Prep for release 6.20nuttx-6.20

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4937 42af7a65-404d-4744-a932-0658087f49c3

5 files changed, 265 insertions, 208 deletions

diff --git a/apps/ChangeLog.txt b/apps/ChangeLog.txt
index f2578c473..f00020bcd 100755
--- a/apps/ChangeLog.txt
+++ b/apps/ChangeLog.txt
@@ -241,10 +241,12 @@
 	  capability when a USB console is used.
 	* apps/nshlib/nsh_fscmds.c:  Add the 'mv' command
 
-6.20 2012-xx-xx Gregory Nutt <gnutt@nuttx.org>
+6.20 2012-07-12 Gregory Nutt <gnutt@nuttx.org>
 
 	* namedapp/exec_namedapp.c - Correct an error when round robin scheduling
 	  is enabled.  The priority of the new, named application was erroneously
 	  being set to the priority of the parent thread; losing its configured
 	  priority.  Reported by Mike Smith.
 
+6.21 2012-xx-xx Gregory Nutt <gnutt@nuttx.org>
+
diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 36a5e2f9a..1ed429e90 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -2903,7 +2903,7 @@
 	* drivers/usbdev/pl2303.c:  Fix a cut'n'paste error that snuck into
 	  the PL2303 emulation driver several months back.
 
-6.20 2012-xx-xx Gregory Nutt <gnutt@nuttx.org>
+6.20 2012-07-12 Gregory Nutt <gnutt@nuttx.org>
 
 	* configs/stm3210e-eval/src and arch/arm/src/stm32/: Add beginnings of
 	  power management support for the STM32 and the STM3210E-EVAL board, in
@@ -2977,3 +2977,5 @@
 	* configs/lpc4330-xplorer/nsh:  Add an NSH configuration for the LPC4330
 	  Xplorer board.
 
+6.21 2012-xx-xx Gregory Nutt <gnutt@nuttx.org>
+
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index c20bbe9f6..d51ad251a 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: July 6, 2012</p>
+      <p>Last Updated: July 12, 2012</p>
     </td>
   </tr>
 </table>
@@ -968,70 +968,63 @@
   </tr>
 </table>
 
