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

firmware/chibios/demos/ARMCM4-STM32F407-LWIP-FATFS-USB/readme.txt

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+*****************************************************************************
+** ChibiOS/RT port for ARM-Cortex-M4 STM32F407.                            **
+*****************************************************************************
+
+** TARGET **
+
+The demo runs on an Olimex STM32-E407 board.
+
+** The Demo **
+
+The demo currently just flashes a LED using a thread and serves HTTP requests
+at address 192.168.1.20 on port 80.
+FatFs integrated using SDIO.
+The USB-FS port is used as USB-CDC and a command shell is ready to accepts
+commands there.
+
+** Build Procedure **
+
+The demo has been tested by using the free Codesourcery GCC-based toolchain
+and YAGARTO.
+Just modify the TRGT line in the makefile in order to use different GCC ports.
+
+** Notes **
+
+Some files used by the demo are not part of ChibiOS/RT but are copyright of
+ST Microelectronics and are licensed under a different license.
+Also note that not all the files present in the ST library are distributed
+with ChibiOS/RT, you can find the whole library on the ST web site:
+
+                             http://www.st.com