摘要提出了一种嵌入式实时系统多任务或进程间通过消息进行通信的方法，着重分析了两级消息通信方式在程控交换机上的异步通信的实现。

• A real-time communication mode is presented based on the messages between the tasks or processes in the embedded real-time system, The realization of the asynchronous communication based on this two-level message in the switches controlled by the program is analyzed.