Add configuratin for PJRC Teensy board

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3716 42af7a65-404d-4744-a932-0658087f49c3

19 files changed, 2192 insertions, 19 deletions

diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 500540aaa..f1fa7b597 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -1822,4 +1822,6 @@
 	* configs/amber: This is a placehold for the Atmel ATMega128 Amber Web
 	  Server from SoC Robotics.  Not much present in this directory on initial
 	  check-in.
+	* configs/teensy: Adds a board configuration for the PJRC Teensy++ 2.0 boar
+	  that features an Atmel AT90USB1286 MCU.
 
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index 934cd36f9..3ae99cf64 100644
--- a/nuttx/Documentation/NuttX.html
+++ b/nuttx/Documentation/NuttX.html
@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
-      <p>Last Updated: June 8, 2011</p>
+      <p>Last Updated: June 16, 2011</p>
     </td>
   </tr>
 </table>
@@ -1466,16 +1466,16 @@
   <td><br></td>
   <td>
     <p>
-      <b>ATMega128</b>.
+      <b>SoC Robotics ATMega128</b>.
       This port of NuttX to the Amber Web Server from SoC Robotics
-      (http://www.soc-robotics.com/index.htm) is underway.  The Amber Web Server is
+      (http://www.soc-robotics.com/index.htm) partially complete.  The Amber Web Server is
       based on an Atmel ATMega128.
     </p>
     <ul>
       <p>
        <b>STATUS:</b>
-         This port a work in progress.  It is in the early stage at approximately code
-         complete but with no testing.  This port may be verified for the NuttX 6.5 release.
+         Work on this port has stalled due to toolchain issues.  Complete, but untested
+         code for this port appears in the NuttX 6.5 release.
       </p>
     </ul>
   </td>
@@ -1488,15 +1488,40 @@
   <td><br></td>
   <td>
     <p>
-      <b>AT9USB64x</b> and <b>AT9USB6128x</b>.
+      <b>Micropendous 3 AT9USB64x</b> and <b>AT9USB6128x</b>.
       This port of NuttX to the Opendous Micropendous 3 board. The Micropendous3 is
-      may be populated with an AT90USB646, 647, 1286, or 1287.
+      may be populated with an AT90USB646, 647, 1286, or 1287.  I have only the AT90USB647
+      version for testing.  This version have very limited memory resources: 64Kb of
+      FLASH and 4Kb of SRAM.
     </p>
     <ul>
       <p>
        <b>STATUS:</b>
-         This port a work in progress.  It is in the early stage at approximately code
-         complete but with no testing.  This port may be verified for the NuttX 6.5 release.
+         The basic port was release in NuttX-6.5.  This basic port consists only of
+         a "Hello, World!!" example that demonstrates initialization of the OS,
+         creation of a simple task, and serial console output.  A complete OS
+         test configuration is also available, but this would have to be scaled
+         down quite a bit before it could be executed in the tiny AT90USB SRAM
+         memory.
+      </p>
+    </ul>
+  </td>
+</tr>
+<tr>
+  <td><br></td>
+  <td>
+    <p>
+      <b>PRJC Teensy++ 2.0 AT9USB1286</b>.
+      This is a port of NuttX to the PJRC Teensy++ 2.0 board.
+      This board is developed by http://pjrc.com/teensy/. 
+      The Teensy++ 2.0 is based on an Atmel AT90USB1286 MCU.
+    </p>
+    <ul>
+      <p>
+       <b>STATUS:</b>
+         Work on the Teensy board is just beginning as of this writing.
+         However, because of the great similarity to the Micropendous board,
+         this port should be completed with only a small additional effort.
       </p>
     </ul>
   </td>
@@ -2318,10 +2343,13 @@ nuttx-6.5 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
     * configs/amber: This is a placehold for the Atmel ATMega128 Amber Web
       Server from SoC Robotics.  Not much present in this directory on initial
       check-in.
-
+    * configs/teensy: Adds a board configuration for the PJRC Teensy++ 2.0 boar
+      that features an Atmel AT90USB1286 MCU.
 
 apps-6.5 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
+    * netutils/ftpc:  Simpflication and size reduction.
+
 pascal-3.1 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
 buildroot-1.11 2011-xx-xx &lt;spudmonkey@racsa.co.cr&gt;
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index 09600d386..6c3a0b74a 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -984,7 +984,8 @@ Supported Boards
 
 configs/amber
 	This is placeholder for the SoC Robotics Amber Web Server that is based
-	on the Atmel AVR ATMega128 MCU.  There is not much there yet.
+	on the Atmel AVR ATMega128 MCU.  There is not much there yet and what is
+	there is untested due to tool-related issues.
 
 configs/avr32dev1
 	This is a port of NuttX to the Atmel AVR32DEV1 board.  That board is
@@ -1160,6 +1161,11 @@ configs/stm3210e-evel
 	microcontroller (ARM Cortex-M3).  This port uses the GNU Cortex-M3
 	toolchain.
 
+configs/teensy
+	This is theport of NuttX to the PJRC Teensy++ 2.0 board.  This board is
+	developed by http://pjrc.com/teensy/.  The Teensy++ 2.0 is based
+	on an Atmel AT90USB1286 MCU.
+
 configs/us7032evb1
 	This is a port of the Hitachi SH-1 on the Hitachi SH-1/US7032EVB1 board.
 	STATUS:  Work has just began on this port.
diff --git a/nuttx/configs/amber/README.txt b/nuttx/configs/amber/README.txt
index 391f3e593..39be7fc0e 100644
--- a/nuttx/configs/amber/README.txt
+++ b/nuttx/configs/amber/README.txt
@@ -409,9 +409,9 @@ Amber Web Server Configuration Options
 
        CONFIG_DRAM_SIZE=(8*1024) - (8Kb)
 
-    CONFIG_DRAM_START - The start address of installed DRAM
+    CONFIG_DRAM_START - The start address of installed SRAM
 
-       CONFIG_DRAM_START=0x10000000
+       CONFIG_DRAM_START=0x800100
 
     CONFIG_DRAM_END - Last address+1 of installed RAM
 
diff --git a/nuttx/configs/amber/hello/defconfig b/nuttx/configs/amber/hello/defconfig
index 7bf357a57..fd046d50d 100644
--- a/nuttx/configs/amber/hello/defconfig
+++ b/nuttx/configs/amber/hello/defconfig
@@ -82,7 +82,7 @@ CONFIG_ARCH_BOARD_AMBER=y
 CONFIG_BOARD_LOOPSPERMSEC=8079
 CONFIG_BOARD_LOOPSPERMSEC=(8*100)
 CONFIG_DRAM_SIZE=(4*1024)
-CONFIG_DRAM_START=0x800000
+CONFIG_DRAM_START=0x800100
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
 CONFIG_ARCH_NOINTC=y
 CONFIG_ARCH_IRQPRIO=n
diff --git a/nuttx/configs/amber/ostest/defconfig b/nuttx/configs/amber/ostest/defconfig
index 96c082cf6..e009c6b17 100644
--- a/nuttx/configs/amber/ostest/defconfig
+++ b/nuttx/configs/amber/ostest/defconfig
@@ -81,7 +81,7 @@ CONFIG_ARCH_BOARD=amber
 CONFIG_ARCH_BOARD_AMBER=y
 CONFIG_BOARD_LOOPSPERMSEC=(8*100)
 CONFIG_DRAM_SIZE=(4*1024)
-CONFIG_DRAM_START=0x800000
+CONFIG_DRAM_START=0x800100
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
 CONFIG_ARCH_NOINTC=y
 CONFIG_ARCH_IRQPRIO=n
diff --git a/nuttx/configs/micropendous3/README.txt b/nuttx/configs/micropendous3/README.txt
index fbca28f34..c80cf6be2 100644
--- a/nuttx/configs/micropendous3/README.txt
+++ b/nuttx/configs/micropendous3/README.txt
@@ -424,9 +424,9 @@ Micropendous3 Configuration Options
        CONFIG_DRAM_SIZE=(4*1024) - (4Kb)
        CONFIG_DRAM_SIZE=(8*1024) - (8Kb)
 
-    CONFIG_DRAM_START - The start address of installed DRAM
+    CONFIG_DRAM_START - The start address of installed SRAM
 
