基于双缓冲和FPGA的RS422接口电路设计  

Design of RS422 Interface Circuit Based on Double-buffer and FPGA

作　　者：边庆[1] 吴琳[1] 段小虎[1] 

机构地区：[1]中航工业西安航空计算技术研究所,陕西西安710068

出　　处：《信息通信》2017年第4期55-56,共2页Information & Communications

基　　金：装备预研共用技术基金项目资助(编号:9140A16010311HK6101)

摘　　要：RS422异步串行通信技术广泛应用于机载计算机实时控制系统,提高了飞机的可维护性和可扩展性。设计了一种双缓冲模式RS422接口电路,采用通用的异步串行通信控制器。阐述了机载计算机RS422的通信协议,详细介绍了双缓冲策略。应用结果表明,该系统数据缓存能力强,提高了数据传输速度,使用简单。RS422 asynchronous serial communication technology is widely used in real-time control system of the onboard com-puter to improve the mamtainabilily and extensibility of the aircraft. Double- bu￡fer RS422 Inter＆ce Circuit is designed by using the universal asynchronous serial communicatian contrller. This article introduces commumcatioii protocol of flight contrl com-puter and the method of double- buffer. The strong data stco^e ability^iigh communicate speedand simple access are proved by application.

关 键 词：双缓冲 FPGA RS422 串行通信 

分 类 号：TN402[电子电信—微电子学与固体电子学]