STM32_Baremetal

Programming STM32 Microcontrollers with Device Driver libraries built from scratch using basic command line tools and no IDE's.

Note: The Driver Files are still in development. They will be updated in the future

Board Used:

• Blue Pill: STM32F103C8T6

Files Structure:

• Device Drivers Header and Source Files
  • Libraries used to interact with hardware
• Startup File
  • startup sequence when the microcontroller is powered on
  • contains,
    • Interrupt / Exception Vector Table
    • Reset Handler
      • transfers the data section into RAM from Flash
      • initializes the bss section (uninitialized variables) with 0
• linker script
  • combines the common sections of various source files into a single one
• make file
  • automating the compilation, linking, creating elf, flashing the microcontroller

Software Used:

• arm gcc tool chain: https://developer.arm.com/Tools%20and%20Software/GNU%20Toolchain
• openocd: https://github.com/xpack-dev-tools/openocd-xpack/releases
• make: https://gnuwin32.sourceforge.net/packages/make.htm
• st-link tools: https://github.com/stlink-org/stlink

Make Commands:

• make compile: Compile the C source files -> Main + Startup + Drivers
• make dump: Get a dump of the assembly contents and the section contents of the final code
• make clean: Delete the output and dump files created by the compile and dump commands
• make load: flash the microcontroller with the final elf generated.
• make probe: get info on the microcontroller connected to your system
• make: to compile the files and flash the microcontroller all at once