keil下实现freertos移植与stm32平台，并在此基础上建立队列同步任务，-Keil freertos transplantation and realize the stm32 platform, and on this basis, they build queues synchronization tasks,

uCOS 任务调度 ，信号量，邮箱与消息队列原理详解，以及经典例子。-uCOS task scheduling, semaphores, mailboxes and message queues Detailed principles, as well as classic examples.