-<h2>NuttX-6.19 Release Notes</h2>
+<h2>NuttX-6.20 Release Notes</h2>
 <p>
-  The 86<sup>th</sup> release of NuttX, Version 6.19, was made on June 15, 2012, and is available for download from the
+  The 87<sup>th</sup> release of NuttX, Version 6.20, was made on July 12, 2012, and is available for download from the
   <a href="http://sourceforge.net/projects/nuttx/files/">SourceForge</a> website.
-  Note that the release consists of two tarballs:  <code>nuttx-6.19.tar.gz</code> and <code>apps-6.19.tar.gz</code>.
+  Note that the release consists of two tarballs:  <code>nuttx-6.20.tar.gz</code> and <code>apps-6.20.tar.gz</code>.
   Both may be needed (see the top-level <code>nuttx/README.txt</code> file for build information)
   The change log associated with the release is available <a href="#currentrelease">here</a>.
   Unreleased changes after this release are available in SVN.
   These unreleased changes are also listed <a href="#pendingchanges">here</a>.
 </p>
-<p><b>NFS client</b>.
-  This release features new support for a Network File System (NFS) client.
-  This feature allows a tiny, embedded MCU to mount a remote file system exported by an NFS server and then to access the file system as it would any local file system.
-  Then the tiny MCU can effectively have terabyte of storage!
-</p>
-<p>
-  This might be useful for data collection, for MCU configuration information, for software updates, for providing modular, loadable code modes, controlling a &quot;farm&quot; of MCUs ... there are many possibilities and opportunities for innovation!
-</p>
-<p>
-  The NuttShell (NSH) now supports the following command:
-</p>
-<ul><pre>
-nfsmount &lt;server-address&gt; &lt;mount-point&gt; &lt;remote-path&gt;
-</pre></ul>
 <p>
-  That command will mount the remote NFS server directory &lt;remote-path&gt; at &lt;mount-point&gt; on the target machine.
-  &lt;server-address&gt; is the IP address of the remote server.
+  This release corresponds with SVN release number: r4937
 </p>
 <p>
-  The NFS development was the graduation project of Jose Pablo Rojas V. who is a student at the <i>Instituto Tecnológico de Costa Rica</i> (ITCR, or TEC).
-  A lot of effort went into understanding what a tiny, embedded NFS client should do and getting the target resource usage to a bare minimum.
-  Only around a kilobyte or so of memory is required to run the NFS client (and most of that for I/O buffers).
-  Jose Pablo has spent several months living with NFS and should be congratulated for his success.
+  <b>Additional new features and extended functionality</b>
 </p>
-<p>
-<p>
-<p><b>Additional new features and extended functionality</b>.</p>
 <ul>
-  <li><b>Drivers</b>:
-    SSD1289 LCD driver, MIO283QT2 LCD driver
+  <li><b>Power Management</b>
+    <p>
+      An evolving power management example is being created by Diego Sanchez.
+      This effort currently involves on the STM32 F1 but clearly demonstrates the NuttX power management system which will automatically drive the system to lower power usage states due to lack of use.
