基于RS-485总线的PC机与单片机串行通讯仿真系统的设计

Serial Communication Simulation System Based on RS-485 Bus Between PC and Single-chip Microcomputer

介绍了RS-485总线标准及其通信接口器件MAX487,通过与RS-232C的比较,运用Proteus仿真软件,设计了基于RS-485总线的PC机与单片机组成的串行通信测控系统,并介绍了接口原理及程序设计。

This paper introduces the RS-485 bus and the transceiver MAX487.By comparing with RS-232c bus,the serial communication simulation system based on RS-485 bus between PC and single-chip microcomputer is given by using Proteus ISIS.The communication interface and some programs are also introduced in detail.