基于51单片机的动态点阵LED汉字显示屏的设计-毕业论文

基于51单片机的动态点阵LED汉字显示屏的设计摘要LED点阵显示屏是利用发光二极管点阵模块或像素单元组成的平面式显示屏幕，可以显示汉字、数字或特殊符号，通常用来显示时间、速度、系统状态等。LED点阵显示屏作为一种新兴的显示器件,现已广泛应用于广告、交通运输、教育系统、银行等工业企业管理和其它公共场所,产业面临良好的市场发展机遇及前景。本设计研究了基于单片机AT89C51的8×8点阵LED动态显示屏的设计与运用Proteus软件的仿真实现。具体介绍了设计的系统方案、LED图形显示原理及应用、LED汉字显示屏的硬件电路设计、汇编程序设计与调试、Proteus软件仿真，软件流程图等内容。本设计主要以AT89C51为核心芯片，通过程序控制，采用动态扫描技术，用AT89C51的P0口控制行驱动器74LS245和P3口来直接驱动显示屏，在点阵LED显示屏上实现了汉字的动态显示。在负载范围内,只需通过简单的级联就可以对显示屏进行扩展，来制作一款拥有多功能模块化的点阵LED的多功能显示屏，是一种成本低廉的图文显示方案。关键词：AT89C51单片机；LED点阵；动态扫描；Proteus仿真软件DynamicdotmatrixLEDChinesecharactersdisplaydesignBasedon51Micro-controllerABSTRACTLEDdotmatrixdisplaytisPlanardisplayscreenwhichiscomposedoflight-emittingdiodedotmatrixmoduleorpixelunit.LEDdotmatrixdisplaycandisplayChinesecharacters,numbers,orspecialsymbols,usuallyareusedtodisplaytime,speed,andsystemstatus.LEDdotmatrixdisplayisanewdisplaydevices,whichiswidelyusedinadvertising,transport,educationsystem,banksandotherindustrialenterprisesandotherpublicplacesnow,andtheindustryisfacinggoodopportunitiesformarketdevelopmentandprospects.Thedesignstudiesthatthe8×8dotmatrixLEDdynamicdisplaydesignbasedonAT89C51Micro-controllerandusingProteussoftwaretosimulate.Specificallydesignedsystemsolutions,LEDgraphicdisplayprincipleandapplicationofLEDChinesecharactersdisplayhardwarecircuitdesign,assemblerprogramminganddebugging,Proteussoftwaresimulation,softwareflowchart.ThisdesignregardstheAT89C51asthecorechip,usesAT89C51theP0porttocontrollinedrivethe74LS245andP3portstodirectlydrivethedisplaybytheprogramcontrollinganddynamicscanningtechnology,ChinesecharactersistobeDynamicdisplayedonadotmatrixLEDdisplay.Intheloadrange,displaycanbeextendedjustbyasimplecascade,tocreateamultifunctionaldisplaywhichhasamultifunctionalmodularLEDdotmatrix,anditisalow-costgraphicdisplayprogram.Keywords:AT89C51Micro-controller;LEDdotmatrix;Dynamicscanning;Thesimulationsoftwareofproteus目录TOC\o"1-3"\h\u15396１绪论 附录 RS_CNT EQU 30HNUMEQU31HTCON_T EQU 32H ORG 00HLJMPSTARTORG 0BHLJMPINT_T0START: MOV RS_CNT,#00H MOV NUM,#00H MOV TCON_T,#00HMOVTMOD,#01HMOVTH0,#(65536-5000)/256;定时5MSMOVTL0,#(65536-5000)MOD256MOVIE,#82HSETBTR0SJMP$;等待中断INT_T0:MOVTH0,#(65536-5000)/256MOVTL0,#(65536-5000)MOD256MOVDPTR,#TABLEMOVA,RS_CNT;取列码MOVCA,@A+DPTRMOVP3,A;显示列码MOVDPTR,#TABLE1MOVA,NUM;取行码MOVB,#8MULABADDA,RS_CNTMOVCA,@A+DPTRCPLA;取反MOVP0,A;显示行码INCRS_CNTMOVA,RS_CNTCJNEA,#8,NEXTMOVRS_CNT,#00HNEXT:INCTCON_TMOVA,TCON_TCJNEA,#200,RETUNE;每个字显示1sMOVTCON_T,#00HINCNUMMOVA,NUMCJNEA,#7,RETUNEMOVNUM,#00HRETUNE:RETITABLE:DB080H,040H,020H,010H,008H,004H,002H,001HTABLE1:DB00H,03H,7DH,55H,0FFH,54H,7CH,00H;电DB06H,02H,4EH,68H,68H,0E8H,48H,20H;气DB7EH,4AH,7AH,42H,72H,4AH,7EH,00H;四DB54H,7CH,54H,0FCH,12H,54H,7CH,54H