基于国产CPLD的仲裁和事件记录卡设计

Design of Arbitration and Event Record Card Based on Domestic CPLD

针对某型号监控计算机对双机仲裁与事件记录的需求,利用国产化CPLDSM2210与国产Flash存储器SM25QH128设计一种具有仲裁和事件记录功能的控制卡。通过检测监控计算机CPU的心跳信号、主备机切换申请信号、电源控制信号等实现双机的相互仲裁控制;利用存储数据特征设计一种Flash智能续写算法,实现Flash自动续写功能;CPU通过IIC接口实现对事件的查询。结果表明:该仲裁、事件记录卡能实现仲裁与事件记录功能,且性能稳定。

Aiming at the requirement of a certain type of monitoring computer for dual-computer arbitration and event record,a control card with arbitration and event record functions is designed by using domestically produced CPLD SM2210 and domestically produced Flash memory SM25QH128.The mutual arbitration control of the 2 computers is realized by detecting the heartbeat signal of the CPU of the monitoring computer,the application signal for switching between the main and standby computers,and the power supply control signal;an intelligent flash continuous writing algorithm is designed by using the characteristics of the stored data to realize the automatic flash continuous writing function;CPU through the IIC interface,the query of the event is realized.The results show that the arbitration and event record card can realize the functions of arbitration and event record,and the performance is stable.