ARM Cortex-M3/M4 on Linux, gcc and freesoftware

the goal is to:

• buy a cheap stm32 cortex-m3 module and a SWD programmer

  • example kit: [https://www.aliexpress.com/item/STM32F103C8T6/32779896380.html] ~$8
  • contains a simple stm32f103 based module, similar to (or the same as) the Blue Pill
  • Jlink OB ARM emulator debugger (clone of the Segger jlink device)
  • also have an stm32 st-link v2 programmer which is < $2 on aliexpress

• use only gcc, openocd, gdb and other free software to develop, flash and debug them

• don't use Eclipse or any other bloatware IDEs or stuff

Plan

• make a minimal blinky program in C
• serial communication in C
• bootloader (STM32duino)
• try Rust
• try FreeRTOS/Apache mynewt
• try to port the learned knowledge to a nrf52 cortex-m4 µC

Requirements

• GNU/Linux distro (I use Arch)
• arm-none-eabi-binutils (tested with 2.30)
• arm-none-eabi-gcc (7.3.0)
• arm-none-eabi-gdb (8.1)
• arm-none-eabi-newlib (3.0.0)
• stlink 1.5.0

Resources:

• [http://electronut.in/stm32-start/]
• [https://electronics.stackexchange.com/questions/27594/]
• [https://en.wikipedia.org/wiki/List_of_ARM_Cortex-M_development_tools#C/C++_software_libraries]
• [https://blog.aignacio.com/http-wiki-stm32duino-com-index-php-title-blue_pill/]
• [https://github.com/satoshinm/pill_blink/]