM)mknulldeps.sh
+else
+  # Linux/Cygwin-native host tools 
+  MKDEP = $(TOPDIR)$(DELIM)tools$(DELIM)mkdeps$(HOSTEXEEXT)
+endif
+
diff --git a/nuttx/configs/sama5d3-xplained/norboot/defconfig b/nuttx/configs/sama5d3-xplained/norboot/defconfig
new file mode 100644
index 000000000..c935b4873
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/norboot/defconfig
@@ -0,0 +1,736 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Nuttx/ Configuration
+#
+
+#
+# Build Setup
+#
+# CONFIG_EXPERIMENTAL is not set
+# CONFIG_DEFAULT_SMALL is not set
+# CONFIG_HOST_LINUX is not set
+# CONFIG_HOST_OSX is not set
+CONFIG_HOST_WINDOWS=y
+# CONFIG_HOST_OTHER is not set
+# CONFIG_WINDOWS_NATIVE is not set
+CONFIG_WINDOWS_CYGWIN=y
+# CONFIG_WINDOWS_MSYS is not set
+# CONFIG_WINDOWS_OTHER is not set
+
+#
+# Build Configuration
+#
+# CONFIG_APPS_DIR="../apps"
+# CONFIG_BUILD_2PASS is not set
+
+#
+# Binary Output Formats
+#
+# CONFIG_RRLOAD_BINARY is not set
+CONFIG_INTELHEX_BINARY=y
+# CONFIG_MOTOROLA_SREC is not set
+CONFIG_RAW_BINARY=y
+
+#
+# Customize Header Files
+#
+# CONFIG_ARCH_STDINT_H is not set
+# CONFIG_ARCH_STDBOOL_H is not set
+# CONFIG_ARCH_MATH_H is not set
+# CONFIG_ARCH_FLOAT_H is not set
+# CONFIG_ARCH_STDARG_H is not set
+
+#
+# Debug Options
+#
+# CONFIG_DEBUG is not set
+CONFIG_ARCH_HAVE_STACKCHECK=y
+# CONFIG_ARCH_HAVE_HEAPCHECK is not set
+# CONFIG_DEBUG_SYMBOLS is not set
+CONFIG_ARCH_HAVE_CUSTOMOPT=y
+# CONFIG_DEBUG_NOOPT is not set
+# CONFIG_DEBUG_CUSTOMOPT is not set
+CONFIG_DEBUG_FULLOPT=y
+
+#
+# System Type
+#
+# CONFIG_ARCH_8051 is not set
+CONFIG_ARCH_ARM=y
+# CONFIG_ARCH_AVR is not set
+# CONFIG_ARCH_HC is not set
+# CONFIG_ARCH_MIPS is not set
+# CONFIG_ARCH_RGMP is not set
+# CONFIG_ARCH_SH is not set
+# CONFIG_ARCH_SIM is not set
+# CONFIG_ARCH_X86 is not set
+# CONFIG_ARCH_Z16 is not set
+# CONFIG_ARCH_Z80 is not set
+CONFIG_ARCH="arm"
+
+#
+# ARM Options
+#
+# CONFIG_ARCH_CHIP_A1X is not set
+# CONFIG_ARCH_CHIP_C5471 is not set
+# CONFIG_ARCH_CHIP_CALYPSO is not set
+# CONFIG_ARCH_CHIP_DM320 is not set
+# CONFIG_ARCH_CHIP_IMX is not set
+# CONFIG_ARCH_CHIP_KINETIS is not set
+# CONFIG_ARCH_CHIP_KL is not set
+# CONFIG_ARCH_CHIP_LM is not set
+# CONFIG_ARCH_CHIP_TIVA is not set
+# CONFIG_ARCH_CHIP_LPC17XX is not set
+# CONFIG_ARCH_CHIP_LPC214X is not set
+# CONFIG_ARCH_CHIP_LPC2378 is not set
+# CONFIG_ARCH_CHIP_LPC31XX is not set
+# CONFIG_ARCH_CHIP_LPC43XX is not set
+# CONFIG_ARCH_CHIP_NUC1XX is not set
+CONFIG_ARCH_CHIP_SAMA5=y
+# CONFIG_ARCH_CHIP_SAMD is not set
+# CONFIG_ARCH_CHIP_SAM34 is not set
+# CONFIG_ARCH_CHIP_STM32 is not set
+# CONFIG_ARCH_CHIP_STR71X is not set
+# CONFIG_ARCH_ARM7TDMI is not set
+# CONFIG_ARCH_ARM926EJS is not set
+# CONFIG_ARCH_ARM920T is not set
+# CONFIG_ARCH_CORTEXM0 is not set
+# CONFIG_ARCH_CORTEXM3 is not set
+# CONFIG_ARCH_CORTEXM4 is not set
+CONFIG_ARCH_CORTEXA5=y
+# CONFIG_ARCH_CORTEXA8 is not set
+CONFIG_ARCH_FAMILY="armv7-a"
+CONFIG_ARCH_CHIP="sama5"
+CONFIG_ARCH_HAVE_FPU=y
+CONFIG_ARCH_FPU=y
+# CONFIG_ARCH_HAVE_MPU is not set
+CONFIG_ARCH_HAVE_LOWVECTORS=y
+CONFIG_ARCH_LOWVECTORS=y
+# CONFIG_ARCH_ROMPGTABLE is not set
+
+#
+# ARMv7-A Configuration Options
+#
+# CONFIG_ARMV7A_TOOLCHAIN_BUILDROOT is not set
+CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y
+# CONFIG_ARMV7A_TOOLCHAIN_DEVKITARM is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIL is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_OABI is not set
+
+#
+# SAMA5 Configuration Options
+#
+CONFIG_SAMA5_HAVE_UART0=y
+CONFIG_SAMA5_HAVE_UART1=y
+CONFIG_SAMA5_HAVE_CAN0=y
+CONFIG_SAMA5_HAVE_CAN1=y
+CONFIG_SAMA5_HAVE_LCDC=y
+CONFIG_SAMA5_HAVE_GMAC=y
+CONFIG_SAMA5_HAVE_EMAC=y
+CONFIG_SAMA5_HAVE_HSMCI2=y
+CONFIG_SAMA5_HAVE_TC1=y
+# CONFIG_ARCH_CHIP_ATSAMA5D31 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D33 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D34 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D35 is not set
+CONFIG_ARCH_CHIP_ATSAMA5D36=y
+
+#
+# SAMA5 Peripheral Support
+#
+# CONFIG_SAMA5_DBGU is not set
+# CONFIG_SAMA5_PIT is not set
+# CONFIG_SAMA5_WDT is not set
+# CONFIG_SAMA5_RTC is not set
+CONFIG_SAMA5_HSMC=y
+# CONFIG_SAMA5_SMD is not set
+# CONFIG_SAMA5_UART0 is not set
+# CONFIG_SAMA5_UART1 is not set
+# CONFIG_SAMA5_USART0 is not set
+CONFIG_SAMA5_USART1=y
+# CONFIG_SAMA5_USART2 is not set
+# CONFIG_SAMA5_USART3 is not set
+# CONFIG_SAMA5_TWI0 is not set
+# CONFIG_SAMA5_TWI1 is not set
+# CONFIG_SAMA5_TWI2 is not set
+# CONFIG_SAMA5_HSMCI0 is not set
+# CONFIG_SAMA5_HSMCI1 is not set
+# CONFIG_SAMA5_HSMCI2 is not set
+# CONFIG_SAMA5_SPI0 is not set
+# CONFIG_SAMA5_SPI1 is not set
+# CONFIG_SAMA5_TC0 is not set
+# CONFIG_SAMA5_TC1 is not set
+# CONFIG_SAMA5_PWM is not set
+# CONFIG_SAMA5_ADC is not set
+# CONFIG_SAMA5_DMAC0 is not set
+# CONFIG_SAMA5_DMAC1 is not set
+# CONFIG_SAMA5_UHPHS is not set
+# CONFIG_SAMA5_UDPHS is not set
+# CONFIG_SAMA5_GMAC is not set
+# CONFIG_SAMA5_EMAC is not set
+# CONFIG_SAMA5_LCDC is not set
+# CONFIG_SAMA5_ISI is not set
+# CONFIG_SAMA5_CAN0 is not set
+# CONFIG_SAMA5_CAN1 is not set
+# CONFIG_SAMA5_SHA is not set
+# CONFIG_SAMA5_AES is not set
+# CONFIG_SAMA5_TDES is not set
+# CONFIG_SAMA5_TRNG is not set
+# CONFIG_SAMA5_ARM is not set
+# CONFIG_SAMA5_FUSE is not set
+# CONFIG_SAMA5_MPDDRC is not set
+# CONFIG_SAMA5_PIO_IRQ is not set
+
+#
+# External Memory Configuration
+#
+CONFIG_SAMA5_EBICS0=y
+CONFIG_SAMA5_EBICS0_SIZE=134217728
+# CONFIG_SAMA5_EBICS0_SRAM is not set
+# CONFIG_SAMA5_EBICS0_PSRAM is not set
+# CONFIG_SAMA5_EBICS0_PROM is not set
+# CONFIG_SAMA5_EBICS0_EEPROM is not set
+# CONFIG_SAMA5_EBICS0_EPROM is not set
+# CONFIG_SAMA5_EBICS0_LCD is not set
+CONFIG_SAMA5_EBICS0_NOR=y
+# CONFIG_SAMA5_EBICS1 is not set
+# CONFIG_SAMA5_EBICS2 is not set
+# CONFIG_SAMA5_EBICS3 is not set
+# CONFIG_SAMA5_HAVE_NAND is not set
+# CONFIG_SAMA5_HAVE_PMECC is not set
+CONFIG_SAMA5_BOOT_ISRAM=y
+# CONFIG_SAMA5_BOOT_CS0FLASH is not set
+
+#
+# Heap Configuration
+#
+
+#
+# Architecture Options
+#
+# CONFIG_ARCH_NOINTC is not set
+# CONFIG_ARCH_VECNOTIRQ is not set
+# CONFIG_ARCH_DMA is not set
+CONFIG_ARCH_HAVE_IRQPRIO=y
+# CONFIG_CUSTOM_STACK is not set
+# CONFIG_ADDRENV is not set
+CONFIG_ARCH_HAVE_VFORK=y
+CONFIG_ARCH_HAVE_MMU=y
+CONFIG_ARCH_NAND_HWECC=y
+# CONFIG_PAGING is not set
+CONFIG_ARCH_IRQPRIO=y
+CONFIG_ARCH_STACKDUMP=y
+# CONFIG_ENDIAN_BIG is not set
+# CONFIG_ARCH_IDLE_CUSTOM is not set
+# CONFIG_ARCH_HAVE_RAMFUNCS is not set
+# CONFIG_ARCH_HAVE_RAMVECTORS is not set
+
+#
+# Board Settings
+#
+CONFIG_BOARD_LOOPSPERMSEC=49341
+# CONFIG_ARCH_CALIBRATION is not set
+
+#
+# Interrupt options
+#
+CONFIG_ARCH_HAVE_INTERRUPTSTACK=y
+CONFIG_ARCH_INTERRUPTSTACK=0
+# CONFIG_ARCH_HAVE_HIPRI_INTERRUPT is not set
+
+#
+# Boot options
+#
+# CONFIG_BOOT_RUNFROMEXTSRAM is not set
+# CONFIG_BOOT_RUNFROMFLASH is not set
+CONFIG_BOOT_RUNFROMISRAM=y
+# CONFIG_BOOT_RUNFROMSDRAM is not set
+# CONFIG_BOOT_COPYTORAM is not set
+
+#
+# Boot Memory Configuration
+#
+CONFIG_RAM_START=0x00300000
+CONFIG_RAM_VSTART=0x00300000
+CONFIG_RAM_SIZE=114688
+# CONFIG_ARCH_HAVE_SDRAM is not set
+
+#
+# Board Selection
+#
+CONFIG_ARCH_BOARD_SAMA5D3_XPLAINED=y
+# CONFIG_ARCH_BOARD_CUSTOM is not set
+CONFIG_ARCH_BOARD="sama5d3-xplained"
+
+#
+# Common Board Options
+#
+CONFIG_ARCH_HAVE_LEDS=y
+CONFIG_ARCH_LEDS=y
+CONFIG_ARCH_HAVE_BUTTONS=y
+# CONFIG_ARCH_BUTTONS is not set
+CONFIG_ARCH_HAVE_IRQBUTTONS=y
+
+#
+# Board-Specific Options
+#
+CONFIG_SAMA5D3XPLAINED_NOR_MAIN=y
+# CONFIG_SAMA5D3XPLAINED_NOR_START is not set
+
+#
+# RTOS Features
+#
+# CONFIG_BOARD_INITIALIZE is not set
+CONFIG_MSEC_PER_TICK=10
+# CONFIG_SYSTEM_TIME64 is not set
+CONFIG_RR_INTERVAL=200
+# CONFIG_SCHED_CPULOAD is not set
+# CONFIG_SCHED_INSTRUMENTATION is not set
+CONFIG_TASK_NAME_SIZE=0
+# CONFIG_SCHED_HAVE_PARENT is not set
+# CONFIG_JULIAN_TIME is not set
+CONFIG_START_YEAR=2014
+CONFIG_START_MONTH=7
+CONFIG_START_DAY=29
+CONFIG_DEV_CONSOLE=y
+# CONFIG_MUTEX_TYPES is not set
+# CONFIG_PRIORITY_INHERITANCE is not set
+# CONFIG_FDCLONE_DISABLE is not set
+# CONFIG_FDCLONE_STDIO is not set
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SCHED_WAITPID=y
+# CONFIG_SCHED_STARTHOOK is not set
+# CONFIG_SCHED_ATEXIT is not set
+# CONFIG_SCHED_ONEXIT is not set
+CONFIG_USER_ENTRYPOINT="nor_main"
+CONFIG_DISABLE_OS_API=y
+# CONFIG_DISABLE_CLOCK is not set
+# CONFIG_DISABLE_POSIX_TIMERS is not set
+# CONFIG_DISABLE_PTHREAD is not set
+# CONFIG_DISABLE_SIGNALS is not set
+# CONFIG_DISABLE_MQUEUE is not set
+CONFIG_DISABLE_ENVIRON=y
+
+#
+# Signal Numbers
+#
+CONFIG_SIG_SIGUSR1=1
+CONFIG_SIG_SIGUSR2=2
+CONFIG_SIG_SIGALARM=3
+CONFIG_SIG_SIGCONDTIMEDOUT=16
+
+#
+# Sizes of configurable things (0 disables)
+#
+CONFIG_MAX_TASKS=16
+CONFIG_MAX_TASK_ARGS=4
+CONFIG_NPTHREAD_KEYS=4
+CONFIG_NFILE_DESCRIPTORS=8
+CONFIG_NFILE_STREAMS=8
+CONFIG_NAME_MAX=32
+CONFIG_PREALLOC_MQ_MSGS=4
+CONFIG_MQ_MAXMSGSIZE=32
+CONFIG_MAX_WDOGPARMS=2
+CONFIG_PREALLOC_WDOGS=4
+CONFIG_PREALLOC_TIMERS=4
+
+#
+# Stack and heap information
+#
+CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=2048
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=2048
+
+#
+# Device Drivers
+#
+CONFIG_DISABLE_POLL=y
+CONFIG_DEV_NULL=y
+# CONFIG_DEV_ZERO is not set
+# CONFIG_LOOP is not set
+# CONFIG_RAMDISK is not set
+# CONFIG_CAN is not set
+# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
+# CONFIG_PWM is not set
+# CONFIG_ARCH_HAVE_I2CRESET is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+# CONFIG_I2S is not set
+# CONFIG_RTC is not set
+# CONFIG_WATCHDOG is not set
+# CONFIG_ANALOG is not set
+# CONFIG_AUDIO_DEVICES is not set
+# CONFIG_VIDEO_DEVICES is not set
+# CONFIG_BCH is not set
+# CONFIG_INPUT is not set
+# CONFIG_LCD is not set
+# CONFIG_MMCSD is not set
+# CONFIG_MTD is not set
+# CONFIG_PIPES is not set
+# CONFIG_PM is not set
+# CONFIG_POWER is not set
+# CONFIG_SENSORS is not set
+# CONFIG_SERCOMM_CONSOLE is not set
+CONFIG_SERIAL=y
+CONFIG_DEV_LOWCONSOLE=y
+# CONFIG_16550_UART is not set
+# CONFIG_ARCH_HAVE_UART is not set
+# CONFIG_ARCH_HAVE_UART0 is not set
+# CONFIG_ARCH_HAVE_UART1 is not set
+# CONFIG_ARCH_HAVE_UART2 is not set
+# CONFIG_ARCH_HAVE_UART3 is not set
+# CONFIG_ARCH_HAVE_UART4 is not set
+# CONFIG_ARCH_HAVE_UART5 is not set
+# CONFIG_ARCH_HAVE_UART6 is not set
+# CONFIG_ARCH_HAVE_UART7 is not set
+# CONFIG_ARCH_HAVE_UART8 is not set
+# CONFIG_ARCH_HAVE_SCI0 is not set
+# CONFIG_ARCH_HAVE_SCI1 is not set
+# CONFIG_ARCH_HAVE_USART0 is not set
+CONFIG_ARCH_HAVE_USART1=y
+# CONFIG_ARCH_HAVE_USART2 is not set
+# CONFIG_ARCH_HAVE_USART3 is not set
+# CONFIG_ARCH_HAVE_USART4 is not set
+# CONFIG_ARCH_HAVE_USART5 is not set
+# CONFIG_ARCH_HAVE_USART6 is not set
+# CONFIG_ARCH_HAVE_USART7 is not set
+# CONFIG_ARCH_HAVE_USART8 is not set
+
+#
+# USART Configuration
+#
+CONFIG_USART1_ISUART=y
+CONFIG_MCU_SERIAL=y
+CONFIG_USART1_SERIAL_CONSOLE=y
+# CONFIG_NO_SERIAL_CONSOLE is not set
+
+#
+# USART1 Configuration
+#
+CONFIG_USART1_RXBUFSIZE=256
+CONFIG_USART1_TXBUFSIZE=256
+CONFIG_USART1_BAUD=115200
+CONFIG_USART1_BITS=8
+CONFIG_USART1_PARITY=0
+CONFIG_USART1_2STOP=0
+# CONFIG_USART1_IFLOWCONTROL is not set
+# CONFIG_USART1_OFLOWCONTROL is not set
+# CONFIG_SERIAL_IFLOWCONTROL is not set
+# CONFIG_SERIAL_OFLOWCONTROL is not set
+# CONFIG_USBDEV is not set
+# CONFIG_USBHOST is not set
+# CONFIG_WIRELESS is not set
+
+#
+# System Logging Device Options
+#
+
+#
+# System Logging
+#
+# CONFIG_RAMLOG is not set
+
+#
+# Networking Support
+#
+# CONFIG_ARCH_HAVE_NET is not set
+# CONFIG_ARCH_HAVE_PHY is not set
+# CONFIG_NET is not set
+
+#
+# File Systems
+#
+
+#
+# File system configuration
+#
+CONFIG_DISABLE_MOUNTPOINT=y
+# CONFIG_DISABLE_PSEUDOFS_OPERATIONS is not set
+# CONFIG_FS_READABLE is not set
+# CONFIG_FS_WRITABLE is not set
+# CONFIG_FS_RAMMAP is not set
+# CONFIG_FS_PROCFS is not set
+
+#
+# System Logging
+#
+# CONFIG_SYSLOG_ENABLE is not set
+# CONFIG_SYSLOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_NX is not set
+
+#
+# Memory Management
+#
+# CONFIG_MM_MULTIHEAP is not set
+# CONFIG_MM_SMALL is not set
+CONFIG_MM_REGIONS=1
+# CONFIG_ARCH_HAVE_HEAP2 is not set
+# CONFIG_GRAN is not set
+
+#
+# Audio Support
+#
+# CONFIG_AUDIO is not set
+
+#
+# Binary Formats
+#
+# CONFIG_BINFMT_DISABLE is not set
+# CONFIG_NXFLAT is not set
+# CONFIG_ELF is not set
+# CONFIG_BUILTIN is not set
+# CONFIG_PIC is not set
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+
+#
+# Library Routines
+#
+
+#
+# Standard C Library Options
+#
+CONFIG_STDIO_BUFFER_SIZE=64
+CONFIG_STDIO_LINEBUFFER=y
+CONFIG_NUNGET_CHARS=2
+# CONFIG_LIBM is not set
+# CONFIG_NOPRINTF_FIELDWIDTH is not set
+# CONFIG_LIBC_FLOATINGPOINT is not set
+CONFIG_LIB_RAND_ORDER=1
+# CONFIG_EOL_IS_CR is not set
+# CONFIG_EOL_IS_LF is not set
+# CONFIG_EOL_IS_BOTH_CRLF is not set
+CONFIG_EOL_IS_EITHER_CRLF=y
+# CONFIG_LIBC_EXECFUNCS is not set
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
+CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=2048
+# CONFIG_LIBC_STRERROR is not set
+# CONFIG_LIBC_PERROR_STDOUT is not set
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_LIB_SENDFILE_BUFSIZE=512
+# CONFIG_ARCH_ROMGETC is not set
+# CONFIG_ARCH_OPTIMIZED_FUNCTIONS is not set
+
+#
+# Non-standard Library Support
+#
+# CONFIG_SCHED_WORKQUEUE is not set
+# CONFIG_LIB_KBDCODEC is not set
+# CONFIG_LIB_SLCDCODEC is not set
+
+#
+# Basic CXX Support
+#
+# CONFIG_C99_BOOL8 is not set
+# CONFIG_HAVE_CXX is not set
+
+#
+# Application Configuration
+#
+
+#
+# Built-In Applications
+#
+
+#
+# Examples
+#
+# CONFIG_EXAMPLES_BUTTONS is not set
+# CONFIG_EXAMPLES_CAN is not set
+# CONFIG_EXAMPLES_CONFIGDATA is not set
+# CONFIG_EXAMPLES_DHCPD is not set
+# CONFIG_EXAMPLES_ELF is not set
+# CONFIG_EXAMPLES_FTPC is not set
+# CONFIG_EXAMPLES_FTPD is not set
+CONFIG_EXAMPLES_HELLO=y
+# CONFIG_EXAMPLES_HELLOXX is not set
+# CONFIG_EXAMPLES_JSON is not set
+# CONFIG_EXAMPLES_HIDKBD is not set
+# CONFIG_EXAMPLES_KEYPADTEST is not set
+# CONFIG_EXAMPLES_IGMP is not set
+# CONFIG_EXAMPLES_MM is not set
+# CONFIG_EXAMPLES_MODBUS is not set
+# CONFIG_EXAMPLES_MOUNT is not set
+# CONFIG_EXAMPLES_NRF24L01TERM is not set
+# CONFIG_EXAMPLES_NSH is not set
+# CONFIG_EXAMPLES_NULL is not set
+# CONFIG_EXAMPLES_NX is not set
+# CONFIG_EXAMPLES_NXCONSOLE is not set
+# CONFIG_EXAMPLES_NXFFS is not set
+# CONFIG_EXAMPLES_NXFLAT is not set
+# CONFIG_EXAMPLES_NXHELLO is not set
+# CONFIG_EXAMPLES_NXIMAGE is not set
+# CONFIG_EXAMPLES_NXLINES is not set
+# CONFIG_EXAMPLES_NXTEXT is not set
+# CONFIG_EXAMPLES_OSTEST is not set
+# CONFIG_EXAMPLES_PASHELLO is not set
+# CONFIG_EXAMPLES_PIPE is not set
+# CONFIG_EXAMPLES_POLL is not set
+# CONFIG_EXAMPLES_POSIXSPAWN is not set
+# CONFIG_EXAMPLES_QENCODER is not set
+# CONFIG_EXAMPLES_RGMP is not set
+# CONFIG_EXAMPLES_ROMFS is not set
+# CONFIG_EXAMPLES_SENDMAIL is not set
+# CONFIG_EXAMPLES_SERLOOP is not set
+# CONFIG_EXAMPLES_SLCD is not set
+# CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_TCPECHO is not set
+# CONFIG_EXAMPLES_TELNETD is not set
+# CONFIG_EXAMPLES_THTTPD is not set
+# CONFIG_EXAMPLES_TIFF is not set
+# CONFIG_EXAMPLES_TOUCHSCREEN is not set
+# CONFIG_EXAMPLES_UDP is not set
+# CONFIG_EXAMPLES_UIP is not set
+# CONFIG_EXAMPLES_USBSERIAL is not set
+# CONFIG_EXAMPLES_USBTERM is not set
+# CONFIG_EXAMPLES_WATCHDOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_TIFF is not set
+
+#
+# Interpreters
+#
+# CONFIG_INTERPRETERS_FICL is not set
+# CONFIG_INTERPRETERS_PCODE is not set
+
+#
+# Network Utilities
+#
+
+#
+# Networking Utilities
+#
+# CONFIG_NETUTILS_CODECS is not set
+# CONFIG_NETUTILS_DHCPD is not set
+# CONFIG_NETUTILS_FTPC is not set
+# CONFIG_NETUTILS_FTPD is not set
+# CONFIG_NETUTILS_JSON is not set
+# CONFIG_NETUTILS_SMTP is not set
+# CONFIG_NETUTILS_TFTPC is not set
+# CONFIG_NETUTILS_THTTPD is not set
+# CONFIG_NETUTILS_UIPLIB is not set
+# CONFIG_NETUTILS_WEBCLIENT is not set
+
+#
+# FreeModBus
+#
+# CONFIG_MODBUS is not set
+
+#
+# NSH Library
+#
+# CONFIG_NSH_LIBRARY is not set
+
+#
+# NxWidgets/NxWM
+#
+
+#
+# Platform-specific Support
+#
+# CONFIG_PLATFORM_CONFIGDATA is not set
+
+#
+# System Libraries and NSH Add-Ons
+#
+
+#
+# Custom Free Memory Command
+#
+# CONFIG_SYSTEM_FREE is not set
+
+#
+# EMACS-like Command Line Editor
+#
+# CONFIG_SYSTEM_CLE is not set
+
+#
+# FLASH Program Installation
+#
+# CONFIG_SYSTEM_INSTALL is not set
+
+#
+# FLASH Erase-all Command
+#
+
+#
+# I2C tool
+#
+
+#
+# INI File Parser
+#
+# CONFIG_SYSTEM_INIFILE is not set
+
+#
+# NxPlayer media player library / command Line
+#
+# CONFIG_SYSTEM_NXPLAYER is not set
+
+#
+# RAM test
+#
+# CONFIG_SYSTEM_RAMTEST is not set
+
+#
+# readline()
+#
+# CONFIG_SYSTEM_READLINE is not set
+
+#
+# Power Off
+#
+# CONFIG_SYSTEM_POWEROFF is not set
+
+#
+# RAMTRON
+#
+# CONFIG_SYSTEM_RAMTRON is not set
+
+#
+# SD Card
+#
+# CONFIG_SYSTEM_SDCARD is not set
+
+#
+# Sysinfo
+#
+# CONFIG_SYSTEM_SYSINFO is not set
+
+#
+# VI Work-Alike Editor
+#
+# CONFIG_SYSTEM_VI is not set
+
+#
+# Stack Monitor
+#
+
+#
+# USB CDC/ACM Device Commands
+#
+
+#
+# USB Composite Device Commands
+#
+
+#
+# USB Mass Storage Device Commands
+#
+
+#
+# USB Monitor
+#
+
+#
+# Zmodem Commands
+#
+# CONFIG_SYSTEM_ZMODEM is not set
diff --git a/nuttx/configs/sama5d3-xplained/norboot/setenv.sh b/nuttx/configs/sama5d3-xplained/norboot/setenv.sh
new file mode 100755
index 000000000..51f65864f
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/norboot/setenv.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+# configs/sama5d3-xplained/norboot/setenv.sh
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+if [ "$_" = "$0" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+WD=`pwd`
+if [ ! -x "setenv.sh" ]; then
+  echo "This script must be executed from the top-level NuttX build directory"
+  exit 1
+fi
+
+if [ -z "${PATH_ORIG}" ]; then
+  export PATH_ORIG="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the Atmel GCC
+# toolchain under Windows.  You will also have to edit this if you install
+# this toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Atmel/Atmel Toolchain/ARM GCC/Native/4.7.3.99/arm-gnu-toolchain/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${WD}/../misc/buildroot/build_arm/staging_dir/bin"
+
+# Add the path to the toolchain to the PATH varialble
