英文翻译-基于单片机的电子密码锁

word专业整理学习资料整理分享本科毕业设计（外文翻译）题目基于单片机的电子密码锁的设计与制作姓名杜祥专业电子科学与技术学号201031107指导教师李大海郑州科技学院电气工程学院word专业整理学习资料整理分享二○一四年五月word专业整理学习资料整理分享THEDESIGNOFMATRIXKEYBOARDANDLCDDISPLAYBASEDONMCUAbstractThedevelopmentofmicroelectronicstechnologyandindustrialmeasurerequirementbringagoodopportunityfordevelopmentandresearchsystem，whichmakesitabroadprospects.Theequipmenthastheadvantagesofsmallsize,singlepowersupplyandavarietyofoutputvoltageleadsithasaspecialmodule.Throughtheanalysisofthehardwarestructure,wecansummarizeseachmoduleneeds.Forexample,weoftengothroughthekeystorealizethecontroloftheelectronicdevice.Smalltowatchmobilephone,totheTVcomputer,toavarietyofcomplexinstruments,allneedtorealizevariousoperationsthroughthebuttons.Thisdesignisanimportantpartofstepforthefurtherresearch，usingbuttonstocontrolthedisplay，includesomemoduleslikeLCD1602liquidcrystaldisplay，4*4matrixkeyboard，STC89C52single-chipmicrocomputerandotherchips.CombinewiththeProteussoftware，thesimulationresultsaredisplayedontheLCDin1602typeofdata.KEYWORDS:Single-chip;LCD1602liquidcrystaldisplay;4*4Matrixword专业整理学习资料整理分享keyboard1IntroductionWiththedevelopmentofeconomyandtheprogressofscienceandtechnology,Microprocessorsandperipheralchipshavedevelopedrapidly.ThenewestdevelopmentoftheintegratedtechnologyistheCPUchipandexternal.Liketheprogrammemory,datamemory,parallel,serial,I/Otiming/counter,interruptcontrollerandothercontrolcomponentsareintegratedinachip—singlechip.SCMhasamanufacturingprocessCMOS,Thesmallerlithographyprocessimprovesintegrationwhichmakethechipspacesmaller,lowercost,lowerworkingvoltage,lowerpowerconsumption.AdoptsdoubleCPUstructure,increasingthewidthofdatabus,improvethespeedandtheabilityofdataprocessing,apipelinestructure,improvetheprocessingandcomputingspeed,inordertomeettheneedsofreal-timecontrolandprocessing.Toincreasethestoragecapacity,theinternalEPROMEPPROM,secureprogram,toimprovethedrivingcapabilityofparallelport,inordertoreducetheperipheraldrivingchip,increasethelogicfunctionandcontroltheexternalI/Oportflexibility.Peripheralinserialmodebasedexpansion;peripheralcircuitinternalinstallationisanobvioustrendtoconnecttheinternet.Reliabilityandapplicationlevelisgettinghigherandhigher.Somehigh-endmicrocontrollerandlaunchedinrecentyearsalsocontainsmanyword专业整理学习资料整理分享specialfunctionunit,SuchasA/Dconverter,modem,communicationcontroller,PLL,DMA,floatingpointunitetc.So,asweaddsomeexternalexpansionofthecircuitandchannelinterfaceitcanconstituteavarietyofcomputerapplications,suchasindustrialcontrolsystems,dataacquisitionsystem,automatictestsystem,intelligentinstrument,intelligentinterface,functionmoduleetc.WithMCUdevelopmentandcompletestructure,SCMhasbecomeapowerfultoolandwillhaveahigherlevelandbroaderdevelopment.2DesignofthewholestructureofsystemThisdesignisbasedonsingle-chip,includematrixkeyboardandLCDdisplaymodule.Single-chipisthefirstmodeltoselecttheappropriatetarget,function,reliability,cost,accuracyandspeedcontrolsystem.Accordingtotheactualsituationofthetopicselection,configurationmanagementmodeldifferentmainlyfromthefollowingtwoaspects:First,supplychainmanagementhasstronganti-interferenceability;second,SCMhasahigherprice.Forinformationinputmodule,keyboardselectioncanuseeconomicbenefitsandmeettherequirementsofthe4*4keymatrixkeyboardcanrealizemultifunctionkeyrequirements.Asfortheoutputmodule,usingLCD1602liquidcrystaldisplaymodule,liquidcrystaltoachievekeyinformationprocessingfunctionsaftertheshow.ThecircuitofthesystemisrequiredbyAT89C51chip,clockcircuit,resetcircuit,word专业整理学习资料整理分享drivingcircuit,scanninglinedrivingcircuitandLCD1602LCDscreen.4*4matrixkeyboardaccessofP1.0—P1.7,LCD1602screentoaccessP0.0—P0.7.3Systemhardwarecircuitdesign3.1LiquidcrystalmoduleTheprincipleofliquidcrystaldisplayistheuseofphysicalpropertiesofliquidcrystal,Thedisplaycontrolareavoltage,powerisdisplayed,itcandisplaygraphics.Liquidcrystaldisplaywiththinthickness,suitableforlargescaleintegratedcircuitdirectlydriven,easytorealizefullcolordisplaycharacteristics,hasbeenwidelyusedinmanyfieldsofportablecomputer,digitalcamera,PDAmobilecommunicationtoolsetc.1602liquidcrystalisalsocalledthe1602characterLCD,whichisaspecialusedtodisplayletters,numbers,symbolsoftheLCDmodule.Itiscomposedofapluralityof5X7or5X11dotmatrixcharactercomponents,eachdotmatrixcharacterwhocandisplayacharacter,thereisadistancebetweentheintervalofeach,thereareintervalsbetweeneachline,playedthecharacterspacingandrowspacing,andbecauseofthisitisnotwelldisplaygraphics(withcustomCGRAM,showtheeffectisnotgood).1602LCDreferstothedisplayofthecontentforthe16X2,whichcandisplaytwolines,16charactersperline(LCDmoduledisplayword专业整理学习资料整理分享charactersandnumbers).3.2Matrixkeyboardmodule1.KeycharacteristicsThekeyboardiscomposedofanumberofseparatekeys,pressandreleasekeyisthroughtheclosedmechanicalcontactandofftoachieve,becauseoftheelasticactionofmechanicalcontact,intheclosingandtheopeningofthemomenthasadither.Jittermustbeeliminated,includesoftwareandhardwareelimination.2．ScanningprincipleFirstdeterminewhetherakeyisclosed,andthenonebyonescantof