单片机串行通信中两个问题的讨论

Discussing of the Two Questions on Microcomputer Serial Communication

针对单片机串行通信中经常遇到的 ,通信距离近和串行口资源少。以 Intel89c5 1为例 ,介绍了解决方案。一是利用 RS485总线协议实现远距离传输 ;二是利用普通 I/ O口实现串行接口功能 ,并给出了两种设计思路的硬件和软件实现方法。该方法已在铁路与军用中运行多时 ,证明稳定性好 ,抗干扰强。

By the two questions of microcomputer serial communication frequently met, short communication distance and few serial resources, it is introduced as Intel89c51 that how to dispose the two questions One is using Rs485 bus to realize far distance communication and another using common I/O to get the function of serial interface Design method of hardware and software is given