+export PATH="${TOOLCHAIN_BIN}:/sbin:/usr/sbin:${PATH_ORIG}"
+
+echo "PATH : ${PATH}"
diff --git a/nuttx/configs/sama5d3-xplained/nsh/Make.defs b/nuttx/configs/sama5d3-xplained/nsh/Make.defs
new file mode 100644
index 000000000..59f0fd0b6
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/nsh/Make.defs
@@ -0,0 +1,146 @@
+############################################################################
+# configs/sama5d3-xplained/nsh/Make.defs
+#
+#   Copyright (C) 2014-2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}$(DELIM)arch$(DELIM)arm$(DELIM)src$(DELIM)armv7-a$(DELIM)Toolchain.defs
+
+ifeq ($(CONFIG_SAMA5_BOOT_ISRAM),y)
+  LDSCRIPT = isram.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_SDRAM),y)
+  LDSCRIPT = ddram.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS0FLASH),y)
+ifeq ($(CONFIG_BOOT_SDRAM_DATA),y)
+  LDSCRIPT = nor-ddram.ld
+else
+  LDSCRIPT = nor-isram.ld
+endif
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS1FLASH),y)
+#  LDSCRIPT = cs1flash.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS2FLASH),y)
+#  LDSCRIPT = cs2flash.ld
+endif
+
+ifeq ($(CONFIG_SAMA5_BOOT_CS3FLASH),y)
+#  LDSCRIPT = cs3flash.ld
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include}"
+  ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include}" -isystem "${shell cygpath -w $(TOPDIR)$(DELIM)include$(DELIM)cxx}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)$(DELIM)configs$(DELIM)$(CONFIG_ARCH_BOARD)$(DELIM)scripts$(DELIM)$(LDSCRIPT)}"
+else
+  # Linux/Cygwin-native toolchain
+  ARCHINCLUDES = -I. -isystem $(TOPDIR)$(DELIM)include
+  ARCHXXINCLUDES = -I. -isystem $(TOPDIR)$(DELIM)include -isystem $(TOPDIR)$(DELIM)include$(DELIM)cxx
+  ARCHSCRIPT = -T$(TOPDIR)$(DELIM)configs$(DELIM)$(CONFIG_ARCH_BOARD)$(DELIM)scripts$(DELIM)$(LDSCRIPT)
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION = -g
+endif
+
+ifneq ($(CONFIG_DEBUG_NOOPT),y)
+  ARCHOPTIMIZATION += $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCPUFLAGS = -mcpu=cortex-a5 -mfpu=vfpv4-d16
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fno-rtti
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX = -Wall -Wshadow
+ARCHDEFINES =
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS = $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+ifneq ($(CROSSDEV),arm-nuttx-elf-)
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  LDFLAGS += -g
+endif
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
+HOSTLDFLAGS =
+ifeq ($(CONFIG_HOST_WINDOWS),y)
+  HOSTEXEEXT = .exe
+else
+  HOSTEXEEXT =
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native host tools
+  DIRLINK = $(TOPDIR)$(DELIM)tools$(DELIM)copydir.sh
+  DIRUNLINK = $(TOPDIR)$(DELIM)tools$(DELIM)unlink.sh
+  MKDEP = $(TOPDIR)$(DELIM)tools$(DELIM)mknulldeps.sh
+else
+  # Linux/Cygwin-native host tools 
+  MKDEP = $(TOPDIR)$(DELIM)tools$(DELIM)mkdeps$(HOSTEXEEXT)
+endif
+
diff --git a/nuttx/configs/sama5d3-xplained/nsh/defconfig b/nuttx/configs/sama5d3-xplained/nsh/defconfig
new file mode 100644
index 000000000..71f1f3d89
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/nsh/defconfig
@@ -0,0 +1,834 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Nuttx/ Configuration
+#
+
+#
+# Build Setup
+#
+# CONFIG_EXPERIMENTAL is not set
+# CONFIG_DEFAULT_SMALL is not set
+# CONFIG_HOST_LINUX is not set
+# CONFIG_HOST_OSX is not set
+CONFIG_HOST_WINDOWS=y
+# CONFIG_HOST_OTHER is not set
+# CONFIG_WINDOWS_NATIVE is not set
+CONFIG_WINDOWS_CYGWIN=y
+# CONFIG_WINDOWS_MSYS is not set
+# CONFIG_WINDOWS_OTHER is not set
+
+#
+# Build Configuration
+#
+# CONFIG_APPS_DIR="../apps"
+# CONFIG_BUILD_2PASS is not set
+
+#
+# Binary Output Formats
+#
+# CONFIG_RRLOAD_BINARY is not set
+CONFIG_INTELHEX_BINARY=y
+# CONFIG_MOTOROLA_SREC is not set
+CONFIG_RAW_BINARY=y
+
+#
+# Customize Header Files
+#
+# CONFIG_ARCH_STDINT_H is not set
+# CONFIG_ARCH_STDBOOL_H is not set
+# CONFIG_ARCH_MATH_H is not set
+# CONFIG_ARCH_FLOAT_H is not set
+# CONFIG_ARCH_STDARG_H is not set
+
+#
+# Debug Options
+#
+# CONFIG_DEBUG is not set
+CONFIG_ARCH_HAVE_STACKCHECK=y
+# CONFIG_ARCH_HAVE_HEAPCHECK is not set
+# CONFIG_DEBUG_SYMBOLS is not set
+CONFIG_ARCH_HAVE_CUSTOMOPT=y
+# CONFIG_DEBUG_NOOPT is not set
+# CONFIG_DEBUG_CUSTOMOPT is not set
+CONFIG_DEBUG_FULLOPT=y
+
+#
+# System Type
+#
+# CONFIG_ARCH_8051 is not set
+CONFIG_ARCH_ARM=y
+# CONFIG_ARCH_AVR is not set
+# CONFIG_ARCH_HC is not set
+# CONFIG_ARCH_MIPS is not set
+# CONFIG_ARCH_RGMP is not set
+# CONFIG_ARCH_SH is not set
+# CONFIG_ARCH_SIM is not set
+# CONFIG_ARCH_X86 is not set
+# CONFIG_ARCH_Z16 is not set
+# CONFIG_ARCH_Z80 is not set
+CONFIG_ARCH="arm"
+
+#
+# ARM Options
+#
+# CONFIG_ARCH_CHIP_A1X is not set
+# CONFIG_ARCH_CHIP_C5471 is not set
+# CONFIG_ARCH_CHIP_CALYPSO is not set
+# CONFIG_ARCH_CHIP_DM320 is not set
+# CONFIG_ARCH_CHIP_IMX is not set
+# CONFIG_ARCH_CHIP_KINETIS is not set
+# CONFIG_ARCH_CHIP_KL is not set
+# CONFIG_ARCH_CHIP_LM is not set
+# CONFIG_ARCH_CHIP_TIVA is not set
+# CONFIG_ARCH_CHIP_LPC17XX is not set
+# CONFIG_ARCH_CHIP_LPC214X is not set
+# CONFIG_ARCH_CHIP_LPC2378 is not set
+# CONFIG_ARCH_CHIP_LPC31XX is not set
+# CONFIG_ARCH_CHIP_LPC43XX is not set
+# CONFIG_ARCH_CHIP_NUC1XX is not set
+CONFIG_ARCH_CHIP_SAMA5=y
+# CONFIG_ARCH_CHIP_SAMD is not set
+# CONFIG_ARCH_CHIP_SAM34 is not set
+# CONFIG_ARCH_CHIP_STM32 is not set
+# CONFIG_ARCH_CHIP_STR71X is not set
+# CONFIG_ARCH_ARM7TDMI is not set
+# CONFIG_ARCH_ARM926EJS is not set
+# CONFIG_ARCH_ARM920T is not set
+# CONFIG_ARCH_CORTEXM0 is not set
+# CONFIG_ARCH_CORTEXM3 is not set
+# CONFIG_ARCH_CORTEXM4 is not set
+CONFIG_ARCH_CORTEXA5=y
+# CONFIG_ARCH_CORTEXA8 is not set
+CONFIG_ARCH_FAMILY="armv7-a"
+CONFIG_ARCH_CHIP="sama5"
+CONFIG_ARCH_HAVE_FPU=y
+CONFIG_ARCH_FPU=y
+# CONFIG_ARCH_HAVE_MPU is not set
+CONFIG_ARCH_HAVE_LOWVECTORS=y
+CONFIG_ARCH_LOWVECTORS=y
+# CONFIG_ARCH_ROMPGTABLE is not set
+
+#
+# ARMv7-A Configuration Options
+#
+# CONFIG_ARMV7A_TOOLCHAIN_BUILDROOT is not set
+CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y
+# CONFIG_ARMV7A_TOOLCHAIN_DEVKITARM is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIL is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW is not set
+# CONFIG_ARMV7A_TOOLCHAIN_GNU_OABI is not set
+
+#
+# SAMA5 Configuration Options
+#
+CONFIG_SAMA5_HAVE_UART0=y
+CONFIG_SAMA5_HAVE_UART1=y
+CONFIG_SAMA5_HAVE_CAN0=y
+CONFIG_SAMA5_HAVE_CAN1=y
+CONFIG_SAMA5_HAVE_LCDC=y
+CONFIG_SAMA5_HAVE_GMAC=y
+CONFIG_SAMA5_HAVE_EMAC=y
+CONFIG_SAMA5_HAVE_HSMCI2=y
+CONFIG_SAMA5_HAVE_TC1=y
+# CONFIG_ARCH_CHIP_ATSAMA5D31 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D33 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D34 is not set
+# CONFIG_ARCH_CHIP_ATSAMA5D35 is not set
+CONFIG_ARCH_CHIP_ATSAMA5D36=y
+
+#
+# SAMA5 Peripheral Support
+#
+# CONFIG_SAMA5_DBGU is not set
+# CONFIG_SAMA5_PIT is not set
+# CONFIG_SAMA5_WDT is not set
+# CONFIG_SAMA5_RTC is not set
+CONFIG_SAMA5_HSMC=y
+# CONFIG_SAMA5_SMD is not set
+# CONFIG_SAMA5_UART0 is not set
+# CONFIG_SAMA5_UART1 is not set
+# CONFIG_SAMA5_USART0 is not set
+CONFIG_SAMA5_USART1=y
+# CONFIG_SAMA5_USART2 is not set
+# CONFIG_SAMA5_USART3 is not set
+# CONFIG_SAMA5_TWI0 is not set
+# CONFIG_SAMA5_TWI1 is not set
+# CONFIG_SAMA5_TWI2 is not set
+# CONFIG_SAMA5_HSMCI0 is not set
+# CONFIG_SAMA5_HSMCI1 is not set
+# CONFIG_SAMA5_HSMCI2 is not set
+# CONFIG_SAMA5_SPI0 is not set
+# CONFIG_SAMA5_SPI1 is not set
+# CONFIG_SAMA5_TC0 is not set
+# CONFIG_SAMA5_TC1 is not set
+# CONFIG_SAMA5_PWM is not set
+# CONFIG_SAMA5_ADC is not set
+# CONFIG_SAMA5_DMAC0 is not set
+# CONFIG_SAMA5_DMAC1 is not set
+# CONFIG_SAMA5_UHPHS is not set
+# CONFIG_SAMA5_UDPHS is not set
+# CONFIG_SAMA5_GMAC is not set
+# CONFIG_SAMA5_EMAC is not set
+# CONFIG_SAMA5_LCDC is not set
+# CONFIG_SAMA5_ISI is not set
+# CONFIG_SAMA5_CAN0 is not set
+# CONFIG_SAMA5_CAN1 is not set
+# CONFIG_SAMA5_SHA is not set
+# CONFIG_SAMA5_AES is not set
+# CONFIG_SAMA5_TDES is not set
+# CONFIG_SAMA5_TRNG is not set
+# CONFIG_SAMA5_ARM is not set
+# CONFIG_SAMA5_FUSE is not set
+# CONFIG_SAMA5_MPDDRC is not set
+# CONFIG_SAMA5_PIO_IRQ is not set
+
+#
+# External Memory Configuration
+#
+CONFIG_SAMA5_EBICS0=y
+CONFIG_SAMA5_EBICS0_SIZE=134217728
+# CONFIG_SAMA5_EBICS0_SRAM is not set
+# CONFIG_SAMA5_EBICS0_PSRAM is not set
+# CONFIG_SAMA5_EBICS0_PROM is not set
+# CONFIG_SAMA5_EBICS0_EEPROM is not set
+# CONFIG_SAMA5_EBICS0_EPROM is not set
+# CONFIG_SAMA5_EBICS0_LCD is not set
+CONFIG_SAMA5_EBICS0_NOR=y
+# CONFIG_SAMA5_EBICS1 is not set
+# CONFIG_SAMA5_EBICS2 is not set
+# CONFIG_SAMA5_EBICS3 is not set
+# CONFIG_SAMA5_HAVE_NAND is not set
+# CONFIG_SAMA5_HAVE_PMECC is not set
+# CONFIG_SAMA5_BOOT_ISRAM is not set
+CONFIG_SAMA5_BOOT_CS0FLASH=y
+
+#
+# Heap Configuration
+#
+CONFIG_SAMA5_ISRAM_HEAP=y
+
+#
+# Architecture Options
+#
+# CONFIG_ARCH_NOINTC is not set
+# CONFIG_ARCH_VECNOTIRQ is not set
+# CONFIG_ARCH_DMA is not set
+CONFIG_ARCH_HAVE_IRQPRIO=y
+# CONFIG_CUSTOM_STACK is not set
+# CONFIG_ADDRENV is not set
+CONFIG_ARCH_HAVE_VFORK=y
+CONFIG_ARCH_HAVE_MMU=y
+CONFIG_ARCH_NAND_HWECC=y
+# CONFIG_PAGING is not set
+CONFIG_ARCH_IRQPRIO=y
+CONFIG_ARCH_STACKDUMP=y
+# CONFIG_ENDIAN_BIG is not set
+# CONFIG_ARCH_IDLE_CUSTOM is not set
+# CONFIG_ARCH_HAVE_RAMFUNCS is not set
+# CONFIG_ARCH_HAVE_RAMVECTORS is not set
+
+#
+# Board Settings
+#
+CONFIG_BOARD_LOOPSPERMSEC=49341
+# CONFIG_ARCH_CALIBRATION is not set
+
+#
+# Interrupt options
+#
+CONFIG_ARCH_HAVE_INTERRUPTSTACK=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+# CONFIG_ARCH_HAVE_HIPRI_INTERRUPT is not set
+
+#
+# Boot options
+#
+# CONFIG_BOOT_RUNFROMEXTSRAM is not set
+CONFIG_BOOT_RUNFROMFLASH=y
+# CONFIG_BOOT_RUNFROMISRAM is not set
+# CONFIG_BOOT_RUNFROMSDRAM is not set
+# CONFIG_BOOT_COPYTORAM is not set
+
+#
+# Boot Memory Configuration
+#
+CONFIG_RAM_START=0x00304000
+CONFIG_RAM_VSTART=0x00304000
+CONFIG_RAM_SIZE=114688
+CONFIG_FLASH_START=0x10000000
+CONFIG_FLASH_VSTART=0x10000000
+CONFIG_FLASH_SIZE=134217728
+# CONFIG_ARCH_HAVE_SDRAM is not set
+
+#
+# Board Selection
+#
+CONFIG_ARCH_BOARD_SAMA5D3_XPLAINED=y
+# CONFIG_ARCH_BOARD_CUSTOM is not set
+CONFIG_ARCH_BOARD="sama5d3-xplained"
+
+#
+# Common Board Options
+#
+CONFIG_ARCH_HAVE_LEDS=y
+CONFIG_ARCH_LEDS=y
+CONFIG_ARCH_HAVE_BUTTONS=y
+# CONFIG_ARCH_BUTTONS is not set
+CONFIG_ARCH_HAVE_IRQBUTTONS=y
+CONFIG_NSH_MMCSDMINOR=0
+
+#
+# Board-Specific Options
+#
+
+#
+# RTOS Features
+#
+# CONFIG_BOARD_INITIALIZE is not set
+CONFIG_MSEC_PER_TICK=10
+# CONFIG_SYSTEM_TIME64 is not set
+CONFIG_RR_INTERVAL=200
+# CONFIG_SCHED_CPULOAD is not set
+# CONFIG_SCHED_INSTRUMENTATION is not set
+CONFIG_TASK_NAME_SIZE=32
+# CONFIG_SCHED_HAVE_PARENT is not set
+# CONFIG_JULIAN_TIME is not set
+CONFIG_START_YEAR=2014
+CONFIG_START_MONTH=7
+CONFIG_START_DAY=31
+CONFIG_DEV_CONSOLE=y
+# CONFIG_MUTEX_TYPES is not set
+# CONFIG_PRIORITY_INHERITANCE is not set
+# CONFIG_FDCLONE_DISABLE is not set
+# CONFIG_FDCLONE_STDIO is not set
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SCHED_WAITPID=y
+# CONFIG_SCHED_STARTHOOK is not set
+# CONFIG_SCHED_ATEXIT is not set
+# CONFIG_SCHED_ONEXIT is not set
+CONFIG_USER_ENTRYPOINT="nsh_main"
+CONFIG_DISABLE_OS_API=y
+# CONFIG_DISABLE_CLOCK is not set
+# CONFIG_DISABLE_POSIX_TIMERS is not set
+# CONFIG_DISABLE_PTHREAD is not set
+# CONFIG_DISABLE_SIGNALS is not set
+# CONFIG_DISABLE_MQUEUE is not set
+CONFIG_DISABLE_ENVIRON=y
+
+#
+# Signal Numbers
+#
+CONFIG_SIG_SIGUSR1=1
+CONFIG_SIG_SIGUSR2=2
+CONFIG_SIG_SIGALARM=3
+CONFIG_SIG_SIGCONDTIMEDOUT=16
+
+#
+# Sizes of configurable things (0 disables)
+#
+CONFIG_MAX_TASKS=16
+CONFIG_MAX_TASK_ARGS=4
+CONFIG_NPTHREAD_KEYS=4
+CONFIG_NFILE_DESCRIPTORS=8
+CONFIG_NFILE_STREAMS=8
+CONFIG_NAME_MAX=32
+CONFIG_PREALLOC_MQ_MSGS=4
+CONFIG_MQ_MAXMSGSIZE=32
+CONFIG_MAX_WDOGPARMS=2
+CONFIG_PREALLOC_WDOGS=16
+CONFIG_PREALLOC_TIMERS=4
+
+#
+# Stack and heap information
+#
+CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=2048
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=2048
+
+#
+# Device Drivers
+#
+CONFIG_DISABLE_POLL=y
+CONFIG_DEV_NULL=y
+# CONFIG_DEV_ZERO is not set
+# CONFIG_LOOP is not set
+# CONFIG_RAMDISK is not set
+# CONFIG_CAN is not set
+# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
+# CONFIG_PWM is not set
+# CONFIG_ARCH_HAVE_I2CRESET is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+# CONFIG_I2S is not set
+# CONFIG_RTC is not set
+# CONFIG_WATCHDOG is not set
+# CONFIG_ANALOG is not set
+# CONFIG_AUDIO_DEVICES is not set
+# CONFIG_VIDEO_DEVICES is not set
+# CONFIG_BCH is not set
+# CONFIG_INPUT is not set
+# CONFIG_LCD is not set
+# CONFIG_MMCSD is not set
+# CONFIG_MTD is not set
+# CONFIG_PIPES is not set
+# CONFIG_PM is not set
+# CONFIG_POWER is not set
+# CONFIG_SENSORS is not set
+# CONFIG_SERCOMM_CONSOLE is not set
+CONFIG_SERIAL=y
+# CONFIG_DEV_LOWCONSOLE is not set
+# CONFIG_16550_UART is not set
+# CONFIG_ARCH_HAVE_UART is not set
+# CONFIG_ARCH_HAVE_UART0 is not set
+# CONFIG_ARCH_HAVE_UART1 is not set
+# CONFIG_ARCH_HAVE_UART2 is not set
+# CONFIG_ARCH_HAVE_UART3 is not set
+# CONFIG_ARCH_HAVE_UART4 is not set
+# CONFIG_ARCH_HAVE_UART5 is not set
+# CONFIG_ARCH_HAVE_UART6 is not set
+# CONFIG_ARCH_HAVE_UART7 is not set
+# CONFIG_ARCH_HAVE_UART8 is not set
+# CONFIG_ARCH_HAVE_SCI0 is not set
+# CONFIG_ARCH_HAVE_SCI1 is not set
+# CONFIG_ARCH_HAVE_USART0 is not set
+CONFIG_ARCH_HAVE_USART1=y
+# CONFIG_ARCH_HAVE_USART2 is not set
+# CONFIG_ARCH_HAVE_USART3 is not set
+# CONFIG_ARCH_HAVE_USART4 is not set
+# CONFIG_ARCH_HAVE_USART5 is not set
+# CONFIG_ARCH_HAVE_USART6 is not set
+# CONFIG_ARCH_HAVE_USART7 is not set
+# CONFIG_ARCH_HAVE_USART8 is not set
+
+#
+# USART Configuration
+#
+CONFIG_USART1_ISUART=y
+CONFIG_MCU_SERIAL=y
+CONFIG_STANDARD_SERIAL=y
+CONFIG_USART1_SERIAL_CONSOLE=y
+# CONFIG_NO_SERIAL_CONSOLE is not set
+
+#
+# USART1 Configuration
+#
+CONFIG_USART1_RXBUFSIZE=256
+CONFIG_USART1_TXBUFSIZE=256
+CONFIG_USART1_BAUD=115200
+CONFIG_USART1_BITS=8
+CONFIG_USART1_PARITY=0
+CONFIG_USART1_2STOP=0
+# CONFIG_USART1_IFLOWCONTROL is not set
+# CONFIG_USART1_OFLOWCONTROL is not set
+# CONFIG_SERIAL_IFLOWCONTROL is not set
+# CONFIG_SERIAL_OFLOWCONTROL is not set
+# CONFIG_USBDEV is not set
+# CONFIG_USBHOST is not set
+# CONFIG_WIRELESS is not set
+
+#
+# System Logging Device Options
+#
+
+#
+# System Logging
+#
+# CONFIG_RAMLOG is not set
+
+#
+# Networking Support
+#
+# CONFIG_ARCH_HAVE_NET is not set
+# CONFIG_ARCH_HAVE_PHY is not set
+# CONFIG_NET is not set
+
+#
+# File Systems
+#
+
+#
+# File system configuration
+#
+# CONFIG_DISABLE_MOUNTPOINT is not set
+# CONFIG_DISABLE_PSEUDOFS_OPERATIONS is not set
+CONFIG_FS_READABLE=y
+CONFIG_FS_WRITABLE=y
+# CONFIG_FS_RAMMAP is not set
+CONFIG_FS_FAT=y
+CONFIG_FAT_LCNAMES=y
+CONFIG_FAT_LFN=y
+CONFIG_FAT_MAXFNAME=32
+# CONFIG_FS_FATTIME is not set
+# CONFIG_FAT_DMAMEMORY is not set
+# CONFIG_FS_NXFFS is not set
+# CONFIG_FS_ROMFS is not set
+# CONFIG_FS_SMARTFS is not set
+# CONFIG_FS_BINFS is not set
+# CONFIG_FS_PROCFS is not set
+
+#
+# System Logging
+#
+# CONFIG_SYSLOG_ENABLE is not set
+# CONFIG_SYSLOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_NX is not set
+
+#
+# Memory Management
+#
+# CONFIG_MM_MULTIHEAP is not set
+# CONFIG_MM_SMALL is not set
+CONFIG_MM_REGIONS=1
+# CONFIG_ARCH_HAVE_HEAP2 is not set
+# CONFIG_GRAN is not set
+
+#
+# Audio Support
+#
+# CONFIG_AUDIO is not set
+
+#
+# Binary Formats
+#
+# CONFIG_BINFMT_DISABLE is not set
+# CONFIG_NXFLAT is not set
+# CONFIG_ELF is not set
+CONFIG_BUILTIN=y
+# CONFIG_PIC is not set
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+
+#
+# Library Routines
+#
+
+#
+# Standard C Library Options
+#
+CONFIG_STDIO_BUFFER_SIZE=64
+CONFIG_STDIO_LINEBUFFER=y
+CONFIG_NUNGET_CHARS=2
+# CONFIG_LIBM is not set
+# CONFIG_NOPRINTF_FIELDWIDTH is not set
+# CONFIG_LIBC_FLOATINGPOINT is not set
+CONFIG_LIB_RAND_ORDER=1
+# CONFIG_EOL_IS_CR is not set
+# CONFIG_EOL_IS_LF is not set
+# CONFIG_EOL_IS_BOTH_CRLF is not set
+CONFIG_EOL_IS_EITHER_CRLF=y
+# CONFIG_LIBC_EXECFUNCS is not set
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
+CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=2048
+# CONFIG_LIBC_STRERROR is not set
+# CONFIG_LIBC_PERROR_STDOUT is not set
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_LIB_SENDFILE_BUFSIZE=512
+# CONFIG_ARCH_ROMGETC is not set
+# CONFIG_ARCH_OPTIMIZED_FUNCTIONS is not set
+
+#
+# Non-standard Library Support
+#
+# CONFIG_SCHED_WORKQUEUE is not set
+# CONFIG_LIB_KBDCODEC is not set
+# CONFIG_LIB_SLCDCODEC is not set
+
+#
+# Basic CXX Support
+#
+# CONFIG_C99_BOOL8 is not set
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+# CONFIG_CXX_NEWLONG is not set
+
+#
+# uClibc++ Standard C++ Library
+#
+# CONFIG_UCLIBCXX is not set
+
+#
+# Application Configuration
+#
+
+#
+# Built-In Applications
+#
+CONFIG_BUILTIN_PROXY_STACKSIZE=1024
+
+#
+# Examples
+#
+# CONFIG_EXAMPLES_BUTTONS is not set
+# CONFIG_EXAMPLES_CAN is not set
+# CONFIG_EXAMPLES_CONFIGDATA is not set
+# CONFIG_EXAMPLES_CXXTEST is not set
+# CONFIG_EXAMPLES_DHCPD is not set
+# CONFIG_EXAMPLES_ELF is not set
+# CONFIG_EXAMPLES_FTPC is not set
+# CONFIG_EXAMPLES_FTPD is not set
+# CONFIG_EXAMPLES_HELLO is not set
+# CONFIG_EXAMPLES_HELLOXX is not set
+# CONFIG_EXAMPLES_JSON is not set
+# CONFIG_EXAMPLES_HIDKBD is not set
+# CONFIG_EXAMPLES_KEYPADTEST is not set
+# CONFIG_EXAMPLES_IGMP is not set
+# CONFIG_EXAMPLES_MM is not set
+# CONFIG_EXAMPLES_MODBUS is not set
+# CONFIG_EXAMPLES_MOUNT is not set
+# CONFIG_EXAMPLES_NRF24L01TERM is not set
+CONFIG_EXAMPLES_NSH=y
+CONFIG_EXAMPLES_NSH_CXXINITIALIZE=y
+# CONFIG_EXAMPLES_NULL is not set
+# CONFIG_EXAMPLES_NX is not set
+# CONFIG_EXAMPLES_NXCONSOLE is not set
+# CONFIG_EXAMPLES_NXFFS is not set
+# CONFIG_EXAMPLES_NXFLAT is not set
+# CONFIG_EXAMPLES_NXHELLO is not set
+# CONFIG_EXAMPLES_NXIMAGE is not set
+# CONFIG_EXAMPLES_NXLINES is not set
+# CONFIG_EXAMPLES_NXTEXT is not set
+# CONFIG_EXAMPLES_OSTEST is not set
+# CONFIG_EXAMPLES_PASHELLO is not set
+# CONFIG_EXAMPLES_PIPE is not set
+# CONFIG_EXAMPLES_POSIXSPAWN is not set
+# CONFIG_EXAMPLES_QENCODER is not set
+# CONFIG_EXAMPLES_RGMP is not set
+# CONFIG_EXAMPLES_ROMFS is not set
+# CONFIG_EXAMPLES_SENDMAIL is not set
+# CONFIG_EXAMPLES_SERLOOP is not set
+# CONFIG_EXAMPLES_SLCD is not set
