This is a showcase project demonstrating the required minimum of things needed to build an executable for STM32 Cortex-M3 processor without Cube IDE.
The tools needed are:
- GNU Compiler Collection
- GNU Make
- GNU Debugger Multi-Arch
- OpenOCD
Intall those first: sudo apt install gcc-arm-none-eabi gdb-multiarch make openocd. When on Windows \w WSL2, check for usbipd-win tool. This is needed for making host USB devices accessible by guest OS. Aside that, Windows users may need zadig or similar tool so to install WinUSB driver for STLink dongle.
On Ubuntu OpenOCD may experience hard times reaching out to STLink device telling something similar to Error: libusb_open() failed with LIBUSB_ERROR_ACCESS. An additional udev ruleset may be required in this situation:
$> sudo tee -a /etc/udev/rules.d/51-usb.stlink.rules > /dev/null << EOF
SUBSYSTEMS=="usb",ATTRS{idVendor}=="<VID>",ATTRS{idProduct}=="<PID>",GROUP="plugdev",TAG+="uaccess"
EOF
Both VID and PID can be retrieved either with usbipd wsl list on host or with lsusb [-vvv] output on guest system. Also, make sure your user belongs to plugdev user group by checking id `whoami` output.
When all set, do: sudo service udev restart && udevadm control --reload-rules.
Finally, re-attach the STLink device to WSL by means of usbipd.
A helpful article series this project is born after. Repository contains some reference documents that originate from STMicroelectronics site