论文-基于CPLD的高速数据采集系统.doc

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摘 要本文针对高速数据采集的设计,介绍高速数据采集卡的硬件结构及工作原理,讲述cpld在数据采集与数据存储的时序控制的vhdl模块设计，给出各控制模块的vhdl源程序。文章针对电路高速时产生的一些问题进行分析，讨论用于指导布局、布线约束规则的过程及思路,并给出高速采集卡电路的pcb设计版图。此数据采集卡ad转换速率为30mhz，数据缓存1m，并通过单片机于计算机通信进行数据处理。文章总将同时介绍高速采集卡电路用到的数模转换芯片tlc5540,编程器件epm7128,存储芯片cy7c1049和 单片机89s52等集成电路的特点与工作原理，并对整个高速数据采集卡的设计过程中遇到的问题做出经验总结。关键词 ：cpld vhdl 高速数据采集卡 abstract this paper is about the high-speed data acquisition card. it will describes the hardware structure and working principle of the high- speed acquisition card , and the vhdl module design on cpld about the time series control on data collection and data store. it will also show all of the program lists. in this article, it will analyses some problem of the high-speed circuits. it will discuss the method of pcb wiring design. on the data collection card , a/d speed is 30mhz,data buffer is 1mhz. data communicate with the external device by single chip microcomputer. this paper will also introductive tlc5540,emp7128,cy7c1049 and 89s52 ic character and work principle, and summarize the experience of the design.keywords: cpld vhdl high-speed data acquisition card; 目 录引 言1第一章tlc5540 a/d转换电路31.1 模拟信号与数字信号简介31.2 tlc5540性能特点31.3 tlc5540引脚与工作原理4第二章 at89s52 单片机62.1 结构与特点62.2 定时器/计数器82.3 中断9第三章 cpld 复杂逻辑编程器件103.1 cpld概述103.2 max7000系列性能简介103.3 max 7000 的编程下载13第四章 cy7c1049 存储器件164.1 存储器简介164.2 cy7c1049性能特点 与工作原理16第五章 软件设计205.1 vhdl 硬件描述设计简介205.2 cpld在数据采集卡中的工作原理215.3 cpld描述设计及模块划分22第六章 硬件设计286.1 protel dxp背景概况286.2 protel dxp的强大功能特点简介286.3 印刷电路板设计系统 pcb的特点306.4 数据采集卡原理图设计316.5 印刷电路板设计系统pcb32特别感谢36参考文献37引 言随着数字时代的到来，数字技术的应用已经渗透到了人类生活的各个方面。现代工业生产和科学研究对数据采集的要求日益提高，在瞬态信号测量、信号处理等一些高速、高精度的测量中，需要进行高速