RT-Thread - A Tiny and Elegant IoT Operating System

RT-Thread (Real-Time Thread) is an open source embedded real-time operating system. It has a strong scalability: from a nano kernel running on a tiny MCU, for example ARM Cortex-M0, or Cortex-M¾/7, to a rich feature system running on MIPS32, ARM Cortex-A, even the emerging open source RISC-V architecture is supported. RT-Thread can run either on single-core systems or on symmetric multi-core processors(SMP) systems.

Kernel includes preemptive multi-task real-time scheduler, and infrastructure such as semaphore, mutex, mailbox, message queue, signal, event, memory management, timer management, interrupt management, etc. It also includes libcpu/BSP (file related to chip transplantation/board support package). It supports FAT, UFFS, NFSv3, ROMFS, RAMFS file system.