-       CONFIG_DRAM_START=0x10000000
+       CONFIG_DRAM_START=0x800100
 
     CONFIG_DRAM_END - Last address+1 of installed RAM
 
diff --git a/nuttx/configs/micropendous3/hello/defconfig b/nuttx/configs/micropendous3/hello/defconfig
index b2b3454ef..92d4f8993 100644
--- a/nuttx/configs/micropendous3/hello/defconfig
+++ b/nuttx/configs/micropendous3/hello/defconfig
@@ -81,7 +81,7 @@ CONFIG_ARCH_BOARD=micropendous3
 CONFIG_ARCH_BOARD_MICROPENDOUS3=y
 CONFIG_BOARD_LOOPSPERMSEC=(8*108)
 CONFIG_DRAM_SIZE=(4*1024)
-CONFIG_DRAM_START=0x800000
+CONFIG_DRAM_START=0x800100
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
 CONFIG_ARCH_NOINTC=y
 CONFIG_ARCH_IRQPRIO=n
diff --git a/nuttx/configs/micropendous3/ostest/defconfig b/nuttx/configs/micropendous3/ostest/defconfig
index e3d69b85b..52852d5ad 100644
--- a/nuttx/configs/micropendous3/ostest/defconfig
+++ b/nuttx/configs/micropendous3/ostest/defconfig
@@ -81,7 +81,7 @@ CONFIG_ARCH_BOARD=micropendous3
 CONFIG_ARCH_BOARD_MICROPENDOUS3=y
 CONFIG_BOARD_LOOPSPERMSEC=(8*108)
 CONFIG_DRAM_SIZE=(4*1024)
-CONFIG_DRAM_START=0x800000
+CONFIG_DRAM_START=0x800100
 CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
 CONFIG_ARCH_NOINTC=y
 CONFIG_ARCH_IRQPRIO=n
diff --git a/nuttx/configs/teensy/README.txt b/nuttx/configs/teensy/README.txt
new file mode 100644
index 000000000..8d828f59f
--- /dev/null
+++ b/nuttx/configs/teensy/README.txt
@@ -0,0 +1,473 @@
+README
+^^^^^
+
+This is the README file for the port of NuttX to the PJRC Teensy++ 2.0 board.
+This board is developed by http://pjrc.com/teensy/.  The Teensy++ 2.0 is based
+on an Atmel AT90USB1286 MCU.
+
+Contents
+^^^^^^^^
+
+  o Teensy++ 2.0 Features
+  o Pin Usage
+  o Halfkey Bootloader
+  o Serial Console
+  o Toolchains
+  o Windows Native Toolchains
+  o NuttX buildroot Toolchain
+  o avr-libc
+  o Teensy++ Configuration Options
+  o Configurations
+
+Teensy++ 2.0 Features
+^^^^^^^^^^^^^^^^^^^^^
+
+  o Based on the 64-pin USB AVR Microcontroller AT90USB1286.
+  o USB Full Speed (12Mbit/s)
+  o USB Device Mode
+  o 120kbof available FLASH memory for programs.
+  o 8 kbytes SRAM and 4 kbytes of EEPROM 
+  o USB powered
+  o 16MHz crystal
+  o 48 General Purpose IO Pins
+
+Pin Usage
+^^^^^^^^^
+
+  AT90USB1286 TQFP64
+  -- ------------------------ ---------------------------------------------
+  PIN SIGNAL                  BOARD CONNECTION
+  -- ------------------------ ---------------------------------------------
+  (left)
+  1  (INT.6/AIN.0) PE6         Pad E6
+  2  (INT.7/AIN.1/UVcon) PE7   Pad E7
+  3  UVcc                      (Voltage circutry)
+  4  D-                        USB DP
+  5  D+                        USB DM
+  6  UGnd                      GND
+  7  UCap                      GND (via cap)
+  8  VBus                      USB VBUS
+  9  (IUID) PE3                N/C
+  10 (SS/PCINT0) PB0           Pad B0
+  11 (PCINT1/SCLK) PB1         Pad B1
+  12 (PDI/PCINT2/MOSI) PB2     Pad B2
+  13 (PDO/PCINT3/MISO) PB3     Pad1 B3
+  14 (PCINT4/OC.2A) PB4        Pad B4
+  15 (PCINT5/OC.1A) PB5        Pad B5
+  16 (PCINT6/OC.1B) PB6        Pad B6
+  (bottom)
+  17 (PCINT7/OC.0A/OC.1C) PB7  Pad B7
+  18 (INT4/TOSC1) PE4          Pad E4
+  19 (INT.5/TOSC2) PE5         Pad E5
+  20 RESET                     Switch pulls to ground
+  21 VCC                       VCC
+  22 GND                       GND
+  23 XTAL2                     XTAL (16MHz)
+  24 XTAL1                     XTAL (16MHz)
+  25 (OC0B/SCL/INT0) PD0       Pad D0
+  26 (OC2B/SDA/INT1) PD1       Pad D1
+  27 (RXD1/INT2) PD2           Pad D2
+  28 (TXD1/INT3) PD3           Pad D3
+  29 (ICP1) PD4                Pad D4
+  30 (XCK1) PD5                Pad D5
+  31 (T1) PD6                  Pad D6, LED
+  32 (T0) PD7                  Pad D7
+  (right)
+  48 PA3 (AD3)                 Pad A3
+  47 PA4 (AD4)                 Pad A4
+  46 PA5 (AD5)                 Pad A5
+  45 PA6 (AD6)                 Pad A6
+  44 PA7 (AD7)                 Pad A7
+  43 PE2 (ALE/HWB)             Pad ALE (Pulled down)
+  42 PC7 (A15/IC.3/CLKO)       Pad C7
+  41 PC6 (A14/OC.3A)           Pad C6
+  40 PC5 (A13/OC.3B)           Pad C5
+  39 PC4 (A12/OC.3C)           Pad C4
+  38 PC3 (A11/T.3)             Pad C3
+  37 PC2 (A10)                 Pad C2
+  36 PC1 (A9)                  Pad C1
+  35 PC0 (A8)                  Pad C0
+  34 PE1 (RD)                  Pad E1
+  33 PE0 (WR)                  Pad E0
+  (top)
+  64 AVCC                      VCC
+  63 GND                       GND
+  62 AREF                      Pad Ref (Capacitor to ground)
+  61 PF0 (ADC0)                Pad F0
+  60 PF1 (ADC1)                Pad F1
+  59 PF2 (ADC2)                Pad F2
+  58 PF3 (ADC3)                Pad F3
+  57 PF4 (ADC4/TCK)            Pad F4
+  56 PF5 (ADC5/TMS)            Pad F5
+  55 PF6 (ADC6/TDO)            Pad F6
+  54 PF7 (ADC7/TDI)            Pad F7
+  53 GND                       GND
+  52 VCC                       VCC
+  51 PA0 (AD0)                 Pad A0
+  50 PA1 (AD1)                 Pad A1
+  49 PA2 (AD2)                 Pad A2
+
+Halfkey Bootloader
+^^^^^^^^^^^^^^^^^^
+
+o Download the Teensy application from http://pjrc.com/teensy/loader.html
+o Instructions are available for your OS at that places as well.
+
+Summary:
+
+1. Start Teensy
+2. Press button on the Teensy board
+3. Select a HEX file (File menu)
+4. Select "program" (Operations menu)
+5. Reboot (Operations menu).
+
+Serial Console
+^^^^^^^^^^^^^^
+
+  A serial console is supported on an external MAX232/MAX3232 Connected
+  on PD2 and PD3:
+
+  Port D, Bit 2: RXD1, Receive Data (Data input pin for the USART1). When
+    the USART1 receiver is enabled this pin is configured as an input
+    regardless of the value of DDD2. When the USART forces this pin to
+    be an input, the pull-up can still be controlled by the PORTD2 bit.
+  Port D, Bit 3: TXD1, Transmit Data (Data output pin for the USART1).
+    When the USART1 Transmitter is enabled, this pin is configured as
+    an output regardless of the value of DDD3.
+
+  AT90USB90128/64 TQFP64
+  -- ------------------------ ---------------------------------------------
+  PIN SIGNAL                  BOARD CONNECTION
+  -- ------------------------ ---------------------------------------------
+  27 (RXD1/INT2) PD2           Pad D2
+  28 (TXD1/INT3) PD3           Pad D3
+
+  Plus Vcc and ground.
+
+Toolchains
+^^^^^^^^^^
+
+Buildroot:
+
+  There is a DIY buildroot version for the AVR boards here:
+  http://sourceforge.net/projects/nuttx/files/buildroot/.  See the
+  following section for details on building this toolchain.
+
+  It is assumed in some places that buildroot toolchain is available
+  at ../misc/buildroot/build_avr.  Edit the setenv.sh file if
+  this is not the case.
+
+  After configuring NuttX, make sure that CONFIG_AVR_BUILDROOT=y is set in your
+  .config file.
+
+WinAVR:
+
+  For Cygwin development environment on Windows machines, you can use
+  WinAVR: http://sourceforge.net/projects/winavr/files/
+
+  It is assumed in some places that WinAVR is installed at C:/WinAVR.  Edit the
+  setenv.sh file if this is not the case.
+
+  After configuring NuttX, make sure that CONFIG_AVR_WINAVR=y is set in your
+  .config file.
+
+  WARNING:  There is an incompatible version of cygwin.dll in the WinAVR/bin
+  directory!  Make sure that the path to the correct cygwin.dll file precedes
+  the path to the WinAVR binaries!
+
+Linux:
+
+  For Linux, there are widely available avr-gcc packages.  On Ubuntu, use:
+  sudo apt-get install gcc-avr gdb-avr avr-libc
+
+  After configuring NuttX, make sure that CONFIG_AVR_LINUXGCC=y is set in your
+  .config file.
+
+Windows Native Toolchains
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+  The WinAVR toolchain is a Windows native toolchain. There are several
+  limitations to using a Windows native 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 not 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 pathes which do
+     not work with the Cygwin make.
+
+     Support has been added for making dependencies with the windows-native
+     toolchains.  That support can be enabled by modifying your Make.defs
+     file as follows:
+
+    -  MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+    +  MKDEP = $(TOPDIR)/tools/mkdeps.sh --winpaths "$(TOPDIR)"
+
+     If you have problems with the dependency build (for example, if you are
+     not building on C:), then you may need to modify tools/mkdeps.sh
+
+  An additional issue with the WinAVR toolchain, in particular, is that it
+  contains an incompatible version of the Cygwin DLL in its bin/ directory.
+  You must take care that the correct Cygwin DLL is used.
+
+NuttX buildroot Toolchain
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+  If NuttX buildroot toolchain source tarball cne 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 Teensy++/<sub-dir>
+
+     NOTE: you also must copy avr-libc header files into the NuttX include
+     directory with command perhaps like:
+
+     cp -a /cygdrive/c/WinAVR/include/avr include/.
+
+  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/avr-defconfig-4.5.2 .config
+
+  6. 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
