FreeRTOS

    * Free RTOS kernel - preemptive, cooperative and hybrid configuration options.
    * The SafeRTOS derivative product provides a high level of confidence in the code integrity.
    * Designed to be small, simple and easy to use.
    * Very portable code structure predominantly written in C.
    * Supports both tasks and co-routines.（同时支持任务和协程）
    * Powerful execution trace functionality.（强大的运行和跟踪功能）
    * Stack overflow detection options.（堆栈溢出检测）
    * No software restriction on the number of tasks that can be created.
    * No software restriction on the number of priorities that can be used.
    * No restrictions imposed on priority assignment - more than one task can be assigned the same priority.
    * Queues, binary semaphores, counting semaphores, recursive semaphores and mutexes for communication and synchronisation between tasks, or between tasks and interrupts.
    * Mutexes with priority inheritance.
    * Free development tools (Cortex-M3, ARM7, MSP430, H8/S, AMD, AVR, x86 and 8051 ports).
    * Free embedded software source code.
    * Royalty free.
    * Cross development from a standard Windows host.
    * Pre-configured demo applications for selected single board computers allowing 'out of the box' operation and fast learning curve.
    * Compile time configuration allows a ROM footprint print as low as 4.3Kbytes on an ARM7 (Thumb mode) using GCC (third party figures, requires specific GCC command line options).

看完这些介绍，让我对这个FreeRTOS有了一定的兴趣，但是对它的稳定性，现在有点质疑，不知道其稳定性能达到一个什么程度？能像uC-OS- II那样稳定可靠吗？它的出现是否要抢占uC-OS-II的市场呢？这无疑给uC-OS-II一个比较沉重的打击，我了解的和知道的实时操作系统都是收费的，没有免费的。它的免费，是否会像linux一样有前景呢？呵呵～期待它的强大。去下载一个源码，学习一下～