   </li>
-
-  <li><b>LM3S</b>:
-    Additional register definition header files (contributed by Max Neklyudov).
+  <li><b>Drivers</b>
+    <p>
+      Added a driver for the SST 25 SPI-based FLASH parts.
   </li>
-
-  <li><b>STM32 Boards</b>:
-    The STM32F4Discovery will now support an SSD1289 LCD, STM3220G-EVAL
-    board support is now equivalent to the STM3240G-EVAL board support.
+  <li><b>PIC32</b>
+    <p>
+      Added support for the PIC32MX1 and PIC32MX2 families.
+      Added support for the microchipOpen and Pinguino toolchains.
   </li>
-
-  <li><b>PIC32 Boards</b>:
-    The Mikroelektronika PIC32MX7 MMB board port is now functional, very complete, and stable.
+  <li><b>NXP LPC43XX</b>
+    <p>
+      Added support for the entire LPC43xx family
   </li>
-
-  <li><b>Graphics</b>:
-    The NxConsole will now take keyboard input from the NX graphics subsystem.
-    This means that if there are multiple NxConsole windows, only the top instance that has focus will receive the keyboard input.
+  <li><b>PIC32 boards</b>
+    <p>
+      Added support for the DTX1-4000L &quot;Mirtoo&quot; module/
+      See the <a href="http://www.dimitech.com/">Dimitech</a> website for further information.
+      (PIC32MX2).
   </li>
-
-  <li><b>apps/</b>: 
-    Add the capability to use an arbitrary USB device as the console (not necessarily <code>/dev/console</code>).
-    Additional enhancements for USB consoles.
-    Added the <code>mv</code> command.
+  <li><b>NXP LPC43XX Boards</b>
+    <p>
+      Added support for <a href="http://www.ngxtech.com/">NGX Technologies</a> LPC4330-Xplorer board.
+  </li>
+  <li><b>NXP LPC17XX Boards</b>
+    <p>
+      Added support for <a href="http://www.micromint.com/">Micromint</a> Lincoln60 board (LPC1769).
+  </li>
+  <li><b>LM3S Boards</b>
+    <p>
+      Add a configuration to support the TI/Stellaris EKK-LM3S3B96 development board.
+      Contributed by Jose Pablo Rojas V.
+  </li>
+  <li><b>Library</b>
+    <p>
+      NuttX now supports platform-specific stdarg.h header files.
   </li>
 </ul>
 
@@ -1040,29 +1033,41 @@ nfsmount &lt;server-address&gt; &lt;mount-point&gt; &lt;remote-path&gt;
 </p>
 
 <ul>
-  <li><b>Automated Configuration</b>.
-    Automated configuration based on the <code>kconfig-frontends</code> tool is being incorporated into the build system.
-    The configuration is still not complete enough for general use in this release.
+  <li><b>Automated Configuration</b>
+    <p>
+      Automated configuration based on the <code>kconfig-frontends</code> tool is being incorporated into the build system.
+      The configuration is still not complete enough for general use in this release.
+    </p>
   </li>
-  <li><b>STM32 Drivers</b>.
-    Added files that will (eventually) hold an STM32 OTG FS host driver.  This is still a work in progress.
+  <li><b>STM32 Drivers</b>
+    <p>
+      Added files that will (eventually) hold an STM32 OTG FS host driver.  This is still a work in progress.
+    </p>
   </li>
 </ul>
 
