进程通信的实现 分为三个基本文件，进程间信号传递、共享内存、消息机制、PV操作-Realization process communication is divided into three basic signal transmission between files, processes, shared memory, message mechanism, PV operation

接收CAN总线数据，通过消息传递给上层程序。-RECIVE CAN BUS DATA，with msg to up layer program.