+  detailed PLUS some special instructions that you will need to follow if you
+  are building a toolchain for Cygwin under Windows.
+
+avr-libc
+^^^^^^^^
+
+Header Files
+
+  In any case, header files from avr-libc are required:  http://www.nongnu.org/avr-libc/.
+  A snapshot of avr-lib is included in the WinAVR installation. For Linux
+  development platforms, avr-libc package is readily available (and would
+  be installed in the apt-get command shown above).  But if you are using
+  the NuttX buildroot configuration on Cygwin, then you will have to build
+  get avr-libc from binaries.
+
+Header File Installation
+
+  The NuttX build will required that the AVR header files be available via
+  the NuttX include directory.  This can be accomplished by either copying
+  the avr-libc header files into the NuttX include directory:
+
+  cp -a <avr-libc-path>/include/avr <nuttx-path>/include/.
+
+  Or simply using a symbolic link:
+
+  ln -s <avr-libc-path>/include/avr <nuttx-path>/include/.
+
+Build Notes:
+
+  It may not necessary to have a built version of avr-lib; only header files
+  are required.  Bu if you choose to use the optimized libraru functions of
+  the flowing point library, then you may have to build avr-lib from sources.
+  Below are instructions for building avr-lib from fresh sources:
+
+  1. Download the avr-libc package from: 
+
+     http://savannah.nongnu.org/projects/avr-libc/
+
+     I am using avr-lib-1.7.1.tar.bz2
+
+  2. Upack the tarball and cd into the 
+ 
+     tar jxf avr-lib-1.7.1.tar.bz2
+     cd avr-lib-1.7.1
+
+  3. Configure avr-lib.  Assuming that WinAVR is installed at the following
+     location:
+
+     export PATH=/cygdrive/c/WinAVR/bin:$PATH
+     ./configure --build=`./config.guess` --host=avr
+
+     This takes a *long* time.
+
+  4. Make avr-lib.
+
+     make
+
+     This also takes a long time because it generates variants for nearly
+     all AVR chips.
+
+  5. Install avr-lib.
+
+     make install
+
+Teensy++ Configuration Options
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+    CONFIG_ARCH - Identifies the arch/ subdirectory.  This should
+       be set to:
+
+       CONFIG_ARCH=avr
+
+    CONFIG_ARCH_family - For use in C code:
+
+       CONFIG_ARCH_AVR=y
+
+    CONFIG_ARCH_architecture - For use in C code:
+
+       CONFIG_ARCH_AT90USB=y
+
+    CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
+
+       CONFIG_ARCH_CHIP=at90usb
+
+    CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
+       chip. 
+
+       CONFIG_ARCH_CHIP_AT90USB1286=y
+
+    CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
+       hence, the board that supports the particular chip or SoC.
+
+       CONFIG_ARCH_BOARD=teensy
+
+    CONFIG_ARCH_BOARD_name - For use in C code
+
+       CONFIG_ARCH_BOARD_TEENSY=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_DRAM_SIZE - Describes the installed DRAM.  One of:
+
+       CONFIG_DRAM_SIZE=(8*1024) - (8Kb)
+
+    CONFIG_DRAM_START - The start address of installed DRAM
+
+       CONFIG_DRAM_START=0x800100
+
+    CONFIG_DRAM_END - Last address+1 of installed RAM
+
+       CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
+
+    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 calibratre
+       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_AVR_INT0=n
+      CONFIG_AVR_INT1=n
+      CONFIG_AVR_INT2=n
+      CONFIG_AVR_INT3=n
+      CONFIG_AVR_INT4=n
+      CONFIG_AVR_INT5=n
+      CONFIG_AVR_INT6=n
+      CONFIG_AVR_INT7=n
+      CONFIG_AVR_USBHOST=n
+      CONFIG_AVR_USBDEV=n
+      CONFIG_AVR_WDT=n
+      CONFIG_AVR_TIMER0=n
+      CONFIG_AVR_TIMER1=n
+      CONFIG_AVR_TIMER2=n
+      CONFIG_AVR_TIMER3=n
+      CONFIG_AVR_SPI=n
+      CONFIG_AVR_USART1=y
+      CONFIG_AVR_ANACOMP=n
+      CONFIG_AVR_ADC=n
+      CONFIG_AVR_TWI=n
+ 
+  If the watchdog is enabled, this specifies the initial timeout.  Default
+  is maximum supported value.
+
+      CONFIG_WDTO_15MS
+      CONFIG_WDTO_30MS
+      CONFIG_WDTO_60MS
+      CONFIG_WDTO_120MS
+      CONFIG_WDTO_1250MS
+      CONFIG_WDTO_500MS
+      CONFIG_WDTO_1S
+      CONFIG_WDTO_2S
+      CONFIG_WDTO_4S
+      CONFIG_WDTO_8S
+
+  AT90USB specific device driver settings
+
+    CONFIG_USARTn_SERIAL_CONSOLE - selects the USARTn for the
+       console and ttys0 (default is no serial console).
+    CONFIG_USARTn_RXBUFSIZE - Characters are buffered as received.
+       This specific the size of the receive buffer
+    CONFIG_USARTn_TXBUFSIZE - Characters are buffered before
+       being sent.  This specific the size of the transmit buffer
+    CONFIG_USARTn_BAUD - The configure BAUD of the USART.  Must be
+    CONFIG_USARTn_BITS - The number of bits.  Must be either 7 or 8.
+    CONFIG_USARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
+    CONFIG_USARTn_2STOP - Two stop bits
+
+Configurations
+^^^^^^^^^^^^^^
+
+Each Teensy++ configuration is maintained in a sudirectory and can
+be selected as follow:
+
+    cd tools
+    ./configure.sh teensy/<subdir>
+    cd -
+    . ./setenv.sh
+
+NOTE: You must also copy avr-libc header files, perhaps like:
+
+     cp -a /cygdrive/c/WinAVR/include/avr include/.
+
+Where <subdir> is one of the following:
+
+  hello:
+    The simple apps/examples/hello "Hello, World!" example.
+
+  ostest:
+    This configuration directory, performs a simple OS test using
+    apps/examples/ostest. NOTE:  The OS test is quite large.  In order
+    to get it to fit within AVR memory constraints, it will probably be
+    necessary to disable some OS features.
diff --git a/nuttx/configs/teensy/hello/Make.defs b/nuttx/configs/teensy/hello/Make.defs
new file mode 100644
index 000000000..c21703af6
--- /dev/null
+++ b/nuttx/configs/teensy/hello/Make.defs
@@ -0,0 +1,149 @@
+############################################################################
+# configs/teensy/hello/Make.defs
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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 ${TOPDIR}/.config
+
+# Setup for the selected toolchain
+
+ifeq ($(CONFIG_AVR_WINAVR),y)
+  # WinAVR toolchain under Windows/Cygwin
+  CROSSDEV = avr-
+  WINTOOL = y
+  MAXOPTIMIZATION = -O2
+  ARCHCPUFLAGS = -mmcu=at90usb647
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+
+ifeq ($(CONFIG_AVR_LINUXGCC),y)
+  # GCC toolchain under Linux
+  CROSSDEV = avr-
+  MAXOPTIMIZATION = -O2
+  ARCHCPUFLAGS = -mmcu=at90usb647
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+
+ifeq ($(CONFIG_AVR_BUILDROOT),y)
+  # NuttX buildroot GCC toolchain under Linux or Cygwin
+  CROSSDEV = avr-elf-
+  MAXOPTIMIZATION = -O2
+  ARCHCPUFLAGS = -mmcu=at90usb647
+  LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+
+ifeq ($(WINTOOL),y)
+  # Windows-native toolchains
+  DIRLINK = $(TOPDIR)/tools/winlink.sh
+  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+  MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
+  ARCHXXINCLUDES = $(ARCHINCLUDES) -w $(TOPDIR)/include/cxx}"
+  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/hello/ld.script}"
+else
+  # Linux/Cygwin-native toolchain 
+  MKDEP = $(TOPDIR)/tools/mkdeps.sh
+  ARCHINCLUDES = -I. -isystem "$(TOPDIR)/include"
+  ARCHXXINCLUDES =  $(ARCHINCLUDES) -isystem "$(TOPDIR)/include/cxx"
+  ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/hello/ld.script
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(CROSSDEV)ar rcs
+NM = $(CROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+  ARCHOPTIMIZATION = -g
+else
+  ARCHOPTIMIZATION = $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX = -Wall -Wshadow
+ARCHDEFINES =
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+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)/binfmt/libnxflat/gnu-nxflat.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+define PREPROCESS
+	@echo "CPP: $1->$2"
+	@$(CPP) $(CPPFLAGS) $1 -o $2
+endef
+
+define COMPILE
+	@echo "CC: $1"
+	@$(CC) -c $(CFLAGS) $1 -o $2
+endef
+
+define COMPILEXX
+	@echo "CXX: $1"
+	@$(CXX) -c $(CXXFLAGS) $1 -o $2
+endef
+
+define ASSEMBLE
+	@echo "AS: $1"
+	@$(CC) -c $(AFLAGS) $1 -o $2
+endef
+
+define ARCHIVE
+	echo "AR: $2"; \
+	$(AR) $1 $2 || { echo "$(AR) $1 $2 FAILED!" ; exit 1 ; }
+endef
+
+define CLEAN
+	@rm -f *.o *.a
+endef
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
+HOSTLDFLAGS =
+
diff --git a/nuttx/configs/teensy/hello/appconfig b/nuttx/configs/teensy/hello/appconfig
new file mode 100644
index 000000000..da49cbd29
--- /dev/null
+++ b/nuttx/configs/teensy/hello/appconfig
@@ -0,0 +1,39 @@
+############################################################################
+# configs/teensy/hello/appconfig
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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.
+#
+############################################################################
+
+# Path to example in apps/examples containing the user_start entry point
+
+CONFIGURED_APPS += examples/hello
+
diff --git a/nuttx/configs/teensy/hello/defconfig b/nuttx/configs/teensy/hello/defconfig
new file mode 100644
index 000000000..d72630a5c
--- /dev/null
+++ b/nuttx/configs/teensy/hello/defconfig
@@ -0,0 +1,815 @@
+############################################################################
+# configs/teensy/hello/defconfig
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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.