 <p><b>Bugfixes</b> (see the change log for details):</p>
 <ul>
-  <li><b>General</b>:
-     <code>sleep()</code> and  <code>usleep()</code> return values,
-      <code>sig_timedwait()</code> errno setting  on timeout.
+  <li><b>PIC32</b>
+    <p>
+      GPIO output configuration (critical bug)
+    </p>
   </li>
-  <li><b>Drivers</b>:
-    STMPE811 touchscreen driver, USB PLC2303, USB CDC/ACM
+  <li><b>STM32</b>
+    <p>
+      Typos in pin mapping files.
+    </p>
   </li>
-  <li><b>STM32</b>:
-    Several USB device controller driver fixes, F4 interrrupt priorities  (contributed by Mike Smith).
+  <li><b>LM3S</b>
+    <p>
+      Fixed an optimization related but that caused slow start-up times if optimization was disabled.
+    </p>
   </li>
-  <li><b>Graphics</b>:
-    Keyboard input, fill trapezoid bug
+  <li><b>Library</b>
+    <p>
+      Fixed signed extension but in all <code>limit.h</code> files(reported by Lorenz Meier).
+      Fixed inet_ntoa compilation failure on with SDCC.
+    </p>
   </li>
 </ul>
 <p>
@@ -1929,9 +1934,31 @@ nfsmount &lt;server-address&gt; &lt;mount-point&gt; &lt;remote-path&gt;
     <ul>
       <p>
         <b>STATUS:</b>
-        This port is in progress.
-        It is nearly code-complete and almost ready to begin test.
-        I hope to have the basic port to this board complete and available in the NuttX-6.20 release.
+        The basic port is complete.
+        The OS test configuration and the basic NSH configurations are present and fully verified.
+        This includes verified support for:  SYSTICK system time,  pin and GPIO configuration, and a serial console.
+      </p>
+      <p>
+        Several drivers have been coped from the related LPC17xx port but require integration into the LPC43xx:  ADC, DAC, GPDMA, I2C, SPI, and SSP.
+        The registers for these blocks are the same in both the LPC43xx and the LPC17xx and they should integrate into the LPC43xx very easily by simply adapting the clocking and pin configuration logic.
+      </p>
+      <p>
+        Other LPC17xx drivers were not brought into the LPC43xx port because these peripherals have been completely redesigned:  CAN, Ethernet, USB device, and USB host.
+      </p>
+      <p>
+        So then there is no support for the following LPC43xx peripherals: SD/MMC, EMC, USB0,USB1, Ethernet, LCD, SCT, Timers 0-3, MCPWM, QEI, Alarm timer, WWDT, RTC, Event monitor, and CAN.
+      </p>
+      <p>
+        Some of these can be leveraged from other MCUs that appear to support the same peripheral IP:
+        <ul>
+          <li>
+            USB0 appears to be the same as the USB OTG peripheral for the LPC31xx.
+            It should be possible to drop in the LPC31xx driver with a small porting effort.
+          </li>
+          <li>
+            The Ethernet block looks to be based on the same IP as the STM32 Ethernet and, as a result, it should be possible to leverage the NuttX STM32 Ethernet driver with a little more effort.
+          </li>
+        </ul>
       </p>
     </ul>
   </td>
@@ -1948,6 +1975,7 @@ nfsmount &lt;server-address&gt; &lt;mount-point&gt; &lt;remote-path&gt;
     1) Linux with native Linux GNU toolchain, 2) Cygwin with Cygwin GNU Cortex-M3 or 4toolchain, or 3) Cygwin with Windows native GNU Cortex-M3 or M4 toolchain (CodeSourcery or devkitARM).  A DIY toolchain for Linux or Cygwin is provided by the NuttX
     <a href="http://sourceforge.net/projects/nuttx/files/buildroot/">buildroot</a> package.
     I use FreeScale's <i>CodeWarrior</i> IDE only to work with the JTAG debugger built into the Kinetis boards.
+    I use the <i>Code Red</i> IDE with the some of the NXP parts and the <i>Atollic</i> toolchain with some of the STMicroelectronics parts.
   </p>
   </td>
 </tr>
@@ -2249,10 +2277,11 @@ nfsmount &lt;server-address&gt; &lt;mount-point&gt; &lt;remote-path&gt;
     <ul>
       <p>
         <b>STATUS:</b>
-        The basic port is code complete but development is ongoing and many features have not yet been verified.
+        The basic port is code complete.
         Two configurations are available:
         An OS test configuration and a that support the NuttShell (NSH).
         The OS test configuration is fully functional and proves that we have a basically healthy NuttX port to the Mirtoo.
+        This includes support for the SST25 serial FLASH on board the module.
         See the <a href="http://www.nuttx.org/NuttShell.html">NSH User Guide</a> for further information about NSH.
         There are some remaining issues to be resolved with the NSH configuration but, with any luck, the verified port should be available with the NuttX 6.20 release.
       </p>
@@ -2950,140 +2979,86 @@ Other memory:
 </table>
 
