基于RS-422总线的单片机多机通讯接口的设计与实现  

The Design and Realization of Multicomputer Communication between PC and SCM Based on RS-422 Bus

作　　者：桑胜举[1,2] 张华[1] 沈丁[1] 安琦[2] 

机构地区：[1]泰山学院信息科学技术学院,山东泰安271021 [2]华东理工大学动力学院,上海200237

出　　处：《泰山学院学报》2008年第6期5-10,共6页Journal of Taishan University

基　　金：泰山学院科研资助立项项目(Y06-02-15);泰安市大学生科技创新计划项目(2007D2059)

摘　　要：本文阐述了主从式多机通讯的原理,提出了一种基于RS-422串行通信接口的方案和软件设计方法.针对计算机与8051系列单片机串行口的通讯特点,设置计算机中通讯控制寄存器,使计算机满足单片机多机通讯的格式,实现了计算机和单片机的多机通讯.该方法已在实际应用中被广泛采用,并可推广应用于其他系统,对其他系统的硬件电路设计及程序设计具有一定的参考价值.This paper describes the principle of multicomputer communication, and also the hardware and software implementation method based on RS -422 bus is given. To make PC （Personal Computer） communication format in accord with SCM （Single Chip Micro -processor）, we set PC＇s communication control register according to the characteristic of PC and 8051 series SCM communication interface. So we realize the multicomputer communication between PC and SCM. The approach introduced here has worked smoothly in practical application and is valuable for the designs of both hardware and software.

关 键 词：单片机 多机通讯 RS-422接口 8051 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]