+# CONFIG_EXAMPLES_SMART_TEST is not set
+# CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_TCPECHO is not set
+# CONFIG_EXAMPLES_TELNETD is not set
+# CONFIG_EXAMPLES_THTTPD is not set
+# CONFIG_EXAMPLES_TIFF is not set
+# CONFIG_EXAMPLES_TOUCHSCREEN is not set
+# CONFIG_EXAMPLES_UDP is not set
+# CONFIG_EXAMPLES_UIP is not set
+# CONFIG_EXAMPLES_USBSERIAL is not set
+# CONFIG_EXAMPLES_USBTERM is not set
+# CONFIG_EXAMPLES_WATCHDOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_TIFF is not set
+
+#
+# Interpreters
+#
+# CONFIG_INTERPRETERS_FICL is not set
+# CONFIG_INTERPRETERS_PCODE is not set
+
+#
+# Network Utilities
+#
+
+#
+# Networking Utilities
+#
+# CONFIG_NETUTILS_CODECS is not set
+# CONFIG_NETUTILS_DHCPD is not set
+# CONFIG_NETUTILS_FTPC is not set
+# CONFIG_NETUTILS_FTPD is not set
+# CONFIG_NETUTILS_JSON is not set
+# CONFIG_NETUTILS_SMTP is not set
+# CONFIG_NETUTILS_TFTPC is not set
+# CONFIG_NETUTILS_THTTPD is not set
+# CONFIG_NETUTILS_UIPLIB is not set
+# CONFIG_NETUTILS_WEBCLIENT is not set
+
+#
+# FreeModBus
+#
+# CONFIG_MODBUS is not set
+
+#
+# NSH Library
+#
+CONFIG_NSH_LIBRARY=y
+CONFIG_NSH_READLINE=y
+# CONFIG_NSH_CLE is not set
+CONFIG_NSH_BUILTIN_APPS=y
+
+#
+# Disable Individual commands
+#
+# CONFIG_NSH_DISABLE_ADDROUTE is not set
+# CONFIG_NSH_DISABLE_CAT is not set
+# CONFIG_NSH_DISABLE_CD is not set
+# CONFIG_NSH_DISABLE_CP is not set
+# CONFIG_NSH_DISABLE_CMP is not set
+# CONFIG_NSH_DISABLE_DD is not set
+# CONFIG_NSH_DISABLE_DF is not set
+# CONFIG_NSH_DISABLE_DELROUTE is not set
+# CONFIG_NSH_DISABLE_ECHO is not set
+# CONFIG_NSH_DISABLE_EXEC is not set
+# CONFIG_NSH_DISABLE_EXIT is not set
+# CONFIG_NSH_DISABLE_FREE is not set
+# CONFIG_NSH_DISABLE_GET is not set
+# CONFIG_NSH_DISABLE_HELP is not set
+# CONFIG_NSH_DISABLE_HEXDUMP is not set
+# CONFIG_NSH_DISABLE_IFCONFIG is not set
+# CONFIG_NSH_DISABLE_KILL is not set
+# CONFIG_NSH_DISABLE_LOSETUP is not set
+# CONFIG_NSH_DISABLE_LS is not set
+# CONFIG_NSH_DISABLE_MB is not set
+# CONFIG_NSH_DISABLE_MKDIR is not set
+# CONFIG_NSH_DISABLE_MKFATFS is not set
+# CONFIG_NSH_DISABLE_MKFIFO is not set
+# CONFIG_NSH_DISABLE_MKRD is not set
+# CONFIG_NSH_DISABLE_MH is not set
+# CONFIG_NSH_DISABLE_MOUNT is not set
+# CONFIG_NSH_DISABLE_MW is not set
+# CONFIG_NSH_DISABLE_PS is not set
+# CONFIG_NSH_DISABLE_PUT is not set
+# CONFIG_NSH_DISABLE_PWD is not set
+# CONFIG_NSH_DISABLE_RM is not set
+# CONFIG_NSH_DISABLE_RMDIR is not set
+# CONFIG_NSH_DISABLE_SET is not set
+# CONFIG_NSH_DISABLE_SH is not set
+# CONFIG_NSH_DISABLE_SLEEP is not set
+# CONFIG_NSH_DISABLE_TEST is not set
+# CONFIG_NSH_DISABLE_UMOUNT is not set
+# CONFIG_NSH_DISABLE_UNSET is not set
+# CONFIG_NSH_DISABLE_USLEEP is not set
+# CONFIG_NSH_DISABLE_WGET is not set
+# CONFIG_NSH_DISABLE_XD is not set
+
+#
+# Configure Command Options
+#
+# CONFIG_NSH_CMDOPT_DF_H is not set
+CONFIG_NSH_CODECS_BUFSIZE=128
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_LINELEN=80
+# CONFIG_NSH_DISABLE_SEMICOLON is not set
+# CONFIG_NSH_CMDPARMS is not set
+CONFIG_NSH_MAXARGUMENTS=6
+# CONFIG_NSH_ARGCAT is not set
+CONFIG_NSH_NESTDEPTH=3
+# CONFIG_NSH_DISABLESCRIPT is not set
+# CONFIG_NSH_DISABLE_ITEF is not set
+# CONFIG_NSH_DISABLE_LOOPS is not set
+# CONFIG_NSH_DISABLEBG is not set
+CONFIG_NSH_CONSOLE=y
+
+#
+# USB Trace Support
+#
+# CONFIG_NSH_CONDEV is not set
+# CONFIG_NSH_ARCHINIT is not set
+
+#
+# NxWidgets/NxWM
+#
+
+#
+# Platform-specific Support
+#
+# CONFIG_PLATFORM_CONFIGDATA is not set
+
+#
+# System Libraries and NSH Add-Ons
+#
+
+#
+# Custom Free Memory Command
+#
+# CONFIG_SYSTEM_FREE is not set
+
+#
+# EMACS-like Command Line Editor
+#
+# CONFIG_SYSTEM_CLE is not set
+
+#
+# FLASH Program Installation
+#
+# CONFIG_SYSTEM_INSTALL is not set
+
+#
+# FLASH Erase-all Command
+#
+
+#
+# I2C tool
+#
+
+#
+# INI File Parser
+#
+# CONFIG_SYSTEM_INIFILE is not set
+
+#
+# NxPlayer media player library / command Line
+#
+# CONFIG_SYSTEM_NXPLAYER is not set
+
+#
+# RAM test
+#
+# CONFIG_SYSTEM_RAMTEST is not set
+
+#
+# readline()
+#
+CONFIG_SYSTEM_READLINE=y
+CONFIG_READLINE_ECHO=y
+
+#
+# Power Off
+#
+# CONFIG_SYSTEM_POWEROFF is not set
+
+#
+# RAMTRON
+#
+# CONFIG_SYSTEM_RAMTRON is not set
+
+#
+# SD Card
+#
+# CONFIG_SYSTEM_SDCARD is not set
+
+#
+# Sysinfo
+#
+# CONFIG_SYSTEM_SYSINFO is not set
+
+#
+# VI Work-Alike Editor
+#
+# CONFIG_SYSTEM_VI is not set
+
+#
+# Stack Monitor
+#
+
+#
+# USB CDC/ACM Device Commands
+#
+
+#
+# USB Composite Device Commands
+#
+
+#
+# USB Mass Storage Device Commands
+#
+
+#
+# USB Monitor
+#
+
+#
+# Zmodem Commands
+#
+# CONFIG_SYSTEM_ZMODEM is not set
diff --git a/nuttx/configs/sama5d3-xplained/nsh/setenv.sh b/nuttx/configs/sama5d3-xplained/nsh/setenv.sh
new file mode 100755
index 000000000..c66a4e249
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/nsh/setenv.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+# configs/sama5d3-xplained/nsh/setenv.sh
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+if [ "$_" = "$0" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+WD=`pwd`
+if [ ! -x "setenv.sh" ]; then
+  echo "This script must be executed from the top-level NuttX build directory"
+  exit 1
+fi
+
+if [ -z "${PATH_ORIG}" ]; then
+  export PATH_ORIG="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the Atmel GCC
+# toolchain under Windows.  You will also have to edit this if you install
+# this toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Atmel/Atmel Toolchain/ARM GCC/Native/4.7.3.99/arm-gnu-toolchain/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows.  You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows.  You will also have to edit this if you install
+# the Atollic toolchain in any other location.  /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for STMicroelectronics STM32 Lite 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+#export TOOLCHAIN_BIN="${WD}/../misc/buildroot/build_arm/staging_dir/bin"
+
+# Add the path to the toolchain to the PATH varialble
+export PATH="${TOOLCHAIN_BIN}:/sbin:/usr/sbin:${PATH_ORIG}"
+
+echo "PATH : ${PATH}"
diff --git a/nuttx/configs/sama5d3-xplained/scripts/ddram.ld b/nuttx/configs/sama5d3-xplained/scripts/ddram.ld
new file mode 100644
index 000000000..96e343239
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/scripts/ddram.ld
@@ -0,0 +1,123 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/scripts/ddram.ld
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* The SAMA5D3 has 128 KB of ISRAM beginning at virtual address 0x0030:0000.
+ * This memory configuration, however, loads into the 64 MB SDRAM on board
+ * the SAMA5D3-Xplained which lies at 0x2000:0000
+ *
+ * Vectors in low memory are assumed and 16KB of ISRAM is reserved at the
+ * high end of ISRAM for the page table.
+ */
+
+MEMORY
+{
+	isram (W!RX) : ORIGIN = 0x300000, LENGTH = 128K - 16K
+	sdram (W!RX) : ORIGIN = 0x20000000, LENGTH = 64M
+}
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(entry)
+ENTRY(_stext)
+
+SECTIONS
+{
+	.text : {
+		_stext = ABSOLUTE(.);
+		*(.vectors)
+		*(.text .text.*)
+		*(.fixup)
+		*(.gnu.warning)
+		*(.rodata .rodata.*)
+		*(.gnu.linkonce.t.*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.got)
+		*(.gcc_except_table)
+		*(.gnu.linkonce.r.*)
+		*(.ARM.extab*)
+		*(.gnu.linkonce.armextab.*)
+		_etext = ABSOLUTE(.);
+	} > sdram
+
+	.init_section : {
+		_sinit = ABSOLUTE(.);
+		*(.init_array .init_array.*)
+		_einit = ABSOLUTE(.);
+	} > sdram
+
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} > sdram
+
+	/* .ARM.exidx is sorted, so has to go in its own output section.  */
+
+	PROVIDE_HIDDEN (__exidx_start = .);
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > sdram
+	PROVIDE_HIDDEN (__exidx_end = .);
+
+	.data : {
+		_sdata = ABSOLUTE(.);
+		*(.data .data.*)
+		*(.gnu.linkonce.d.*)
+		CONSTRUCTORS
+		_edata = ABSOLUTE(.);
+	} > sdram
+
+	.bss : {
+		_sbss = ABSOLUTE(.);
+		*(.bss .bss.*)
+		*(.gnu.linkonce.b.*)
+		*(COMMON)
+		_ebss = ABSOLUTE(.);
+	} > sdram
+
+	/* Stabs debugging sections. */
+	.stab 0 : { *(.stab) }
+	.stabstr 0 : { *(.stabstr) }
+	.stab.excl 0 : { *(.stab.excl) }
+	.stab.exclstr 0 : { *(.stab.exclstr) }
+	.stab.index 0 : { *(.stab.index) }
+	.stab.indexstr 0 : { *(.stab.indexstr) }
+	.comment 0 : { *(.comment) }
+	.debug_abbrev 0 : { *(.debug_abbrev) }
+	.debug_info 0 : { *(.debug_info) }
+	.debug_line 0 : { *(.debug_line) }
+	.debug_pubnames 0 : { *(.debug_pubnames) }
+	.debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/nuttx/configs/sama5d3-xplained/scripts/isram.ld b/nuttx/configs/sama5d3-xplained/scripts/isram.ld
new file mode 100644
index 000000000..473cd6b21
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/scripts/isram.ld
@@ -0,0 +1,120 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/scripts/isram.ld
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* The SAMA5D3 has 128 KB of ISRAM beginning at virtual address 0x0030:0000.
+ *
+ * Vectors in low memory are assumed and 16KB of ISRAM is reserved at the
+ * high end of ISRAM for the page table.
+ */
+
+MEMORY
+{
+	isram (W!RX) : ORIGIN = 0x300000, LENGTH = 128K - 16K
+}
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(entry)
+ENTRY(_stext)
+
+SECTIONS
+{
+	.text : {
+		_stext = ABSOLUTE(.);
+		*(.vectors)
+		*(.text .text.*)
+		*(.fixup)
+		*(.gnu.warning)
+		*(.rodata .rodata.*)
+		*(.gnu.linkonce.t.*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.got)
+		*(.gcc_except_table)
+		*(.gnu.linkonce.r.*)
+		*(.ARM.extab*)
+		*(.gnu.linkonce.armextab.*)
+		_etext = ABSOLUTE(.);
+	} > isram
+
+	.init_section : {
+		_sinit = ABSOLUTE(.);
+		*(.init_array .init_array.*)
+		_einit = ABSOLUTE(.);
+	} > isram
+
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} > isram
+
+	/* .ARM.exidx is sorted, so has to go in its own output section.  */
+
+	PROVIDE_HIDDEN (__exidx_start = .);
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > isram
+	PROVIDE_HIDDEN (__exidx_end = .);
+
+	.data : {
+		_sdata = ABSOLUTE(.);
+		*(.data .data.*)
+		*(.gnu.linkonce.d.*)
+		CONSTRUCTORS
+		_edata = ABSOLUTE(.);
+	} > isram
+
+	.bss : {
+		_sbss = ABSOLUTE(.);
+		*(.bss .bss.*)
+		*(.gnu.linkonce.b.*)
+		*(COMMON)
+		_ebss = ABSOLUTE(.);
+	} > isram
+
+	/* Stabs debugging sections. */
+	.stab 0 : { *(.stab) }
+	.stabstr 0 : { *(.stabstr) }
+	.stab.excl 0 : { *(.stab.excl) }
+	.stab.exclstr 0 : { *(.stab.exclstr) }
+	.stab.index 0 : { *(.stab.index) }
+	.stab.indexstr 0 : { *(.stab.indexstr) }
+	.comment 0 : { *(.comment) }
+	.debug_abbrev 0 : { *(.debug_abbrev) }
+	.debug_info 0 : { *(.debug_info) }
+	.debug_line 0 : { *(.debug_line) }
+	.debug_pubnames 0 : { *(.debug_pubnames) }
+	.debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/nuttx/configs/sama5d3-xplained/scripts/nor-ddram.ld b/nuttx/configs/sama5d3-xplained/scripts/nor-ddram.ld
new file mode 100644
index 000000000..f74d7bcf5
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/scripts/nor-ddram.ld
@@ -0,0 +1,131 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/scripts/nor-ddram.ld
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* The SAMA5D3-Xplained has 128MB of NOR flash at CS0 (0x1000:0000).  In this
+ * configuration, the .text and a copy of the .data section will be loaded
+ * into NOR flash.  NuttX .data, .bss, the IDLE stack, and the primary
+ * heap will be allocated in SRAM.  The SAMA5D3 has 128 KB of ISRAM beginning
+ * at virtual address 0x0030:0000.
+ *
+ * The SAMA5D3 has 128 KB of ISRAM beginning at virtual address 0x0030:0000
+ * And 256Mb of SDRAm at address 0x2000:0000.  This script assumes ISRAM used
+ * only for the page table.  All variables are retained in SDRAM.
+ *
+ * Vectors in low memory are assumed to reside at the beginning of NOR flash.
+ */
+
+MEMORY
+{
+	norflash (W!RX) : ORIGIN = 0x10000000, LENGTH = 128M
+	isram    (WR)   : ORIGIN = 0x00304000, LENGTH = 128K - 16K
+	sdram    (W!RX) : ORIGIN = 0x20000000, LENGTH = 256K
+}
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(entry)
+ENTRY(_stext)
+
+SECTIONS
+{
+	.text : {
+		_stext = ABSOLUTE(.);
+		*(.vectors)
+		*(.text .text.*)
+		*(.fixup)
+		*(.gnu.warning)
+		*(.rodata .rodata.*)
+		*(.gnu.linkonce.t.*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.got)
+		*(.gcc_except_table)
+		*(.gnu.linkonce.r.*)
+		*(.ARM.extab*)
+		*(.gnu.linkonce.armextab.*)
+		_etext = ABSOLUTE(.);
+	} > norflash
+
+	.init_section : {
+		_sinit = ABSOLUTE(.);
+		*(.init_array .init_array.*)
+		_einit = ABSOLUTE(.);
+	} > norflash
+
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} > norflash
+
+	/* .ARM.exidx is sorted, so has to go in its own output section.  */
+
+	PROVIDE_HIDDEN (__exidx_start = .);
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > norflash
+	PROVIDE_HIDDEN (__exidx_end = .);
+
+	.data : {
+		_sdata = ABSOLUTE(.);
+		*(.data .data.*)
+		*(.gnu.linkonce.d.*)
+		CONSTRUCTORS
+		_edata = ABSOLUTE(.);
+	} > sdram AT > norflash
+
+	_eronly = LOADADDR(.data);
+
+	.bss : {
+		_sbss = ABSOLUTE(.);
+		*(.bss .bss.*)
+		*(.gnu.linkonce.b.*)
+		*(COMMON)
+		_ebss = ABSOLUTE(.);
+	} > sdram
+
+	/* Stabs debugging sections. */
+	.stab 0 : { *(.stab) }
+	.stabstr 0 : { *(.stabstr) }
+	.stab.excl 0 : { *(.stab.excl) }
+	.stab.exclstr 0 : { *(.stab.exclstr) }
+	.stab.index 0 : { *(.stab.index) }
+	.stab.indexstr 0 : { *(.stab.indexstr) }
+	.comment 0 : { *(.comment) }
+	.debug_abbrev 0 : { *(.debug_abbrev) }
+	.debug_info 0 : { *(.debug_info) }
+	.debug_line 0 : { *(.debug_line) }
+	.debug_pubnames 0 : { *(.debug_pubnames) }
+	.debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/nuttx/configs/sama5d3-xplained/scripts/nor-isram.ld b/nuttx/configs/sama5d3-xplained/scripts/nor-isram.ld
new file mode 100644
index 000000000..486624b04
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/scripts/nor-isram.ld
@@ -0,0 +1,127 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/scripts/nor-isram.ld
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* The SAMA5D3-Xplained has 128MB of NOR flash at CS0 (0x1000:0000).  In this
+ * configuration, the .text and a copy of the .data section will be loaded
+ * into NOR flash.  NuttX .data, .bss, the IDLE stack, and the primary
+ * heap will be allocated in SRAM.  The SAMA5D3 has 128 KB of ISRAM beginning
+ * at virtual address 0x0030:0000.
+ *
+ * Vectors in low memory are assumed to reside at the beginning of NOR flash
+ * 16KB of ISRAM is reserved at the beginning of ISRAM for the page table.
+ */
+
+MEMORY
+{
+	norflash (W!RX) : ORIGIN = 0x10000000, LENGTH = 128M
+	isram    (WR)   : ORIGIN = 0x00304000, LENGTH = 128K - 16K
+}
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(entry)
+ENTRY(_stext)
+
+SECTIONS
+{
+	.text : {
+		_stext = ABSOLUTE(.);
+		*(.vectors)
+		*(.text .text.*)
+		*(.fixup)
+		*(.gnu.warning)
+		*(.rodata .rodata.*)
+		*(.gnu.linkonce.t.*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.got)
+		*(.gcc_except_table)
+		*(.gnu.linkonce.r.*)
+		*(.ARM.extab*)
+		*(.gnu.linkonce.armextab.*)
+		_etext = ABSOLUTE(.);
+	} > norflash
+
+	.init_section : {
+		_sinit = ABSOLUTE(.);
+		*(.init_array .init_array.*)
+		_einit = ABSOLUTE(.);
+	} > norflash
+
+	.ARM.extab : {
+		*(.ARM.extab*)
+	} > norflash
+
+	/* .ARM.exidx is sorted, so has to go in its own output section.  */
+
+	PROVIDE_HIDDEN (__exidx_start = .);
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > norflash
+	PROVIDE_HIDDEN (__exidx_end = .);
+
+	.data : {
+		_sdata = ABSOLUTE(.);
+		*(.data .data.*)
+		*(.gnu.linkonce.d.*)
+		CONSTRUCTORS
+		_edata = ABSOLUTE(.);
+	} > isram AT > norflash
+
+	_eronly = LOADADDR(.data);
+
+	.bss : {
+		_sbss = ABSOLUTE(.);
+		*(.bss .bss.*)
+		*(.gnu.linkonce.b.*)
+		*(COMMON)
+		_ebss = ABSOLUTE(.);
+	} > isram
+
+	/* Stabs debugging sections. */
+	.stab 0 : { *(.stab) }
+	.stabstr 0 : { *(.stabstr) }
+	.stab.excl 0 : { *(.stab.excl) }
+	.stab.exclstr 0 : { *(.stab.exclstr) }
+	.stab.index 0 : { *(.stab.index) }
+	.stab.indexstr 0 : { *(.stab.indexstr) }
+	.comment 0 : { *(.comment) }
+	.debug_abbrev 0 : { *(.debug_abbrev) }
+	.debug_info 0 : { *(.debug_info) }
+	.debug_line 0 : { *(.debug_line) }
+	.debug_pubnames 0 : { *(.debug_pubnames) }
+	.debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/nuttx/configs/sama5d3-xplained/scripts/pg-sram.ld b/nuttx/configs/sama5d3-xplained/scripts/pg-sram.ld
new file mode 100644
index 000000000..1c961b9ca
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/scripts/pg-sram.ld
@@ -0,0 +1,158 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/scripts/pg-isram.ld
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* The SAMA5D3 has 128 KB of ISRAM beginning at virtual address 0x0030:0000.
+ * The .text vitual address space begins at the same location as the physical
+ * address space:  0x0030:0000.  The virtual space is broken up into three
+ * regions:
+ *
+ *                                           PHYSICAL         VIRTUAL
+ *   NAME    DESCRIPTION                 SIZE    START    SIZE    START
+ *  -------- -------------------------- ----- ----------- ------- -----------
+ *   locked  Pages locked in memory.     40KB 0x0030:0000  40KB   0x0030:0000
+ *   paged   Pages in nonvolatile store. 48KB 0x0030:a000  48KB   0x0030:a000
+ *   data    .data/.bss/heap.            24KB 0x0031:6000  24KB   0x0031:6000
+ *           Reserved for page table     16KB 0x0031:c000  16KB   0x0031:c000
+ *  -------- -------------------------- ----- ----------- ------- -----------
+ *                                      128KB 0x0032 0000 128KB   0x0032 0000
+ *
+ * These region sizes must match the size in pages specified for each region
+ * in the NuttX configuration file:  CONFIG_PAGING_NLOCKED, CONFIG_PAGING_NVPAGED,
+ * and CONFIG_PAGING_NDATA.
+ *
+ * NOTE 1: The locked region is should be big here so that you can enable lots of
+ * debug output without overflowing the locked region.  32KB would probably be
+ * plenty if this were a real, optimized application.
+ *
+ * NOTE 2: Different compilers will compile the code to different sizes.  If you
+ * get a link time error saying that the locked region is full, you may have to
+ * re-organize this memory layout (here and in defconfig) to make the locked
+ * region even bigger.
+ *
+ * NOTE 3: Vectors in low memory are assumed and 16KB of ISRAM is reserved at
+ * the high end of ISRAM for the page table (?).