 <ul><pre>
-nuttx-6.19 2012-06-15 Gregory Nutt &lt;gnutt@nuttx.org&gt;
-
-    * graphics/nxconsole/nxcon_kbdin.c:  If selected, the NxConsole will take
-      input from the NX keyboard input callback.  If this option is set, then
-      the interface nxcon_kdbin() is enabled.  That interface may be driven by
-      window callback functions so that keyboard input *only* goes to the top
-      window. If CONFIG_NXCONSOLE_NXKBDIN is not selected, then the NxConsole
-      will receive its input from stdin (/dev/console).  This works great but
-      cannot be shared between different windows.  Chaos will ensue if you
-      try to support multiple NxConsole windows without CONFIG_NXCONSOLE_NXKBDIN
-    * graphics/nxmu/nx_kbdin.c:  Fix pointer argument.  This is a error
-      introduced in changes leading up to the 6.18 release.  This error will
-      cause crashes or perhaps simply not work when you try to handle window
-      keyboard data in multi-user mode.
-    * graphics/nxconsole/nxcon_kdbind.c:  Fixed unmatched sem_wait and sem_post.
-      Fix some conditional compilation that included a few too many lines of code.
-    * drivers/input/stmpe811_tsc.c and stmpe811.h:  Add a timeout to catch missed
-      pen up events.  Now the STM3240G-EVAL touchscreen works very smoothly.
-    * configs/stm3240g-eval/nxwm/defconfig: Enable support for NxConsole keyboard
-      input. Increasing spacing of icons.
-    * configs/stm3240g-eval/nxwm/defconfig: Use a larger font for the calculator.
-    * include/nuttx/lcd/ssd1289.h, drivers/lcd/ssd1289.c and .h:  Generic LCD
-      driver for LCDs based on the Solomon Systech SSD1289 LCD driver.  This
-      of this as a template for an LCD driver that will have to be cusomized
-      for your particular LCD hardware.
-    * configs/stm32f4discovery/src/up_extmem.c and up_ssd1289.c:  Add support to
-      STM32F4Discovery for than an external, SSD1289-based LCD.
-    * configs/stm32f4discovery/nxlines:  Add an STM32F4Discovery configuration
-      to thest the SSD1289-based LCD.
-    * configs/stm3240g-eval/src: Add USB GPIO initialization logic needed
-      in board-specific boot logic.
-    * configs/stm32f4discovery/src: Add USB GPIO initialization logic needed
-      in board-specific boot logic.
-    * drivers/usbdev/pl2303.c and cdcacm.c:  Fix the request size used for sending
-      packets.  It was not using the maximum request size, but instead the previous
-      request size.  As a result, packets get smaller, and smaller, and ...  This
-      is an important USB serial fix.
-    * arch/arc/src/stm32_otgfsdev.c: Bug fix: Don't process TXFE if we have
-      already processed an XFRC interrupt.  We have already done what needs
-      to done in that case.
-    * arch/arc/src/stm32_otgfsdev.c:  Fixed some status settings in queuing of write
-      messages. Added a &quot;hack&quot; to work around missing TxFIFO empty interrupts.  The
-      hack is basically to poll for space in the TxFIFO instead of of setting up
-      the interrupt.
-    * arch/arm/src/stm32/stm32f2* and chip/stm32f2*:  Update all STM32 F2 file so
-      that they are equivalent to F4 files.  This is kind of a maintenance nightmare.
-    * configs/stm3220g-eval/: Update existing configurations to the same level
-      as the corresponding STM3240G-EVAL configurations.  This adds FSMC SRAM,
-      touchscreen, and LCD support.
-    * configs/stm3220g-eval/: Add a NxWM configuration for the STM3220G-EVAL.
-    * stmpe11*: Fix a massive naming problem.  All references to STMPE11 should be
-      STMPE812.
-    * arch/arm/src/stm32/stm32_otgfsdev.c: Need to enabled USB reset interrupt
-      (contributed by Erik Van Der Zalm).
-    * sched/sleep.c:  Fix the return value from sleep().  The correct behavior is
-      to return the number of unwaited seconds; the implementation was always
-      returning zero.
-    * sched/usleep.c and include/unistd.h:  Was a void function, but should return
-      0 on success.  usleep() needs to check the return value from sigtimedwait().
-      sigtimewait() returns the signal number that awakened it and an error (EAGAIN)
-      if the timeout expired (normal case).
-    * sched/sig_timedwait.c:  Fix sigtimedwait() return value.  On a timeout, it was
-      setting the 8-bit si_signo field to -1 and eded up reported successfully awakened
-      by signal 255!  Now detects the timeout and errors -1 with errno == EGAIN.  If
-      sigtimedwait() is awakened by an unblocked signal, but it is not one of the
-      signals in the waited-for set, it will return -1 with errno == EINTR.