+#
+############################################################################
+#
+# architecture selection
+#
+# CONFIG_ARCH - identifies the arch subdirectory and, hence, the
+#   processor architecture.
+# CONFIG_ARCH_family - for use in C code.  This identifies the
+#   particular chip family that the architecture is implemented
+#   in.
+# CONFIG_ARCH_architecture - for use in C code.  This identifies the
+#   specific architecture within the chip family.
+# CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
+# CONFIG_ARCH_CHIP_name - For use in C code
+# CONFIG_ARCH_BOARD - identifies the configs subdirectory and, hence,
+#   the board that supports the particular chip or SoC.
+# CONFIG_ARCH_BOARD_name - for use in C code
+# CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
+# CONFIG_BOARD_LOOPSPERMSEC - for delay loops
+# CONFIG_DRAM_SIZE - Describes the installed DRAM.
+# CONFIG_DRAM_START - The start address of DRAM (physical)
+# CONFIG_DRAM_END - Last address+1 of installed RAM
+# CONFIG_ARCH_NOINTC - define if the architecture does not
+#   support an interrupt controller or otherwise cannot support
+#   APIs like up_enable_irq() and up_disable_irq().
+# CONFIG_ARCH_IRQPRIO - The AT90USB does not support interrupt prioritization
+# 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_BOOTLOADER - Set if you are using a bootloader.
+# CONFIG_ARCH_LEDS -  Use LEDs to show state. Unique to board architecture.
+# CONFIG_ARCH_BUTTONS -  Enable support for buttons. 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_BOARD_LOOPSPERMSEC.  You simply use a stop watch to measure
+#   the 100 second delay then adjust CONFIG_BOARD_LOOPSPERMSEC until
+#   the delay actually is 100 seconds.
+# CONFIG_ARCH_DMA - Support DMA initialization
+#
+CONFIG_ARCH=avr
+CONFIG_ARCH_AVR=y
+CONFIG_ARCH_AT90USB=y
+CONFIG_ARCH_CHIP=at90usb
+CONFIG_ARCH_CHIP_AT90USB1286=y
+CONFIG_ARCH_BOARD=teensy
+CONFIG_ARCH_BOARD_TEENSY=y
+CONFIG_BOARD_LOOPSPERMSEC=(8*108)
+CONFIG_DRAM_SIZE=(8*1024)
+CONFIG_DRAM_START=0x800100
+CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
+CONFIG_ARCH_NOINTC=y
+CONFIG_ARCH_IRQPRIO=n
+CONFIG_ARCH_INTERRUPTSTACK=n
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARCH_BOOTLOADER=n
+CONFIG_ARCH_LEDS=n
+CONFIG_ARCH_BUTTONS=n
+CONFIG_ARCH_CALIBRATION=n
+CONFIG_ARCH_DMA=n
+
+#
+# Identify toolchain and linker options
+#
+CONFIG_AVR_WINAVR=n
+CONFIG_AVR_LINUXGCC=n
+CONFIG_AVR_BUILDROOT=y
+
+#
+#  Individual subsystems can be enabled:
+#
+
+CONFIG_AVR_INT0=n
+CONFIG_AVR_INT1=n
+CONFIG_AVR_INT2=n
+CONFIG_AVR_INT3=n
+CONFIG_AVR_INT4=n
+CONFIG_AVR_INT5=n
+CONFIG_AVR_INT6=n
+CONFIG_AVR_INT7=n
+CONFIG_AVR_USBHOST=n
+CONFIG_AVR_USBDEV=n
+CONFIG_AVR_WDT=n
+CONFIG_AVR_TIMER0=n
+CONFIG_AVR_TIMER1=n
+CONFIG_AVR_TIMER2=n
+CONFIG_AVR_TIMER3=n
+CONFIG_AVR_SPI=n
+CONFIG_AVR_USART1=y
+CONFIG_AVR_ANACOMP=n
+CONFIG_AVR_ADC=n
+CONFIG_AVR_TWI=n
+
+#
+# AT90USB specific serial device driver settings
+#
+# CONFIG_USARTn_SERIAL_CONSOLE - selects the USARTn for the
+#   console and ttys0 (default is the USART1).
+# CONFIG_USARTn_RXBUFSIZE - Characters are buffered as received.
+#   This specific the size of the receive buffer
+# CONFIG_USARTn_TXBUFSIZE - Characters are buffered before
+#   being sent.  This specific the size of the transmit buffer
+# CONFIG_USARTn_BAUD - The configure BAUD of the USART.  Must be
+# CONFIG_USARTn_BITS - The number of bits.  Must be either 7 or 8.
+# CONFIG_USARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
+# CONFIG_USARTn_2STOP - Two stop bits
+#
+CONFIG_USART1_SERIAL_CONSOLE=y
+CONFIG_USART1_TXBUFSIZE=256
+CONFIG_USART1_RXBUFSIZE=256
+CONFIG_USART1_BAUD=38400
+CONFIG_USART1_BITS=8
+CONFIG_USART1_PARITY=0
+CONFIG_USART1_2STOP=0
+
+#
+# General build options
+#
+# CONFIG_RRLOAD_BINARY - make the rrload binary format used with
+#   BSPs from www.ridgerun.com using the tools/mkimage.sh script
+# CONFIG_INTELHEX_BINARY - make the Intel HEX binary format
+#   used with many different loaders using the GNU objcopy program
+#   Should not be selected if you are not using the GNU toolchain.
+# CONFIG_MOTOROLA_SREC - make the Motorola S-Record binary format
+#   used with many different loaders using the GNU objcopy program
+#   Should not be selected if you are not using the GNU toolchain.
+# CONFIG_RAW_BINARY - make a raw binary format file used with many
+#   different loaders using the GNU objcopy program.  This option
+#   should not be selected if you are not using the GNU toolchain.
+# CONFIG_HAVE_LIBM - toolchain supports libm.a
+#
+CONFIG_RRLOAD_BINARY=n
+CONFIG_INTELHEX_BINARY=y
+CONFIG_MOTOROLA_SREC=n
+CONFIG_RAW_BINARY=n
+CONFIG_HAVE_LIBM=n
+
+#
+# General OS setup
+#
+# CONFIG_APPS_DIR - Identifies the relative path to the directory
+#   that builds the application to link with NuttX.  Default: ../apps
+# CONFIG_DEBUG - enables built-in debug options
+# CONFIG_DEBUG_VERBOSE - enables verbose debug output
+# CONFIG_DEBUG_SYMBOLS - build without optimization and with
+#   debug symbols (needed for use with a debugger).
+# CONFIG_MM_REGIONS - If the architecture includes multiple
+#   regions of memory to allocate from, this specifies the
+#   number of memory regions that the memory manager must
+#   handle and enables the API mm_addregion(start, end);
+# CONFIG_ARCH_LOWPUTC - architecture supports low-level, boot
+#   time console output
+# CONFIG_MSEC_PER_TICK - The default system timer is 100Hz
+#   or MSEC_PER_TICK=10.  This setting may be defined to
+#   inform NuttX that the processor hardware is providing
+#   system timer interrupts at some interrupt interval other
+#   than 10 msec.
+# CONFIG_RR_INTERVAL - The round robin timeslice will be set
+#   this number of milliseconds;  Round robin scheduling can
+#   be disabled by setting this value to zero.
+# CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in 
+#   scheduler to monitor system performance
+# CONFIG_TASK_NAME_SIZE - Spcifies that maximum size of a
+#   task name to save in the TCB.  Useful if scheduler
+#   instrumentation is selected.  Set to zero to disable.
+# CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY -
+#   Used to initialize the internal time logic.
+# CONFIG_GREGORIAN_TIME - Enables Gregorian time conversions.
+#   You would only need this if you are concerned about accurate
+#   time conversions in the past or in the distant future.
+# CONFIG_JULIAN_TIME - Enables Julian time conversions. You
+#   would only need this if you are concerned about accurate
+#   time conversion in the distand past.  You must also define
+#   CONFIG_GREGORIAN_TIME in order to use Julian time.
+# CONFIG_DEV_CONSOLE - Set if architecture-specific logic
+#   provides /dev/console.  Enables stdout, stderr, stdin.
+# CONFIG_DEV_LOWCONSOLE - Use the simple, low-level serial console
+#   driver (minimul support)
+# CONFIG_MUTEX_TYPES: Set to enable support for recursive and
+#   errorcheck mutexes. Enables pthread_mutexattr_settype().
+# CONFIG_PRIORITY_INHERITANCE : Set to enable support for priority
+#   inheritance on mutexes and semaphores. 
+# CONFIG_SEM_PREALLOCHOLDERS: This setting is only used if priority
+#   inheritance is enabled.  It defines the maximum number of
+#   different threads (minus one) that can take counts on a
+#   semaphore with priority inheritance support.  This may be 
+#   set to zero if priority inheritance is disabled OR if you
+#   are only using semaphores as mutexes (only one holder) OR
+#   if no more than two threads participate using a counting
+#   semaphore.
+# CONFIG_SEM_NNESTPRIO.  If priority inheritance is enabled,
+#   then this setting is the maximum number of higher priority
+#   threads (minus 1) than can be waiting for another thread
+#   to release a count on a semaphore.  This value may be set
+#   to zero if no more than one thread is expected to wait for
+#   a semaphore.
+# CONFIG_FDCLONE_DISABLE. Disable cloning of all file descriptors
+#   by task_create() when a new task is started.  If set, all
+#   files/drivers will appear to be closed in the new task.
+# CONFIG_FDCLONE_STDIO. Disable cloning of all but the first
+#   three file descriptors (stdin, stdout, stderr) by task_create()
+#   when a new task is started. If set, all files/drivers will
+#   appear to be closed in the new task except for stdin, stdout,
+#   and stderr.
+# CONFIG_SDCLONE_DISABLE. Disable cloning of all socket
+#   desciptors by task_create() when a new task is started. If
+#   set, all sockets will appear to be closed in the new task.
+# CONFIG_SCHED_WORKQUEUE.  Create a dedicated "worker" thread to
+#  handle delayed processing from interrupt handlers.  This feature
+#  is required for some drivers but, if there are not complaints,
+#  can be safely disabled.  The worker thread also performs
+#  garbage collection -- completing any delayed memory deallocations
+#  from interrupt handlers.  If the worker thread is disabled,
+#  then that clean will be performed by the IDLE thread instead
+#  (which runs at the lowest of priority and may not be appropriate
+#  if memory reclamation is of high priority).  If CONFIG_SCHED_WORKQUEUE
+#  is enabled, then the following options can also be used:
