This is a minimal example of how to do task swithing on a Cortex-M3 or Cortex-M4. Tested on Nucleo-F446RE evaluation board. Step 0 for a (real time) operating system.
On linux, you'll need some kind of driver to upload to the evaluation board. In case of Nucleo-F446RE, you'll need to install STM32CubeIDE and STM32Cube Programmer which include the necessary drivers. You'll also need a cross-compiler e.g. gcc-arm-none-eabi. Once this is done, enter this on the command line:
- Make a directory for the object files
mkdir obj - Compile it with
make
- Upload obj/minimal.elf with STM32Cube Programmer to the MCU