摘要
本文提出了一种适用工业现场使用的实现PC机与多台单片机之间的串行通信方案．采用RS－485串行总线标准，硬件结构简单，传输可靠性高，通信距离可达1500米文中包括了该通信方案的硬件和软件设计。
This paper introduces a serial data communication scheme of PC and single-chip computer using RS-485 bus standard. The structure of hardware is simple and the dependability is excellent. The transport distance can extend to 1500 meters. The paper includes the system design of hardware and software.
关键词
RS-485总线标准
串行通信
PC机
单片机
RS-485 bus standard, distributed system, serial data communication, communication protocol