-    * arch/arm/src/stm32_i2c.c:  Fix STM32 F2 I2C.  It is apparently bug-for-bug
-      compatible with the F4 and needs the same work-around for the missing BTF
-      signal that was needed for the F4.
-    * drivers/lcd/ssd1289.*:  Fix some of the initial register settings.
-    * configs/stm32f4discovery/src/up_ssd1289.c: FSMC address bit 16 is used to
-      distinguish command and data.  But FSMC address bits 0-24 correspond to ARM
-      address bits 1-25, se we need to set bit 17 in order generate output on
-      FSMC_A16.
-    * arch/arm/src/lm3s/lm3s_epi.h and lm3s_timer.h:  LM3S header files
-      (contributed by Max Neklyudov).
-    * arch/arm/src/stm32/stm32_irq.c:  Some of the interrupt priorities were
-      not be initialized (F2 and F4 only).  Thus, the very high numbered
-      interrupts (like UART6) and cause nested interrupts.  This leads to
-      some very difficult to debug crashes.  Fix contributed by Mike Smith.
-    * arch/mips/src/pic32/pic32_head.S and pic32_config.h and
-      configs/pic32mx7mmb/include/board.h:  Extended PIC32 device configuration
-      capabilities and change board.h to support unique clocking requirements
-      of the Mikroelektronika PIC32MX7 MMB.  That board now works!
-    * configs/pic32mx7mmb/nsh:  Added and verify a NuttShell configuration
-      for the Mikroelektronika PIC32MX7 MMB board.
-    * arch/mips/pic32/pic32mx-ethernet.c:  Fix logic that guesses PHY address;
-      the search loop missed the PHY address needed by the Mikroelektronika
-      PIC32MX7 MMB board.
-    * configs/pic32mx7mmb/nsh:  Configuration now supports a network by default.
-    * configs/pic32mx7mmb/src:  Add support for the MMC/SD slot on board
-      the Mikroelektronika PIC32MX7 MMB board (not working on initial check-in).
-    * arch/mips/src/pic32/pic32mx-spi.c:  Add support for very low-level,
-      register access debug output.
-    * configs//pic32mx7mmb/include/board.h:  Reduced peripheral clock to
-      4MHz to match other PIC32 configurations.
-    * configs/pic32mx7mmb/src/up_nsh.c:  SD card needs to operate in SPI
-      mode 2.
-    * configs/pic32mx7mmb/nsh/defconfig:  MMC/SD card support is now
-      enabled by default in the PIC32MX7 MMB board configuration.
-    * configs/pic32mx7mmb/nsh/defconfig:  Verified the USB Mass Storage
-      Class (MSC) using MMC/SD card as the logical unit.  Updated the default
-      PIC32MX7 MMB board configuration so that USB and the mass storage class
-      are enabled by default.
-    * drivers/lcd/mio283qt2.c and include/nuttx/lcd/mio283qt2.h:  Add generic
-      support for the MIO283QT2 LCD.
-    * configs/pic32mx7mmb/src/up_mio283qt2.c:  Add support for the MIO283QT2
-      LCD on the PIC32MX7 MMB board.
-    * configs/pic32mx7mmb/src/up_touchscreen.c:  Add an ADC-based touchscreen
-      driver for the PIC32MX7 MMB board.  Kind of works, but needs more
-      verification and tuning.
-    * arch/mips/src/common/up_idle.c:  Strange but important fix.  For some still-
-      unknown reason, interrupts are left in an unhealthy state in the IDLE
-      when the work queue is enabled.  This is partially because some interrupt
-      related logic is not built in that case.  Simply disabling then re-
-      enabling interrupts restores the proper state.
-    * graphics/nxglib/lcd/nxglib_filltrapezoid.c and fb/nxglib_filltrapezoid.c:
-      Fix an error when the trapezoid is only 1 line high.  In this case, a
-      divide by zero error would occur.  The fix is to draw the 1 line high
-      trapezoid as a run.
-    * drivers/usbdev/pl2303.c:  Fixe a cut'n'paste error that snuck into
-      the PL2303 emulation driver several months back.
-
-apps-6.19 2012-06-15 Gregory Nutt &lt;gnutt@nuttx.org&gt;
-
-    * apps/nshlib/nsh_usbdev.c:  Add the capability to use an arbitrary USB
-      device as the console (not necessarily /dev/console).  This is a useful
-      option because then you can still use the serial console to debug with.
-    * apps/nshlib/nsh_usbdev.c:  User now has to press ENTER 3 times before
-      USB console will start.  Otherwise, the USB console starts before there
-      is anyone at the other end to listen.
-    * apps/nshlib/nsh_usbdev.c and nsh_consolemain.c:  Add support for the USB
-      capability when a USB console is used.
-    * apps/nshlib/nsh_fscmds.c:  Add the 'mv' command
+nuttx-6.20 2012-07-12 Gregory Nutt &lt;gnutt@nuttx.org&gt;
+
+    * configs/stm3210e-eval/src and arch/arm/src/stm32/: Add beginnings of
+      power management support for the STM32 and the STM3210E-EVAL board, in
+      particular.