+ */
+
+MEMORY
+{
+    locked (rx) : ORIGIN = 0x00300000, LENGTH = 40K
+    paged  (rx) : ORIGIN = 0x0030a000, LENGTH = 48K
+    data   (rw) : ORIGIN = 0x00316000, LENGTH = 24K
+}
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(entry)
+ENTRY(_stext)
+
+SECTIONS
+{
+	.locked : {
+		_slocked = ABSOLUTE(.);
+		*(.vectors)
+		up_head.o locked.r (.text .text.*)
+		up_head.o locked.r (.fixup)
+		up_head.o locked.r (.gnu.warning)
+		up_head.o locked.r (.rodata .rodata.*)
+		up_head.o locked.r (.gnu.linkonce.t.*)
+		up_head.o locked.r (.glue_7)
+		up_head.o locked.r (.glue_7t)
+		up_head.o locked.r (.got)
+		up_head.o locked.r (.gcc_except_table)
+		up_head.o locked.r (.gnu.linkonce.r.*)
+		_elocked = ABSOLUTE(.);
+	} >locked
+
+	.init_section : {
+		_sinit = ABSOLUTE(.);
+		*(.init_array .init_array.*)
+		_einit = ABSOLUTE(.);
+	} > locked
+
+	/* .ARM.exidx is sorted, so has to go in its own output section.  */
+
+	PROVIDE_HIDDEN (__exidx_start = .);
+	.ARM.exidx :
+	{
+		*(.ARM.exidx* .gnu.linkonce.armexidx.*)
+	} > isram
+	PROVIDE_HIDDEN (__exidx_end = .);
+
+	.paged : {
+		_spaged = ABSOLUTE(.);
+		*(.text .text.*)
+		*(.fixup)
+		*(.gnu.warning)
+		*(.rodata .rodata.*)
+		*(.gnu.linkonce.t.*)
+		*(.glue_7)
+		*(.glue_7t)
+		*(.got)
+		*(.gcc_except_table)
+		*(.gnu.linkonce.r.*)
+		*(.ARM.extab*)
+		*(.gnu.linkonce.armextab.*)
+		_epaged = ABSOLUTE(.);
+	} > paged
+
+	.data : {
+		_sdata = ABSOLUTE(.);
+		*(.data .data.*)
+		*(.gnu.linkonce.d.*)
+		CONSTRUCTORS
+		_edata = ABSOLUTE(.);
+	} > data AT > locked
+
+	.bss : {
+		_sbss = ABSOLUTE(.);
+		*(.bss .bss.*)
+		*(.gnu.linkonce.b.*)
+		*(COMMON)
+		_ebss = ABSOLUTE(.);
+	} > data
+					/* Stabs debugging sections.	*/
+	.stab 0 : { *(.stab) }
+	.stabstr 0 : { *(.stabstr) }
+	.stab.excl 0 : { *(.stab.excl) }
+	.stab.exclstr 0 : { *(.stab.exclstr) }
+	.stab.index 0 : { *(.stab.index) }
+	.stab.indexstr 0 : { *(.stab.indexstr) }
+	.comment 0 : { *(.comment) }
+	.debug_abbrev 0 : { *(.debug_abbrev) }
+	.debug_info 0 : { *(.debug_info) }
+	.debug_line 0 : { *(.debug_line) }
+	.debug_pubnames 0 : { *(.debug_pubnames) }
+	.debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/nuttx/configs/sama5d3-xplained/src/Makefile b/nuttx/configs/sama5d3-xplained/src/Makefile
new file mode 100644
index 000000000..7872db7ac
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/Makefile
@@ -0,0 +1,188 @@
+############################################################################
+# configs/sama5d3-xplained/src/Makefile
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+-include $(TOPDIR)/Make.defs
+
+CFLAGS += -I$(TOPDIR)/sched
+
+ASRCS =
+AOBJS = $(ASRCS:.S=$(OBJEXT))
+
+CSRCS = sam_boot.c
+
+ifeq ($(CONFIG_HAVE_CXX),y)
+CSRCS += sam_cxxinitialize.c
+endif
+
+ifeq ($(CONFIG_SAMA5_SPI0),y)
+CSRCS += sam_spi.c
+else
+ifeq ($(CONFIG_SAMA5_SPI1),y)
+CSRCS += sam_spi.c
+endif
+endif
+
+ifeq ($(CONFIG_SAMA5_DDRCS),y)
+CSRCS += sam_sdram.c
+endif
+
+ifeq ($(CONFIG_SAMA5_EBICS0_NOR),y)
+CSRCS += sam_norflash.c
+endif
+
+ifeq ($(CONFIG_SAMA5_EBICS3_NAND),y)
+CSRCS += sam_nandflash.c
+endif
+
+ifeq ($(CONFIG_SAMA5D3XPLAINED_NOR_MAIN),y)
+CSRCS += nor_main.c
+endif
+
+ifeq ($(CONFIG_MTD_AT25),y)
+ifeq ($(CONFIG_SAMA5_SPI0),y)
+CSRCS += sam_at25.c
+endif
+endif
+
+ifeq ($(CONFIG_SAMA5_HSMCI0),y)
+CSRCS += sam_hsmci.c
+else
+ifeq ($(CONFIG_SAMA5_HSMCI1),y)
+CSRCS += sam_hsmci.c
+endif
+endif
+
+ifeq ($(CONFIG_SAMA5_UHPHS),y)
+CSRCS += sam_usb.c
+else
+ifeq ($(CONFIG_SAMA5_UDPHS),y)
+CSRCS += sam_usb.c
+endif
+endif
+
+ifeq ($(CONFIG_SAMA5_EMAC),y)
+CSRCS += sam_ethernet.c
+else
+ifeq ($(CONFIG_SAMA5_GMAC),y)
+CSRCS += sam_ethernet.c
+endif
+endif
+
+ifeq ($(CONFIG_NSH_ARCHINIT),y)
+CSRCS += sam_nsh.c
+endif
+
+ifeq ($(CONFIG_ADC),y)
+CSRCS += sam_adc.c
+endif
+
+ifeq ($(CONFIG_PWM),y)
+CSRCS += sam_pwm.c
+endif
+
+ifeq ($(CONFIG_CAN),y)
+CSRCS += sam_can.c
+endif
+
+ifeq ($(CONFIG_AUDIO_I2SCHAR),y)
+ifeq ($(CONFIG_SAMA5_SSC0),y)
+CSRCS += sam_i2schar.c
+else
+ifeq ($(CONFIG_SAMA5_SSC1),y)
+CSRCS += sam_i2schar.c
+endif
+endif
+endif
+
+ifeq ($(CONFIG_USBMSC),y)
+CSRCS += sam_usbmsc.c
+endif
+
+ifeq ($(CONFIG_ARCH_FPU),y)
+CSRCS += sam_ostest.c
+endif
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS += sam_autoleds.c
+else
+CSRCS += sam_userleds.c
+endif
+
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS += sam_buttons.c
+endif
+
+COBJS = $(CSRCS:.c=$(OBJEXT))
+
+SRCS = $(ASRCS) $(CSRCS)
+OBJS = $(AOBJS) $(COBJS)
+
+ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
+ifeq ($(WINTOOL),y)
+  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
+  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
+  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
+else
+  CFLAGS += -I$(ARCH_SRCDIR)/chip
+  CFLAGS += -I$(ARCH_SRCDIR)/common
+  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
+endif
+
+all: libboard$(LIBEXT)
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+libboard$(LIBEXT): $(OBJS)
+	$(call ARCHIVE, $@, $(OBJS))
+
+.depend: Makefile $(SRCS)
+	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+	$(Q) touch $@
+
+depend: .depend
+
+clean:
+	$(call DELFILE, libboard$(LIBEXT))
+	$(call CLEAN)
+
+distclean: clean
+	$(call DELFILE, Make.dep)
+	$(call DELFILE, .depend)
+
+-include Make.dep
diff --git a/nuttx/configs/sama5d3-xplained/src/nor_main.c b/nuttx/configs/sama5d3-xplained/src/nor_main.c
new file mode 100644
index 000000000..2c7120475
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/nor_main.c
@@ -0,0 +1,195 @@
+/*****************************************************************************
+ * configs/sama5d3-xplained/src/nor_main.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <debug.h>
+
+#include <arch/irq.h>
+
+#include "up_arch.h"
+#include "mmu.h"
+#include "cache.h"
+
+#include "sam_periphclks.h"
+#include "chip/sam_hsmc.h"
+#include "chip/sam_matrix.h"
+#include "chip/sam_aximx.h"
+
+#include "sama5d3-xplained.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define NOR_ENTRY ((nor_entry_t)SAM_EBICS0_VSECTION)
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+typedef void (*nor_entry_t)(void);
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nor_main
+ *
+ * Description:
+ *   nor_main is a tiny program that runs in ISRAM.  nor_main will enable
+ *   NOR flash then jump to the program in NOR flash
+ *
+ ****************************************************************************/
+
+int nor_main(int argc, char *argv)
+{
+  uint32_t regval;
+
+#ifdef CONFIG_SAMA5D3XPLAINED_NOR_START
+  printf("Configuring and booting from NOR FLASH on CS0\n");
+#else
+  printf("Configuring NOR FLASH on CS0 and halting\n");
+#endif
+
+  /* Make sure that the SMC peripheral is enabled (But of course it is... we
+   * are executing from NOR FLASH now).
+   */
+
+  sam_hsmc_enableclk();
+
+  /* The SAMA5D3-Xplained has 118MB of 16-bit NOR FLASH at CS0.  The NOR FLASH
+   * has already been configured by the first level ROM bootloader... we
+   * simply need to modify the timing here.
+   */
+
+  regval = HSMC_SETUP_NWE_SETUP(1) |  HSMC_SETUP_NCS_WRSETUP(0) |
+           HSMC_SETUP_NRD_SETUP(2) | HSMC_SETUP_NCS_RDSETUP(0);
+  putreg32(regval, SAM_HSMC_SETUP(HSMC_CS0));
+
+  regval = HSMC_PULSE_NWE_PULSE(10) | HSMC_PULSE_NCS_WRPULSE(10) |
+           HSMC_PULSE_NRD_PULSE(11) | HSMC_PULSE_NCS_RDPULSE(11);
+  putreg32(regval, SAM_HSMC_PULSE(HSMC_CS0));
+
+  regval = HSMC_CYCLE_NWE_CYCLE(11) | HSMC_CYCLE_NRD_CYCLE(14);
+  putreg32(regval, SAM_HSMC_CYCLE(HSMC_CS0));
+
+  regval = HSMC_TIMINGS_TCLR(0) | HSMC_TIMINGS_TADL(0) |
+           HSMC_TIMINGS_TAR(0) | HSMC_TIMINGS_TRR(0) |
+           HSMC_TIMINGS_TWB(0) | HSMC_TIMINGS_RBNSEL(0);
+  putreg32(regval, SAM_HSMC_TIMINGS(HSMC_CS0));
+
+  regval = HSMC_MODE_READMODE | HSMC_MODE_WRITEMODE |
+           HSMC_MODE_EXNWMODE_DISABLED | HSMC_MODE_BIT_16 |
+           HSMC_MODE_TDFCYCLES(1);
+  putreg32(regval, SAM_HSMC_MODE(HSMC_CS0));
+
+  /* Interrupts must be disabled through the following.  In this configuration,
+   * there should only be timer interrupts.  Your NuttX configuration must use
+   * CONFIG_SERIAL_LOWCONSOLE=y or printf() will hang when the interrupts
+   * are disabled!
+   */
+
+  (void)irqsave();
+
+  /* Disable MATRIX write protection */
+
+#if 0 /* Disabled on reset */
+  putreg32(MATRIX_WPMR_WPKEY, SAM_MATRIX_WPMR);
+#endif
+
+  /* Set remap state 1.
+   *
+   *   Boot state:    ROM is seen at address 0x00000000
+   *   Remap State 0: SRAM is seen at address 0x00000000 (through AHB slave
+   *                  interface) instead of ROM.
+   *   Remap State 1: HEBI is seen at address 0x00000000 (through AHB slave
+   *                  interface) instead of ROM for external boot.
+   *
+   * REVISIT:  This does not work.  No matter what I do, the internal
+   * SRAM is always visible at address zero.  I am missing something.
+   */
+
+  putreg32(MATRIX_MRCR_RCB0, SAM_MATRIX_MRCR);   /* Enable remap */
+  putreg32(AXIMX_REMAP_REMAP1, SAM_AXIMX_REMAP); /* Remap HEBI */
+
+  /* Restore MATRIX write protection */
+
+#if 0 /* Disabled on reset */
+  putreg32(MATRIX_WPMR_WPKEY | MATRIX_WPMR_WPEN, SAM_MATRIX_WPMR);
+#endif
+
+  /* Disable the caches and the MMU.  Disabling the MMU should be safe here
+   * because there is a 1-to-1 identity mapping between the physical and
+   * virtual addressing.
+   */
+
+  /* NOTE:  This generates crashes and lots of error, but does leave the
+   * system in the proper state to run from NOR:  very ugly but usable.
+   * Better than the alternative.
+   */
+
+  cp15_disable_mmu();
+  cp15_disable_caches();
+
+  /* Invalidate caches and TLBs */
+
+  cp15_invalidate_icache();
+  cp15_invalidate_dcache_all();
+  cp15_invalidate_tlbs();
+
+#ifdef CONFIG_SAMA5D3XPLAINED_NOR_START
+  /* Then jump into NOR flash */
+
+  NOR_ENTRY();
+
+#else
+  /* Or just wait patiently for the user to break in with GDB. */
+
+  for (;;);
+#endif
+
+  return 0; /* We should not get here in either case */
+}
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_adc.c b/nuttx/configs/sama5d3-xplained/src/sam_adc.c
new file mode 100644
index 000000000..4b1b14674
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_adc.c
@@ -0,0 +1,118 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/up_adc.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/analog/adc.h>
+
+#include "sam_adc.h"
+#include "sama5d3-xplained.h"
+
+#ifdef CONFIG_ADC
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+/* Configuration ********************************************************************/
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: adc_devinit
+ *
+ * Description:
+ *   All STM32 architectures must provide the following interface to work with
+ *   examples/adc.
+ *
+ ************************************************************************************/
+
+int adc_devinit(void)
+{
+#ifdef CONFIG_SAMA5_ADC
+  static bool initialized = false;
+  struct adc_dev_s *adc;
+  int ret;
+
+  /* Check if we have already initialized */
+
+  if (!initialized)
+    {
+      /* Call stm32_adcinitialize() to get an instance of the ADC interface */
+
+      adc = sam_adc_initialize();
+      if (adc == NULL)
+        {
+          adbg("ERROR: Failed to get ADC interface\n");
+          return -ENODEV;
+        }
+
+      /* Register the ADC driver at "/dev/adc0" */
+
+      ret = adc_register("/dev/adc0", adc);
+      if (ret < 0)
+        {
+          adbg("adc_register failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+#else
+  return -ENOSYS;
+#endif
+}
+
+#endif /* CONFIG_ADC */
\ No newline at end of file
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_at25.c b/nuttx/configs/sama5d3-xplained/src/sam_at25.c
new file mode 100644
index 000000000..8fbe23301
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_at25.c
@@ -0,0 +1,140 @@
+/****************************************************************************
+ * config/sama5d3-xplained/src/sam_at25.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/mount.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/spi/spi.h>
+#include <nuttx/mtd/mtd.h>
+#include <nuttx/fs/nxffs.h>
+
+#include "sam_spi.h"
+#include "sama5d3-xplained.h"
+
+#ifdef HAVE_AT25
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_at25_automount
+ *
+ * Description:
+ *   Initialize and configure the AT25 serial FLASH
+ *
+ ****************************************************************************/
+
+int sam_at25_automount(int minor)
+{
+  FAR struct spi_dev_s *spi;
+  FAR struct mtd_dev_s *mtd;
+  static bool initialized = false;
+  int ret;
+
+  /* Have we already initialized? */
+
+  if (!initialized)
+    {
+      /* No.. Get the SPI port driver */
+
+      spi = up_spiinitialize(AT25_PORT);
+      if (!spi)
+        {
+          fdbg("ERROR: Failed to initialize SPI port %d\n", AT25_PORT);
+          return -ENODEV;
+        }
+
+      /* Now bind the SPI interface to the AT25 SPI FLASH driver */
+
+      mtd = at25_initialize(spi);
+      if (!mtd)
+        {
+          fdbg("ERROR: Failed to bind SPI port %d to the AT25 FLASH driver\n");
+          return -ENODEV;
+        }
+
+#if defined(CONFIG_SAMA5D3XPLAINED_AT25_FTL)
+      /* And finally, use the FTL layer to wrap the MTD driver as a block driver */
+
+      ret = ftl_initialize(AT25_MINOR, mtd);
+      if (ret < 0)
+        {
+          fdbg("ERROR: Failed to initialize the FTL layer: %d\n", ret);
+          return ret;
+        }
+
+#elif defined(CONFIG_SAMA5D3XPLAINED_AT25_NXFFS)
+      /* Initialize to provide NXFFS on the MTD interface */
+
+      ret = nxffs_initialize(mtd);
+      if (ret < 0)
+        {
+          fdbg("ERROR: NXFFS initialization failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Mount the file system at /mnt/at25 */
+
+      ret = mount(NULL, "/mnt/at25", "nxffs", 0, NULL);
+      if (ret < 0)
+        {
+          fdbg("ERROR: Failed to mount the NXFFS volume: %d\n", errno);
+          return ret;
+        }
+#endif
+      /* Now we are initializeed */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+#endif /* HAVE_AT25 */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_autoleds.c b/nuttx/configs/sama5d3-xplained/src/sam_autoleds.c
new file mode 100644
index 000000000..73429e816
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_autoleds.c
@@ -0,0 +1,173 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/src/sam_autoleds.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+/* There are two LEDs on the SAMA5D3 series-CM board that can be controlled
+ * by software.  A  blue LED is controlled via PIO pins.  A red LED normally
+ * provides an indication that power is supplied to the board but can also
+ * be controlled via software.
+ *
+ *   PE25.  This blue LED is pulled high and is illuminated by pulling PE25
+ *   low.
+ *
+ *   PE24.  The red LED is also pulled high but is driven by a transistor so
+ *   that it is illuminated when power is applied even if PE24 is not
+ *   configured as an output.  If PE24 is configured as an output, then the
+ *   LCD is illuminated by a low output.
+ *
+ * These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
+ * defined.  In that case, the usage by the board port is defined in
+ * include/board.h and src/sam_leds.c. The LEDs are used to encode OS-related
+ * events as follows:
+ *
+ *   SYMBOL            Val Meaning                     LED state
+ *                                                    Blue     Red
+ *   ----------------- --- -----------------------  -------- --------
+ *   LED_STARTED        0  NuttX has been started     OFF      OFF
+ *   LED_HEAPALLOCATE   0  Heap has been allocated    OFF      OFF
+ *   LED_IRQSENABLED    0  Interrupts enabled         OFF      OFF
+ *   LED_STACKCREATED   1  Idle stack created         ON       OFF
+ *   LED_INIRQ          2  In an interrupt              No change
+ *   LED_SIGNAL         2  In a signal handler          No change
+ *   LED_ASSERTION      2  An assertion failed          No change
+ *   LED_PANIC          3  The system has crashed     OFF      Blinking
+ *   LED_IDLE          N/A MCU is is sleep mode         Not used
+ *
+ * Thus if the blue LED is statically on, NuttX has successfully booted and
+ * is, apparently, running normmally.  If the red is flashing at
+ * approximately 2Hz, then a fatal error has been detected and the system
+ * has halted.
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <arch/board/board.h>
+
+#include "sam_pio.h"
+#include "sama5d3-xplained.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
+ * with CONFIG_DEBUG_VERBOSE too)
+ */
+
+#ifdef CONFIG_DEBUG_LEDS
+#  define leddbg  lldbg
+#  define ledvdbg llvdbg
+#else
+#  define leddbg(x...)
+#  define ledvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_led_initialize
+ ****************************************************************************/
+
+void board_led_initialize(void)
+{
+  /* Configure LED PIOs for output */
+
+  sam_configpio(PIO_BLUE);
+  sam_configpio(PIO_RED);
+}
+
+/****************************************************************************
+ * Name: board_led_on
+ ****************************************************************************/
+
+void board_led_on(int led)
+{
+  bool blueoff = true;  /* Low illuminates */
+  bool redon   = false; /* High illuminates */
+
+  switch (led)
+    {
+      case 0:  /* LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED */
+        break;
+
+      case 1:  /* LED_STACKCREATED */
+        blueoff = false;
+        break;
+
+      default:
+      case 2:  /* LED_INIRQ, LED_SIGNAL, LED_ASSERTION */
+        return;
+
+      case 3:  /* LED_PANIC */
+        redon = true;
+        break;
+    }
+
+  sam_piowrite(PIO_BLUE, blueoff);
+  sam_piowrite(PIO_RED, redon);
+}
+
+/****************************************************************************
+ * Name: board_led_off
+ ****************************************************************************/
+
+void board_led_off(int led)
+{
+  if (led != 2)
+    {
+      sam_piowrite(PIO_BLUE, true);  /* Low illuminates */
+      sam_piowrite(PIO_RED, false);  /* High illuminates */
+    }
+}
+
+#endif /* CONFIG_ARCH_LEDS */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_boot.c b/nuttx/configs/sama5d3-xplained/src/sam_boot.c
new file mode 100644
index 000000000..fd651bf27
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_boot.c
@@ -0,0 +1,150 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sam_boot.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include "sama5d3-xplained.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_boardinitialize
+ *
+ * Description:
+ *   All SAMA5 architectures must provide the following entry point.  This entry
+ *   point is called early in the intitialization -- after all memory has been
+ *   configured and mapped but before any devices have been initialized.
+ *
+ ************************************************************************************/
+
+void sam_boardinitialize(void)
+{
+  /* Configure SPI chip selects if 1) SPI is enable, and 2) the weak function
+   * sam_spiinitialize() has been brought into the link.
+   */
+
+#if defined(CONFIG_SAMA5_SPI0) || defined(CONFIG_SAMA5_SPI1)
+  if (sam_spiinitialize)
+    {
+      sam_spiinitialize();
+    }
+#endif
+
+#if defined(CONFIG_SAMA5_DDRCS) && !defined(CONFIG_SAMA5_BOOT_SDRAM)
+
+  /* Configure SDRAM if (1) SDRAM has been enalbled in the NuttX configuration and
+   * (2) if we are not currently running out of SDRAM.  If we are now running out
+   * of SDRAM then we have to assume that some second level bootloader has properly
+   * configured SDRAM for our use.
+   */
+
+  sam_sdram_config();
+
+#endif
+
+  /* Initialize USB if the 1) the HS host or device controller is in the
+   * configuration and 2) the weak function sam_usbinitialize() has been brought
+   * into the build. Presumeably either CONFIG_USBDEV or CONFIG_USBHOST is also
+   * selected.
+   */
+
+#if defined(CONFIG_SAMA5_UHPHS) || defined(CONFIG_SAMA5_UDPHS)
+  if (sam_usbinitialize)
+    {
+      sam_usbinitialize();
+    }
+#endif
+
+  /* Configure board resources to support networkingif the 1) networking is enabled,
+   * 2) the EMAC or GMAC module is enabled, and 2) the weak function
+   * sam_netinitialize() has been brought into the build.
+   */
+
+#ifdef HAVE_NETWORK
+  if (sam_netinitialize)
+    {
+      sam_netinitialize();
+    }
+#endif
+
+#ifdef CONFIG_ARCH_LEDS
+  /* Configure on-board LEDs if LED support has been selected. */
+
+  board_led_initialize();
+#endif
+}
+
+/****************************************************************************
+ * Name: board_initialize
+ *
+ * Description:
+ *   If CONFIG_BOARD_INITIALIZE is selected, then an additional
+ *   initialization call will be performed in the boot-up sequence to a
+ *   function called board_initialize().  board_initialize() will be
+ *   called immediately after up_intiialize() is called and just before the
+ *   initial application is started.  This additional initialization phase
+ *   may be used, for example, to initialize board-specific device drivers.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARD_INITIALIZE
+void board_initialize(void)
+{
+  /* Perform NSH initialization here instead of from the NSH.  This
+   * alternative NSH initialization is necessary when NSH is ran in user-space
+   * but the initialization function must run in kernel space.
+   */
+
+#if defined(CONFIG_NSH_LIBRARY) && !defined(CONFIG_NSH_ARCHINIT)
+  (void)nsh_archinitialize();
+#endif
+}
+#endif /* CONFIG_BOARD_INITIALIZE */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_buttons.c b/nuttx/configs/sama5d3-xplained/src/sam_buttons.c
new file mode 100644
index 000000000..15ef81938
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_buttons.c
@@ -0,0 +1,172 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/src/sam_buttons.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+/* There are five push button switches on the SAMA5D3-Xplained base board:
+ *
+ *   1. One Reset, board reset (BP1)
+ *   2. One Wake up, push button to bring the processor out of low power mode
+ *     (BP2)
+ *   3. One User momentary Push Button
+ *   4. One Disable CS Push Button
+ *
+ * Only the momentary push button is controllable by software (labeled
+ * "PB_USER1" on the board):
+ *
+ *   - PE27.  Pressing the switch connect PE27 to grounded.  Therefore, PE27
+ *     must be pulled high internally.  When the button is pressed the SAMA5
+ *     will sense "0" is on PE27.
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/irq.h>
+
+#include <arch/irq.h>
+#include <arch/board/board.h>
+
+#include "sam_pio.h"
+#include "sama5d3-xplained.h"
+
+#ifdef CONFIG_ARCH_BUTTONS
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#if defined(CONFIG_SAMA5_PIOE_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
+static xcpt_t g_irquser1;
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.  After
+ *   that, board_buttons() may be called to collect the current state of all
+ *   buttons or board_button_irq() may be called to register button interrupt
+ *   handlers.
+ *
+ ****************************************************************************/
+
+void board_button_initialize(void)
+{
+  (void)sam_configpio(PIO_USER1);
+}
+
+/****************************************************************************
+ * Name: board_buttons
+ *
+ * Description:
+ *   After board_button_initialize() has been called, board_buttons() may be called to
+ *   collect the state of all buttons.  board_buttons() returns an 8-bit bit set
+ *   with each bit associated with a button.  See the BUTTON* definitions
+ *   above for the meaning of each bit in the returned value.
+ *
+ ****************************************************************************/
+
+uint8_t board_buttons(void)
+{
+  return sam_pioread(PIO_USER1) ? 0 : BUTTON_USER1_BIT;
+}
+
+/****************************************************************************
+ * Name: board_button_irq
+ *
+ * Description:
+ *   This function may be called to register an interrupt handler that will
+ *   be called when a button is depressed or released.  The ID value is one
+ *   of the BUTTON* definitions provided above. The previous interrupt
+ *   handler address isreturned (so that it may restored, if so desired).
+ *
+ * Configuration Notes:
+ *   Configuration CONFIG_SAMA5_PIO_IRQ must be selected to enable the
+ *   overall PIO IRQ feature and CONFIG_SAMA5_PIOE_IRQ must be enabled to
+ *   select PIOs to support interrupts on PIOE.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_SAMA5_PIOE_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
+xcpt_t board_button_irq(int id, xcpt_t irqhandler)
+{
+  xcpt_t oldhandler = NULL;
+
+  if (id == BUTTON_USER1)
+    {
+      irqstate_t flags;
+
+      /* Disable interrupts until we are done.  This guarantees that the
+       * following operations are atomic.
+       */
+
+      flags = irqsave();
+
+      /* Get the old button interrupt handler and save the new one */
+
+      oldhandler = g_irquser1;
+      g_irquser1 = irqhandler;
+
+      /* Configure the interrupt */
+
+      sam_pioirq(IRQ_USER1);
+      (void)irq_attach(IRQ_USER1, irqhandler);
+      sam_pioirqenable(IRQ_USER1);
+      irqrestore(flags);
+    }
+
+  /* Return the old button handler (so that it can be restored) */
+
+  return oldhandler;
+}
+#endif
+
+#endif /* CONFIG_ARCH_BUTTONS */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_can.c b/nuttx/configs/sama5d3-xplained/src/sam_can.c
new file mode 100644
index 000000000..24b3e2468
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_can.c
@@ -0,0 +1,140 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/up_can.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/can.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "up_arch.h"
+
+#include "sam_can.h"
+#include "sama5d3-xplained.h"
+
+#if defined(CONFIG_CAN) && (defined(CONFIG_SAMA5_CAN0) || defined(CONFIG_SAMA5_CAN1))
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* Configuration ********************************************************************/
+
+#if defined(CONFIG_SAMA5_CAN0) && defined(CONFIG_SAMA5_CAN1)
+#  warning "Both CAN0 and CAN1 are enabled.  Assuming only CAN0."
+#  undef CONFIG_SAMA5_CAN1
+#endif
+
+#ifdef CONFIG_SAMA5_CAN0
+#  define CAN_PORT 0
+#else
+#  define CAN_PORT 1
+#endif
+
+/* Debug ***************************************************************************/
+/* Non-standard debug that may be enabled just for testing CAN */
+
+#ifdef CONFIG_DEBUG_CAN
+#  define candbg    dbg
+#  define canvdbg   vdbg
+#  define canlldbg  lldbg
+#  define canllvdbg llvdbg
+#else
+#  define candbg(x...)
+#  define canvdbg(x...)
+#  define canlldbg(x...)
+#  define canllvdbg(x...)
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: can_devinit
+ *
+ * Description:
+ *   All STM32 architectures must provide the following interface to work with
+ *   examples/can.
+ *
+ ************************************************************************************/
+
+int can_devinit(void)
+{
+  static bool initialized = false;
+  struct can_dev_s *can;
+  int ret;
+
+  /* Check if we have already initialized */
+
+  if (!initialized)
+    {
+      /* Call stm32_caninitialize() to get an instance of the CAN interface */
+
+      can = sam_caninitialize(CAN_PORT);
+      if (can == NULL)
+        {
+          candbg("ERROR:  Failed to get CAN interface\n");
+          return -ENODEV;
+        }
+
+      /* Register the CAN driver at "/dev/can0" */
+
+      ret = can_register("/dev/can0", can);
+      if (ret < 0)
+        {
+          candbg("ERROR: can_register failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+#endif /* CONFIG_CAN && (CONFIG_SAMA5_CAN0 || CONFIG_SAMA5_CAN1) */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_cxxinitialize.c b/nuttx/configs/sama5d3-xplained/src/sam_cxxinitialize.c
new file mode 100644
index 000000000..b7bfc3e06
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_cxxinitialize.c
@@ -0,0 +1,153 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sam_cxxinitialize.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include <nuttx/arch.h>
+
+#include <arch/sama5/chip.h>
+#include "chip.h"
+
+#if defined(CONFIG_HAVE_CXX) && defined(CONFIG_HAVE_CXXINITIALIZE)
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+/* Debug ****************************************************************************/
+/* Non-standard debug that may be enabled just for testing the static constructors */
+
+#ifndef CONFIG_DEBUG
+#  undef CONFIG_DEBUG_CXX
+#endif
+
+#ifdef CONFIG_DEBUG_CXX
+#  define cxxdbg              dbg
+#  define cxxlldbg            lldbg
+#  ifdef CONFIG_DEBUG_VERBOSE
+#    define cxxvdbg           vdbg
+#    define cxxllvdbg         llvdbg
+#  else
+#    define cxxvdbg(x...)
