双口RAM在双CPU交流电量同步采集系统中的应用

Application of Dual-Port RAM in the Synchronous Sampling System of AC Electric Signals Based on Dual-CPU

在交流电量同步采集系统的设计中,提出了采用双口RAM实现PC104工控机与DSP间高速数据通信的方案。介绍了双口RAM芯片IDT70V28L15PF的功能特点,设计了双CPU硬件接口电路,并给出了3种仲裁方式,有效地解决了两系统间的通信争端。运行结果表明,该设计能保证两CPU间高速、稳定的数据交换。

In the design of the synchronous sampling system of AC electric signals, a scheme of adopting dualport RAM to achieve high-speed data communication between PC104 Industrial control computer and DSP was put forward. The function of the dual-port RAM chip IDT70V28L15PF was described and the hardware interface circuit of dual-CPU was designed. Three arbitration methods which effectively solved the communication dispute between the two systems were presented. The running result shows that the design can guarantee the high-speed and stable data exchange of dual-CPU.