+    * Documentation/NfsHowTo.html:  Add a How-To document for the new NFS
+      client feature.
+    * arch/mips/include/pic32mx and arch/mips/src/pic32mx:  Add support for the
+      PIC32MX1 and PIC32MX2 families.
+    * configs/mirtoo:  Add a board configuration to support the DTX1-4000L
+      &quot;Mirtoo&quot; module from http://www.dimitech.com/
+    * tools/pic32mx:  All of the duplicate directories containing the same
+      same PIC32 tools were move to this single location.
+    * configs/mirtoo:  The basic Mirtoo port is now functional.
+    * configs/mirtoo/ostest:  Added support for the microchipOpen toolchain
+      (see http://sourceforge.net/projects/microchipopen/).
+    * configs/mirtoo/nsh:  Added a NuttShell (NSH) configuration for
+      the Mirtoo module.
+    * configs/mirtoo/scripts:  Move all Mirtoo linker scripts to a common
+      directory.
+    * arch/mips/src/pic32mx/pic32mx-gpio.c:  All digital inputs were being
+      configured as outputs.  This is a *critical* bug fix and needs to be
+      incorporated by any PIC32 users.
+    * drivers/mtd/sst25.c:  Added a driver for the SST 25 SPI-based FLASH
+      parts.
+    * configs/mirtoo/src/up_nsh.c:  The Mirtoo NSH configuration can now
+      mount the SST 25 devices so that it can be used for a FAT file system.
+      There are are, however, some NSH memory usage issues if this configuration
+      enabled now.  Some tuning is still needed.
+    * configs/mirtoo/nxffs:  Add an alternative NSH configure for the Mirtoo
+      module for testing the on-module SST 25 chip using the NXFFS file system.
+    * arch/arm/src/lpc43xx and arch/arm/include/lpc43xx:  The NXP LPC43xx port
+      is slowly evolving in these directories.
+    * configs/stm3210e-eval/pm:  Add a new configuration for testing STM32 power
+      management.
+    * configs/stm3210e-eval/scripts:  Moved all of the duplicate ST3210-EVAL 
+      linker scripts into one set of linker scripts at this location.
+    * configs/stm3210e-eval/src/up_buttons.c, up_lcd.c, and up_pm.c:  New logic
+      for testing STM32 power management.
+    * configs/lincoln60:  Add a configuration to support the Micromint Lincoln60
+      board.
+    * configs/ekk-lm3s3b96:  Add a configuration to support the TI/Stellaris
+      EKK-LM3S3B96 development board.  Contributed by Jose Pablo Rojas V.
+    * arch/arm/src/lpc43xx/chip:  Created header files for *all* (really)
+      lpc43xx registers and all bit-fields.
+    * configs/lpc4330-xplorer:  Added a configuration for the NXP LPC43XX
+      Xplorer board.  This is just to facilitate testing of the LPC43xx
+      port but will, with any luck, become proper board support for that
+      board.
+    * arch/arm/src/lm3s/lm3s_syscontrol.c:  Fix an optimization related problem
+      by adding a volatile qualifier to a timing loop.  Oddly, the consequence
+      of the bug is that when debug was off, the LM3S platform too a long time
+      to boot.  It now boots rapidly whether debug is on or off.
+    * arch/*/include/limits.h:  Change all values in all limits.h for all
+      architectures to signed decimal; the hex values were not sign extending
+      appropriate in most uses (reported by Lorenz Meier).
+    * arch/arm/src/stm32/chip/stm32f103/7vc_pinmap:  Fix typographical error in
+      two pinmap definition files.
+    * lib/net/lib_inetntoa.c:  Fix typographical error that cause compilation
+      failure on platforms that do not support passing of structures as
+      parameters.
+    * arch/arm/*/lpc43xx and configs/lpc4330-xplorer and code complete and
+      ready for testing.  Hopefully, verified LPC43xx support will appear
+      in NuttX-6.20.
+    * include/nuttx/stdarg.h:  If CONFIG_ARCH_STDARG_H=y is defined, the top-level
+      makefile will copy the generic (GCC-only) stdarg.h header file from
+      include/nuttx/stdarg.h to include/stdarg.h.  So for the architectures
+      that cannot use their GCC toolchain's stdarg.h file, they can use this
+      alternative by defining CONFIG_ARCH_STDARG_H=y.  If CONFIG_ARCH_STDARG_H,
+      is not defined, then the redirecting stdarg.h header file will stay
+      out-of-the-way in include/nuttx/.
+    * configs/lpc4330-xplorer/nsh:  Add an NSH configuration for the LPC4330
+      Xplorer board.
+
+apps-6.19 2012-07-12 Gregory Nutt &lt;gnutt@nuttx.org&gt;
+
+    * namedapp/exec_namedapp.c - Correct an error when round robin scheduling
+      is enabled.  The priority of the new, named application was erroneously
+      being set to the priority of the parent thread; losing its configured
+      priority.  Reported by Mike Smith.
 