+#    define cxxllvdbg(x...)
+#  endif
+#else
+#  define cxxdbg(x...)
+#  define cxxlldbg(x...)
+#  define cxxvdbg(x...)
+#  define cxxllvdbg(x...)
+#endif
+
+/************************************************************************************
+ * Private Types
+ ************************************************************************************/
+/* This type defines one entry in initialization array */
+
+typedef void (*initializer_t)(void);
+
+/************************************************************************************
+ * External references
+ ************************************************************************************/
+/* _sinit and _einit are symbols exported by the linker script that mark the
+ * beginning and the end of the C++ initialization section.
+ */
+
+extern initializer_t _sinit;
+extern initializer_t _einit;
+
+/* _stext and _etext are symbols exported by the linker script that mark the
+ * beginning and the end of text.
+ */
+
+extern uint32_t _stext;
+extern uint32_t _etext;
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/****************************************************************************
+ * Name: up_cxxinitialize
+ *
+ * Description:
+ *   If C++ and C++ static constructors are supported, then this function
+ *   must be provided by board-specific logic in order to perform
+ *   initialization of the static C++ class instances.
+ *
+ *   This function should then be called in the application-specific
+ *   user_start logic in order to perform the C++ initialization.  NOTE
+ *   that no component of the core NuttX RTOS logic is involved; This
+ *   function defintion only provides the 'contract' between application
+ *   specific C++ code and platform-specific toolchain support
+ *
+ ***************************************************************************/
+
+void up_cxxinitialize(void)
+{
+  initializer_t *initp;
+
+  cxxdbg("_sinit: %p _einit: %p _stext: %p _etext: %p\n",
+         &_sinit, &_einit, &_stext, &_etext);
+
+  /* Visit each entry in the initialzation table */
+
+  for (initp = &_sinit; initp != &_einit; initp++)
+    {
+      initializer_t initializer = *initp;
+      cxxdbg("initp: %p initializer: %p\n", initp, initializer);
+
+      /* Make sure that the address is non-NULL and lies in the text region
+       * defined by the linker script.  Some toolchains may put NULL values
+       * or counts in the initialization table
+       */
+
+      if ((void*)initializer > (void*)&_stext && (void*)initializer < (void*)&_etext)
+        {
+          cxxdbg("Calling %p\n", initializer);
+          initializer();
+        }
+    }
+}
+
+#endif /* CONFIG_HAVE_CXX && CONFIG_HAVE_CXXINITIALIZE */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_ethernet.c b/nuttx/configs/sama5d3-xplained/src/sam_ethernet.c
new file mode 100644
index 000000000..2f337689e
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_ethernet.c
@@ -0,0 +1,186 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sam_ethernet.c
+ *
+ *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/irq.h>
+
+#include "sam_pio.h"
+#include "sam_ethernet.h"
+
+#ifdef HAVE_NETWORK
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+#ifdef CONFIG_SAMA5_PIOE_IRQ
+#ifdef CONFIG_SAMA5_EMAC
+static xcpt g_emac_handler;
+#endif
+#ifdef CONFIG_SAMA5_GMAC
+static xcpt g_gmac_handler;
+#endif
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_netinitialize
+ *
+ * Description:
+ *   Configure board resources to support networking.
+ *
+ ************************************************************************************/
+
+void weak_function sam_netinitialize(void)
+{
+#ifdef CONFIG_SAMA4_EMAC
+  /* Ethernet 10/100 (EMAC) Port
+   *
+   * The main board contains a MICREL PHY device (KSZ8051) operating at 10/100 Mbps.
+   * The board supports MII and RMII interface modes.
+   *
+   * The two independent PHY devices embedded on CM and MB boards are connected to
+   * independent RJ-45 connectors with built-in magnetic and status LEDs.
+   *
+   * At the De-Assertion of Reset:
+   *   PHY ADD[2:0]:001
+   *   CONFIG[2:0]:001,Mode:RMII
+   *   Duplex Mode:Half Duplex
+   *   Isolate Mode:Disable
+   *   Speed Mode:100Mbps
+   *   Nway Auto-Negotiation:Enable
+   *
+   * The KSZ8051 PHY interrtup is available on PE30 INT_ETH1
+  */
+
+  sam_configpio(PIO_INT_ETH1);
+#endif
+
+#ifdef CONFIG_SAMA4_GMAC
+  /* Tri-Speed Ethernet PHY
+   *
+   * The SAMA5D3 series-CM board is equipped with a MICREL PHY devices (MICREL
+   * KSZ9021/31) operating at 10/100/1000 Mbps. The board supports RGMII interface
+   * mode. The Ethernet interface consists of 4 pairs of low voltage differential
+   * pair signals designated from GRX± and GTx± plus control signals for link
+   * activity indicators. These signals can be used to connect to a 10/100/1000
+   * BaseT RJ45 connector integrated on the main board.
+   *
+   * The KSZ9021/31 interrupt is available on PB35 INT_GETH0
+   */
+
+  sam_configpio(PIO_INT_ETH0);
+#endif
+}
+
+/************************************************************************************
+ * Name: sam_phyirq
+ *
+ * Description:
+ *   This function may be called to register an interrupt handler that will be
+ *   called when an interrupt is received from a PHY.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_SAMA5_PIOE_IRQ
+xcpt_t sam_phyirq(int intf, xcpt_t irqhandler)
+{
+  irqstate_t flags;
+  xcpt_t *handler;
+  xcpt_t oldhandler;
+  int irq;
+
+#ifdef CONFIG_SAMA5_EMAC
+  if (intf == EMAC_INTF)
+    {
+      handler = &g_emac_handler;
+      irq     = IRQ_INT_ETH1;
+    }
+  else
+#endif
+#ifdef CONFIG_SAMA5_GMAC
+  if (intf == GMAC_INTF)
+    {
+      handler = &g_gmac_handler;
+      irq     = IRQ_INT_ETH0;
+    }
+  else
+#endif
+    {
+      ndbg("Unsupported interface: %d\n", intf);
+      return NULL;
+    }
+
+  /* Disable interrupts until we are done.  This guarantees that the
+   * following operations are atomic.
+   */
+
+  flags = irqsave();
+
+  /* Get the old button interrupt handler and save the new one */
+
+  oldhandler = *handler;
+  *handler = irqhandler;
+
+  /* Configure the interrupt */
+
+  sam_pioirq(irq);
+  (void)irq_attach(irq, irqhandler);
+  sam_pioirqenable(irq);
+
+  /* Return the old button handler (so that it can be restored) */
+
+  irqrestore(flags);
+  return oldhandler;
+}
+#endif /* CONFIG_SAMA5_PIOE_IRQ */
+
+#endif /* HAVE_NETWORK */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_hsmci.c b/nuttx/configs/sama5d3-xplained/src/sam_hsmci.c
new file mode 100644
index 000000000..4ce0d6da3
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_hsmci.c
@@ -0,0 +1,344 @@
+/****************************************************************************
+ * config/sama5d3-xplained/src/sam_hsmci.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+/* The SAMA5D3-Xplained provides a two SD memory card slots:  (1) a full size SD card
+ * slot (J10), and (2) a microSD memory card slot (J11).
+ *
+ * The full size SD card slot connects via HSMCI0.  The card detect discrete
+ * is available on PB17 (pulled high).  The write protect descrete is tied to
+ * ground (via PP6) and not available to software.  The slot supports 8-bit
+ * wide transfer mode, but the NuttX driver currently uses only the 4-bit
+ * wide transfer mode
+ *
+ *   PD17 MCI0_CD
+ *   PD1  MCI0_DA0
+ *   PD2  MCI0_DA1
+ *   PD3  MCI0_DA2
+ *   PD4  MCI0_DA3
+ *   PD5  MCI0_DA4
+ *   PD6  MCI0_DA5
+ *   PD7  MCI0_DA6
+ *   PD8  MCI0_DA7
+ *   PD9  MCI0_CK
+ *   PD0  MCI0_CDA
+ *
+ * The microSD connects vi HSMCI1.  The card detect discrete is available on
+ * PB18 (pulled high):
+ *
+ *   PD18  MCI1_CD
+ *   PB20  MCI1_DA0
+ *   PB21  MCI1_DA1
+ *   PB22  MCI1_DA2
+ *   PB23  MCI1_DA3
+ *   PB24  MCI1_CK
+ *   PB19  MCI1_CDA
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/sdio.h>
+#include <nuttx/mmcsd.h>
+
+#include "sam_pio.h"
+#include "sam_hsmci.h"
+
+#include "sama5d3-xplained.h"
+
+#ifdef HAVE_HSMCI
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+/* This structure holds static information unique to one HSMCI peripheral */
+
+struct sam_hsmci_state_s
+{
+  struct sdio_dev_s *hsmci;   /* R/W device handle */
+  pio_pinset_t pincfg;        /* Card detect PIO pin configuratin */
+  uint8_t irq;                /* Interrupt number (same as pid) */
+  uint8_t slotno;             /* Slot number */
+  bool cd;                    /* TRUE: card is inserted */
+  xcpt_t handler;             /* Interrupt handler */
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* HSCMI device state */
+
+#ifdef CONFIG_SAMA5_HSMCI0
+static int sam_hsmci0_cardetect(int irq, void *regs);
+
+static struct sam_hsmci_state_s g_hsmci0 =
+{
+  .pincfg  = PIO_MCI0_CD,
+  .irq     = IRQ_MCI0_CD,
+  .slotno  = 0,
+  .handler = sam_hsmci0_cardetect,
+};
+#endif
+
+#ifdef CONFIG_SAMA5_HSMCI1
+static int sam_hsmci1_cardetect(int irq, void *regs);
+
+static struct sam_hsmci_state_s g_hsmci1 =
+{
+  .pincfg  = PIO_MCI1_CD,
+  .irq     = IRQ_MCI1_CD,
+  .slotno  = 1,
+  .handler = sam_hsmci1_cardetect,
+};
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_cardinserted_internal
+ *
+ * Description:
+ *   Check if a card is inserted into the selected HSMCI slot
+ *
+ ****************************************************************************/
+
+bool sam_cardinserted_internal(struct sam_hsmci_state_s *state)
+{
+  bool inserted;
+
+  /* Get the state of the PIO pin */
+
+  inserted = sam_pioread(state->pincfg);
+  fllvdbg("Slot %d inserted: %s\n", state->slotno, inserted ? "NO" : "YES");
+  return !inserted;
+}
+
+/****************************************************************************
+ * Name: sam_hsmci_cardetect, sam_hsmci0_cardetect, and sam_hsmci1_cardetect
+ *
+ * Description:
+ *   Card detect interrupt handlers
+ *
+ ****************************************************************************/
+
+static int sam_hsmci_cardetect(struct sam_hsmci_state_s *state)
+{
+  /* Get the current card insertion state */
+
+  bool cd = sam_cardinserted_internal(state);
+
+  /* Has the card detect state changed? */
+
+  if (cd != state->cd)
+    {
+      /* Yes... remember that new state and inform the HSMCI driver */
+
+      state->cd = cd;
+
+      /* Report the new state to the SDIO driver */
+
+      sdio_mediachange(state->hsmci, cd);
+    }
+
+   return OK;
+}
+
+#ifdef CONFIG_SAMA5_HSMCI0
+static int sam_hsmci0_cardetect(int irq, void *regs)
+{
+  return sam_hsmci_cardetect(&g_hsmci0);
+}
+#endif
+
+#ifdef CONFIG_SAMA5_HSMCI1
+static int sam_hsmci1_cardetect(int irq, void *regs)
+{
+  return sam_hsmci_cardetect(&g_hsmci1);
+}
+#endif
+
+/****************************************************************************
+ * Name: sam_hsmci_state
+ *
+ * Description:
+ *   Initialize HSMCI PIOs.
+ *
+ ****************************************************************************/
+
+static struct sam_hsmci_state_s *sam_hsmci_state(int slotno)
+{
+  struct sam_hsmci_state_s *state = NULL;
+
+#ifdef CONFIG_SAMA5_HSMCI0
+#ifdef CONFIG_SAMA5_HSMCI1
+  if (slotno == 0)
+#endif
+    {
+      state = &g_hsmci0;
+    }
+#ifdef CONFIG_SAMA5_HSMCI1
+  else
+#endif
+#endif
+
+#ifdef CONFIG_SAMA5_HSMCI1
+    {
+      state = &g_hsmci1;
+    }
+#endif
+
+  return state;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_hsmci_initialize
+ *
+ * Description:
+ *   Perform architecture specific initialization
+ *
+ ****************************************************************************/
+
+int sam_hsmci_initialize(int slotno, int minor)
+{
+  struct sam_hsmci_state_s *state;
+  int ret;
+
+  /* Get the static HSMI description */
+
+  state = sam_hsmci_state(slotno);
+  if (!state)
+    {
+      fdbg("No state for slotno %d\n", slotno);
+      return -EINVAL;
+    }
+
+  /* Initialize card-detect and write-protect PIOs */
+
+  sam_configpio(state->pincfg);
+
+  /* Mount the SDIO-based MMC/SD block driver */
+  /* First, get an instance of the SDIO interface */
+
+  state->hsmci = sdio_initialize(slotno);
+  if (!state->hsmci)
+    {
+      fdbg("Failed to initialize SDIO slot %d\n",  slotno);
+      return -ENODEV;
+    }
+
+  /* Now bind the SDIO interface to the MMC/SD driver */
+
+  ret = mmcsd_slotinitialize(minor, state->hsmci);
+  if (ret != OK)
+    {
+      fdbg("Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
+      return ret;
+    }
+
+  /* Configure card detect interrupts */
+
+  sam_pioirq(state->pincfg);
+  (void)irq_attach(state->irq, state->handler);
+
+  /* Then inform the HSMCI driver if there is or is not a card in the slot. */
+
+  state->cd = sam_cardinserted_internal(state);
+  sdio_mediachange(state->hsmci, state->cd);
+
+  /* Enable card detect interrupts */
+
+  sam_pioirqenable(state->irq);
+  return OK;
+}
+
+/****************************************************************************
+ * Name: sam_cardinserted
+ *
+ * Description:
+ *   Check if a card is inserted into the selected HSMCI slot
+ *
+ ****************************************************************************/
+
+bool sam_cardinserted(int slotno)
+{
+  struct sam_hsmci_state_s *state;
+
+  /* Get the HSMI description */
+
+  state = sam_hsmci_state(slotno);
+  if (!state)
+    {
+      fdbg("No state for slotno %d\n", slotno);
+      return false;
+    }
+
+  /* Return the state of the PIO pin */
+
+  return sam_cardinserted_internal(state);
+}
+
+/****************************************************************************
+ * Name: sam_writeprotected
+ *
+ * Description:
+ *   Check if a card is inserted into the selected HSMCI slot
+ *
+ ****************************************************************************/
+
+bool sam_writeprotected(int slotno)
+{
+  /* There are no write protect pins */
+
+  return false;
+}
+
+#endif /* HAVE_HSMCI */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_i2schar.c b/nuttx/configs/sama5d3-xplained/src/sam_i2schar.c
new file mode 100644
index 000000000..8842c1046
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_i2schar.c
@@ -0,0 +1,124 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sam_i2schar.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/audio/i2s.h>
+
+#include "sam_ssc.h"
+#include "sama5d3-xplained.h"
+
+#if defined(CONFIG_AUDIO_I2SCHAR) && \
+   (defined(CONFIG_SAMA5_SSC0) || defined(CONFIG_SAMA5_SSC1))
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#ifndef CONFIG_SAMA5D3XPLAINED_SSC_PORT
+#  if defined(CONFIG_SAMA5_SSC0)
+#    define CONFIG_SAMA5D3XPLAINED_SSC_PORT 0
+#  elif defined(CONFIG_SAMA5_SSC1)
+#    define CONFIG_SAMA5D3XPLAINED_SSC_PORT 1
+#  endif
+#endif
+
+#ifndef CONFIG_SAMA5D3XPLAINED_I2SCHAR_MINOR
+#  define CONFIG_SAMA5D3XPLAINED_I2SCHAR_MINOR 0
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: i2schar_devinit
+ *
+ * Description:
+ *   All architectures must provide the following interface in order to work with
+ *   apps/examples/i2schar.
+ *
+ ************************************************************************************/
+
+int i2schar_devinit(void)
+{
+  static bool initialized = false;
+  struct i2s_dev_s *i2s;
+  int ret;
+
+  /* Have we already initialized? */
+
+  if (!initialized)
+    {
+      /* Call sam_ssc_initialize() to get an instance of the SSC/I2S interface */
+
+      i2s = sam_ssc_initialize(CONFIG_SAMA5D3XPLAINED_SSC_PORT);
+      if (!i2s)
+        {
+          dbg("ERROR: Failed to get the SAMA5 SSC/I2S driver for SSC%d\n",
+              CONFIG_SAMA5D3XPLAINED_SSC_PORT);
+          return -ENODEV;
+        }
+
+      /* Register the I2S character driver at "/dev/i2schar0" */
+
+      ret = i2schar_register(i2s, CONFIG_SAMA5D3XPLAINED_I2SCHAR_MINOR);
+      if (ret < 0)
+        {
+          adbg("ERROR: i2schar_register failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+#endif /* CONFIG_AUDIO_I2SCHAR && (CONFIG_SAMA5_SSC0 || CONFIG_SAMA5_SSC1) */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_nandflash.c b/nuttx/configs/sama5d3-xplained/src/sam_nandflash.c
new file mode 100644
index 000000000..19572b075
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_nandflash.c
@@ -0,0 +1,231 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/src/sam_norflash.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Most of this file derives from Atmel sample code for the SAMA5D3-Xplained
+ * board.  That sample code has licensing that is compatible with the NuttX
+ * modified BSD license:
+ *
+ *   Copyright (c) 2012, Atmel Corporation
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor Atmel nor the names of its contributors may
+ *    be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/mount.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/mtd/mtd.h>
+#include <nuttx/fs/nxffs.h>
+
+#include "up_arch.h"
+#include "sam_periphclks.h"
+#include "sam_pio.h"
+#include "sam_nand.h"
+#include "chip/sam_hsmc.h"
+#include "chip/sam_pinmap.h"
+
+#include "sama5d3-xplained.h"
+
+#ifdef CONFIG_SAMA5_EBICS3_NAND
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_nandflash_config
+ *
+ * Description:
+ *   If CONFIG_SAMA5_EBICS3_NAND is defined, then NAND FLASH support is
+ *   enabled.  This function provides the board-specific implementation of
+ *   the logic to reprogram the SMC to support NAND FLASH on the specified
+ *   CS.
+ *
+ * Input Parameters:
+ *   cs - Chip select number (in the event that multiple NAND devices
+ *        are connected on-board).
+ *
+ * Returned Values:
+ *   OK if the HSMC was successfully configured for this CS.  A negated
+ *   errno value is returned on a failure.  This would fail with -ENODEV,
+ *   for example, if the board does not support NAND FLASH on the requested
+ *   CS.
+ *
+ ****************************************************************************/
+
+int board_nandflash_config(int cs)
+{
+  uint32_t regval;
+
+  /* The Embest and Ronetix CM boards and one Hynix NAND HY27UF(08/16)2G2B
+   * Series NAND (MT29F2G08ABAEAWP).  This part has a capacity of 256Mx8bit
+   * () with spare 8Mx8 bit capacity. The device contains 2048 blocks, composed
+   * by 64 x 2112 byte pages.  The effective size is approximately 256MiB.
+   *
+   * NAND is available on CS3.
+   */
+
+  if (cs == HSMC_CS3)
+    {
+      /* Make sure that the SMC peripheral is enabled. */
+
+      sam_hsmc_enableclk();
+
+      /* Configure the SMC */
+
+      regval = HSMC_SETUP_NWE_SETUP(1) |  HSMC_SETUP_NCS_WRSETUP(1) |
+               HSMC_SETUP_NRD_SETUP(2) | HSMC_SETUP_NCS_RDSETUP(1);
+      putreg32(regval, SAM_HSMC_SETUP(HSMC_CS3));
+
+      regval = HSMC_PULSE_NWE_PULSE(5) | HSMC_PULSE_NCS_WRPULSE(7) |
+               HSMC_PULSE_NRD_PULSE(5) | HSMC_PULSE_NCS_RDPULSE(7);
+      putreg32(regval, SAM_HSMC_PULSE(HSMC_CS3));
+
+      regval = HSMC_CYCLE_NWE_CYCLE(8) | HSMC_CYCLE_NRD_CYCLE(9);
+      putreg32(regval, SAM_HSMC_CYCLE(HSMC_CS3));
+
+      regval = HSMC_TIMINGS_TCLR(3) | HSMC_TIMINGS_TADL(10) |
+               HSMC_TIMINGS_TAR(3) | HSMC_TIMINGS_TRR(4) |
+               HSMC_TIMINGS_TWB(5) | HSMC_TIMINGS_RBNSEL(3) |
+               HSMC_TIMINGS_NFSEL;
+      putreg32(regval, SAM_HSMC_TIMINGS(HSMC_CS3));
+
+      regval = HSMC_MODE_READMODE | HSMC_MODE_WRITEMODE |
+               HSMC_MODE_BIT_8 | HSMC_MODE_TDFCYCLES(1);
+      putreg32(regval, SAM_HSMC_MODE(HSMC_CS3));
+
+      /* Configure NAND PIO pins
+       *
+       * NAND Interface:
+       *
+       *   NCS3/NANDCE - Dedicated pin; no configuration needed
+       *   NANDCLE     - PE21
+       *   NANDALE     - PE22
+       *   NRD/NANDOE  - Dedicated pin; no configuration needed
+       *   NWE/NANDWE  - Dedicated pin; no configuration needed
+       *   NANDRDY     - Dedicated pin; no configuration needed
+       *   M_EBI_D0-7  - Dedicated pins; no configuration needed
+       */
+
+      sam_configpio(PIO_HSMC_NANDALE);
+      sam_configpio(PIO_HSMC_NANDCLE);
+
+      return OK;
+    }
+
+  return -ENODEV;
+}
+
+/****************************************************************************
+ * Name: sam_nand_automount
+ *
+ * Description:
+ *   Initialize and configure the NAND on CS3
+ *
+ ****************************************************************************/
+
+#ifdef HAVE_NAND
+int sam_nand_automount(int minor)
+{
+  FAR struct mtd_dev_s *mtd;
+  static bool initialized = false;
+  int ret;
+
+  /* Have we already initialized? */
+
+  if (!initialized)
+    {
+      /* Create and initialize an NAND MATD device */
+
+      mtd = sam_nand_initialize(HSMC_CS3);
+      if (!mtd)
+        {
+          fdbg("ERROR: Failed to create the NAND driver on CS%d\n", HSMC_CS3);
+          return -ENODEV;
+        }
+
+#if defined(CONFIG_SAMA5D3XPLAINED_NAND_FTL)
+      /* Use the FTL layer to wrap the MTD driver as a block driver */
+
+      ret = ftl_initialize(NAND_MINOR, mtd);
+      if (ret < 0)
+        {
+          fdbg("ERROR: Failed to initialize the FTL layer: %d\n", ret);
+          return ret;
+        }
+
+#elif defined(CONFIG_SAMA5D3XPLAINED_NAND_NXFFS)
+      /* Initialize to provide NXFFS on the MTD interface */
+
+      ret = nxffs_initialize(mtd);
+      if (ret < 0)
+        {
+          fdbg("ERROR: NXFFS initialization failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Mount the file system at /mnt/nand */
+
+      ret = mount(NULL, "/mnt/nand", "nxffs", 0, NULL);
+      if (ret < 0)
+        {
+          fdbg("ERROR: Failed to mount the NXFFS volume: %d\n", errno);
+          return ret;
+        }
+#endif
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+#endif
+
+#endif /* CONFIG_SAMA5_EBICS3_NAND */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_norflash.c b/nuttx/configs/sama5d3-xplained/src/sam_norflash.c
new file mode 100644
index 000000000..871461a5a
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_norflash.c
@@ -0,0 +1,145 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/src/sam_norflash.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Most of this file derives from Atmel sample code for the SAMA5D3-Xplained
+ * board.  That sample code has licensing that is compatible with the NuttX
+ * modified BSD license:
+ *
+ *   Copyright (c) 2012, Atmel Corporation
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor Atmel nor the names of its contributors may
+ *    be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include "up_arch.h"
+#include "sam_periphclks.h"
+#include "chip/sam_hsmc.h"
+
+#include "sama5d3-xplained.h"
+
+#ifdef CONFIG_SAMA5_BOOT_CS0FLASH
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_norflash_config
+ *
+ * Description:
+ *   If CONFIG_SAMA5_BOOT_CS0FLASH, then the system is boot directly off
+ *   CS0 NOR FLASH.  In this case, we assume that we get here from the
+ *   primary boot loader under these conditions:
+ *
+ *     "If BMS signal is tied to 0, BMS_BIT is read at 1.  The ROM Code
+ *      allows execution of the code contained into the memory connected to
+ *      Chip Select 0 of the External Bus Interface.
+ *
+ *     "To achieve that, the following sequence is preformed by the ROM
+ *      Code:
+ *
+ *        - The main clock is the on-chip 12 MHz RC oscillator,
+ *        - The Static Memory Controller is configured with timing allowing
+ *          code execution inCS0 external memory at 12 MHz
+ *        - AXI matrix is configured to remap EBI CS0 address at 0x0
+ *        - 0x0 is loaded in the Program Counter register
+ *
+ *     "The user software in the external memory must perform the next
+ *      operation in order to complete the clocks and SMC timings
+ *      configuration to run at a higher clock frequency:
+ *
+ *        - Enable the 32768 Hz oscillator if best accuracy is needed
+ *        - Reprogram the SMC setup, cycle, hold, mode timing registers
+ *          for EBI CS0, to adapt them to the new clock
+ *        - Program the PMC (Main Oscillator Enable or Bypass mode)
+ *        - Program and Start the PLL
+ *        - Switch the system clock to the new value"
+ *
+ *   This function provides the board-specific implementation of the logic
+ *   to reprogram the SMC.
+ *
+ ****************************************************************************/
+
+void board_norflash_config(void)
+{
+  uint32_t regval;
+
+  /* Make sure that the SMC peripheral is enabled (But of course it is... we
+   * are executing from NOR FLASH now).
+   */
+
+  sam_hsmc_enableclk();
+
+  /* The SAMA5D3-Xplained has 118MB of 16-bit NOR FLASH at CS0.  The NOR FLASH
+   * has already been configured by the first level ROM bootloader... we
+   * simply need to modify the timing here.
