cortex-m

rt-thread

+17

RT-Thread is an open source IoT Real-Time Operating System (RTOS). https://rt-thread.github.io/rt-thread/

stlink

+15

Open source STM32 MCU programming toolset

tock/tock

+9

A secure embedded operating system for microcontrollers

rtic-rs/rtic

+9

Real-Time Interrupt-driven Concurrency (RTIC) framework for ARM Cortex-M microcontrollers

rmk-rs/rmk

+6

A modern, easy-to-use, and feature-rich keyboard firmware written in Rust.

pyocd/pyOCD

+4

Open source Python library for programming and debugging Arm Cortex-M microcontrollers

libopencm3

+2

Open source ARM Cortex-M microcontroller library