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第一页16×16点阵LED电子显示屏的设计The16×16latticeLEDelectrondisplaymonitordesign摘要第二页本设计是一16×16点阵LED电子显示屏的设计。整机以美国ATMEL公司生产的40脚单片机AT89C51为核心，介绍了以它为控制系统的LED点阵电子显示屏的动态设计和开发过程。通过该芯片控制一个行驱动器74HC154和两个列驱动器74HC595来驱动显示屏显示。该电子显示屏可以显示各种文字或单色图像，全屏能显示1个汉字，采用16*16点阵LED显示模块来组成16×16点阵显示模式。显示采用动态显示，使得图形或文字能够实现静止、移入移出等多种显示方式。文中详细介绍了LED点阵显示的硬件设计思路、硬件电路各个部分的功能及原理、相应软件的程序设计，以及使用说明等。单片机控制系统程序采用单片机汇编语言进行编辑，通过编程控制各显示点对应LED阳极和阴极端的电平，就可以有效的控制各显示点的亮灭。所显示字符的点阵数据可以自行编写（即直接点阵画图），也可从标准字库中提取。LED显示以其组构方式灵活、显示稳定、功耗低、寿命长、技术成熟、成本低廉等特点在车站、证券所、运动场馆、交通干道及各种室内/外显示场合的信息发布，公益宣传，环境参数实时，重大活动倒计时等等得到广泛的应用。经实践证明，该系统显示误差小，性能稳定，结构合理，扩展能力强。关键词：AT89C51单片机；LED；点阵显示；动态显示；汇编语言。第三页AbstractThisdesignisa16×16latticeLEDelectrondisplaymonitordesign.Thewholeequipmentiswiththe40-pinAT89C51MCU(MicroControllerUnit)producedbytheAmericanATMELcompanyatthecore,introducedtakeitasthecontrolsystemLEDlatticeelectrondisplaymonitordynamicdesignandthedevelopmentprocess.Controlsgooddriver74HC154andtworowdriver74HC595throughthischipactuatesthedisplaymonitordemonstration.Theelectronicscreencanshowallkindsofwrittenormonochromeimages,onefullscreendisplayChinesecharacters,fourpiecesof8×8dot-matrixLEDdisplaymodulestoformthe16×16dotmatrixdisplaymode.Showdynamicshowthatmakesstaticgraphicortextcanbeachieved,shiftedoutofvariousformats.ThispaperdescribesthehardwaredesignoftheLEDdotmatrixdisplay,andtheprinciplefunctionofthevariouspartsofthecircuit,thecorrespondingsoftwareprogramdesignandtheuseofsomesuch.SCMprocesscontrolsystemusedforeditingMCUassemblylanguage,ProgrammingcontrolpointsindicatedbythecorrespondingLEDanodeandovercastextremelevel.Wecaneffectivelycontrolthedefenseshowedbrightspots.Thelatticedatashowscharacterscanpreparethemselves(thatis,directlatticePainting),whichcanalsobeextractedfromthestandardfont.LEDdisplaywithfabricmeansflexibility,stability,lowpowerconsumption,longlife,maturetechnology,low-costfeaturesatthestation,securities,sportsvenues,transportationcorridorsandvariousindoor/disseminationofinformationonforeignshowsoccasions,goodpublicity,real-timeenvironmentalparameters,etc.countdownmajoractivitiesarewidelyused.Asthepracticeproves,thesystempossessesadvantagesinlowshowserrors,stable,rationalstructureandstrongextensibleabilities.Keywords:AT89C51MicroControllerUnit；LED；Latticedisplay；Dynamicdisplay；Assemblylanguage.第四页目录摘要.................................................................................................................................一ABSTRACT..................................................................................................................三第一章前言.................................................................................................................六第二章系统整体设计方案.........................................................................................七2．1需要实现的功能...............................................................................................七2．2LED显示特点..................................................................................................七2．3设计方案论证...................................................................................................八2．3．1显示模式方案.......................................................................................八2．3．2数据传输方案.......................................................................................九第三章系统硬件部分设计.........................................................................................十3．1电源设计...........................................................................................................十3．2单片机系统及外围电路...............................................................................十一3．2．1单片机的选择...................................................................................十一3．2．2AT89C51芯片介绍...........................................................................十一3．2．3单片机系统外围电路.......................................................................十四3．3列驱动电路...................................................................................................十五3．4行驱动电路...................................................................................................十七3．4．1行驱动芯片74HC154介绍.............................................................十七3．4．2行驱动电路.......................................................................................十九3．5LED显示屏电路..........................................................................................二十第四章系统软件部分设计.................................................................................二十三4．1系统主程序...............................................................................................二十三第五页4．2显示驱动程序...........................................................................................二十四第五章调试及性能分析.....................................................................................二十六5．1软件调试...................................................................................................二十六5．2硬件调试...................................................................................................二十六5．3性能分析....