+# CONFIG_SCHED_WORKPRIORITY - The execution priority of the worker
+#  thread.  Default: 50
+# CONFIG_SCHED_WORKPERIOD - How often the worker thread checks for
+#  work in units of microseconds.  Default: 50*1000 (50 MS).
+# CONFIG_SCHED_WORKSTACKSIZE - The stack size allocated for the worker
+#  thread.  Default: CONFIG_IDLETHREAD_STACKSIZE.
+# CONFIG_SIG_SIGWORK - The signal number that will be used to wake-up
+#  the worker thread.  Default: 4
+#
+#CONFIG_APPS_DIR=
+CONFIG_DEBUG=n
+CONFIG_DEBUG_VERBOSE=n
+CONFIG_DEBUG_SYMBOLS=n
+CONFIG_DEBUG_SCHED=n
+CONFIG_MM_REGIONS=1
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_RR_INTERVAL=0
+CONFIG_SCHED_INSTRUMENTATION=n
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_START_YEAR=2011
+CONFIG_START_MONTH=6
+CONFIG_START_DAY=16
+CONFIG_GREGORIAN_TIME=n
+CONFIG_JULIAN_TIME=n
+CONFIG_DEV_CONSOLE=y
+CONFIG_DEV_LOWCONSOLE=y
+CONFIG_MUTEX_TYPES=n
+CONFIG_PRIORITY_INHERITANCE=n
+CONFIG_SEM_PREALLOCHOLDERS=0
+CONFIG_SEM_NNESTPRIO=0
+CONFIG_FDCLONE_DISABLE=n
+CONFIG_FDCLONE_STDIO=n
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_SCHED_WORKQUEUE=n
+CONFIG_SCHED_WORKPRIORITY=50
+CONFIG_SCHED_WORKPERIOD=(50*1000)
+CONFIG_SCHED_WORKSTACKSIZE=1024
+CONFIG_SIG_SIGWORK=4
+
+#
+# Settings for nxflat
+# CONFIG_NXFLAT. Enable support for the NXFLAT binary format.
+#  This format will support execution of NuttX binaries located
+#  in a ROMFS filesystem (see examples/nxflat).
+# CONFIG_NXFLAT_DUMPBUFFER. Dump a most buffers that NXFFLAT deals
+#  with.  CONFIG_DEBUG, CONFIG_DEBUG_VERBOSE, and
+#  CONFIG_DEBUG_BINFMT have to be defined or
+#  CONFIG_NXFLAT_DUMPBUFFER does nothing.
+# CONFIG_SYMTAB_ORDEREDBYNAME. Select if the system symbol table
+#  is ordered by symbol name
+#
+CONFIG_NXFLAT=n
+CONFIG_NXFLAT_DUMPBUFFER=n
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+
+#
+# The following can be used to disable categories of
+# APIs supported by the OS.  If the compiler supports
+# weak functions, then it should not be necessary to
+# disable functions unless you want to restrict usage
+# of those APIs.
+#
+# There are certain dependency relationships in these
+# features.
+#
+# o mq_notify logic depends on signals to awaken tasks
+#   waiting for queues to become full or empty.
+# o pthread_condtimedwait() depends on signals to wake
+#   up waiting tasks.
+#
+CONFIG_DISABLE_CLOCK=n
+CONFIG_DISABLE_POSIX_TIMERS=y
+CONFIG_DISABLE_PTHREAD=y
+CONFIG_DISABLE_SIGNALS=y
+CONFIG_DISABLE_MQUEUE=y
+CONFIG_DISABLE_MOUNTPOINT=y
+CONFIG_DISABLE_ENVIRON=y
+CONFIG_DISABLE_POLL=y
+
+#
+# Misc libc settings
+#
+# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a
+#   little smaller if we do not support fieldwidthes
+#
+CONFIG_NOPRINTF_FIELDWIDTH=n
+
+#
+# Allow for architecture optimized implementations
+#
+# The architecture can provide optimized versions of the
+# following to improve system performance
+#
+CONFIG_ARCH_MEMCPY=n
+CONFIG_ARCH_MEMCMP=n
+CONFIG_ARCH_MEMMOVE=n
+CONFIG_ARCH_MEMSET=n
+CONFIG_ARCH_STRCMP=n
+CONFIG_ARCH_STRCPY=n
+CONFIG_ARCH_STRNCPY=n
+CONFIG_ARCH_STRLEN=n
+CONFIG_ARCH_STRNLEN=n
+CONFIG_ARCH_BZERO=n
+
+#
+# Sizes of configurable things (0 disables)
+#
+# CONFIG_MAX_TASKS - The maximum number of simultaneously
+#   active tasks.  This value must be a power of two.
+# CONFIG_MAX_TASK_ARGS - This controls the maximum number of
+#   of parameters that a task may receive (i.e., maxmum value
+#   of 'argc')
+# CONFIG_NPTHREAD_KEYS - The number of items of thread-
+#   specific data that can be retained
+# CONFIG_NFILE_DESCRIPTORS - The maximum number of file
+#   descriptors (one for each open)
+# CONFIG_NFILE_STREAMS - The maximum number of streams that
+#   can be fopen'ed
+# CONFIG_NAME_MAX - The maximum size of a file name.
+# CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate
+#   on fopen. (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_NUNGET_CHARS - Number of characters that can be
+#   buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message
+#   structures.  The system manages a pool of preallocated
+#   message structures to minimize dynamic allocations
+# CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with
+#   a fixed payload size given by this settin (does not include
+#   other message structure overhead.
+# CONFIG_MAX_WDOGPARMS - Maximum number of parameters that
+#   can be passed to a watchdog handler
+# CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog
+#   structures.  The system manages a pool of preallocated
+#   watchdog structures to minimize dynamic allocations
+# CONFIG_PREALLOC_TIMERS - The number of pre-allocated POSIX
+#   timer structures.  The system manages a pool of preallocated
+#   timer structures to minimize dynamic allocations.  Set to
+#   zero for all dynamic allocations.
+#
+CONFIG_MAX_TASKS=4
+CONFIG_MAX_TASK_ARGS=4
+CONFIG_NPTHREAD_KEYS=0
+CONFIG_NFILE_DESCRIPTORS=4
+CONFIG_NFILE_STREAMS=4
+CONFIG_NAME_MAX=32
+CONFIG_STDIO_BUFFER_SIZE=0
+CONFIG_NUNGET_CHARS=0
+CONFIG_PREALLOC_MQ_MSGS=0
+CONFIG_MQ_MAXMSGSIZE=0
+CONFIG_MAX_WDOGPARMS=2
+CONFIG_PREALLOC_WDOGS=4
+CONFIG_PREALLOC_TIMERS=0
+
+#
+# Filesystem configuration
+#
+# CONFIG_FS_FAT - Enable FAT filesystem support
+# CONFIG_FAT_SECTORSIZE - Max supported sector size
+# CONFIG_FS_ROMFS - Enable ROMFS filesystem support
+#
+CONFIG_FS_FAT=n
+CONFIG_FS_ROMFS=n
+
+#
+# SPI-based MMC/SD driver
+#
+# CONFIG_MMCSD_NSLOTS
+#   Number of MMC/SD slots supported by the driver
+# CONFIG_MMCSD_READONLY
+#   Provide read-only access (default is read/write)
+# CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card.
+#   Default is 20MHz.
+#
+CONFIG_MMCSD_NSLOTS=1
+CONFIG_MMCSD_READONLY=n
+CONFIG_MMCSD_SPICLOCK=12500000
+
+#
+# Block driver buffering
+#
+# CONFIG_FS_READAHEAD
+#   Enable read-ahead buffering
+# CONFIG_FS_WRITEBUFFER
+#   Enable write buffering
+#
+CONFIG_FS_READAHEAD=n
+CONFIG_FS_WRITEBUFFER=n
+
+#
+# SDIO-based MMC/SD driver
+#
+# CONFIG_SDIO_DMA
+#   SDIO driver supports DMA
+# CONFIG_MMCSD_MMCSUPPORT
+#   Enable support for MMC cards
+# CONFIG_MMCSD_HAVECARDDETECT
+#   SDIO driver card detection is 100% accurate
+#
+CONFIG_SDIO_DMA=n
+CONFIG_MMCSD_MMCSUPPORT=n
+CONFIG_MMCSD_HAVECARDDETECT=n
+
+#
+# TCP/IP and UDP support via uIP
+# CONFIG_NET - Enable or disable all network features
+# CONFIG_NET_IPv6 - Build in support for IPv6
+# CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors per task/thread.
+# CONFIG_NET_SOCKOPTS - Enable or disable support for socket options
+# CONFIG_NET_BUFSIZE - uIP buffer size
+# CONFIG_NET_TCP - TCP support on or off
+# CONFIG_NET_TCP_CONNS - Maximum number of TCP connections (all tasks)
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE - Size of TCP read-ahead buffers
+# CONFIG_NET_NTCP_READAHEAD_BUFFERS - Number of TCP read-ahead buffers (may be zero)
+# CONFIG_NET_TCPBACKLOG - Incoming connections pend in a backlog until
+#   accept() is called. The size of the backlog is selected when listen() is called.
+# CONFIG_NET_MAX_LISTENPORTS - Maximum number of listening TCP ports (all tasks)
+# CONFIG_NET_UDP - UDP support on or off
+# CONFIG_NET_UDP_CHECKSUMS - UDP checksums on or off
+# CONFIG_NET_UDP_CONNS - The maximum amount of concurrent UDP connections
+# CONFIG_NET_ICMP - ICMP ping response support on or off
+# CONFIG_NET_ICMP_PING - ICMP ping request support on or off
+# CONFIG_NET_PINGADDRCONF - Use "ping" packet for setting IP address
+# CONFIG_NET_STATISTICS - uIP statistics on or off
+# CONFIG_NET_RECEIVE_WINDOW - The size of the advertised receiver's window
+# CONFIG_NET_ARPTAB_SIZE - The size of the ARP table
+# CONFIG_NET_BROADCAST - Broadcast support
+# CONFIG_NET_FWCACHE_SIZE - number of packets to remember when looking for duplicates
+#
+CONFIG_NET=n
+CONFIG_NET_IPv6=n
+CONFIG_NSOCKET_DESCRIPTORS=0
+CONFIG_NET_SOCKOPTS=y
+CONFIG_NET_BUFSIZE=420
+CONFIG_NET_TCP=n
+CONFIG_NET_TCP_CONNS=40
+CONFIG_NET_MAX_LISTENPORTS=40
+CONFIG_NET_UDP=n
+CONFIG_NET_UDP_CHECKSUMS=y
+#CONFIG_NET_UDP_CONNS=10
+CONFIG_NET_ICMP=n
+CONFIG_NET_ICMP_PING=n
+#CONFIG_NET_PINGADDRCONF=0
+CONFIG_NET_STATISTICS=y
+#CONFIG_NET_RECEIVE_WINDOW=
+#CONFIG_NET_ARPTAB_SIZE=8
+CONFIG_NET_BROADCAST=n
+#CONFIG_NET_FWCACHE_SIZE=2
+
+#
+# UIP Network Utilities
+# CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP
+# CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries
+#
+CONFIG_NET_DHCP_LIGHT=n
+CONFIG_NET_RESOLV_ENTRIES=4
+
+#
+# USB Device Configuration
+#
+# CONFIG_USBDEV
+#   Enables USB device support
+# CONFIG_USBDEV_ISOCHRONOUS
+#   Build in extra support for isochronous endpoints
+# CONFIG_USBDEV_DUALSPEED
+#   Hardware handles high and full speed operation (USB 2.0)
+# CONFIG_USBDEV_SELFPOWERED
+#   Will cause USB features to indicate that the device is
+#   self-powered
+# CONFIG_USBDEV_MAXPOWER
+#   Maximum power consumption in mA
+# CONFIG_USBDEV_TRACE
+#   Enables USB tracing for debug
+# CONFIG_USBDEV_TRACE_NRECORDS
+#   Number of trace entries to remember
+#
+CONFIG_USBDEV=n
+CONFIG_USBDEV_ISOCHRONOUS=n
+CONFIG_USBDEV_DUALSPEED=n
+CONFIG_USBDEV_SELFPOWERED=y
+CONFIG_USBDEV_REMOTEWAKEUP=n
+CONFIG_USBDEV_MAXPOWER=100
+CONFIG_USBDEV_TRACE=n
+CONFIG_USBDEV_TRACE_NRECORDS=128
+
+#
+# USB Serial Device Configuration
+#
+# CONFIG_USBSER
