双口RAM在DSP与ICCD通信系统中的应用

The Application of Dual Port RAM in Communication System Between DSP and ICCD

提出了利用双口RAM实现高时间分辨率光谱测量系统中DSP与ICCD并行接口的设计方案,以确保使双方的高速通信。介绍了双口RAM器件IDT7007的原理与使用规则,并针对方案,给出了接口电路和软件流程。针对二者交换数据的仲裁方式,提出了解决冲突争端的方法。整体系统通过调试,证明文中采取的中断,忙逻辑,软件协调三种模式,有效解决了两个系统之间的通信争端。信息处理系统与ICCD可良好协调工作,系统运行稳定,构成合理,保证了整体系统的实时性。

A method is presented in the paper with the using of dual-port RAM in a high time-resolution measurement system to realize the interface between digital signal processors and ICCD so as to make sure the DSP communicating with the ICCD in a high speed.The principle and operating rule of IDT7007 is introduced and also the interface circuit and flow chart is given according to the design.Three methods are discussed to prevent the conflict of two systems according to the way of data exchanging between both sides.Through the debugging in whole system,it proves that the three kind of pattern effectively resolves the correspondence conflicts between two systems.Information processing system and ICCD can make good coordination work.The system is stable and constitute is reasonable so as to ensure the overall system in real time.