Stm32_ucos_4

代码说明：

  该程序使用消息邮箱，在内存空间开辟了一片区域，供4个任务共享读写。1个任务在写内存时，其它任务不能读写。多个任务可以同时读该内存区域数据。(This program uses the message mailboxes, the memory space to open up a regional, shared reading and writing for the four tasks. A task to write the memory and other tasks can not read and write. More than one task can read the memory area data.)