2.5 KiB
MicroPython port to STM32 MCUs
This directory contains the port of MicroPython to ST's line of STM32Fxxx microcontrollers. It is based on the STM32Cube HAL library and currently supports: STM32F401, STM32F405, STM32F411, STM32F429, STM32F746.
The officially supported boards are the line of pyboards: PYBv1.0 and PYBv1.1 (both with STM32F405), and PYBLITEv1.0 (with STM32F411). See micropython.org/pyboard for further details.
Other boards that are supported include ST Discovery and Nucleo boards. See the boards/ subdirectory, which contains the configuration files used to build each individual board.
Build instructions
An ARM compiler is required for the build, along with the associated binary
utilities. The default compiler is arm-none-eabi-gcc, which is available for
Arch Linux via the package arm-none-eabi-gcc, for Ubuntu via instructions
here, or
see here for the main GCC ARM
Embedded page. The compiler can be changed using the CROSS_COMPILE variable
when invoking make.
To build for a given board, run:
$ make BOARD=PYBV11
The default board is PYBV10 but any of the names of the subdirectories in the
boards/ directory can be passed as the argument to BOARD=. The above command
should produce binary images in the build-PYBV11/ subdirectory (or the
equivalent directory for the board specified).
You must then get your board/microcontroller into DFU mode. On the pyboard connect the 3V3 pin to the P1/DFU pin with a wire (they are next to each other on the bottom left of the board, second row from the bottom) and then reset (by pressing the RST button) or power on the board. Then flash the firmware using the command:
$ make BOARD=PYBV11 deploy
This will use the included tools/pydfu.py script. You can use instead the
dfu-util program (available here) by
passing USE_PYDFU=0:
$ make BOARD=PYBV11 USE_PYDFU=0 deploy
If flashing the firmware does not work it may be because you don't have the correct permissions. Try then:
$ sudo make BOARD=PYBV11 deploy
Or using dfu-util directly:
$ sudo dfu-util -a 0 -d 0483:df11 -D build-PYBV11/firmware.dfu
Accessing the board
Once built and deployed, access the MicroPython REPL (the Python prompt) via USB serial or UART, depending on the board. For the pyboard you can try:
$ picocom /dev/ttyACM0