+   */
+
+  regval = HSMC_SETUP_NWE_SETUP(1) |  HSMC_SETUP_NCS_WRSETUP(0) |
+           HSMC_SETUP_NRD_SETUP(2) | HSMC_SETUP_NCS_RDSETUP(0);
+  putreg32(regval, SAM_HSMC_SETUP(HSMC_CS0));
+
+  regval = HSMC_PULSE_NWE_PULSE(10) | HSMC_PULSE_NCS_WRPULSE(10) |
+           HSMC_PULSE_NRD_PULSE(11) | HSMC_PULSE_NCS_RDPULSE(11);
+  putreg32(regval, SAM_HSMC_PULSE(HSMC_CS0));
+
+  regval = HSMC_CYCLE_NWE_CYCLE(11) | HSMC_CYCLE_NRD_CYCLE(14);
+  putreg32(regval, SAM_HSMC_CYCLE(HSMC_CS0));
+
+  regval = HSMC_TIMINGS_TCLR(0) | HSMC_TIMINGS_TADL(0) |
+           HSMC_TIMINGS_TAR(0) | HSMC_TIMINGS_TRR(0) |
+           HSMC_TIMINGS_TWB(0) | HSMC_TIMINGS_RBNSEL(0);
+  putreg32(regval, SAM_HSMC_TIMINGS(HSMC_CS0));
+
+  regval = HSMC_MODE_READMODE | HSMC_MODE_WRITEMODE |
+           HSMC_MODE_EXNWMODE_DISABLED | HSMC_MODE_BIT_16 |
+           HSMC_MODE_TDFCYCLES(1);
+  putreg32(regval, SAM_HSMC_MODE(HSMC_CS0));
+}
+
+#endif /* CONFIG_SAMA5_BOOT_CS0FLASH */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_nsh.c b/nuttx/configs/sama5d3-xplained/src/sam_nsh.c
new file mode 100644
index 000000000..20cb0ae85
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_nsh.c
@@ -0,0 +1,166 @@
+/****************************************************************************
+ * config/sama5d3-xplained/src/sam_nsh.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/mount.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <errno.h>
+#include <debug.h>
+
+#ifdef CONFIG_SYSTEM_USBMONITOR
+#  include <apps/usbmonitor.h>
+#endif
+
+#include "sama5d3-xplained.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* Debug ********************************************************************/
+
+#ifdef CONFIG_CPP_HAVE_VARARGS
+#  ifdef CONFIG_DEBUG
+#    define message(...) syslog(__VA_ARGS__)
+#  else
+#    define message(...) printf(__VA_ARGS__)
+#  endif
+#else
+#  ifdef CONFIG_DEBUG
+#    define message syslog
+#  else
+#    define message printf
+#  endif
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_archinitialize
+ *
+ * Description:
+ *   Perform architecture specific initialization
+ *
+ ****************************************************************************/
+
+int nsh_archinitialize(void)
+{
+#if defined(HAVE_NAND) || defined(HAVE_AT25) || defined(HAVE_HSMCI) || \
+    defined(HAVE_USBHOST) || defined(HAVE_USBMONITOR)
+  int ret;
+#endif
+
+#ifdef HAVE_NAND
+  /* Initialize the NAND driver */
+
+  ret = sam_nand_automount(NAND_MINOR);
+  if (ret < 0)
+    {
+      message("ERROR: sam_nand_automount failed: %d\n", ret);
+      return ret;
+    }
+#endif
+
+#ifdef HAVE_AT25
+  /* Initialize the AT25 driver */
+
+  ret = sam_at25_automount(AT25_MINOR);
+  if (ret < 0)
+    {
+      message("ERROR: sam_at25_automount failed: %d\n", ret);
+      return ret;
+    }
+#endif
+
+#ifdef HAVE_HSMCI
+#ifdef CONFIG_SAMA5_HSMCI0
+  /* Initialize the HSMCI0 driver */
+
+  ret = sam_hsmci_initialize(HSMCI0_SLOTNO, HSMCI0_MINOR);
+  if (ret < 0)
+    {
+      message("ERROR: sam_hsmci_initialize(%d,%d) failed: %d\n",
+              HSMCI0_SLOTNO, HSMCI0_MINOR, ret);
+      return ret;
+    }
+#endif
+
+#ifdef CONFIG_SAMA5_HSMCI1
+  /* Initialize the HSMCI1 driver */
+
+  ret = sam_hsmci_initialize(HSMCI1_SLOTNO, HSMCI1_MINOR);
+  if (ret < 0)
+    {
+      message("ERROR: sam_hsmci_initialize(%d,%d) failed: %d\n",
+              HSMCI1_SLOTNO, HSMCI1_MINOR, ret);
+      return ret;
+    }
+#endif
+#endif
+
+#ifdef HAVE_USBHOST
+  /* Initialize USB host operation.  sam_usbhost_initialize() starts a thread
+   * will monitor for USB connection and disconnection events.
+   */
+
+  ret = sam_usbhost_initialize();
+  if (ret != OK)
+    {
+      message("ERROR: Failed to initialize USB host: %d\n", ret);
+      return ret;
+    }
+#endif
+
+#ifdef HAVE_USBMONITOR
+  /* Start the USB Monitor */
+
+  ret = usbmonitor_start(0, NULL);
+  if (ret != OK)
+    {
+      message("nsh_archinitialize: Start USB monitor: %d\n", ret);
+    }
+#endif
+
+  return OK;
+}
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_ostest.c b/nuttx/configs/sama5d3-xplained/src/sam_ostest.c
new file mode 100644
index 000000000..c169d9da5
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_ostest.c
@@ -0,0 +1,113 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sam_ostest.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <debug.h>
+
+#include <arch/irq.h>
+#include <arch/board/board.h>
+
+#include "up_arch.h"
+#include "up_internal.h"
+#include "sama5d3-xplained.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+/* Configuration ********************************************************************/
+
+#undef HAVE_FPU
+#if defined(CONFIG_ARCH_FPU) && !defined(CONFIG_EXAMPLES_OSTEST_FPUTESTDISABLE) && \
+    defined(CONFIG_EXAMPLES_OSTEST_FPUSIZE) && defined(CONFIG_SCHED_WAITPID) && \
+    !defined(CONFIG_DISABLE_SIGNALS)
+#    define HAVE_FPU 1
+#endif
+
+#ifdef HAVE_FPU
+
+#if CONFIG_EXAMPLES_OSTEST_FPUSIZE != (4*FPU_CONTEXT_REGS)
+#  error "CONFIG_EXAMPLES_OSTEST_FPUSIZE has the wrong size"
+#endif
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+static uint32_t g_saveregs[XCPTCONTEXT_REGS];
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+/* Given an array of size CONFIG_EXAMPLES_OSTEST_FPUSIZE, this function will return
+ * the current FPU registers.
+ */
+
+void arch_getfpu(FAR uint32_t *fpusave)
+{
+  irqstate_t flags;
+
+  /* Take a snapshot of the thread context right now */
+
+  flags = irqsave();
+  up_saveusercontext(g_saveregs);
+
+  /* Return only the floating register values */
+
+  memcpy(fpusave, &g_saveregs[REG_S0], (4*FPU_CONTEXT_REGS));
+  irqrestore(flags);
+}
+
+/* Given two arrays of size CONFIG_EXAMPLES_OSTEST_FPUSIZE this function
+ * will compare them and return true if they are identical.
+ */
+
+bool arch_cmpfpu(FAR const uint32_t *fpusave1, FAR const uint32_t *fpusave2)
+{
+  return memcmp(fpusave1, fpusave2, (4*FPU_CONTEXT_REGS)) == 0;
+}
+
+#endif /* HAVE_FPU */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_pwm.c b/nuttx/configs/sama5d3-xplained/src/sam_pwm.c
new file mode 100644
index 000000000..5992bd0d5
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_pwm.c
@@ -0,0 +1,161 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sam_pwm.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/pwm.h>
+#include <arch/board/board.h>
+
+#include "sam_pwm.h"
+#include "sama5d3-xplained.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+/* Configuration ********************************************************************/
+/* PWM.  There are no dedicated PWM output pins available to the user for PWM
+ * testing.  Care must be taken because all PWM output pins conflict with some other
+ * usage of the pin by other devices:
+ *
+ *    -----+---+---+----+--------------------
+ *     PWM  PIN PER PIO  CONFLICTS
+ *    -----+---+---+----+--------------------
+ *     PWM0 FI   B  PC28   SPI1, ISI
+ *          H    B  PB0    GMAC
+ *               B  PA20   LCDC, ISI
+ *          L    B  PB1    GMAC
+ *               B  PA21   LCDC, ISI
+ *    -----+---+---+----+--------------------
+ *     PWM1 FI   B  PC31   HDMI
+ *          H    B  PB4    GMAC
+ *               B  PA22   LCDC, ISI
+ *          L    B  PB5    GMAC
+ *               B  PE31   ISI, HDMI
+ *               B  PA23   LCDC, ISI
+ *    -----+---+---+----+--------------------
+ *     PWM2 FI   B  PC29   UART0, ISI, HDMI
+ *          H    C  PD5    HSMCI0
+ *               B  PB8    GMAC
+ *          L    C  PD6    HSMCI0
+ *               B  PB9    GMAC
+ *    -----+---+---+----+--------------------
+ *     PWM3 FI   C  PD16   SPI0, Audio
+ *          H    C  PD7    HSMCI0
+ *               B  PB12   GMAC
+ *          L    C  PD8    HSMCI0
+ *               B  PB13   GMAC
+ *    -----+---+---+----+--------------------
+ */
+
+#ifndef CONFIG_SAMA5D3XPLAINED_CHANNEL
+#  if defined(CONFIG_SAMA5_PWM_CHAN0)
+#    warning Assuming PWM channel 0
+#    define CONFIG_SAMA5D3XPLAINED_CHANNEL 0
+#  elif defined(CONFIG_SAMA5_PWM_CHAN1)
+#    warning Assuming PWM channel 1
+#    define CONFIG_SAMA5D3XPLAINED_CHANNEL 1
+#  elif defined(CONFIG_SAMA5_PWM_CHAN2)
+#    warning Assuming PWM channel 2
+#    define CONFIG_SAMA5D3XPLAINED_CHANNEL 2
+#  elif defined(CONFIG_SAMA5_PWM_CHAN3)
+#    warning Assuming PWM channel 3
+#    define CONFIG_SAMA5D3XPLAINED_CHANNEL 3
+#  endif
+#endif
+
+#if defined(CONFIG_PWM) && defined(CONFIG_SAMA5_PWM)
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: pwm_devinit
+ *
+ * Description:
+ *   All SAMA5 architectures must provide the following interface to work with
+ *   examples/pwm.
+ *
+ ************************************************************************************/
+
+int pwm_devinit(void)
+{
+  static bool initialized = false;
+  struct pwm_lowerhalf_s *pwm;
+  int ret;
+
+  /* Have we already initialized? */
+
+  if (!initialized)
+    {
+      /* Call sam_pwminitialize() to get an instance of the PWM interface */
+
+      pwm = sam_pwminitialize(CONFIG_SAMA5D3XPLAINED_CHANNEL);
+      if (!pwm)
+        {
+          dbg("Failed to get the SAMA5 PWM lower half\n");
+          return -ENODEV;
+        }
+
+      /* Register the PWM driver at "/dev/pwm0" */
+
+      ret = pwm_register("/dev/pwm0", pwm);
+      if (ret < 0)
+        {
+          adbg("pwm_register failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+#endif /* CONFIG_PWM */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_sdram.c b/nuttx/configs/sama5d3-xplained/src/sam_sdram.c
new file mode 100644
index 000000000..9e0bee0c8
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_sdram.c
@@ -0,0 +1,578 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/src/sam_sdram.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Most of this file derives from Atmel sample code for the SAMA5D3x-E
+ * board.  That sample code has licensing that is compatible with the NuttX
+ * modified BSD license:
+ *
+ *   Copyright (c) 2012, Atmel Corporation
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor Atmel nor the names of its contributors may
+ *    be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include "up_arch.h"
+
+#include "sam_periphclks.h"
+#include "chip/sam_memorymap.h"
+#include "chip/sam_pmc.h"
+#include "chip/sam_sfr.h"
+#include "chip/sam_mpddrc.h"
+
+#include "sama5d3-xplained.h"
+
+/* This file requires:
+ *
+ * CONFIG_SAMA5_DDRCS -- DRAM support is enabled, and
+ * !CONFIG_SAMA5_BOOT_SDRAM - We did not boot into SRAM.
+ */
+
+#if defined(CONFIG_SAMA5_DDRCS) && !defined(CONFIG_SAMA5_BOOT_SDRAM)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* SDRAM differences */
+
+#if defined(CONFIG_SAMA5D3XPLAINED_MT47H128M16RT)
+
+  /* Used for SDRAM command handshaking */
+
+#  define DDR2_BA0    (1 << 26)
+#  define DDR2_BA1    (1 << 27)
+
+#elif defined(CONFIG_SAMA5D3XPLAINED_MT47H64M16HR)
+
+  /* Used for SDRAM command handshaking */
+
+#  define DDR2_BA0    (1 << 25)
+#  define DDR2_BA1    (1 << 26)
+
+#else
+#  error Unknown SDRAM type
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_sdram_delay
+ *
+ * Description:
+ *   Precision delay function for SDRAM configuration.
+ *
+ *   This delay loop requires 6 core cycles per iteration.  At 396MHz, that
+ *   is equivalent to 15.1515 nanoseconds per iteration.
+ *
+ ****************************************************************************/
+
+static inline void sam_sdram_delay(unsigned int loops)
+{
+  volatile unsigned int i;
+
+  for (i = 0; i < loops; i++)
+    {
+      asm("nop");
+    }
+}
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_sdram_config
+ *
+ * Description:
+ *   Configures DDR2 (MT47H128M16RT 128MB/ MT47H64M16HR)
+ *
+ *   Configures DDR2 (MT47H128M16RT 128MB or, optionally,  MT47H64M16HR)
+ *
+ *   Per the SAMA5D3-Xplained User guide: "Two SDRAM/DDR2 used as main system memory.
+ *   MT47H128M16 - 2 Gb - 16 Meg x 16 x 8 banks, the board provides up to 2 Gb on-
+ *   board, soldered DDR2 SDRAM. The memory bus is 32 bits wide and operates with
+ *   up to 166 MHz."
+ *
+ *   From the Atmel Code Example:
+ *     MT47H64M16HR : 8 Meg x 16 x 8 banks
+ *     Refresh count: 8K
+ *     Row address: A[12:0] (8K)
+ *     Column address A[9:0] (1K)
+ *     Bank address BA[2:0] a(24,25) (8)
+ *
+ *  This logic was taken from Atmel sample code for the SAMA5D3-Xplained.
+ *
+ *  Input Parameters:
+ *     devtype - Either DDRAM_MT47H128M16RT or DDRAM_MT47H64M16HR
+ *
+ *  Assumptions:
+ *    The DDR memory regions is configured as strongly ordered memory.  When
+ *    we complete initialization of SDRAM and it is ready for use, we will
+ *    make DRAM into normal memory.
+ *
+ ************************************************************************************/
+
+void sam_sdram_config(void)
+{
+  volatile uint8_t *ddr = (uint8_t *)SAM_DDRCS_VSECTION;
+  uint32_t regval;
+
+  /* Enable x2 clocking to the MPDDRC */
+
+  sam_mpddrc_enableclk();
+
+  /* Enable DDR clocking */
+
+  regval  = getreg32(SAM_PMC_SCER);
+  regval |= PMC_DDRCK;
+  putreg32(regval, SAM_PMC_SCER);
+
+  /* Clear the low power register */
+
+  putreg32(0, SAM_MPDDRC_LPR);
+
+  /* Enable autofresh during calibration (undocumented) */
+
+  regval  = getreg32(SAM_MPDDRC_HS);
+  regval |= MPDDRC_HS_AUTOREFRESH_CAL;
+  putreg32(regval, SAM_MPDDRC_HS);
+
+  /* Force DDR_DQ and DDR_DQS input buffer always on (undocumented) */
+
+  regval  = getreg32(SAM_SFR_DDRCFG);
+  regval |= SFR_DDRCFG_DRQON;
+  putreg32(regval, SAM_SFR_DDRCFG);
+
+  /* Configure the slave offset register */
+
+  regval = MPDDRC_DLL_SOR_S0OFF(1) |      /* DLL Slave 0 Delay Line Offset */
+           MPDDRC_DLL_SOR_S1OFF(0) |      /* DLL Slave 1 Delay Line Offset */
+           MPDDRC_DLL_SOR_S2OFF(1) |      /* DLL Slave 2 Delay Line Offset */
+           MPDDRC_DLL_SOR_S3OFF(1);       /* DLL Slave 3 Delay Line Offset */
+  putreg32(regval, SAM_MPDDRC_DLL_SOR);
+
+  /* Configure the master offset register (including upper mystery bits) */
+
+  regval = MPDDRC_DLL_MOR_MOFF(7) |       /* DLL Master Delay Line Offset */
+           MPDDRC_DLL_MOR_CLK90OFF(31) |  /* DLL CLK90 Delay Line Offset */
+           MPDDRC_DLL_MOR_SELOFF |        /* DLL Offset Selection */
+           MPDDRC_DLL_MOR_KEY;            /* Undocumented key */
+  putreg32(regval, SAM_MPDDRC_DLL_MOR);
+
+  /* Configure the I/O calibration register */
+
+  regval  =  getreg32(SAM_MPDDRC_IO_CALIBR);
+  regval &= ~(MPDDRC_IO_CALIBR_RDIV_MASK | MPDDRC_IO_CALIBR_TZQIO_MASK);
+  regval |= (MPDDRC_IO_CALIBR_RZQ48_40 |  MPDDRC_IO_CALIBR_TZQIO(3));
+  putreg32(regval, SAM_MPDDRC_IO_CALIBR);
+
+  /* Force DDR_DQ and DDR_DQS input buffer always on, clearing other bits
+   * (undocumented)
+   */
+
+  putreg32(SFR_DDRCFG_DRQON, SAM_SFR_DDRCFG);
+
+  /* Step 1: Program the memory device type
+   *
+   *   DBW = 0 (32-bit bus wide)
+   *   Memory Device = DDR2-SDRAM
+   */
+
+  putreg32(MPDDRC_MD_DDR2_SDRAM, SAM_MPDDRC_MD);
+
+  /* Step 2: Program the features of DDR2-SDRAM device into the Timing
+   * Register
+   */
+
+#if defined(CONFIG_SAMA5D3XPLAINED_MT47H128M16RT)
+
+  /* For MT47H128M16RT
+   *
+   *   NC      = 10 DDR column bits
+   *   NR      = 14 DDR row bits
+   *   CAS     = DDR2/LPDDR2 CAS Latency 4
+   *   DLL     = Disable reset (0)
+   *   DIC_DS  = 0
+   *   DIS_DLL = Enable PLL (0)
+   *   ZQ      = Calibration command after initialization (0)
+   *   OCD     = OCD calibration mode exit, maintain setting (0)
+   *   DQMS    = Not shared (0)
+   *   ENDRM   = Disable read measure (0)
+   *   NB      = 8 banks
+   *   NDQS    = Not DQS disabled
+   *   DECODE  = Sequential decoding (0)
+   *   UNAL    = Unaliged access supported
+   */
+
+  regval = MPDDRC_CR_NC_10 |    /* Number of Column Bits */
+           MPDDRC_CR_NR_14 |    /* Number of Row Bits */
+           MPDDRC_CR_CAS_4 |    /* CAS Latency */
+           MPDDRC_CR_OCD_EXIT | /* Off-chip Driver */
+           MPDDRC_CR_8BANKS |   /* Number of Banks */
+           MPDDRC_CR_NDQS |     /* Not DQS */
+           MPDDRC_CR_UNAL;      /* upport Unaligned Access */
+
+#elif defined(CONFIG_SAMA5D3XPLAINED_MT47H64M16HR)
+  /* For MT47H64M16HR
+   *
+   *   NC      = 10 DDR column bits
+   *   NR      = 13 DDR row bits
+   *   CAS     = DDR2/LPDDR2 CAS Latency 3
+   *   DLL     = Disable reset (0)
+   *   DIC_DS  = 0
+   *   DIS_DLL = Enable PLL (0)
+   *   ZQ      = Calibration command after initialization (0)
+   *   OCD     = OCD calibration mode exit, maintain setting (0)
+   *   DQMS    = Not shared (0)
+   *   ENDRM   = Disable read measure (0)
+   *   NB      = 8 banks
+   *   NDQS    = Not DQS disabled
+   *   DECODE  = Sequential decoding (0)
+   *   UNAL    = Unaliged access supported
+   */
+
+  regval = MPDDRC_CR_NC_10 |    /* Number of Column Bits */
+           MPDDRC_CR_NR_13 |    /* Number of Row Bits */
+           MPDDRC_CR_CAS_3 |    /* CAS Latency */
+           MPDDRC_CR_OCD_EXIT | /* Off-chip Driver */
+           MPDDRC_CR_8BANKS |   /* Number of Banks */
+           MPDDRC_CR_NDQS |     /* Not DQS */
+           MPDDRC_CR_UNAL;      /* upport Unaligned Access */
+
+#else
+#  error Unknwon SDRAM type
+#endif
+
+  putreg32(regval, SAM_MPDDRC_CR);
+
+  /* Configure the Timing Parameter 0 Register */
+
+  regval = MPDDRC_TPR0_TRAS(6) |    /*  Active to Precharge Delay:    6 * 7.5 = 45 ns */
+           MPDDRC_TPR0_TRCD(2) |    /*  Row to Column Delay:          2 * 7.5 = 15 ns */
+           MPDDRC_TPR0_TWR(2) |     /*  Write Recovery Delay:         3 * 7.5 = 22.5 ns */
+           MPDDRC_TPR0_TRC(8) |     /*  Row Cycle Delay:              8 * 7.5 = 60 ns */
+           MPDDRC_TPR0_TRP(2) |     /*  Row Precharge Delay:          2 * 7.5 = 15 ns */
+           MPDDRC_TPR0_TRRD(1) |    /*  Active BankA to Active BankB: 2 * 7.5 = 15 ns */
+           MPDDRC_TPR0_TWTR(2) |    /*  Internal Write to Read Delay: 2 clock cycle */
+           MPDDRC_TPR0_TMRD(2);     /*  Load Mode Register Command to
+                                     *  Activate or Refresh Command:  2 clock cycles */
+  putreg32(regval, SAM_MPDDRC_TPR0);
+
+  /* Configure the Timing Parameter 1 Register */
+
+  regval = MPDDRC_TPR1_TRFC(14) |   /* Row Cycle Delay:
+                                     *   18 * 7.5 = 135 ns (min 127.5 ns for 1Gb DDR) */
+           MPDDRC_TPR1_TXSNR(16) |  /* Exit Self Refresh Delay to Non Read Command:
+                                     *   20 * 7.5 > 142.5ns TXSNR: Exit self refresh
+                                     *   delay to non read command */
+           MPDDRC_TPR1_TXSRD(208) | /* Exit Self Refresh Delay to Read Command:
+                                     *   min 200 clock cycles, TXSRD: Exit self refresh
+                                     *   delay to Read command */
+           MPDDRC_TPR1_TXP(2);      /* Exit Power-down Delay to First Command:
+                                     *   2 * 7.5 = 15 ns */
+  putreg32(regval, SAM_MPDDRC_TPR1);
+
+  /* Configure the Timing Parameter 2 Register */
+
+  regval = MPDDRC_TPR2_TXARD(7) |   /* Exit Active Power Down Delay to Read Command in Mode 'Fast Exit':
+                                     *   min 2 clock cycles */
+           MPDDRC_TPR2_TXARDS(7) |  /* Exit Active Power Down Delay to Read Command in Mode 'Slow Exit':
+                                     *   min 7 clock cycles */
+           MPDDRC_TPR2_TRPA(2) |    /* Row Precharge All Delay:
+                                     *   min 18ns */
+           MPDDRC_TPR2_TRTP(2) |    /* Four Active Windows:
+                                     *   2 * 7.5 = 15 ns (min 7.5ns) */
+           MPDDRC_TPR2_TFAW(10);
+  putreg32(regval, SAM_MPDDRC_TPR2);
+
+  /* DDRSDRC Low-power Register */
+
+  sam_sdram_delay(13300);
+
+  regval = MPDDRC_LPR_LPCB_DISABLED |  /* Low-power Feature is inhibited */
+           MPDDRC_LPR_TIMEOUT_0CLKS |  /* Activates low-power mode after the end of transfer */
+           MPDDRC_LPR_APDE_FAST;       /* Active Power Down Exit Time */
+  putreg32(regval, SAM_MPDDRC_LPR);
+
+  /* Step 3: An NOP command is issued to the DDR2-SDRAM. Program the NOP
+   * command into the Mode Register, the application must set MODE to 1 in
+   * the Mode Register.
+   */
+
+  putreg32(MPDDRC_MR_MODE_NOP, SAM_MPDDRC_MR);
+
+  /* Perform a write access to any DDR2-SDRAM address to acknowledge this
+   * command.
+   */
+
+  *ddr = 0;
+
+  /* Now clocks which drive DDR2-SDRAM device are enabled.
+   *
+   * A minimum pause of 200 usec is provided to precede any signal toggle.
+   * (6 core cycles per iteration, core is at 396MHz: min 13200 loops)
+   */
+
+  sam_sdram_delay(13300);
+
+  /* Step 4:  An NOP command is issued to the DDR2-SDRAM */
+
+  putreg32(MPDDRC_MR_MODE_NOP, SAM_MPDDRC_MR);
+
+  /* Perform a write access to any DDR2-SDRAM address to acknowledge this command.*/
+
+  *ddr = 0;
+
+  /* Now CKE is driven high.*/
+  /* Wait 400 ns min */
+
+  sam_sdram_delay(100);
+
+  /* Step 5: An all banks precharge command is issued to the DDR2-SDRAM. */
+
+  putreg32(MPDDRC_MR_MODE_PRCGALL, SAM_MPDDRC_MR);
+
+  /* Perform a write access to any DDR2-SDRAM address to acknowledge this command.*/
+
+  *ddr = 0;
+
+  /* Wait 400 ns min */
+
+  sam_sdram_delay(100);
+
+  /* Step 6: An Extended Mode Register set (EMRS2) cycle is  issued to chose
+   * between commercialor high  temperature operations.
+   *
+   * The write address must be chosen so that BA[1] is set to 1 and BA[0] is
+   * set to 0.
+   */
+
+  putreg32(MPDDRC_MR_MODE_EXTLMR, SAM_MPDDRC_MR);
+  *((volatile uint8_t *)(ddr + DDR2_BA1)) = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 7: An Extended Mode Register set (EMRS3) cycle is issued to set
+   * all registers to 0.
+   *
+   * The write address must be chosen so that BA[1] is set to 1 and BA[0] is
+   * set to 1.
+   */
+
+  putreg32(MPDDRC_MR_MODE_LMR, SAM_MPDDRC_MR);
+  *((volatile uint8_t *)(ddr + DDR2_BA1 + DDR2_BA0)) = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 8:  An Extended Mode Register set (EMRS1) cycle is issued to enable DLL.
+   *
+   * The write address must be chosen so that BA[1] is set to 0 and BA[0] is set to 1.
+   */
+
+  putreg32(MPDDRC_MR_MODE_EXTLMR, SAM_MPDDRC_MR);
+  *((volatile uint8_t *)(ddr + DDR2_BA0)) = 0;
+
+  /* An additional 200 cycles of clock are required for locking DLL */
+
+  sam_sdram_delay(10000);
+
+  /* Step 9:  Program DLL field into the Configuration Register.*/
+
+  regval  = getreg32(SAM_MPDDRC_CR);
+  regval |= MPDDRC_CR_DLL;
+  putreg32(regval, SAM_MPDDRC_CR);
+
+  /* Step 10: A Mode Register set (MRS) cycle is issued to reset DLL.
+   *
+   * The write address must be chosen so that BA[1:0] bits are set to 0.
