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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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
2
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,
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