Possibly the most popular among the open source operating systems for embedded devices, FreeRTOS is a well-established project with more than 15 years of development history, and it is extremely portable across many embedded platforms, with more than 30 hardware-specific ports.
Designed with small-code footprint, simple interfaces in mind, this system does not offer a complete driver's platform or advanced CPU-specific features, but rather focuses on two things: real-time scheduling of the threads and heap memory management. The simplicity of its design facilitates the port to a large number of platforms, and keeps the development focus on a restricted amount of well-tested and reliable operations.
Nevertheless, third-party libraries ...
