STM32F103 template bare metal programming

This is a sample project for bare metal programming STM32F103 blue pill board

setup requirements

• stm32f103c8t6 microcontroller, with default factory bootloader (must)
• Linux debian
• sublime/vi/vim/gedit any
• ARM cross compiler toolchain
  • sudo apt-get install gcc-arm-none-eabi binutils-arm-none-eabi
• To program the controller you will need either of the following options
  1. using usb to uart controller
  • stm32flash to flash the controller, considering the controller has default factory bootloader
    • sudo apt-get install stm32flash
  • usb to uart converter
    • PL2303HX, CP2102, ftdi etc
  2. using stlink
  • install stlink toolchain
  • stlinkv2 programmer
• linker script and the startup code(with flash and ram addresses modified)
  • The project uses them directly copied from the arm crosscompiler toolchain samples and examples
  • it is tedious and generally unproductive to write them, but a very healthy mental excercise for people not used to them like myself.

STM32F10x Reference Manual

I do not recommend baremetal programming.
1st May'2020 edit : I do recommend bare metal programming now, projects based on this template have made me learn immensely, since then.