ucos的邮箱机制的应用实验，按键与点灯相结合，实现进程任务的实时通讯-ucos mbox

ucosii在stm32上的实验例程，开发环境为keil4,代码清晰，可以修改移植到自己的单片机上。-ucosii the stm32 on experimental routines, development environment for keil4, clear code, you can modify transplanted to their own microcontroller.