stm32f429i-disc1: STM32Cube


This target is in a very preliminary state and is under active development. This demo gives a preview of the direction we are heading with pw_system, but it is not yet ready for production use.

The STMicroelectronics STM32F429I-DISC1 development board is currently Pigweed’s primary target for on-device testing and development. This target configuration uses pw_system on top of FreeRTOS and the STM32Cube HAL rather than a from-the-ground-up baremetal approach.


To use this target, Pigweed must be set up to use FreeRTOS and the STM32Cube HAL for the STM32F4 series. The supported repositories can be downloaded via pw package, and then the build must be manually configured to point to the locations the repositories were downloaded to.

pw package install freertos
pw package install stm32cube_f4
pw package install nanopb

gn args out
  # Add these lines, replacing ${PW_ROOT} with the path to the location that
  # Pigweed is checked out at.
  dir_pw_third_party_freertos = "${PW_ROOT}/.environment/packages/freertos"
  dir_pw_third_party_stm32cube_f4 = "${PW_ROOT}/.environment/packages/stm32cube_f4"
  dir_pw_third_party_nanopb = "${PW_ROOT}/.environment/packages/nanopb"

Building and running the demo

This target has an associated demo application that can be built and then flashed to a device with the following commands:

ninja -C out pw_system_demo

openocd -f targets/stm32f429i_disc1/py/stm32f429i_disc1_utils/openocd_stm32f4xx.cfg -c "program out/stm32f429i_disc1_stm32cube.size_optimized/obj/pw_system/bin/system_example.elf reset exit"

Once the board has been flashed, you can connect to it and send RPC commands via the Pigweed console:

pw-system-console -d /dev/{ttyX} -b 115200 --proto-globs pw_rpc/echo.proto --token-databases out/stm32f429i_disc1_stm32cube.size_optimized/obj/pw_system/bin/system_example.elf

Replace {ttyX} with the appropriate device on your machine. On Linux this may look like ttyACM0, and on a Mac it may look like cu.usbmodem***.

When the console opens, try sending an Echo RPC request. You should get back the same message you sent to the device.

>>>"Hello, Pigweed!")
(Status.OK, pw.rpc.EchoMessage(msg='Hello, Pigweed!'))

You are now up and running!