May 2020
Intermediate to advanced
496 pages
13h 54m
English
Content preview from Hands-On RTOS with Microcontrollers
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FreeRTOS and POSIX
The Portable Operating System Interface (POSIX) was developed to provide a unified interface for interacting with operating systems, making code more portable between systems.
At the time of writing, FreeRTOS has a beta implementation for a subset of the POSIX API. The POSIX headers that have been (partly) ported are listed here:
- errno.h
- fcntl.h
- mqueue.h
- mqueue.h
- sched.h
- semaphore.h
- signal.h
- sys/types.h
- time.h
- unistd.h
Generally speaking, threading, queues, mutexes, semaphores, timers, sleep, and some clock functions are implemented by the port. This feature set sometimes covers enough of a real-world use case to enable porting applications that have been written to be POSIX-compliant to an MCU supporting FreeRTOS. Keep ...