libopencm3

This is a higher level API (or HAL) for using the serial port (USART1, USART2, USAR3, etc.), intially developed on the Blue Pill (STM32F103C8) with libOpenCM3.

A custom controller built with libopencm3, running on the Bluepill board.

NOT RTOS. Periodic Tasks driven by SysTick on Cortex-M STM32.

Basic example of libopencm3 on a STM32F103 "blue pill" board.