基于CPLD的双CPU冗余通信控制系统研究  

Research on Dual⁃CPU redundant communication control system based on CPLD

作　　者：许爽 唐青 肖再南 曹唯一 陈志强 XU Shuang;TANG Qing;XIAO Zainan;CAO Weiyi;CHEN Zhiqiang(Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Precision Manufacturing Research Institute,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学冶金装备及其控制省部共建教育部重点实验室,湖北武汉430081 [2]武汉科技大学机械传动与制造工程湖北省重点实验室,湖北武汉430081 [3]武汉科技大学精密制造研究院,湖北武汉430081

出　　处：《现代电子技术》2022年第11期1-5,共5页Modern Electronics Technique

基　　金：国家自然科学基金项目(51905393);国家留学基金项目(201808420326);武汉朝阳青年科技项目(202004)。

摘　　要：在通信系统的数据传输过程中易出现部件失效、总线冲突以及噪声干扰等问题,针对这一情况,构建了基于CPLD的双CPU冗余通信系统,采用CPLD作为仲裁模块,实时监测两个CPU的运行状态,及时做出准确的逻辑判断,实现双CPU之间的总线切换。此外,CPLD外接一个SRAM作为双CPU之间工作信息的存储器,保证信息数据传输的实时性和高效性,以提高通信系统的可靠性,而且系统采用双以太网和双RS 422组成的交互通信冗余网络,利用冗余技术进一步提高了整个系统的可靠性。该技术能有效保障通信系统持续稳定地运行,在各个领域的通信系统中都有非常大的应用价值。In the process of data transmission of the communication system,component failure,bus conflict and noise interference occur easily.In view of this,a dual⁃CPU redundant communication control system based on CPLD(complex programmable logic device)is constructed.In the system,CPLD is taken as the arbitration module to monitor the running state of the two CPUs in real time,make accurate logical judgment in time,and realize the bus switching of the dual⁃CPU.In addition,the CPLD is connected with an SRAM(static random access memory),which is taken as the memory of working information of the dual⁃CPU to ensure the real⁃time and high efficiency of information and data transmission,so as to improve the reliability of the communication system.Moreover,the interactive communication redundancy network composed of double Ethernet and double RS 422 is adopted,which further improves the reliability of the whole system by redundancy.This technology can effectively ensure the continuous and stable operation of communication system,and has great application value in various fields of communication system.

关 键 词：通信控制系统 冗余通信 双CPU CPLD 逻辑仲裁 SRAM 总线切换 

分 类 号：TN919.6-34[电子电信—通信与信息系统]