基于FPGA的数字电压表的设计摘要电子设计自动化(electronicdesignautomation,EDA)是近几年迅速发展起来的将计算机软件、硬件、微电子技术交叉运用的现代电子设计技术。其中EDA设计语言中的VHDL语言是一种快速的电路设计工具，功能涵盖了电路描述、电路综合、电路仿真等三大电路设计内容。本电压表的电路设计正是用VHDL语言完成的。此次设计主要应用的软件是美国ALTERA公司自行设计的一种CAE软件工具，即MAX+PLUSⅡ。本次所设计的电压表的测量范围是0～5V，精度为0.01V。此电压表的设计特点为：通过软件编程下载到硬件实现,设计周期短,开发效率高。关键词：电子设计自动化(EDA)；FPGA；VHDL；A/D采集；数字电压表DesignofDitalVoltmeterBasedonFPGAXieXingDu(CollegeofZhangJiajie,JishouUniversity,Jishou,Hunan416000)AbstractThedesignofdigitalsystemisbecomingfaster,bulkier,smallerandlighterthanbefore.Electronicdesignautomationisinthelastfewyearsquicklydevelop,itmakesuseofsoftware,hardware,micro-electronicstechnologytoformacourseofelectronicdesign.Amongthem,theVHDLlanguageofEDAisakindoftooloffastcircuitdesign,thefunctioncoveredthecircuitdescribe,thecircuitsynthesize,thecircuitimitatethetrueetc.ThecircuitofthedesignthatuseVHDLlanguagetocomplete.ThethistimedesignisprimarilytheappliedsoftwareisMAXPLUSⅡwhichismadebytheUnitedStatesALTERAcompany.Thissystem’srangeis-5vto+5vandprecisionis0.01v.Characteristicsofthiselectricvoltagewatchis:Passthesoftwareprogramtodownloadthehardwareorealize,designtheperiodisshort,developmenttheefficiencyishigh.Keywords:ElectronicDesignAutomation(EDA);FPGA;VHDL;A/DAcquisitiondigitalvoltageI目录第一章绪论...........................................................11.1研究目的及意义................................................11.2本课题国内外研究概况、应用前景..................................11.3研究的主要内容..................................................2第二章相关技术简介....................................................32.1EDA技术的简介..................................................32.2FPGA的概念与特点...............................................32.3VHDL语言概述...................................................52.4软件工具MAX+PLUSII的简介.......................................6第三章硬件电路设计....................................................83.1硬件电路框图....................................................83.2ADC0809模块....................................................93.2.1A/D转换器的主要技术指标...................................93.2.2ADC0809工作原理...........................................93.2.3.工作时序.................................................113.3FPGA模块......................................................11第四章FPGA功能模块的设计及仿真.......................................144.2控制模块.......................................................144.3数据处理模块...................................................154.4扫描、显示模块.................................................15第五章总结...........................................................17参考文献..............................................................18附录.................................................................19附录一：总电路图...................................................19附录二：程序清单...................................................20致谢................................................................24II基于FPGA的数字电压表的设计绪论第一章绪论1.1研究目的及意义数字电压表（Di...
