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介绍采用分时复用的方法解决多嵌入式微处理器EMU共享RAM的技术,以便实现数据的快速交换;详细论述用CPLD实现该技术的方法及EMU分时复用共享RAM的工作原理,其逻辑控制电路可以使用一片MAX7032来实现,EMU地址的分配控制电路根据系统的电源情况可以采用EPM7128或EPM3128器件来实现;探讨EMU访问共享RAM地址空间的三种方式,并比较它们各自的优缺点;提供用VerilogHDL语言编写的主程序代码。该方案投入某型电力自动化控制系统中使用,卓有成效。
This paper introduces the technology of time sharing multiplexing to solve the problem of multi-embedded microprocessor EMU shared RAM in order to achieve the rapid exchange of data. The paper discusses in detail the method of implementing this technology with CPLD and the working principle of EMU time-shared shared RAM Control circuit can be used to achieve a MAX7032, EMU address allocation control circuit according to the power supply system can be used EPM7128 or EPM3128 devices to achieve; to explore the EMU shared RAM address space access to the three ways and to compare their respective advantages and disadvantages; provide The main program code written in VerilogHDL language. The program into a type of power automation control system used, fruitful.