介绍了总线传输层和驱动层软件的双口ＲＡＭ接口区及其内部的数据结构，深入分析了总线通讯的读写锁机制、双缓冲区机制和应用于系统同步的ＲＴＣ机制，其目的在于开发可复用的总线通讯软件。

On the basis of descriptions of the dual port RAM connecting the transmission layer and drive layer software and its internal data structure, the paper analyzes the mechanism of reading and writing lock and dual data buffer applied to bus communication and the strategy of RTC used in system synchronization. The goals of such detail analysis is to develop the bus communication software with reusability.

TN959.73 TP311.5