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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 presents a solution for serial communication between a PC and multiple microcontrollers for industrial field use. Using RS-485 serial bus standard, the hardware structure is simple, the transmission reliability is high, and the communication distance is up to 1500 meters. The hardware and software design of the communication scheme are included in the text.