ADCP中利用CPLD实现DSP的数据空间扩展

Address space assignment of DSP external memory by using CPLD in ADCP

声学多普勒海流剖面仪(ADCP)是20世纪80年代初发展起来的一种流速测量测验新仪器。本文主要介绍ADCP中,鉴于数字信号处理器(DSP)本身数据存储空间有限的弊端,通过对复杂可编程逻辑器件(CPLD)探针结构的巧妙利用,进行逻辑设计,实现了FLASH和双口RAM的分时复用,从而达到扩展数字信号处理器外部数据存储空间的目的。利用QuartusII进行了时序仿真实验,并在ADCP中得到实现证明该方法是有效的。

Doppler Current Profiler is a traditional flow measuring instrumentation arisen at beginning of 80s. The technique is used to far-measure the stereo velocity of ocean current with vector synthesis according to Doppler theory. In this paper, we introduce a method to extend the external memory of DSP （Digital Signal Processing） in AI^P. Through the reasonable using of probe in CPLD （Complex Programmable Logic Device） and logical design, the timesharing multiplexing of FLASH and DURAM is realized so as to achieve the intention of extending the external memory of DSP. The simulation results with Quartus Ⅱ and ADCP indicate that this method is effective.