实现RS-485/RS-422和CAN转换——总线网桥的构建  

The Implementation of A Bridge Between RS-485/RS-422 Bus and CAN Bus

作　　者：丁学文 张琦 杨玲 

机构地区：[1]西安科技工程学院信控系,西安710048

出　　处：《电气自动化》2002年第3期56-58,共3页Electrical Automation

摘　　要：本文介绍了一个能实现RS-485(422)总线和CAN总线相互转换的总线网桥的设计实例。这个网桥由CAN控制器SJA1000、微处理器AT89C52、CAN总线驱动器82C250和RS-422接口芯片MAX1490B等组成。文中简述了该网桥的工作原理,列出了它的程序框图,还对它的应用结果作了介绍。The article describes a practical example of an implementation of a Bridge between RS-485/RS-422 bus and CAN bus.The Bridge is made of chipsets of CAN controller SJAIOOO. CAN interface driver 82C250,CPU AT89C52 and RS-485/RS-422 data interface MAX1490B etc. An application example of the bridge and a programming block about initialization of the bridge are given in this article. At last,the result of an application is discussed.

关 键 词：总线网桥 CAN总线 RS-485总线 RS-422总线 

分 类 号：TP336[自动化与计算机技术—计算机系统结构] TN915.05[自动化与计算机技术—计算机科学与技术]