+   */
+
+  putreg32(MPDDRC_MR_MODE_LMR, SAM_MPDDRC_MR);
+  *ddr = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 11: An all banks precharge command is issued to the DDR2-SDRAM.
+   *
+   * Perform a write access to any DDR2-SDRAM address to acknowledge this
+   * command
+   */
+
+  putreg32(MPDDRC_MR_MODE_PRCGALL, SAM_MPDDRC_MR);
+  *ddr = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 12: Two auto-refresh (CBR) cycles are provided. Program the auto
+   * refresh command (CBR) into the Mode Register.
+   *
+   * Perform a write access to any DDR2-SDRAM address to acknowledge this
+   * command.
+   */
+
+  putreg32(MPDDRC_MR_MODE_RFSH, SAM_MPDDRC_MR);
+  *ddr = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Configure 2nd CBR.
+   *
+   * Perform a write access to any DDR2-SDRAM address to acknowledge this command.
+   */
+
+  putreg32(MPDDRC_MR_MODE_RFSH, SAM_MPDDRC_MR);
+  *ddr = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 13: Program DLL field into the Configuration Register to low
+   * (Disable DLL reset).
+   */
+
+  regval  = getreg32(SAM_MPDDRC_CR);
+  regval &= ~MPDDRC_CR_DLL;
+  putreg32(regval, SAM_MPDDRC_CR);
+
+  /* Step 14: A Mode Register set (MRS) cycle is issued to program the
+   * parameters of the DDR2-SDRAM devices.
+   *
+   * The write address must be chosen so that BA[1:0] are set to 0.
+   */
+
+  putreg32(MPDDRC_MR_MODE_LMR, SAM_MPDDRC_MR);
+  *ddr = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 15: Program OCD field into the Configuration Register to high (OCD
+   * calibration default).
+   */
+
+  regval  = getreg32(SAM_MPDDRC_CR);
+  regval |= MPDDRC_CR_OCD_DEFAULT;
+  putreg32(regval, SAM_MPDDRC_CR);
+
+  /* Step 16: An Extended Mode Register set (EMRS1) cycle is issued to OCD
+   * default value.
+   *
+   * The write address must be chosen so that BA[1] is set to 0 and BA[0] is
+   * set to 1.
+   */
+
+  putreg32(MPDDRC_MR_MODE_EXTLMR, SAM_MPDDRC_MR);
+  *((volatile uint8_t *)(ddr + DDR2_BA0)) = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 17: Program OCD field into the Configuration Register to low (OCD
+   * calibration mode exit).
+   */
+
+#if 0
+  regval  = getreg32(SAM_MPDDRC_CR);
+  regval &= ~MPDDRC_CR_OCD_MASK;
+  putreg32(regval, SAM_MPDDRC_CR);
+#endif
+
+  /* Step 18: An Extended Mode Register set (EMRS1) cycle is issued to
+   * enable OCD exit.
+   *
+   * The write address must be chosen so that BA[1] is set to 0 and BA[0] is
+   * set to 1.
+   */
+
+  putreg32(MPDDRC_MR_MODE_EXTLMR, SAM_MPDDRC_MR);
+  *((volatile uint8_t *)(ddr + DDR2_BA0)) = 0;
+
+  /* Wait 2 cycles min */
+
+  sam_sdram_delay(100);
+
+  /* Step 19,20: A mode Normal command is provided. Program the Normal mode
+   * into Mode Register.
+   */
+
+  putreg32(MPDDRC_MR_MODE_NORMAL, SAM_MPDDRC_MR);
+  *ddr = 0;
+
+  /* Step 21: Write the refresh rate into the count field in the Refresh
+   * Timer register. The DDR2-SDRAM device requires a refresh every 15.625
+   * usec or 7.81 usec.
+   *
+   * With a 100MHz frequency, the refresh timer count register must to be
+   * set with (15.625 /100 MHz) = 1562 i.e. 0x061A or (7.81 /100MHz) = 781
+   * i.e. 0x030d.
+   */
+
+  /* For MT47H64M16HR, The refresh period is 64ms (commercial), This equates
+   * to an average refresh rate of 7.8125usec (commercial), To ensure all
+   * rows of all banks are properly refreshed, 8192 REFRESH commands must be
+   * issued every 64ms (commercial)
+   */
+
+  /* ((64 x 10(^-3))/8192) x133 x (10^6) */
+  /* Set Refresh timer 7.8125 us */
+
+  putreg32( MPDDRC_RTR_COUNT(300), SAM_MPDDRC_RTR);
+
+  /* OK now we are ready to work on the DDRSDR */
+  /* Wait for end of calibration */
+
+  sam_sdram_delay(500);
+}
+
+#endif /* CONFIG_SAMA5_DDRCS && !CONFIG_SAMA5_BOOT_SDRAM */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_spi.c b/nuttx/configs/sama5d3-xplained/src/sam_spi.c
new file mode 100644
index 000000000..025d6ce4d
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_spi.c
@@ -0,0 +1,216 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/up_spi.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/spi/spi.h>
+#include <arch/board/board.h>
+
+#include "up_arch.h"
+#include "chip.h"
+#include "sam_pio.h"
+#include "sam_spi.h"
+#include "sama5d3-xplained.h"
+
+#if defined(CONFIG_SAMA5_SPI0) || defined(CONFIG_SAMA5_SPI1)
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/* Enables debug output from this file (needs CONFIG_DEBUG too) */
+
+#undef SPI_DEBUG   /* Define to enable debug */
+#undef SPI_VERBOSE /* Define to enable verbose debug */
+
+#ifdef SPI_DEBUG
+#  define spidbg  lldbg
+#  ifdef SPI_VERBOSE
+#    define spivdbg lldbg
+#  else
+#    define spivdbg(x...)
+#  endif
+#else
+#  undef SPI_VERBOSE
+#  define spidbg(x...)
+#  define spivdbg(x...)
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_spiinitialize
+ *
+ * Description:
+ *   Called to configure SPI chip select PIO pins for the SAMA5D3-Xplained board.
+ *
+ ************************************************************************************/
+
+void weak_function sam_spiinitialize(void)
+{
+#ifdef CONFIG_SAMA5_SPI0
+#ifdef CONFIG_MTD_AT25
+  /* The AT25 serial FLASH connects using NPCS0 */
+
+   sam_configpio(PIO_AT25_NPCS0);
+#endif
+#endif
+
+#ifdef CONFIG_SAMA5_SPI1
+#endif
+}
+
+/****************************************************************************
+ * Name:  sam_spi[0|1]select, sam_spi[0|1]status, and sam_spi[0|1]cmddata
+ *
+ * Description:
+ *   These external functions must be provided by board-specific logic.  They
+ *   include:
+ *
+ *   o sam_spi[0|1]select is a functions tomanage the board-specific chip selects
+ *   o sam_spi[0|1]status and sam_spi[0|1]cmddata:  Implementations of the status
+ *     and cmddata methods of the SPI interface defined by struct spi_ops_
+ *     (see include/nuttx/spi/spi.h). All other methods including
+ *     up_spiinitialize()) are provided by common SAM3/4 logic.
+ *
+ *  To use this common SPI logic on your board:
+ *
+ *   1. Provide logic in sam_boardinitialize() to configure SPI chip select
+ *      pins.
+ *   2. Provide sam_spi[0|1]select() and sam_spi[0|1]status() functions in your board-
+ *      specific logic.  These functions will perform chip selection and
+ *      status operations using PIOs in the way your board is configured.
+ *   2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
+ *      sam_spi[0|1]cmddata() functions in your board-specific logic.  This
+ *      function will perform cmd/data selection operations using PIOs in
+ *      the way your board is configured.
+ *   3. Add a call to up_spiinitialize() in your low level application
+ *      initialization logic
+ *   4. The handle returned by up_spiinitialize() may then be used to bind the
+ *      SPI driver to higher level logic (e.g., calling
+ *      mmcsd_spislotinitialize(), for example, will bind the SPI driver to
+ *      the SPI MMC/SD driver).
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_spi[0|1]select
+ *
+ * Description:
+ *   PIO chip select pins may be programmed by the board specific logic in
+ *   one of two different ways.  First, the pins may be programmed as SPI
+ *   peripherals.  In that case, the pins are completely controlled by the
+ *   SPI driver.  This method still needs to be provided, but it may be only
+ *   a stub.
+ *
+ *   An alternative way to program the PIO chip select pins is as a normal
+ *   PIO output.  In that case, the automatic control of the CS pins is
+ *   bypassed and this function must provide control of the chip select.
+ *   NOTE:  In this case, the PIO output pin does *not* have to be the
+ *   same as the NPCS pin normal associated with the chip select number.
+ *
+ * Input Parameters:
+ *   devid - Identifies the (logical) device
+ *   selected - TRUE:Select the device, FALSE:De-select the device
+ *
+ * Returned Values:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SAMA5_SPI0
+void sam_spi0select(enum spi_dev_e devid, bool selected)
+{
+#ifdef CONFIG_MTD_AT25
+  /* The AT25 serial FLASH connects using NPCS0 */
+
+  if (devid == SPIDEV_FLASH)
+    {
+      sam_piowrite(PIO_AT25_NPCS0, !selected);
+    }
+#endif
+}
+#endif
+
+#ifdef CONFIG_SAMA5_SPI1
+void sam_spi1select(enum spi_dev_e devid, bool selected)
+{
+}
+#endif
+
+/****************************************************************************
+ * Name: sam_spi[0|1]status
+ *
+ * Description:
+ *   Return status information associated with the SPI device.
+ *
+ * Input Parameters:
+ *   devid - Identifies the (logical) device
+ *
+ * Returned Values:
+ *   Bit-encoded SPI status (see include/nuttx/spi/spi.h.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SAMA5_SPI0
+uint8_t sam_spi0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+  return 0;
+}
+#endif
+
+#ifdef CONFIG_SAMA5_SPI0
+uint8_t sam_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+  return 0;
+}
+#endif
+
+#endif /* CONFIG_SAMA5_SPI0 || CONFIG_SAMA5_SPI1 */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_usb.c b/nuttx/configs/sama5d3-xplained/src/sam_usb.c
new file mode 100644
index 000000000..089032431
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_usb.c
@@ -0,0 +1,530 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sam_usb.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <sched.h>
+#include <errno.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <nuttx/usb/usbdev.h>
+#include <nuttx/usb/usbhost.h>
+#include <nuttx/usb/usbdev_trace.h>
+
+#include "up_arch.h"
+#include "sam_pio.h"
+#include "sam_usbhost.h"
+#include "chip/sam_ohci.h"
+#include "sama5d3-xplained.h"
+
+#if defined(CONFIG_SAMA5_UHPHS) || defined(CONFIG_SAMA5_UDPHS)
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+#ifndef CONFIG_USBHOST_DEFPRIO
+#  define CONFIG_USBHOST_DEFPRIO 50
+#endif
+
+#ifndef CONFIG_USBHOST_STACKSIZE
+#  define CONFIG_USBHOST_STACKSIZE 1024
+#endif
+
+#ifdef HAVE_USBDEV
+#  undef CONFIG_SAMA5_UHPHS_RHPORT1
+#endif
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+/* Retained device driver handles */
+
+#ifdef CONFIG_SAMA5_OHCI
+static struct usbhost_connection_s *g_ohciconn;
+#endif
+#ifdef CONFIG_SAMA5_EHCI
+static struct usbhost_connection_s *g_ehciconn;
+#endif
+
+/* Overcurrent interrupt handler */
+
+#if defined(HAVE_USBHOST) && defined(CONFIG_SAMA5_PIOD_IRQ)
+static xcpt_t g_ochandler;
+#endif
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: usbhost_waiter
+ *
+ * Description:
+ *   Wait for USB devices to be connected to either the OHCI or EHCI hub.
+ *
+ ************************************************************************************/
+
+#if HAVE_USBHOST
+#ifdef CONFIG_DEBUG_USB
+static int usbhost_waiter(struct usbhost_connection_s *dev, const char *hcistr)
+#else
+static int usbhost_waiter(struct usbhost_connection_s *dev)
+#endif
+{
+  bool connected[SAM_OHCI_NRHPORT] = {false, false, false};
+  int rhpndx;
+  int ret;
+
+  uvdbg("%s Waiter Running\n", hcistr);
+  for (;;)
+    {
+      /* Wait for the device to change state */
+
+      rhpndx = CONN_WAIT(dev, connected);
+      DEBUGASSERT(rhpndx >= 0 && rhpndx < SAM_OHCI_NRHPORT);
+
+      connected[rhpndx] = !connected[rhpndx];
+
+      uvdbg("%s RHport%d %s\n",
+            hcistr, rhpndx + 1, connected[rhpndx] ? "connected" : "disconnected");
+
+      /* Did we just become connected? */
+
+      if (connected[rhpndx])
+        {
+          /* Yes.. enumerate the newly connected device */
+
+          ret = CONN_ENUMERATE(dev, rhpndx);
+          if (ret < 0)
+            {
+              uvdbg("%s RHport%d CONN_ENUMERATE failed: %d\n", hcistr, rhpndx+1, ret);
+              connected[rhpndx] = false;
+            }
+        }
+    }
+
+  /* Keep the compiler from complaining */
+
+  return 0;
+}
+#endif
+
+/************************************************************************************
+ * Name: ohci_waiter
+ *
+ * Description:
+ *   Wait for USB devices to be connected to the OHCI hub.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_SAMA5_OHCI
+static int ohci_waiter(int argc, char *argv[])
+{
+#ifdef CONFIG_DEBUG_USB
+  return usbhost_waiter(g_ohciconn, "OHCI");
+#else
+  return usbhost_waiter(g_ohciconn);
+#endif
+}
+#endif
+
+/************************************************************************************
+ * Name: ehci_waiter
+ *
+ * Description:
+ *   Wait for USB devices to be connected to the EHCI hub.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_SAMA5_EHCI
+static int ehci_waiter(int argc, char *argv[])
+{
+#ifdef CONFIG_DEBUG_USB
+  return usbhost_waiter(g_ehciconn, "EHCI");
+#else
+  return usbhost_waiter(g_ehciconn);
+#endif
+}
+#endif
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_usbinitialize
+ *
+ * Description:
+ *   Called from sam_usbinitialize very early in inialization to setup USB-related
+ *   GPIO pins for the SAMA5D3-Xplained board.
+ *
+ * USB Ports
+ *   The SAMA5D3 series-MB features three USB communication ports:
+ *
+ *     1. Port A Host High Speed (EHCI) and Full Speed (OHCI) multiplexed with
+ *        USB Device High Speed Micro AB connector, J20
+ *
+ *     2. Port B Host High Speed (EHCI) and Full Speed (OHCI) standard type A
+ *        connector, J19 upper port
+ *
+ *     3. Port C Host Full Speed (OHCI) only standard type A connector, J19
+ *        lower port
+ *
+ *   The two USB host ports (only) are equipped with 500-mA high-side power
+ *   switch for self-powered and bus-powered applications.
+ *
+ *   The USB device port A (J6) features a VBUS insert detection function.
+ *
+ *   Port A
+ *
+ *     PIO  Signal Name Function
+ *     ---- ----------- -------------------------------------------------------
+ *     PE9  VBUS_SENSE VBus detection
+ *
+ *     Note: No VBus power switch enable on port A.  I think that this limits
+ *     this port to a device port or as a host port for self-powered devices
+ *     only.
+ *
+ *   Port B
+ *
+ *     PIO  Signal Name Function
+ *     ---- ----------- -------------------------------------------------------
+ *     PE4  EN5V_USBB   VBus power enable (via MN3 power switch).  To the A1
+ *                      pin of J19 Dual USB A connector
+ *
+ *   Port C
+ *
+ *     PIO  Signal Name Function
+ *     ---- ----------- -------------------------------------------------------
+ *     PE3  EN5V_USBC   VBus power enable (via MN3 power switch).  To the B1
+ *                      pin of J19 Dual USB A connector
+ *
+ *    Both Ports B and C
+ *
+ *     PIO  Signal Name Function
+ *     ---- ----------- -------------------------------------------------------
+ *     PE5  OVCUR_USB   Combined over-current indication from port A and B
+ *
+ * That offers a lot of flexibility.  However, here we enable the ports only
+ * as follows:
+ *
+ *   Port A -- USB device
+ *   Port B -- EHCI host
+ *   Port C -- OHCI host
+ *
+ ************************************************************************************/
+
+void weak_function sam_usbinitialize(void)
+{
+#ifdef HAVE_USBDEV
+  /* Configure Port A to support the USB device function */
+
+  sam_configpio(PIO_USBA_VBUS_SENSE); /* VBUS sense */
+
+  /* TODO:  Configure an interrupt on VBUS sense */
+#endif
+
+#ifdef HAVE_USBHOST
+#ifdef CONFIG_SAMA5_UHPHS_RHPORT1
+  /* Configure Port A to support the USB OHCI/EHCI function */
+
+  sam_configpio(PIO_USBA_VBUS_ENABLE); /* VBUS enable, initially OFF */
+#endif
+
+#ifdef CONFIG_SAMA5_UHPHS_RHPORT2
+  /* Configure Port B to support the USB OHCI/EHCI function */
+
+  sam_configpio(PIO_USBB_VBUS_ENABLE); /* VBUS enable, initially OFF */
+#endif
+
+#ifdef CONFIG_SAMA5_UHPHS_RHPORT3
+  /* Configure Port C to support the USB OHCI/EHCI function */
+
+  sam_configpio(PIO_USBC_VBUS_ENABLE); /* VBUS enable, initially OFF */
+#endif
+
+#if defined(CONFIG_SAMA5_UHPHS_RHPORT2) || defined(CONFIG_SAMA5_UHPHS_RHPORT3)
+  /* Configure Port B/C VBUS overrcurrent detection */
+
+  sam_configpio(PIO_USBBC_VBUS_OVERCURRENT); /* VBUS overcurrent */
+#endif
+#endif /* HAVE_USBHOST */
+}
+
+/***********************************************************************************
+ * Name: sam_usbhost_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the USB host functionality.
+ *   This function will start a thread that will monitor for device
+ *   connection/disconnection events.
+ *
+ ***********************************************************************************/
+
+#if HAVE_USBHOST
+int sam_usbhost_initialize(void)
+{
+  pid_t pid;
+  int ret;
+
+  /* First, register all of the class drivers needed to support the drivers
+   * that we care about
+   *
+   * Register theUSB host Mass Storage Class:
+   */
+
+  ret = usbhost_storageinit();
+  if (ret != OK)
+    {
+      udbg("ERROR: Failed to register the mass storage class: %d\n", ret);
+    }
+
+  /* Register the USB host HID keyboard class driver */
+
+  ret = usbhost_kbdinit();
+  if (ret != OK)
+    {
+      udbg("ERROR: Failed to register the KBD class\n");
+    }
+
+  /* Then get an instance of the USB host interface. */
+
+#ifdef CONFIG_SAMA5_OHCI
+  /* Get an instance of the USB OHCI interface */
+
+  g_ohciconn = sam_ohci_initialize(0);
+  if (!g_ohciconn)
+    {
+      udbg("ERROR: sam_ohci_initialize failed\n");
+      return -ENODEV;
+    }
+
+  /* Start a thread to handle device connection. */
+
+  pid = TASK_CREATE("OHCI Monitor", CONFIG_USBHOST_DEFPRIO,  CONFIG_USBHOST_STACKSIZE,
+                    (main_t)ohci_waiter, (FAR char * const *)NULL);
+  if (pid < 0)
+    {
+      udbg("ERROR: Failed to create ohci_waiter task: %d\n", ret);
+      return -ENODEV;
+    }
+#endif
+
+#ifdef CONFIG_SAMA5_EHCI
+  /* Get an instance of the USB EHCI interface */
+
+  g_ehciconn = sam_ehci_initialize(0);
+  if (!g_ehciconn)
+    {
+      udbg("ERROR: sam_ehci_initialize failed\n");
+      return -ENODEV;
+    }
+
+  /* Start a thread to handle device connection. */
+
+  pid = TASK_CREATE("EHCI Monitor", CONFIG_USBHOST_DEFPRIO,  CONFIG_USBHOST_STACKSIZE,
+                    (main_t)ehci_waiter, (FAR char * const *)NULL);
+  if (pid < 0)
+    {
+      udbg("ERROR: Failed to create ehci_waiter task: %d\n", ret);
+      return -ENODEV;
+    }
+#endif
+
+  return OK;
+}
+#endif
+
+/***********************************************************************************
+ * Name: sam_usbhost_vbusdrive
+ *
+ * Description:
+ *   Enable/disable driving of VBUS 5V output.  This function must be provided by
+ *   each platform that implements the OHCI or EHCI host interface
+ *
+ * Input Parameters:
+ *   rhport - Selects root hub port to be powered host interface.  See SAM_RHPORT_*
+ *            definitions above.
+ *   enable - true: enable VBUS power; false: disable VBUS power
+ *
+ * Returned Value:
+ *   None
+ *
+ ***********************************************************************************/
+
+#if HAVE_USBHOST
+void sam_usbhost_vbusdrive(int rhport, bool enable)
+{
+  pio_pinset_t pinset = 0;
+
+  uvdbg("RHPort%d: enable=%d\n", rhport+1, enable);
+
+  /* Pick the PIO configuration associated with the selected root hub port */
+
+  switch (rhport)
+    {
+    case SAM_RHPORT1:
+#ifndef CONFIG_SAMA5_UHPHS_RHPORT1
+      udbg("ERROR: RHPort1 is not available in this configuration\n");
+      return;
+#else
+      pinset = PIO_USBA_VBUS_ENABLE;
+      break;
+#endif
+
+    case SAM_RHPORT2:
+#ifndef CONFIG_SAMA5_UHPHS_RHPORT2
+      udbg("ERROR: RHPort2 is not available in this configuration\n");
+      return;
+#else
+      pinset = PIO_USBB_VBUS_ENABLE;
+      break;
+#endif
+
+    case SAM_RHPORT3:
+#ifndef CONFIG_SAMA5_UHPHS_RHPORT3
+      udbg("ERROR: RHPort3 is not available in this configuration\n");
+      return;
+#else
+      pinset = PIO_USBC_VBUS_ENABLE;
+      break;
+#endif
+
+    default:
+      udbg("ERROR: RHPort%d is not supported\n", rhport+1);
+      return;
+    }
+
+  /* Then enable or disable VBUS power */
+
+  if (enable)
+    {
+      /* Enable the Power Switch by driving the enable pin low */
+
+      sam_piowrite(pinset, false);
+    }
+  else
+    {
+      /* Disable the Power Switch by driving the enable pin high */
+
+      sam_piowrite(pinset, true);
+    }
+}
+#endif
+
+/************************************************************************************
+ * Name: sam_setup_overcurrent
+ *
+ * Description:
+ *   Setup to receive an interrupt-level callback if an overcurrent condition is
+ *   detected on port B or C.
+ *
+ *   REVISIT: Since this is a common signal, we will need to come up with some way
+ *   to inform both EHCI and OHCI drivers when this error occurs.
+ *
+ * Input paramter:
+ *   handler - New overcurrent interrupt handler
+ *
+ * Returned value:
+ *   Old overcurrent interrupt handler
+ *
+ ************************************************************************************/
+
+#if HAVE_USBHOST
+xcpt_t sam_setup_overcurrent(xcpt_t handler)
+{
+#if defined(CONFIG_SAMA5_PIOD_IRQ) && (defined(CONFIG_SAMA5_UHPHS_RHPORT2) || \
+    defined(CONFIG_SAMA5_UHPHS_RHPORT3))
+
+  xcpt_t oldhandler;
+  irqstate_t flags;
+
+  /* Disable interrupts until we are done.  This guarantees that the
+   * following operations are atomic.
+   */
+
+  flags = irqsave();
+
+  /* Get the old button interrupt handler and save the new one */
+
+  oldhandler  = g_ochandler;
+  g_ochandler = handler;
+
+  /* Configure the interrupt */
+
+  sam_pioirq(IRQ_USBBC_VBUS_OVERCURRENT);
+  (void)irq_attach(IRQ_USBBC_VBUS_OVERCURRENT, handler);
+  sam_pioirqenable(IRQ_USBBC_VBUS_OVERCURRENT);
+
+  /* Return the old button handler (so that it can be restored) */
+
+  irqrestore(flags);
+  return oldhandler;
+
+#else
+  return NULL;
+
+#endif
+}
+#endif /* CONFIG_SAMA5_PIOD_IRQ ... */
+
+/************************************************************************************
+ * Name:  sam_usbsuspend
+ *
+ * Description:
+ *   Board logic must provide the sam_usbsuspend logic if the USBDEV driver is
+ *   used.  This function is called whenever the USB enters or leaves suspend mode.
+ *   This is an opportunity for the board logic to shutdown clocks, power, etc.
+ *   while the USB is suspended.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_USBDEV
+void sam_usbsuspend(FAR struct usbdev_s *dev, bool resume)
+{
+  ulldbg("resume: %d\n", resume);
+}
+#endif
+
+#endif /* CONFIG_SAMA5_UHPHS || CONFIG_SAMA5_UDPHS */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_usbmsc.c b/nuttx/configs/sama5d3-xplained/src/sam_usbmsc.c
new file mode 100644
index 000000000..79c4d6c42
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_usbmsc.c
@@ -0,0 +1,125 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/src/up_usbmsc.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Configure and register the SAM3U MMC/SD SDIO block driver.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <debug.h>
+#include <errno.h>
+
+#include "sama5d3-xplained.h"
+
+#ifdef CONFIG_USBMSC
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* Configuration ************************************************************/
+
+#ifndef HAVE_AT25
+#  error AT25 Serial FLASH not supported
+#endif
+
+#ifndef CONFIG_SAMA5D3XPLAINED_AT25_FTL
+#  error AT25 FTL support required (CONFIG_SAMA5D3XPLAINED_AT25_FTL)
+#  undef HAVE_AT25
+#endif
+
+#ifndef CONFIG_SYSTEM_USBMSC_DEVMINOR1
+#  define CONFIG_SYSTEM_USBMSC_DEVMINOR1 0
+#endif
+
+#if CONFIG_SYSTEM_USBMSC_DEVMINOR1 != AT25_MINOR
+#  error Confusion in the assignment of minor device numbers
+#  undef HAVE_AT25
+#endif
+
+/* Debug ********************************************************************/
+
+#ifdef CONFIG_CPP_HAVE_VARARGS
+#  ifdef CONFIG_DEBUG
+#    define message(...) lowsyslog(__VA_ARGS__)
+#    define msgflush()
+#  else
+#    define message(...) printf(__VA_ARGS__)
+#    define msgflush() fflush(stdout)
+#  endif
+#else
+#  ifdef CONFIG_DEBUG
+#    define message lowsyslog
+#    define msgflush()
+#  else
+#    define message printf
+#    define msgflush() fflush(stdout)
+#  endif
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: usbmsc_archinitialize
+ *
+ * Description:
+ *   Perform architecture specific initialization
+ *
+ ****************************************************************************/
+
+int usbmsc_archinitialize(void)
+{
+  /* Initialize the AT25 MTD driver */
+
+#ifdef HAVE_AT25
+  int ret = sam_at25_automount(AT25_MINOR);
+  if (ret < 0)
+    {
+      message("ERROR: sam_at25_automount failed: %d\n", ret);
+    }
+
+  return ret;
+#else
+  return -ENODEV;
+#endif
+}
+
+#endif /* CONFIG_USBMSC */
diff --git a/nuttx/configs/sama5d3-xplained/src/sam_userleds.c b/nuttx/configs/sama5d3-xplained/src/sam_userleds.c
new file mode 100644
index 000000000..e9cfabbb1
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sam_userleds.c
@@ -0,0 +1,162 @@
+/****************************************************************************
+ * configs/sama5d3-xplained/src/sam_userleds.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+/* There are two LEDs on the SAMA5D3 series-CM board that can be controlled
+ * by software.  A  blue LED is controlled via PIO pins.  A red LED normally
+ * provides an indication that power is supplied to the board but can also
+ * be controlled via software.