+#   Enable compilation of the USB serial driver
+# CONFIG_USBSER_EPINTIN
+#   The logical 7-bit address of a hardware endpoint that supports
+#   interrupt IN operation
+# CONFIG_USBSER_EPBULKOUT
+#   The logical 7-bit address of a hardware endpoint that supports
+#   bulk OUT operation
+# CONFIG_USBSER_EPBULKIN
+#   The logical 7-bit address of a hardware endpoint that supports
+#   bulk IN operation
+# # CONFIG_USBSER_NWRREQS and CONFIG_USBSER_NRDREQS
+#   The number of write/read requests that can be in flight
+# CONFIG_USBSER_VENDORID and CONFIG_USBSER_VENDORSTR
+#   The vendor ID code/string
+# CONFIG_USBSER_PRODUCTID and CONFIG_USBSER_PRODUCTSTR
+#   The product ID code/string
+# CONFIG_USBSER_RXBUFSIZE and CONFIG_USBSER_TXBUFSIZE
+#   Size of the serial receive/transmit buffers
+#
+CONFIG_USBSER=n
+CONFIG_USBSER_EPINTIN=1
+CONFIG_USBSER_EPBULKOUT=2
+CONFIG_USBSER_EPBULKIN=5
+CONFIG_USBSER_NWRREQS=4
+CONFIG_USBSER_NRDREQS=4
+CONFIG_USBSER_VENDORID=0x067b
+CONFIG_USBSER_PRODUCTID=0x2303
+CONFIG_USBSER_VENDORSTR="Nuttx"
+CONFIG_USBSER_PRODUCTSTR="USBdev Serial"
+CONFIG_USBSER_RXBUFSIZE=512
+CONFIG_USBSER_TXBUFSIZE=512
+
+#
+# USB Storage Device Configuration
+#
+# CONFIG_USBSTRG
+#   Enable compilation of the USB storage driver
+# CONFIG_USBSTRG_EP0MAXPACKET
+#   Max packet size for endpoint 0
+# CONFIG_USBSTRG_EPBULKOUT and CONFIG_USBSTRG_EPBULKIN
+#   The logical 7-bit address of a hardware endpoints that support
+#   bulk OUT and IN operations
+# CONFIG_USBSTRG_NWRREQS and CONFIG_USBSTRG_NRDREQS
+#   The number of write/read requests that can be in flight
+# CONFIG_USBSTRG_BULKINREQLEN and CONFIG_USBSTRG_BULKOUTREQLEN
+#   The size of the buffer in each write/read request.  This
+#   value needs to be at least as large as the endpoint
+#   maxpacket and ideally as large as a block device sector.
+# CONFIG_USBSTRG_VENDORID and CONFIG_USBSTRG_VENDORSTR
+#   The vendor ID code/string
+# CONFIG_USBSTRG_PRODUCTID and CONFIG_USBSTRG_PRODUCTSTR
+#   The product ID code/string
+# CONFIG_USBSTRG_REMOVABLE
+#   Select if the media is removable
+#
+CONFIG_USBSTRG=n
+CONFIG_USBSTRG_EP0MAXPACKET=64
+CONFIG_USBSTRG_EPBULKOUT=2
+CONFIG_USBSTRG_EPBULKIN=5
+CONFIG_USBSTRG_NRDREQS=2
+CONFIG_USBSTRG_NWRREQS=2
+CONFIG_USBSTRG_BULKINREQLEN=256
+CONFIG_USBSTRG_BULKOUTREQLEN=256
+CONFIG_USBSTRG_VENDORID=0x584e
+CONFIG_USBSTRG_VENDORSTR="NuttX"
+CONFIG_USBSTRG_PRODUCTID=0x5342
+CONFIG_USBSTRG_PRODUCTSTR="USBdev Storage"
+CONFIG_USBSTRG_VERSIONNO=0x0399
+CONFIG_USBSTRG_REMOVABLE=y
+
+#
+# Settings for examples/uip
+#
+CONFIG_EXAMPLE_UIP_IPADDR=(10<<24|0<<16|0<<8|2)
+CONFIG_EXAMPLE_UIP_DRIPADDR=(10<<24|0<<16|0<<8|1)
+CONFIG_EXAMPLE_UIP_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_EXAMPLE_UIP_DHCPC=n
+
+#
+# Settings for examples/nettest
+#
+# CONFIG_EXAMPLE_NETTEST_SERVER - The target board can act
+#   as either the client side or server side of the test
+# CONFIG_EXAMPLE_NETTEST_PERFORMANCE - If set, then the
+#   client side simply receives messages forever, allowing
+#   measurement of throughput
+# CONFIG_EXAMPLE_NETTEST_NOMAC - Set if the hardware has
+#   no MAC address; one will be assigned
+# CONFIG_EXAMPLE_NETTEST_IPADDR - Target board IP address
+# CONFIG_EXAMPLE_NETTEST_DRIPADDR - Default router address
+# CONFIG_EXAMPLE_NETTEST_NETMASK - Network mask
+# CONFIG_EXAMPLE_NETTEST_CLIENTIP - IP address of the
+#   client side of the test (may be target or host)
+#
+CONFIG_EXAMPLE_NETTEST_SERVER=n
+CONFIG_EXAMPLE_NETTEST_PERFORMANCE=n
+CONFIG_EXAMPLE_NETTEST_NOMAC=y
+CONFIG_EXAMPLE_NETTEST_IPADDR=(10<<24|0<<16|0<<8|2)
+CONFIG_EXAMPLE_NETTEST_DRIPADDR=(10<<24|0<<16|0<<8|1)
+CONFIG_EXAMPLE_NETTEST_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_EXAMPLE_NETTEST_CLIENTIP=(10<<24|0<<16|0<<8|1)
+
+#
+# Settings for examples/ostest
+#
+CONFIG_EXAMPLES_OSTEST_LOOPS=1
+CONFIG_EXAMPLES_OSTEST_STACKSIZE=1024
+CONFIG_EXAMPLES_OSTEST_NBARRIER_THREADS=3
+
+#
+# Settings for apps/nshlib
+#
+# CONFIG_NSH_FILEIOSIZE - Size of a static I/O buffer
+# CONFIG_NSH_STRERROR - Use strerror(errno)
+# CONFIG_NSH_LINELEN - Maximum length of one command line
+# CONFIG_NSH_STACKSIZE - Stack size to use for new threads.
+# CONFIG_NSH_NESTDEPTH - Max number of nested if-then[-else]-fi
+# CONFIG_NSH_DISABLESCRIPT - Disable scripting support
+# CONFIG_NSH_DISABLEBG - Disable background commands
+# CONFIG_NSH_ROMFSETC - Use startup script in /etc
+# CONFIG_NSH_CONSOLE - Use serial console front end
+# CONFIG_NSH_TELNET - Use telnetd console front end
+# CONFIG_NSH_ARCHINIT - Platform provides architecture
+#   specific initialization (nsh_archinitialize()).
+#
+# If CONFIG_NSH_TELNET is selected:
+# CONFIG_NSH_IOBUFFER_SIZE -- Telnetd I/O buffer size
+# CONFIG_NSH_DHCPC - Obtain address using DHCP
+# CONFIG_NSH_IPADDR - Provides static IP address
+# CONFIG_NSH_DRIPADDR - Provides static router IP address
+# CONFIG_NSH_NETMASK - Provides static network mask
+# CONFIG_NSH_NOMAC - Use a bogus MAC address
+#
+# If CONFIG_NSH_ROMFSETC is selected:
+# CONFIG_NSH_ROMFSMOUNTPT - ROMFS mountpoint
+# CONFIG_NSH_INITSCRIPT - Relative path to init script
+# CONFIG_NSH_ROMFSDEVNO - ROMFS RAM device minor
+# CONFIG_NSH_ROMFSSECTSIZE - ROMF sector size
+# CONFIG_NSH_FATDEVNO - FAT FS RAM device minor
+# CONFIG_NSH_FATSECTSIZE - FAT FS sector size
+# CONFIG_NSH_FATNSECTORS - FAT FS number of sectors
+# CONFIG_NSH_FATMOUNTPT - FAT FS mountpoint
+#
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_STRERROR=n
+CONFIG_NSH_LINELEN=64
+CONFIG_NSH_STACKSIZE=1024
+CONFIG_NSH_NESTDEPTH=3
+CONFIG_NSH_DISABLESCRIPT=n
+CONFIG_NSH_DISABLEBG=n
+CONFIG_NSH_ROMFSETC=n
+CONFIG_NSH_CONSOLE=y
+CONFIG_NSH_TELNET=n
+CONFIG_NSH_ARCHINIT=n
+CONFIG_NSH_IOBUFFER_SIZE=512
+CONFIG_NSH_DHCPC=n
+CONFIG_NSH_NOMAC=n
+CONFIG_NSH_IPADDR=(10<<24|0<<16|0<<8|2)
+CONFIG_NSH_DRIPADDR=(10<<24|0<<16|0<<8|1)
+CONFIG_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_NSH_ROMFSMOUNTPT="/etc"
+CONFIG_NSH_INITSCRIPT="init.d/rcS"
+CONFIG_NSH_ROMFSDEVNO=0
+CONFIG_NSH_ROMFSSECTSIZE=64
+CONFIG_NSH_FATDEVNO=1
+CONFIG_NSH_FATSECTSIZE=512
+CONFIG_NSH_FATNSECTORS=1024
+CONFIG_NSH_FATMOUNTPT=/tmp
+
+#
+# Architecture-specific NSH options
+#
+CONFIG_NSH_MMCSDSPIPORTNO=1
+CONFIG_NSH_MMCSDSLOTNO=0
+CONFIG_NSH_MMCSDMINOR=0
+
+#
+# Settings for examples/usbserial
+#
+# CONFIG_EXAMPLES_USBSERIAL_INONLY
+#    Only verify IN (device-to-host) data transfers.  Default: both
+# CONFIG_EXAMPLES_USBSERIAL_OUTONLY
+#    Only verify OUT (host-to-device) data transfers.  Default: both
+# CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL
+#    Send only small, single packet messages.  Default: Send large and small.
+# CONFIG_EXAMPLES_USBSERIAL_ONLYBIG
+#    Send only large, multi-packet messages.  Default: Send large and small.
+#
+CONFIG_EXAMPLES_USBSERIAL_INONLY=n
+CONFIG_EXAMPLES_USBSERIAL_OUTONLY=n
+CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL=n
+CONFIG_EXAMPLES_USBSERIAL_ONLYBIG=n
+
+CONFIG_EXAMPLES_USBSERIAL_TRACEINIT=n
+CONFIG_EXAMPLES_USBSERIAL_TRACECLASS=n
+CONFIG_EXAMPLES_USBSERIAL_TRACETRANSFERS=n
+CONFIG_EXAMPLES_USBSERIAL_TRACECONTROLLER=n
+CONFIG_EXAMPLES_USBSERIAL_TRACEINTERRUPTS=n
+
+#
+# Settings for examples/usbstorage
+#
+# CONFIG_EXAMPLES_USBSTRG_NLUNS
+#    Defines the number of logical units (LUNs) exported by the USB storage
+#    driver.  Each LUN corresponds to one exported block driver (or partition
+#    of a block driver).  May be 1, 2, or 3.  Default is 1.
+# CONFIG_EXAMPLES_USBSTRG_DEVMINOR1
+#    The minor device number of the block driver for the first LUN. For
+#    example, N in /dev/mmcsdN.  Used for registering the block driver. Default
+#    is zero.
+# CONFIG_EXAMPLES_USBSTRG_DEVPATH1
+#    The full path to the registered block driver.  Default is "/dev/mmcsd0"
+#  CONFIG_EXAMPLES_USBSTRG_DEVMINOR2 and CONFIG_EXAMPLES_USBSTRG_DEVPATH2
+#    Similar parameters that would have to be provided if CONFIG_EXAMPLES_USBSTRG_NLUNS
+#    is 2 or 3.  No defaults.
+#  CONFIG_EXAMPLES_USBSTRG_DEVMINOR3 and CONFIG_EXAMPLES_USBSTRG_DEVPATH3
+#    Similar parameters that would have to be provided if CONFIG_EXAMPLES_USBSTRG_NLUNS
+#    is 3.  No defaults.
+#
+#  If CONFIG_USBDEV_TRACE is enabled (or CONFIG_DEBUG and CONFIG_DEBUG_USB), then
+#  the example code will also manage the USB trace output.  The amount of trace output
+#  can be controlled using:
+#
+#  CONFIG_EXAMPLES_USBSTRG_TRACEINIT
+#    Show initialization events
+#  CONFIG_EXAMPLES_USBSTRG_TRACECLASS
+#    Show class driver events
+#  CONFIG_EXAMPLES_USBSTRG_TRACETRANSFERS
+#    Show data transfer events
+#  CONFIG_EXAMPLES_USBSTRG_TRACECONTROLLER
+#    Show controller events
+#  CONFIG_EXAMPLES_USBSTRG_TRACEINTERRUPTS
+#    Show interrupt-related events.
+#
+CONFIG_EXAMPLES_USBSTRG_NLUNS=1
+CONFIG_EXAMPLES_USBSTRG_DEVMINOR1=0
+CONFIG_EXAMPLES_USBSTRG_DEVPATH1="/dev/mmcsd0"
+CONFIG_EXAMPLES_USBSTRG_TRACEINIT=n
+CONFIG_EXAMPLES_USBSTRG_TRACECLASS=n
+CONFIG_EXAMPLES_USBSTRG_TRACETRANSFERS=n
+CONFIG_EXAMPLES_USBSTRG_TRACECONTROLLER=n
+CONFIG_EXAMPLES_USBSTRG_TRACEINTERRUPTS=n
+
+#
+# Stack and heap information
+#
+# CONFIG_BOOT_RUNFROMFLASH - Some configurations support XIP
+#   operation from FLASH but must copy initialized .data sections to RAM.
+#   (should also be =n for the AT90USB which always runs from flash)
