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1、河南工業(yè)職業(yè)技術(shù)學(xué)院畢業(yè)論文河南工業(yè)職業(yè)技術(shù)學(xué)院HenanPolytechnicInstitute畢業(yè)設(shè)計(jì)(論文)題目LED點(diǎn)陣廣告牌電路設(shè)計(jì)班級(jí)計(jì)算機(jī)控制0904姓名王麗君指導(dǎo)教師楊云基于單片機(jī)的Led點(diǎn)陣廣告牌設(shè)計(jì)31河南工業(yè)職業(yè)技術(shù)學(xué)院畢業(yè)論文【摘要】本設(shè)計(jì)使用AT89C51系列高速單片機(jī)作為主控制模塊,利用簡(jiǎn)單的外圍電路來(lái)驅(qū)動(dòng)64×16的點(diǎn)陣LED顯示屏。利用AT89C51系列高速單片機(jī)本身強(qiáng)大的功能,可以很方便的實(shí)現(xiàn)單片機(jī)與PC機(jī)間的數(shù)據(jù)傳輸及存儲(chǔ),并能利用軟件方便的進(jìn)行顯示內(nèi)容的多樣變化,另一方面點(diǎn)陣顯示屏廣泛
2、的應(yīng)用于醫(yī)院、機(jī)場(chǎng)、銀行等公共場(chǎng)所,所以本設(shè)計(jì)具有很強(qiáng)的現(xiàn)實(shí)應(yīng)用性。本LED顯示屏能夠以動(dòng)態(tài)掃描的方式同時(shí)顯示4個(gè)16×16點(diǎn)陣漢字,并能通過(guò)上位機(jī)軟件修改顯示內(nèi)容和顯示效果等等。把字符內(nèi)碼存儲(chǔ)在空閑的單片機(jī)程序存儲(chǔ)器空間,使本LED顯示系統(tǒng)能掉電存儲(chǔ)1024個(gè)字符。設(shè)計(jì)中采用了SPI接口的GB2312標(biāo)準(zhǔn)字庫(kù),支持所有的國(guó)標(biāo)字符和ASCII標(biāo)準(zhǔn)字符的顯示。因?yàn)椴捎么袀鬏敺绞?,使本系統(tǒng)的可擴(kuò)展性得到提升,便于多個(gè)顯示單元的級(jí)聯(lián)。本文從LED的顯示原理入手,詳細(xì)闡述了LED動(dòng)態(tài)顯示的過(guò)程,以及硬件電路的設(shè)計(jì)、計(jì)算和軟件的算
3、法?!娟P(guān)鍵詞】動(dòng)態(tài)顯示;單片機(jī);點(diǎn)陣字庫(kù)31河南工業(yè)職業(yè)技術(shù)學(xué)院畢業(yè)論文LeddotmatrixbasedonsinglechipdesignbillboardsWEIJiaFeng(ShaanxiInstituteofTechnologyComputerScienceandTechnology,DepartmentofComputerScienceandTechnology061class,ShaanxiHanzhong723001)Instructor:LIJianZhongAbstract:Thisdesignuse
4、sSTC12CseriesMCUasamaincontroller,anddependsonasimpleexternalcircuittodrive96×16thelatticeLEDdisplay.ByusingitsownpowerfulfunctionsandcapacityofinternalE2PROM,itiseasytoaccomplishtheMCUandPCandE2PROMforinternalstorage,datatransmissionequipment,anditalsocanbeusedco
5、nvenientlytoshowavarietyofcontentchanges.Theotherdotmatrixdisplayiswidelyusedinhospitals,airports,banksandotherpublicplaces.Therefore,thedesignhasastrongpracticalapplication.TheLEDDisplaydynamicscancanshowthewayatthesametimesix16×16dotmatrixChinesecharacters,andPC
6、softwarecanmodifythecontentandeffectshows,andsoon.IAPusedintheapplicationofprogrammabletechnology,thecharacterswithinthecodestoredintheSCMfreeprogrammemoryspace,sothattheLEDdisplaysystemcanstore1,024brown-outcharacters.SPIusedinthedesignoftheinterfacestandardGB231
7、2character,tosupportalltheGB2312standardASCIIcharactersandcharactersoftheshow.Becauseserialtransmissionused,sothatthesystemcanbeenhancedscalability,foranumberofdisplayunitsofthecascade.ThisarticlefromthestartLEDdisplayprinciple,elaboratedontheLEDdisplaydynamicproc
8、ess,aswellashardwarecircuitdesign,computingandsoftwarealgorithms.KeyWords:MCU;SerialDataTransfer;LlatticeLlibrary31河南工業(yè)職業(yè)技術(shù)學(xué)院畢業(yè)論文目錄引言51LED概述61.1LED電子顯示屏