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1、点阵广告牌设计一、摘要单片机自20世纪70年代问世以来，以极其高的性价比受到人们的重视和关注，所以应用很广，发展很快。单片机的优点是体积小、重量轻、抗干扰能力强，对环境要求不高，价格低廉，可靠性高，灵活性好，开发较为容易。在我国，单片机已被广泛应用于工业自动化控制、自动检测、智能仪表、家用电器等各个方面。在现代工业控制和一些智能化仪器仪表中，越来越多的场所需要用点阵图形显示器显示汉字。汉字显示方式是先根据所需要的汉字提取汉字点阵（如16×16点阵），将点阵文件存入ROM，形成新的汉字编码；而在使
2、用时则需要先根据新的汉字编码组成语句，提取相应的点阵进行汉字显示。本设计由单片机AT89C51的P0口传送数据，P1口和P0口配合选择所要显示的行，P2口和P0口配合选择所要显示的列。再由8×8点阵LED显示器及其他一些外围电路显示所要求的显示的点阵式汉字、图形以及动画。其中的汉字编码由Zimo221应用程序提取。关键词：单片机，LED显示器Page34of34点阵广告牌设计IntroductionThesinglechipMicrocomputerhasbeenpublishedsinceth
3、e20thcentury70's,comparedtoisvaluedpeople'sandtheattentionbytheextremelyhighnaturalprice,thereforeapplicationverybroad,thedevelopmentisveryquick.ThesinglechipMicrocomputeristhevolumesmall,theweightlight,theantijammingabilitystrong,isnothightotheenvir
4、onmentrequest,priceinexpensive,reliabilityhigh,flexibilitygood,thedevelopmentiseasy.Generalengineersandtechniciansafterstudyrelatedmonolithicintegratedcircuitknowledge,alsocandependuponthesinglechipMicrocomputersystemwhichownstrengthdevelopshoped,and
5、mayobtainthehighereconomicefficiency.Becauseofthis,inourcountry,thesinglechipMicrocomputerwidelyhasbeenappliedintheindustrialautomationcontrol,theautomaticdetection,theintelligentmeasuringappliance,thedomesticelectricappliancesandsooneachaspect.Inthe
6、modernindustrycontrolandinsomeintellectualizedinstrumentmeasuringappliances,moreandmoremanyplacesneedtousethelatticegraphmonitortodemonstratetheChinesecharacter.TheChinesecharacterdisplaymodeisfirstaccordingtotheChinesecharacterwhichneedswithdrawsthe
7、Chinesecharacterlattice(forexample16×16lattice),storesthelatticedocumentROM,formsthenewChinesecharactercode;ButwhenuseneedsfirstaccordingtothenewChinesecharactercodecompositionsentence,thenactsaccordingtothenewcodebyMCUtowithdrawthecorrespondinglatti
8、cetocarryontheChinesecharacterdemonstration.ThesinglechipMicrocomputercontrolstheLEDlatticedemonstrationatpresentextremelytobewidespreadinthepublicplaceapplication.Forexamplethestationstartsoutthetimetoinstructthat,thestockhallstockpricedisplaypanel,