+# CONFIG_BOOT_COPYTORAM -  Some configurations boot in FLASH
+#   but copy themselves entirely into RAM for better performance.
+# CONFIG_CUSTOM_STACK - The up_ implementation will handle
+#   all stack operations outside of the nuttx model.
+# CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
+# CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
+# CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
+# CONFIG_HEAP_BASE - The beginning of the heap
+# CONFIG_HEAP_SIZE - The size of the heap
+#
+CONFIG_BOOT_RUNFROMFLASH=n
+CONFIG_BOOT_COPYTORAM=n
+CONFIG_CUSTOM_STACK=n
+CONFIG_STACK_POINTER=
+CONFIG_IDLETHREAD_STACKSIZE=512
+CONFIG_USERMAIN_STACKSIZE=512
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=1024
+CONFIG_HEAP_BASE=
+CONFIG_HEAP_SIZE=
diff --git a/nuttx/configs/teensy/hello/ld.script b/nuttx/configs/teensy/hello/ld.script
new file mode 100644
index 000000000..791e96bfc
--- /dev/null
+++ b/nuttx/configs/teensy/hello/ld.script
@@ -0,0 +1,210 @@
+/************************************************************************************
+ * configs/teensy/hello/ld.script
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ *
+ ************************************************************************************/
+
+/* Memory Regions *******************************************************************/
+/* ------------ ------ ------+------- -- ------ -- ------ --- ------ ----+------- ---
+ *              FLASH        | REGISTERS I/O       EXT I/O    ISRAM      | EEPROM
+ *                           |           REGISTERS REGISTERS             |
+ * ------------ ------ ------+------- -- ------ -- ------ --- ------ ----+------- ---
+ * AT90USB1286  0x0000 128Kb | 0x0000 32 0x0020 64 0x0060 160 0x0100 8Kb | 0x0000 4Kb
+ * ------------ ------ ------+------- -- ------ -- ------ --- ------ ----+------- ---
+ */
+
+MEMORY
+{
+	flash    (rx) : ORIGIN = 0, LENGTH = 128K
+	sram   (rw!x) : ORIGIN = 0x800100, LENGTH = 8K
+	eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = 4K
+}
+
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+ENTRY(__start)
+
+SECTIONS
+{
+	/* Read-only sections, merged into text segment: */
+
+	.hash			: { *(.hash) }
+	.dynsym			: { *(.dynsym) }
+	.dynstr			: { *(.dynstr) }
+	.gnu.version	: { *(.gnu.version) }
+	.gnu.version_d	: { *(.gnu.version_d) }
+	.gnu.version_r	: { *(.gnu.version_r) }
+	.rel.init		: { *(.rel.init) }
+	.rela.init		: { *(.rela.init) }
+
+	.rel.text		:
+		{
+			*(.rel.text)
+			*(.rel.text.*)
+			*(.rel.gnu.linkonce.t*)
+		}
+
+	.rela.text		:
+		{
+			*(.rela.text)
+			*(.rela.text.*)
+			*(.rela.gnu.linkonce.t*)
+		}
+
+	.rel.fini		: { *(.rel.fini) }
+	.rela.fini		: { *(.rela.fini) }
+
+	.rel.rodata		:
+		{
+			*(.rel.rodata)
+			*(.rel.rodata.*)
+			*(.rel.gnu.linkonce.r*)
+		}
+
+	.rela.rodata	:
+		{
+			*(.rela.rodata)
+			*(.rela.rodata.*)
+			*(.rela.gnu.linkonce.r*)
+		}
+
+	.rel.data		:
+		{
+			*(.rel.data)
+			*(.rel.data.*)
+			*(.rel.gnu.linkonce.d*)
+		}
+
+	.rela.data		:
+		{
+			*(.rela.data)
+			*(.rela.data.*)
+			*(.rela.gnu.linkonce.d*)
+		}
+
+	.rel.ctors		: { *(.rel.ctors) }
+	.rela.ctors		: { *(.rela.ctors) }
+	.rel.dtors		: { *(.rel.dtors) }
+	.rela.dtors		: { *(.rela.dtors) }
+	.rel.got		: { *(.rel.got) }
+	.rela.got		: { *(.rela.got) }
+	.rel.bss		: { *(.rel.bss) }
+	.rela.bss		: { *(.rela.bss) }
+	.rel.plt		: { *(.rel.plt) }
+	.rela.plt		: { *(.rela.plt) }
+
+	.text			:
+	{
+		_stext = . ;
+		*(.vectors)
+		*(.init)
+		*(.handlers)
+		*(.text)
+		*(.text.*)
+		_etext = . ;
+	} > flash
+
+	_eronly = ABSOLUTE(.);
+
+	.data			:
+	{
+		_sdata = ABSOLUTE(.);
+		*(.data .data.*)
+		*(.gnu.linkonce.d.*)
+		CONSTRUCTORS
+		_edata = ABSOLUTE(.);
+	} > sram AT > flash
+
+	.bss			:
+	{
+		_sbss = ABSOLUTE(.);
+		*(.bss .bss.*)
+		*(.gnu.linkonce.b.*)
+		*(COMMON)
+		_ebss = ABSOLUTE(.);
+	} > sram
+
+	/* Global data not cleared after reset.	*/
+
+	.noinit			:
+	{
+		_snoinit = ABSOLUTE(.);
+		*(.noinit*)
+		_enoinit = ABSOLUTE(.);
+	}	> sram
+
+	.eeprom			:
+	{
+		_seeprom = ABSOLUTE(.);
+		*(.eeprom*)
+		_eeeprom = ABSOLUTE(.);
+	}	> eeprom
+
+	/* 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) }
+
+	/* DWARF debug sections.
+		 Symbols in the DWARF debugging sections are relative to the beginning
+		 of the section so we begin them at 0.	*/
+
+	/* DWARF 1 */
+
+	.debug 0			: { *(.debug) }
+	.line 0				: { *(.line) }
+
+	/* GNU DWARF 1 extensions */
+
+	.debug_srcinfo 0	: { *(.debug_srcinfo) }
+	.debug_sfnames 0	: { *(.debug_sfnames) }
+
+	/* DWARF 1.1 and DWARF 2 */
+
+	.debug_aranges 0 	: { *(.debug_aranges) }
+	.debug_pubnames 0	: { *(.debug_pubnames) }
+
+	/* DWARF 2 */
+
+	.debug_info 0		: { *(.debug_info) *(.gnu.linkonce.wi.*) }
+	.debug_abbrev 0		: { *(.debug_abbrev) }
+	.debug_line 0		: { *(.debug_line) }
+	.debug_frame 0		: { *(.debug_frame) }
+	.debug_str 0		: { *(.debug_str) }
+	.debug_loc 0		: { *(.debug_loc) }
+	.debug_macinfo 0	: { *(.debug_macinfo) }
+}
diff --git a/nuttx/configs/teensy/hello/setenv.sh b/nuttx/configs/teensy/hello/setenv.sh
new file mode 100755
index 000000000..35827ca17
--- /dev/null
+++ b/nuttx/configs/teensy/hello/setenv.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+# configs/teensy/hello/setenv.sh
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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="${PATH}"
+fi
+
+# This the Cygwin path to the location where I installed the WinAVR
+# toolchain under windows.  This is *not* the default install
+# location so you will probably have to edit this.  You will also have
+# to edit this if you install the Linux AVR toolchain as well
+#export TOOLCHAIN_BIN="/cygdrive/c/WinAVR/bin"
+
+# This the Cygwin path to the location where I build the buildroot
+# toolchain.
+export TOOLCHAIN_BIN="${WD}/../misc/buildroot/build_avr/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/teensy/include/board.h b/nuttx/configs/teensy/include/board.h
new file mode 100755
index 000000000..adc1a5fda
--- /dev/null
+++ b/nuttx/configs/teensy/include/board.h
@@ -0,0 +1,97 @@
+/****************************************************************************
+ * configs/teensy/include/board.h
+ * include/arch/board/board.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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_TEENSY_INCLUDE_BOARD_H
+#define __CONFIGS_TEENSY_INCLUDE_BOARD_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+/* Clocking *****************************************************************/
+
+#define BOARD_CPU_CLOCK        16000000 /* F_CPU = 16MHz */
+
+/* LED definitions **********************************************************/
+/* The Teensy++ 2.0 has a single on-board LEDs connected to PortD, Pin 6 */
+
+#define LED_STARTED            0
+#define LED_HEAPALLOCATE       1
+#define LED_IRQSENABLED        2
+#define LED_STACKCREATED       3
+#define LED_INIRQ              4
+#define LED_SIGNAL             5
+#define LED_ASSERTION          6
+#define LED_PANIC              7
+
+/* Button definitions *******************************************************/
+/* SW1 = Connects to AT90USBxx RESET pin and is not available to software */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_TEENSY_INCLUDE_BOARD_H */
diff --git a/nuttx/configs/teensy/src/Makefile b/nuttx/configs/teensy/src/Makefile
new file mode 100755
index 000000000..0178709b4
--- /dev/null
+++ b/nuttx/configs/teensy/src/Makefile
@@ -0,0 +1,97 @@
+############################################################################
+# configs/teensy/src/Makefile
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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 $(TOPDIR)/Make.defs
+
+ASRCS		= 
+CSRCS		= up_boot.c
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS		+= up_leds.c
+endif
+
+AOBJS		= $(ASRCS:.S=$(OBJEXT))
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+
+SRCS		= $(ASRCS) $(CSRCS)
+OBJS		= $(AOBJS) $(COBJS)
+
+ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
+ifeq ($(CONFIG_ARCH_AVR32),y)
+ARCH_SUBDIR	= avr32
+endif
+ifeq ($(CONFIG_ARCH_AVR),y)
+ARCH_SUBDIR	= avr
+endif
+
+ifeq ($(WINTOOL),y)
+  CFLAGS	+= -I "${shell cygpath -w $(TOPDIR)/sched}"
+  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" 
+  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" 
+  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
+else
+  CFLAGS	+= -I "$(TOPDIR)/sched"
+  CFLAGS	+= -I "$(ARCH_SRCDIR)/chip"
+  CFLAGS	+= -I "$(ARCH_SRCDIR)/common" 
+  CFLAGS	+= -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
+endif
+
+all: libboard$(LIBEXT)
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+libboard$(LIBEXT): $(OBJS)
+	@( for obj in $(OBJS) ; do \
+		$(call ARCHIVE, $@, $${obj}); \
+	done ; )
+
+.depend: Makefile $(SRCS)
+	@$(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	@rm -f libboard$(LIBEXT) *~ .*.swp
+	$(call CLEAN)
+
+distclean: clean
+	@rm -f Make.dep .depend
+
+-include Make.dep
diff --git a/nuttx/configs/teensy/src/teensy_internal.h b/nuttx/configs/teensy/src/teensy_internal.h
new file mode 100755
index 000000000..a0c67b07b
--- /dev/null
+++ b/nuttx/configs/teensy/src/teensy_internal.h
@@ -0,0 +1,101 @@
+/****************************************************************************

