基于AT89C51单片机的LED显示控制系统_毕业设计外文翻译Word文档格式.docx

基于AT89C51单片机的LED显示控制系统_毕业设计外文翻译Word文档格式.docx

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题 目：

基于AT89C51单片机的LED显示控制系统

系部名称：

电子信息工程学院专业班级：

自动化B095学生姓名：

张欣然学号：

200903024503指导教师：

黄佚教师职称:

讲师

2013 年 6月 10日

本文摘译自：

ApplicationofElectronicTechnique

外文文献原文：

DesignofLEDDisplayControlSystemBasedonAT89C52SingleChipMicrocomputer

Abstract—Thispaperintroducesdisplaydesignprocessabouthardwareandsoftware

basedonAT89C52singlechipmicrocomputer.Weuseasimpleexternalcircuittocontrolthedisplayscreen,whichsizeis32×

192.Thedisplayscreenalsocandisplaythesizeofthesix32×

32dotmatrixChinesecharactersbyadynamicscanmode,andcanbedividedintotwosmalldisplayscreen,whichcandisplaytwenty-fourChinesecharacterswhosesizeis16×

16.Wecanmodifythecodetochangethecontentofthedisplay,subtitlescanachievescrollingfunctionandthescrollspeedcanbeadjustedaccordingtorequirements,subtitlescanalsoachievepausefunction.TheChinesecharactercodestoredinexternaldatamemory,thecapacityofdatamemoryisexpandedaccordingtotherequirementsofChinesecharacterswewanttoshow.Thisdisplayscreenhasadvantagesofsmallvolume,fewhardwareandsimplecircuitstructure.

IndexTerms—LED,ChineseCharacterDisplay,AT89C52

I.INTRODUCTION

LEDdisplayhasbecomeanimportantsymbolofthecitylighting,modernizationandinformationsocietywithcontinuousimprovementandbeautificationofpeople'

slivingenvironment[6].LEDlightscanbeseeninthelargeshoppingmalls,railwaystation,docks,underground station,avarietyofmanagementwindowandsoon.

LEDbusinesshasbecomeafast-growingnewindustry,ahugemarketspaceandbrightprospects[9].Thetext,pictures,animationandvideoaredisplayedbyLED’slight,andcontentcanbechanged.Somecomponentsarethedisplaydevicesofthemodularstructure,andwhichusuallyconsistsofadisplaymodule,controlsystemandpowersystem.Thedisplaymoduleisconstitutedbythelatticestructurewhich

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consistsofLED,andisresponsibleforlight-emittingdisplay;

thescreencandisplaytext,pictures,videoandsoonbycontrolsystemwhichcancontrollightordarkofLEDinthecorrespondingregion;

Powersystemisresponsiblefortransforminginputvoltageandcurrentintovoltageandcurrentwhichthescreenneeds.LEDdotmatrixdisplayextracteddisplaycharacterfontthroughPC,andsenttothemicrocontroller,thendisplayedinthedotmatrixscreen,whichmainlyusedfordisplayofindoorandoutdoorcharacters.LEDdotmatrixdisplaycanbedividedintographicdisplay,imagedisplayandvideodisplaybydisplayedcontent.Comparedwiththeimagedisplay,thecharacteristicsofgraphicdisplayisnodifferenceingraycolorwhetheritismonochromeorcolordisplay.Therefore,graphicdisplayalsofailstoreflecttherichnessofcolor,andvideodisplaycannotonlyshowexercise,clearandfull-colorimages,butalsoshowtelevisionandcomputersignals.Althoughtherearesomedifferencesbetweenthethree,butthemostbasicprinciplesaresimilar[6].SCMhasexcellentcostperformance,smallsize,highreliability,strongcontrol,andwidelyusedinsmartinstruments,mechanicalandelectricalintegration,realtime processcontrol,robotics,domesticappliances,fuzzycontrol,communicationssystemsandsoon.ThisarticledescribedthedesignbytheLEDdisplayrelevantprinciple,andthedesignofhardwareandsoftwarestructurearedescribedindetail,finally,wesimulatefortheoveralldesignandanalyzetheresults.

II.SystemOverallStructureDesign

SingleChipMicrocomputer（SCM）modelswereselectedaccordingtothetarget,function,reliability,cost,accuracyandspeedofthecontrolsystem.Accordingtotheactualsituationofthesubject,thechoiceofSCMmodelsmainlyconsideredfromthefollowingtwoaspects:

First,SCMhasstronganti-interferenceability;

Second,SCMhasahighercost-effective.DuetoMCS-51iswidelyusedinChina,hasmoreinformationandcancompatiblewiththemoreperipheralchipstoo,inparticular,ATMELCorporation,introducedanewgenerationmicrocontrollerin2003,thatis89Sseries,anditstypicalproductswithhighperformanceandlowcostmicrocontrollerisAT89C52.AT89C52isalowvoltage,high-performanceCMOS

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8-bitmicrocontroller,thechipincludes8KBread-onlyprogrammemory（PEROM）whicherasecanberepeated,256byterandomaccessdatamemory（RAM）,devicesadopthigh-densitynonvolatilememorytechnologytoproduce,compatiblewiththestandardMCS-51instructionsetandthe8052products,whilethechipbuilt-ingeneral-purpose8-bitcentralprocessing（CPU）,Flashstorageunit,canbeappliedtothemorecomplexcontrolapplications[10].ThesystemwasrealizedbythecircuitrywhichismadeupofAT89C52chip,Clockcircuit,resetcircuit,