ChibiOS 2.6.8, until I can figure out where to get it from git.

firmware/chibios/ext/ext.dox

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+/*
+    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+                 2011,2012,2013 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+                                      ---
+
+    A special exception to the GPL can be applied should you wish to distribute
+    a combined work that includes ChibiOS/RT, without being obliged to provide
+    the source code for any proprietary components. See the file exception.txt
+    for full details of how and when the exception can be applied.
+*/
+
+/**
+ * @defgroup external External Components
+ * ChibiOS/RT supports several external libraries through support interfaces
+ * and/or demos. Credit should be given to the original authors for making
+ * available such useful code.<br>
+ * The current list of supported component is:
+ * - <b>uIP</b>, by Adam Dunkels at the Swedish Institute of Computer Science,
+ *   <a href="http://www.sics.se/~adam/uip/index.php/Main_Page"
+ *      target="_blank">link</a>.
+ * - <b>lwIP</b>, many authors,
+ *   <a href="http://savannah.nongnu.org/projects/lwip/"
+ *   target="_blank">link</a>.
+ * - <b>FatFs</b>, by "ChaN",
+ *   <a href="http://elm-chan.org"
+ *   target="_blank">link</a>.
+ * .
+ * External components and libraries are not directly supported and are used
+ * "as is" or with minor integration patching.
+ */

firmware/chibios/ext/readme.txt

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+*****************************************************************************
+** External Libraries.                                                     **
+*****************************************************************************
+
+The libraries under this directory are not part of ChibiOS/RT but are used by
+some of the demo applications.
+Please note that each item is covered by its own license, please read the
+instructions contained in the various distributions.
+
+The currently included items are:
+
+1. uip-1.0, a minimal TCP/IP implementation: http://www.sics.se/~adam/uip/
+2. lwip-1.4.0, lightweight TCP/IP stack: http://savannah.nongnu.org/projects/lwip/
+3. FatFS 0.9 (patched), the original version is available from
+   http://elm-chan.org/fsw/ff/00index_e.html
+
+The above files are included packed as downloaded from the original repository
+and without any modification, in order to use the libraries unpack them
+under ./ext as:
+
+./ext/uip-1.0
+./ext/lwip
+./ext/fatfs
+./ext/stm32lib (you also need to copy stm32f10x_conf.h in your project)
+
+Some patches are also present:
+
+1. uip-1.0 patches, small fixes to the uIP required to make it work with
+   ChibiOS/RT, unpack the archive over the uIP distribution and replace the
+   files.