This repo is for firmware, OS, and application code for the STM32F4xx series of microcontrollers used on the PSAS AV3 avionics system.

To initialize the ChibiOS submodule run:

$ git submodule update --init

When ChibiOS updates you'll need to re-sync it as its origin has changed: The last time ChibiOS was updated: December 2013

$ git submodule sync
$ git submodule update

• projects
  • projects go here.
  • projects used on the rocket are prefixed by flight-[a-zA-z]
  • intro projects or tool chain test projects
    • e407-led
    • enet-udp (network test)
    • ??? e407-serial
• common
  • code that tends to be reused in projects. At the top level it has makefiles and is further grouped into
  • boards
    • boardfiles for our own custom boards. Most off the shelf board boardfiles can be found in ChibiOS/boards
  • devices
    • for peripheral drivers
  • net
    • network ports and addresses (IPs)
    • this is common across the RocketNet
      • maintained outside of the stm32 repo
  • util
    • general programming utilities
    • other utilities
• ChibiOS
  • git submodule pulled from our own fork of ChibiOS
• toolchain
  • development directory for cross compilers and openocd
• notes
  • general notes that don't have a more specific location

- As of Tue 04 March 2014 20:56:56 (PST)
- We are using a slightly modified version of Chibios Release 2.6.3
    - This is maintained in the PSAS Github Repository
- It is a submodule of the stm32 git project.

- PSAS is currently using two boards
    - Olimex e407
    - PSAS Rocketnet Hub

OpenOCD is the tool we use to communicate, flash, and debug the microcontroller via JTAG.

• Version v0.7.0 as of March 2014
• Instillation instructions:
  • The Debian and Ubuntu v0.7.0 packages now have the correct build flags so it's as simple as
    • sudo apt-get install openocd
  • For other systems, or if you are building it yourself, ensure that it's built with --enable-ft2232_libftdi --enable-stlink
• udev rules
  • To use OpenOCD without sudo, move 99-psas-jtag.rules in common/ to /etc/udev/rules.d/ and the run sudo udevadm control --restart. Alternativly some versions of OpenOCD ship with a more complete udev rule set in /usr/share/openocd/contrib/

GNU Tools for ARM Embedded Processors

• Version 4.8 as of March 2014

• Instillation instructions:

  • The prefered way is to use the provided PPA

• Ubuntu 14.04 and Debian testing recently (April 2014) introduced their own compiler package named gcc-arm-none-eabi, but it's not the same as ours and the packaging is broken anyway. If you've just upgraded to 14.04 run:

  sudo apt-get remove binutils-arm-none-eabi gcc-arm-none-eabi
  sudo apt-get autoremove
  sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded
  sudo apt-get update
  sudo apt-get install gcc-arm-none-eabi=4-8-2014q1-0trusty8
  

• Programmers used for JTAG
  • Olimex-arm-usb-ocd and STLinkV2 are what we currently use, but any supported by OpenOCD should work
• Debugging flow with GDB
  • make gdb will start gdb and connect it to openocd. make gdb_stl if you're using the StlinkV2 debugger.