+ *
+ *   PE25.  This blue LED is pulled high and is illuminated by pulling PE25
+ *   low.
+ *
+ *   PE24.  The red LED is also pulled high but is driven by a transistor so
+ *   that it is illuminated when power is applied even if PE24 is not
+ *   configured as an output.  If PE24 is configured as an output, then the
+ *   LCD is illuminated by a low output.
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <arch/board/board.h>
+
+#include "sam_pio.h"
+#include "sama5d3-xplained.h"
+
+#ifndef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
+ * with CONFIG_DEBUG_VERBOSE too)
+ */
+
+#ifdef CONFIG_DEBUG_LEDS
+#  define leddbg  lldbg
+#  define ledvdbg llvdbg
+#else
+#  define leddbg(x...)
+#  define ledvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Protototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_ledinit
+ ****************************************************************************/
+
+void sam_ledinit(void)
+{
+  /* Configure LED PIOs for output */
+
+  sam_configpio(PIO_BLUE);
+  sam_configpio(PIO_RED);
+}
+
+/****************************************************************************
+ * Name: sam_setled
+ ****************************************************************************/
+
+void sam_setled(int led, bool ledon)
+{
+  uint32_t ledcfg;
+
+  if (led == BOARD_BLUE)
+    {
+      /* Low illuminates */
+
+      ledcfg = PIO_BLUE;
+      ledon  = !ledon;
+    }
+  else if (led == BOARD_RED)
+    {
+      /* High illuminates */
+
+      ledcfg = PIO_RED;
+    }
+  else
+    {
+      return;
+    }
+
+  sam_piowrite(ledcfg, ledon);
+}
+
+/****************************************************************************
+ * Name: sam_setleds
+ ****************************************************************************/
+
+void sam_setleds(uint8_t ledset)
+{
+  bool ledon;
+
+  /* Low illuminates */
+
+  ledon = ((ledset & BOARD_BLUE_BIT) == 0);
+  sam_piowrite(PIO_BLUE, ledon);
+
+  /* High illuminates */
+
+  ledon = ((ledset & BOARD_RED_BIT) != 0);
+  sam_piowrite(PIO_RED, ledon);
+}
+
+#endif /* !CONFIG_ARCH_LEDS */
diff --git a/nuttx/configs/sama5d3-xplained/src/sama5d3-xplained.h b/nuttx/configs/sama5d3-xplained/src/sama5d3-xplained.h
new file mode 100644
index 000000000..1d51ae7c0
--- /dev/null
+++ b/nuttx/configs/sama5d3-xplained/src/sama5d3-xplained.h
@@ -0,0 +1,676 @@
+/************************************************************************************
+ * configs/sama5d3-xplained/src/sama5d3-xplained.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAMA5D3_XPLAINED_SRC_SAMA5D3_XPLAINED_H
+#define __CONFIGS_SAMA5D3_XPLAINED_SRC_SAMA5D3_XPLAINED_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <stdint.h>
+
+#include <arch/irq.h>
+#include <nuttx/irq.h>
+
+#include "chip/sam_pinmap.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* Configuration ************************************************************/
+
+#define HAVE_HSMCI      1
+#define HAVE_AT25       1
+#define HAVE_NAND       1
+#define HAVE_USBHOST    1
+#define HAVE_USBDEV     1
+#define HAVE_USBMONITOR 1
+#define HAVE_NETWORK    1
+
+/* HSMCI */
+/* Can't support MMC/SD if the card interface(s) are not enable */
+
+#if !defined(CONFIG_SAMA5_HSMCI0) && !defined(CONFIG_SAMA5_HSMCI1)
+#  undef HAVE_HSMCI
+#endif
+
+/* Can't support MMC/SD features if mountpoints are disabled */
+
+#if defined(HAVE_HSMCI) && defined(CONFIG_DISABLE_MOUNTPOINT)
+#  warning Mountpoints disabled.  No MMC/SD support
+#  undef HAVE_HSMCI
+#endif
+
+/* We need PIO interrupts on PIOD to support card detect interrupts */
+
+#if defined(HAVE_HSMCI) && !defined(CONFIG_SAMA5_PIOD_IRQ)
+#  warning PIOD interrupts not enabled.  No MMC/SD support.
+#  undef HAVE_HSMCI
+#endif
+
+/* NAND FLASH */
+/* Can't support the NAND device if NAND flash is not configured on EBI CS3 */
+
+#ifndef CONFIG_SAMA5_EBICS3_NAND
+#  undef HAVE_NAND
+#endif
+
+/* Can't support NAND features if mountpoints are disabled or if we were not
+ * asked to mount the NAND part
+ */
+
+#if defined(CONFIG_DISABLE_MOUNTPOINT) || !defined(CONFIG_SAMA5D3XPLAINED_NAND_AUTOMOUNT)
+#  undef HAVE_NAND
+#endif
+
+/* Can't support NAND if the MTD feature is not enabled */
+
+#if !defined(CONFIG_MTD) || !defined(CONFIG_MTD_NAND)
+#  undef HAVE_NAND
+#endif
+
+/* If we are going to mount the NAND, then they user must also have told
+ * us what to do with it by setting one of CONFIG_SAMA5D3XPLAINED_NAND_FTL or
+ * CONFIG_SAMA5D3XPLAINED_NAND_NXFFS.
+ */
+
+#ifndef CONFIG_MTD
+#  undef CONFIG_SAMA5D3XPLAINED_NAND_NXFFS
+#  undef CONFIG_SAMA5D3XPLAINED_NAND_FTL
+#endif
+
+#if !defined(CONFIG_FS_NXFFS) || !defined(CONFIG_NXFFS_NAND)
+#  undef CONFIG_SAMA5D3XPLAINED_NAND_NXFFS
+#endif
+
+#if !defined(CONFIG_SAMA5D3XPLAINED_NAND_FTL) && !defined(CONFIG_SAMA5D3XPLAINED_NAND_NXFFS)
+#  undef HAVE_NAND
+#endif
+
+#if defined(CONFIG_SAMA5D3XPLAINED_NAND_FTL) && defined(CONFIG_SAMA5D3XPLAINED_NAND_NXFFS)
+#  warning Both CONFIG_SAMA5D3XPLAINED_NAND_FTL and CONFIG_SAMA5D3XPLAINED_NAND_NXFFS are set
+#  warning Ignoring CONFIG_SAMA5D3XPLAINED_NAND_NXFFS
+#  undef CONFIG_SAMA5D3XPLAINED_NAND_NXFFS
+#endif
+
+/* AT25 Serial FLASH */
+/* Can't support the AT25 device if it SPI0 or AT25 support are not enabled */
+
+#if !defined(CONFIG_SAMA5_SPI0) || !defined(CONFIG_MTD_AT25)
+#  undef HAVE_AT25
+#endif
+
+/* Can't support AT25 features if mountpoints are disabled or if we were not
+ * asked to mount the AT25 part
+ */
+
+#if defined(CONFIG_DISABLE_MOUNTPOINT) || !defined(CONFIG_SAMA5D3XPLAINED_AT25_AUTOMOUNT)
+#  undef HAVE_AT25
+#endif
+
+/* If we are going to mount the AT25, then they user must also have told
+ * us what to do with it by setting one of these.
+ */
+
+#ifndef CONFIG_FS_NXFFS
+#  undef CONFIG_SAMA5D3XPLAINED_AT25_NXFFS
+#endif
+
+#if !defined(CONFIG_SAMA5D3XPLAINED_AT25_FTL) && !defined(CONFIG_SAMA5D3XPLAINED_AT25_NXFFS)
+#  undef HAVE_AT25
+#endif
+
+#if defined(CONFIG_SAMA5D3XPLAINED_AT25_FTL) && defined(CONFIG_SAMA5D3XPLAINED_AT25_NXFFS)
+#  warning Both CONFIG_SAMA5D3XPLAINED_AT25_FTL and CONFIG_SAMA5D3XPLAINED_AT25_NXFFS are set
+#  warning Ignoring CONFIG_SAMA5D3XPLAINED_AT25_NXFFS
+#  undef CONFIG_SAMA5D3XPLAINED_AT25_NXFFS
+#endif
+
+/* Assign minor device numbers.  For example, if we also use MINOR number 0
+ * for the AT25, it should appear as /dev/mtdblock0
+ */
+
+#define _NAND_MINOR 0
+
+#ifdef HAVE_NAND
+#  define NAND_MINOR  _NAND_MINOR
+#  define _AT25_MINOR (_NAND_MINOR+1)
+#else
+#  define _AT25_MINOR _NAND_MINOR
+#endif
+
+#ifdef HAVE_AT25
+#  define AT25_MINOR  _AT25_MINOR
+#endif
+
+/* MMC/SD minor numbers:  The NSH device minor extended is extended to support
+ * two devices.  If CONFIG_NSH_MMCSDMINOR is zero, these will be:  /dev/mmcsd0
+ * and /dev/mmcsd1.
+ */
+
+#ifndef CONFIG_NSH_MMCSDMINOR
+#  define CONFIG_NSH_MMCSDMINOR 0
+#endif
+
+#ifdef HAVE_HSMCI
+
+#  define HSMCI0_SLOTNO 0
+#  define HSMCI1_SLOTNO 1
+
+#  ifdef CONFIG_SAMA5_HSMCI0
+#     define HSMCI0_MINOR  CONFIG_NSH_MMCSDMINOR
+#     define HSMCI1_MINOR  (CONFIG_NSH_MMCSDMINOR+1)
+#  else
+#     define HSMCI1_MINOR  CONFIG_NSH_MMCSDMINOR
+#  endif
+#else
+#endif
+
+/* USB Host / USB Device */
+/* Either CONFIG_SAMA5_UHPHS or CONFIG_SAMA5_UDPHS must be defined, or there is
+ * no USB of any kind.
+ */
+
+#if !defined(CONFIG_SAMA5_UHPHS)
+#  undef CONFIG_SAMA5_OHCI
+#  undef CONFIG_SAMA5_EHCI
+#endif
+
+#if !defined(CONFIG_SAMA5_UDPHS)
+#  undef HAVE_USBDEV
+#endif
+
+/* CONFIG_USBDEV and CONFIG_USBHOST must also be defined */
+
+#if !defined(CONFIG_USBDEV)
+#  undef HAVE_USBDEV
+#endif
+
+#if defined(CONFIG_USBHOST)
+#  if !defined(CONFIG_SAMA5_OHCI) && !defined(CONFIG_SAMA5_EHCI)
+#    warning CONFIG_USBHOST is defined, but neither CONFIG_SAMA5_OHCI nor CONFIG_SAMA5_EHCI are defined
+#  endif
+#else
+#  undef CONFIG_SAMA5_OHCI
+#  undef CONFIG_SAMA5_EHCI
+#endif
+
+#if !defined(CONFIG_SAMA5_OHCI) && !defined(CONFIG_SAMA5_EHCI)
+#  undef HAVE_USBHOST
+#endif
+
+/* Check if we should enable the USB monitor before starting NSH */
+
+#ifndef CONFIG_SYSTEM_USBMONITOR
+#  undef HAVE_USBMONITOR
+#endif
+
+#ifndef HAVE_USBDEV
+#  undef CONFIG_USBDEV_TRACE
+#endif
+
+#ifndef HAVE_USBHOST
+#  undef CONFIG_USBHOST_TRACE
+#endif
+
+#if !defined(CONFIG_USBDEV_TRACE) && !defined(CONFIG_USBHOST_TRACE)
+#  undef HAVE_USBMONITOR
+#endif
+
+/* Networking */
+
+#if !defined(CONFIG_NET) || (!defined(CONFIG_SAMA5_EMAC) && !defined(CONFIG_SAMA5_GMAC))
+#  undef HAVE_NETWORK
+#endif
+
+/* LEDs *****************************************************************************/
+/* There are two LEDs on the SAMA5D3 series-CM board that can be controlled
+ * by software.  A  blue LED is controlled via PIO pins.  A red LED normally
+ * provides an indication that power is supplied to the board but can also
+ * be controlled via software.
+ *
+ *   PE23.  This blue LED is pulled high and is illuminated by pulling PE23
+ *   low.
+ *
+ *   PE24.  The red LED is also pulled high but is driven by a transistor so
+ *   that it is illuminated when power is applied even if PE24 is not
+ *   configured as an output.  If PE24 is configured as an output, then the
+ *   LCD is illuminated by a high output.
+ */
+
+#define PIO_BLUE     (PIO_OUTPUT | PIO_CFG_PULLUP | PIO_OUTPUT_SET | \
+                      PIO_PORT_PIOE | PIO_PIN23)
+#define PIO_RED      (PIO_OUTPUT | PIO_CFG_PULLUP | PIO_OUTPUT_CLEAR | \
+                      PIO_PORT_PIOE | PIO_PIN24)
+
+/* Buttons **************************************************************************/
+/* There are five push button switches on the SAMA5D3-Xplained base board:
+ *
+ *   1. One Reset, board reset (BP1)
+ *   2. One Wake up, push button to bring the processor out of low power mode
+ *     (BP2)
+ *   3. One User momentary Push Button
+ *   4. One Disable CS Push Button
+ *
+ * Only the user push button is controllable by software (labeled
+ * "PB_USER1" on the board):
+ *
+ *   - PE29.  Pressing the switch connects PE29 to ground.  Therefore, PE29
+ *     must be pulled high internally.  When the button is pressed the SAMA5
+ *     will sense "0" is on PE29.
+ */
+
+#define PIO_USER     (PIO_INPUT | PIO_CFG_PULLUP | PIO_CFG_DEGLITCH | \
+                      PIO_INT_BOTHEDGES | PIO_PORT_PIOE | PIO_PIN29)
+#define IRQ_USER      SAM_IRQ_PE29
+
+/* HSMCI Card Slots *****************************************************************/
+/* The SAMA5D3-Xplained provides a two SD memory card slots:  (1) a full size SD card
+ * slot (J10), and (2) a microSD memory card slot (J11).
+ *
+ * The full size SD card slot connects via HSMCI0.  The card detect discrete
+ * is available on PD17 (pulled high).  The write protect descrete is tied to
+ * ground (via PP6) and not available to software.  The slot supports 8-bit
+ * wide transfer mode, but the NuttX driver currently uses only the 4-bit
+ * wide transfer mode
+ *
+ *   PD17 MCI0_CD
+ *   PD1  MCI0_DA0
+ *   PD2  MCI0_DA1
+ *   PD3  MCI0_DA2
+ *   PD4  MCI0_DA3
+ *   PD5  MCI0_DA4
+ *   PD6  MCI0_DA5
+ *   PD7  MCI0_DA6
+ *   PD8  MCI0_DA7
+ *   PD9  MCI0_CK
+ *   PD0  MCI0_CDA
+ */
+
+#define PIO_MCI0_CD  (PIO_INPUT | PIO_CFG_DEFAULT | PIO_CFG_DEGLITCH | \
+                      PIO_INT_BOTHEDGES | PIO_PORT_PIOD | PIO_PIN17)
+#define IRQ_MCI0_CD   SAM_IRQ_PD17
+
+/* The microSD connects vi HSMCI1.  The card detect discrete is available on
+ * PBD8 (pulled high):
+ *
+ *   PD18  MCI1_CD
+ *   PB20  MCI1_DA0
+ *   PB21  MCI1_DA1
+ *   PB22  MCI1_DA2
+ *   PB23  MCI1_DA3
+ *   PB24  MCI1_CK
+ *   PB19  MCI1_CDA
+ */
+
+#define PIO_MCI1_CD  (PIO_INPUT | PIO_CFG_DEFAULT | PIO_CFG_DEGLITCH | \
+                      PIO_INT_BOTHEDGES | PIO_PORT_PIOD | PIO_PIN18)
+#define IRQ_MCI1_CD   SAM_IRQ_PD18
+
+/* USB Ports ************************************************************************/
+/* The SAMA5D3 series-MB features three USB communication ports:
+ *
+ *   1. Port A Host High Speed (EHCI) and Full Speed (OHCI) multiplexed with
+ *      USB Device High Speed Micro AB connector, J6
+ *
+ *   2. Port B Host High Speed (EHCI) and Full Speed (OHCI) standard type A
+ *      connector, J7 upper port
+ *
+ *   3. Port C Host Full Speed (OHCI) only standard type A connector, J7
+ *      lower port
+ *
+ * The two USB host ports (only) are equipped with 500-mA high-side power
+ * switch for self-powered and bus-powered applications.
+ *
+ * The USB device port A (J6) features a VBUS insert detection function.
+ *
+ *
+ * Port A
+ *
+ *   PIO  Signal Name Function
+ *   ---- ----------- -------------------------------------------------------
+ *   PE9  VBUS_SENSE VBus detection
+ *
+ *     Note: No VBus power switch enable on port A.  I think that this limits
+ *     this port to a device port or as a host port for self-powered devices
+ *     only.
+ */
+
+#define PIO_USBA_VBUS_SENSE \
+                     (PIO_INPUT | PIO_CFG_PULLUP | PIO_CFG_DEGLITCH | \
+                      PIO_INT_BOTHEDGES | PIO_PORT_PIOE | PIO_PIN9)
+#define IRQ_USBA_VBUS_SENSE \
+                     SAM_IRQ_PE9
+
+/* Port B
+ *
+ *   PIO  Signal Name Function
+ *   ---- ----------- -------------------------------------------------------
+ *   PE4  EN5V_USBB   VBus power enable (via MN3 AIC1526 Dual USB High-Side
+ *                    Power Switch).  To the A1 pin of J7 Dual USB A
+ *                    connector
+ */
+
+#define PIO_USBB_VBUS_ENABLE \
+                     (PIO_OUTPUT | PIO_CFG_DEFAULT | PIO_OUTPUT_CLEAR | \
+                      PIO_PORT_PIOE | PIO_PIN4)
+
+/* Port C
+ *
+ *   PIO  Signal Name Function
+ *   ---- ----------- -------------------------------------------------------
+ *   PE3  EN5V_USBC   VBus power enable (via MN3 power switch).  To the B1
+ *                    pin of J7 Dual USB A connector
+ */
+
+#define PIO_USBC_VBUS_ENABLE \
+                     (PIO_OUTPUT | PIO_CFG_DEFAULT | PIO_OUTPUT_CLEAR | \
+                      PIO_PORT_PIOE | PIO_PIN3)
+
+/*  Both Ports B and C
+ *
+ *   PIO  Signal Name Function
+ *   ---- ----------- -------------------------------------------------------
+ *   PE5  OVCUR_USB   Combined over-current indication from port A and B
+ */
+
+#define PIO_USBBC_VBUS_OVERCURRENT \
+                     (PIO_INPUT | PIO_CFG_PULLUP | PIO_CFG_DEGLITCH | \
+                      PIO_INT_BOTHEDGES | PIO_PORT_PIOE | PIO_PIN5)
+#define IRQ_USBBC_VBUS_OVERCURRENT \
+                     SAM_IRQ_PE5
+
+/* Ethernet */
+
+#ifdef CONFIG_SAMA4_EMAC
+ /* ETH1: Ethernet 10/100 (EMAC) Port
+  *
+  * The main board contains a MICREL PHY device (KSZ8051) operating at 10/100 Mbps.
+  * The board supports MII and RMII interface modes.
+  *
+  * The two independent PHY devices embedded on CM and MB boards are connected to
+  * independent RJ-45 connectors with built-in magnetic and status LEDs.
+  *
+  * At the De-Assertion of Reset:
+  *   PHY ADD[2:0]:001
+  *   CONFIG[2:0]:001,Mode:RMII
+  *   Duplex Mode:Half Duplex
+  *   Isolate Mode:Disable
+  *   Speed Mode:100Mbps
+  *   Nway Auto-Negotiation:Enable
+  *
+  * The KSZ8051 PHY interrtup is available on PE30 INT_ETH1
+  */
+
+#define PIO_INT_ETH1 (PIO_INPUT | PIO_CFG_PULLUP | PIO_CFG_DEGLITCH | \
+                      PIO_INT_BOTHEDGES | PIO_PORT_PIOE | PIO_PIN30)
+#define IRQ_INT_ETH1 SAM_IRQ_PE30
+
+#endif
+
+#ifdef CONFIG_SAMA4_GMAC
+  /* ETH0: Tri-Speed Ethernet PHY
+   *
+   * The SAMA5D3 series-CM board is equipped with a MICREL PHY devices (MICREL
+   * KSZ9021/31) operating at 10/100/1000 Mbps. The board supports RGMII interface
+   * mode. The Ethernet interface consists of 4 pairs of low voltage differential
+   * pair signals designated from GRX± and GTx± plus control signals for link
+   * activity indicators. These signals can be used to connect to a 10/100/1000
+   * BaseT RJ45 connector integrated on the main board.
+   *
+   * The KSZ9021/31 interrupt is available on PB35 INT_GETH0
+   */
+
+#define PIO_INT_ETH0 (PIO_INPUT | PIO_CFG_PULLUP | PIO_CFG_DEGLITCH | \
+                      PIO_INT_BOTHEDGES | PIO_PORT_PIOB | PIO_PIN25)
+#define IRQ_INT_ETH0 SAM_IRQ_PB25
+
+#endif
+
+/* SPI Chip Selects *****************************************************************/
+/* Both the Ronetix and Embest versions of the SAMAD3x CPU modules include an
+ * Atmel AT25DF321A, 32-megabit, 2.7-volt SPI serial flash.  The SPI
+ * connection is as follows:
+ *
+ *   AT25DF321A      SAMA5
+ *   --------------- -----------------------------------------------
+ *   SI              PD11 SPI0_MOSI
+ *   SO              PD10 SPI0_MIS0
+ *   SCK             PD12 SPI0_SPCK
+ *   /CS             PD13 via NL17SZ126 if JP1 is closed (See below)
+ *
+ * JP1 and JP2 seem to related to /CS on the Ronetix board, but the usage is
+ * less clear.  For the Embest module, JP1 must be closed to connect /CS to
+ * PD13; on the Ronetix schematic, JP11 seems only to bypass a resistor (may
+ * not be populated?).  I think closing JP1 is correct in either case.
+ */
+
+#define PIO_AT25_NPCS0 (PIO_OUTPUT | PIO_CFG_PULLUP | PIO_OUTPUT_SET | \
+                        PIO_PORT_PIOD | PIO_PIN13)
+#define AT25_PORT      SPI0_CS0
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_spiinitialize
+ *
+ * Description:
+ *   Called to configure SPI chip select PIO pins for the SAMA5D3-Xplained board.
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_SAMA5_SPI0) || defined(CONFIG_SAMA5_SPI1)
+void weak_function sam_spiinitialize(void);
+#endif
+
+/************************************************************************************
+ * Name: board_sdram_config
+ *
+ * Description:
+ *   Configures DDR2 (MT47H128M16RT 128MB or, optionally,  MT47H64M16HR)
+ *
+ *   Per the SAMA5D3-Xplained User guide: "Two SDRAM/DDR2 used as main system memory.
+ *   MT47H128M16 - 2 Gb - 16 Meg x 16 x 8 banks, the board provides up to 2 Gb on-
+ *   board, soldered DDR2 SDRAM. The memory bus is 32 bits wide and operates with
+ *   up to 166 MHz."
+ *
+ *   From the Atmel Code Example:
+ *     MT47H64M16HR : 8 Meg x 16 x 8 banks
+ *     Refresh count: 8K
+ *     Row address: A[12:0] (8K)
+ *     Column address A[9:0] (1K)
+ *     Bank address BA[2:0] a(24,25) (8)
+ *
+ *  This logic was taken from Atmel sample code for the SAMA5D3-Xplained.
+ *
+ *  Input Parameters:
+ *     devtype - Either DDRAM_MT47H128M16RT or DDRAM_MT47H64M16HR
+ *
+ *  Assumptions:
+ *    The DDR memory regions is configured as strongly ordered memory.  When we
+ *    complete initialization of SDRAM and it is ready for use, we will make DRAM
+ *    into normal memory.
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_SAMA5_DDRCS) && !defined(CONFIG_SAMA5_BOOT_SDRAM)
+void sam_sdram_config(void);
+#else
+#  define board_sdram_config(t)
+#endif
+
+/****************************************************************************
+ * Name: sam_nand_automount
+ *
+ * Description:
+ *   Initialize and configure the NAND on CS3
+ *
+ ****************************************************************************/
+
+#ifdef HAVE_NAND
+int sam_nand_automount(int minor);
+#endif
+
+/****************************************************************************
+ * Name: sam_at25_automount
+ *
+ * Description:
+ *   Initialize and configure the AT25 serial FLASH
+ *
+ ****************************************************************************/
+
+#ifdef HAVE_AT25
+int sam_at25_automount(int minor);
+#endif
+
+/****************************************************************************
+ * Name: sam_hsmci_initialize
+ *
+ * Description:
+ *   Initialize and configure one HSMCI slot
+ *
+ ****************************************************************************/
+
+#ifdef HAVE_HSMCI
+int sam_hsmci_initialize(int slotno, int minor);
+#endif
+
+/************************************************************************************
+ * Name: sam_cardinserted
+ *
+ * Description:
+ *   Check if a card is inserted into the selected HSMCI slot
+ *
+ ************************************************************************************/
+
+#ifdef HAVE_HSMCI
+bool sam_cardinserted(int slotno);
+#endif
+
+/************************************************************************************
+ * Name: sam_writeprotected
+ *
+ * Description:
+ *   Check if the card in the MMCSD slot is write protected
+ *
+ ************************************************************************************/
+
+#ifdef HAVE_HSMCI
+bool sam_writeprotected(int slotno);
+#endif
+
+/************************************************************************************
+ * Name: sam_usbinitialize
+ *
+ * Description:
+ *   Called from sam_usbinitialize very early in inialization to setup USB-related
+ *   PIO pins for the SAMA5D3-Xplained board.
+ *
+ ************************************************************************************/
+
+#if defined(CONFIG_SAMA5_UHPHS) || defined(CONFIG_SAMA5_UDPHS)
+void weak_function sam_usbinitialize(void);
+#endif
+
+/****************************************************************************************************
+ * Name: stm32_usbhost_initialize
+ *
+ * Description:
+ *   Called at application startup time to initialize the USB host functionality. This function will
+ *   start a thread that will monitor for device connection/disconnection events.
+ *
+ ****************************************************************************************************/
+
+#ifdef HAVE_USBHOST
+int sam_usbhost_initialize(void);
+#endif
+
+/************************************************************************************
+ * Name: sam_netinitialize
+ *
+ * Description:
+ *   Configure board resources to support networking.
+ *
+ ************************************************************************************/
+
+#ifdef HAVE_NETWORK
+void weak_function sam_netinitialize(void);
+#endif
+
+/************************************************************************************
+ * Name: board_led_initialize
+ ************************************************************************************/
+
+#ifdef CONFIG_ARCH_LEDS
+void board_led_initialize(void);
+#endif
+
+/************************************************************************************
+ * Name: nsh_archinitialize
+ *
+ * Description:
+ *   Perform architecture specific initialization for NSH.
+ *
+ *   CONFIG_NSH_ARCHINIT=y :
+ *     Called from the NSH library
+ *
+ *   CONFIG_BOARD_INITIALIZE=y, CONFIG_NSH_LIBRARY=y, && CONFIG_NSH_ARCHINIT=n :
+ *     Called from board_initialize().
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_NSH_LIBRARY
+int nsh_archinitialize(void);
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_SAMA5D3_XPLAINED_SRC_SAMA5D3_XPLAINED_H */
+
-- 
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