+ * configs/teensy/src/pcblogic-internal.h

+ *

+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+ *

+ * 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_TEENSY_SRC_TEENSY_INTERNAL_H

+#define __CONFIGS_TEENSY_SRC_TEENSY_INTERNAL_H

+

+/****************************************************************************

+ * Included Files

+ ****************************************************************************/

+

+#include <nuttx/config.h>

+

+/****************************************************************************

+ * Pre-Processor Definitions

+ ****************************************************************************/

+/* Configuration ************************************************************/

+

+/****************************************************************************

+ * Public Types

+ ****************************************************************************/

+

+#ifndef __ASSEMBLY__

+

+/****************************************************************************

+ * Inline Functions

+ ****************************************************************************/

+

+/****************************************************************************

+ * Public Function Prototypes

+ ****************************************************************************/

+

+#ifdef __cplusplus

+#define EXTERN extern "C"

+extern "C" {

+#else

+#define EXTERN extern

+#endif

+

+/************************************************************************************

+ * Name: at90usb_spiinitialize

+ *

+ * Description:

+ *   Called to configure SPI chip select GPIO pins for the Teensy++ 2.0 board.

+ *

+ ************************************************************************************/

+

+#if defined(CONFIG_AVR_SPI1) || defined(CONFIG_AVR_SPI2)

+EXTERN void weak_function at90usb_spiinitialize(void);

+#endif

+

+/************************************************************************************

+ * Name: at90usb_ledinit

+ *

+ * Description:

+ *   Configure on-board LEDs if LED support has been selected.

+ *

+ ************************************************************************************/

+

+#ifdef CONFIG_ARCH_LEDS

+EXTERN void at90usb_ledinit(void);

+#endif

+

+#undef EXTERN

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* __ASSEMBLY__ */

+#endif /* __CONFIGS_TEENSY_SRC_TEENSY_INTERNAL_H */

diff --git a/nuttx/configs/teensy/src/up_boot.c b/nuttx/configs/teensy/src/up_boot.c
new file mode 100755
index 000000000..18c65158a
--- /dev/null
+++ b/nuttx/configs/teensy/src/up_boot.c
@@ -0,0 +1,93 @@
+/************************************************************************************
+ * configs/teensy/src/up_boot.c
+ * arch/mips/src/board/up_boot.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <arch/board/board.h>
+
+#include "up_arch.h"
+#include "up_internal.h"
+
+#include "at90usb_internal.h"
+#include "teensy_internal.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: up_boardinitialize
+ *
+ * Description:
+ *   All AT90USB 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 up_boardinitialize(void)
+{
+  /* Configure SSP chip selects if 1) at least one SSP is enabled, and 2) the weak
+   * function at90usb_spiinitialize() has been brought into the link.
+   */
+
+#if defined(CONFIG_AVR_SPI1) || defined(CONFIG_AVR_SPI2)
+  if (at90usb_spiinitialize)
+    {
+      at90usb_spiinitialize();
+    }
+#endif
+
+  /* Configure on-board LEDs if LED support has been selected. */
+
+#ifdef CONFIG_ARCH_LEDS
+  at90usb_ledinit();
+#endif
+}