 NxWidgets-1.2 2012-06-15 Gregory Nutt &lt;gnutt@nuttx.org&gt;
 
diff --git a/nuttx/ReleaseNotes b/nuttx/ReleaseNotes
index 755b4520b..8c6ae0ccb 100644
--- a/nuttx/ReleaseNotes
+++ b/nuttx/ReleaseNotes
@@ -2897,7 +2897,7 @@ Additional new features and extended functionality:
 
     * Drivers:  SSD1289 LCD driver, MIO283QT2 LCD driver
 
-    * LM3S: Additiona; register definition header files (contributed by Max
+    * LM3S: Additional register definition header files (contributed by Max
       Neklyudov).
 
     * STM32 Boards:  The STM32F4Discovery will now support an SSD1289 LCD,
@@ -2936,3 +2936,66 @@ Bugfixes (see the change log for details) :
     * Graphics: Keyboard input, fill trapezoid bug
 
 As well as other, less critical bugs (see the ChangeLog for details)
+
+NuttX-6.20
+^^^^^^^^^^
+
+The 87th release of NuttX, Version 6.20, was made on July 12, 2012,
+and is available for download from the SourceForge website.  Note
+that release consists of two tarballs:  nuttx-6.20.tar.gz and
+apps-6.20.tar.gz.  Both may be needed (see the top-level nuttx/README.txt
+file for build information).
+
+This release corresponds with SVN release number: r4937
+
+Additional new features and extended functionality:
+
+    * Power Management:  An evolving power management example is being
+      created by Diego Sanchez.  This effort currently involves on the 
+      STM32 F1 but clearly demonstrates the NuttX power management
+      system which will automatically drive the system to lower power
+      usage states due to lack of use.
+
+    * Drivers:  Added a driver for the SST 25 SPI-based FLASH parts.
+
+    * PIC32:  Added support for the PIC32MX1 and PIC32MX2 families.
+      Added support for the microchipOpen and Pinguino toolchains.
+
+    * NXP LPC43XX: Added support for the entire LPC43xx family
+
+    * PIC32 boards:  Added support for the DTX1-4000L "Mirtoo" module
+      from http://www.dimitech.com/ (PIC32MX2).
+
+    * NXP LPC43XX Boards: Added support for NGX LPC4330-Xplorer board.
+
+    * NXP LPC17XX Boards: Added support for Micromint Lincoln60 board
+      (LPC1769).
+
+    * LM3S Boards:  Add a configuration to support the TI/Stellaris
+      EKK-LM3S3B96 development board.  Contributed by Jose Pablo Rojas V.
+
+    * Library:  NuttX now supports platform-specific stdarg.h header
+      files.
+
+Work in progress.  This release includes some partially completed
+work that is still not ready for prime time.
+
+    * Automated Configuration. Automated configuration based on the
+      kconfig-frontends tool is being incorporated into the build
+      system.  The configuration is still not complete enough for
+      general use in this release.
+
+    * STM32 Drivers. Added files that will (eventually) hold an STM32
+      OTG FS host driver.  This is still a work in progress.
+
+Bugfixes (see the change log for details) :
+
+    * PIC32: GPIO output configuration (critical bug)
+    * STM32: Typos in pin mapping files.
+    * LM3S:  Fixed an optimization related but that caused slow start-up
+      times if optimization was disabled.
+    * Library:  Fixed signed extension but in all limit.h files
+      (reported by Lorenz Meier).  inet_ntoa compilation failure
+      on Z80.
+
+As well as other, less critical bugs (see the ChangeLog for details)
diff --git a/nuttx/configs/lpc4330-xplorer/README.txt b/nuttx/configs/lpc4330-xplorer/README.txt
index 2f54965e1..b0385592d 100644
--- a/nuttx/configs/lpc4330-xplorer/README.txt
+++ b/nuttx/configs/lpc4330-xplorer/README.txt
@@ -54,9 +54,9 @@ Status
 
   This is the current status of the LPC43xx port:
 
-  - The basic OS test configuration is fully coded a ready for test.
-    This includes:  SYSTICK system time, pin and GPIO configuration,
-    basic UART support.
+  - The basic OS test configuration and the basic NSH configurations
+    are present and fully verified.  This includes:  SYSTICK system time,
+    pin and GPIO configuration, and serial console support.
 
   - The following drivers have been copied from the LPC17xx port, but
     require integration into the LPC43xx.  This integration should
@@ -76,7 +76,7 @@ Status
     - lpc43_ssp.c
 
     These LPC17xx drivers were not brought into the LPC43xx port because
-    it appears the the peripherals have been completely redesigned:
+    it appears the these peripherals have been completely redesigned:
 
     - CAN,
     - Ethernet,
@@ -354,7 +354,17 @@ Code Red IDE
     $ ddd --debugger arm-none-eabi-gdb nuttx &
 
   NOTE 1:  Don't forget to put the LPCLink in boot mode as described above
-  before starting GDB.
+  before starting GDB.  So a typical session might look like this:
+
+    $ lpc43xx
+    Booting LPC-Link with LPCXpressoWIN.enc
+    Press any key to continue . . . 
+
+    $ arm-none-eabi-gdb nuttx
+    (gdb) target extended-remote | crt_emu_lpc18_43_nxp -2 -pLPC4330 -wire=winusb
+    (gdb) load
+    (gdb) r
+    (gdb) c
 
   NOTE 2:  Don't forget to enable CONFIG_DEBUG_SYMBOLS=y in your NuttX
   configuration file when you build NuttX.  That option is necessary to build
@@ -366,6 +376,11 @@ Code Red IDE
   use CONFIG_DEBUG=y to mean that a debugger is attached and will deal
   with certain resets and debug controls appropriately.
 
+  So you should have:
+
+    CONFIG_DEBUG=y
+    CONFIG_DEBUG_SYMBOLS=y
+
   Troubleshooting.  This page provides some troubleshooting information that
   you can use to verify that the LPCLink is working correctly: