八通道数据采集及监控系统的设计

The Design of Data Acquisition and Control System Based on CPLD

主要以多路数据的采集及监测系统为例,介绍可编程逻辑器件在模数转换、数模转换及数据监控与处理中的设计方法。此系统由三大部分组成,其中数据处理及监控系统单元用VHDL语言进行设计,利用MAX+PLUSⅡ软件进行电路仿真,并用CPLD硬件实现;输入单元及输出单元用ADC0809及DAC0832芯片实现。设计中采用了自顶向下的方法,将系统按逻辑功能划分模块,各模块使用VHDL语言进行设计,在ISE中完成软件的设计和仿真。

Taking the multi-channel data acquisition and monitoring system as an example, the article mainly introduces the design methods of the programmable logic device in analog-to-digital conversion, digital-to-analog conversion, data monitoring and processing. The system consists of three major components, among them the data processing and control systems unit is designed by VHDL language and realized with CPLD hardware; the input and output unit is realized with the using of ADC 0809 and DAC0832 chip. In the design, by the up to down method, the system divides the module according to logic function, each module is designed by VHDL language, and circuit design and simulation is done by utilizing ISE software.