摘要本设计用AT89C51系列的高速单片机作为主控制模块，利用简单的外围电路来驱动64×16的点阵LED显示屏。同时，也可在嵌入式系统软件硬件设计仿真平台Proteus基础上设置了16×16LED点阵汉字显示电路。使用AT89C51系列的高速单片机本身的功能，很方便的实现单片机和PC机之间的数据存储及传输，一方面可利用软件进行显示内容的多样化，另一方面点阵可显示屏，广泛的应用于医院、机场、银行等公共场所，所以本设计具有很强的实际应用性。LED显示屏可用动态扫描的方式同时显示4个16×16点阵汉字，也可通过上位机软件修改显示的内容和显示的效果等等。把字符内码存储在空闲的单片机程序存储器空间，使本LED显示系统能掉电存储1024个字符。设计中采用了SPI接口的GB2312标准字库，支持所有的国字符和ASCII标准字符的显示。因为采用串行传输方式，所以使本系统的可扩展性得到提升，有利于多个显示单元的级联。通过汉字字模点阵数据的生成软件进行，实现汉字点阵的效果,同时应用汇编语言对单片机进行了控制性的操作。也完成了实物电路，并在Proteus软件基础上对结果仿真,得到了汉字点阵效果图。关键词:动态显示单片机点阵字库AbstractThisdesignwithAT89C51seriesofmicroprocessorasthemaincontrolmodule,usetheperipheryofthesimplecircuittodrivethe64x16matrixLEDdisplay.Atthesametime,alsocanbeinembeddedsystemsoftwareandhardwaredesignsimulationplatformbasedonProteusset16×16ofLEDdotmatrixcharactersdisplaycircuit.UsethemicroprocessoritselfAT89C51seriesoffunction,veryconvenientrealizebetweenSCMandPCofdatastorageandtransmission,ontheonehand,canusesoftwareshowingthecontentsofthediverse,ontheotherhandbitmapcandisplay,widelyusedinhospitals,airports,Banksandotherpublicplaces,sothisdesignwhichisofgreatpracticalapplication.TheLEDdisplaydynamicscanningwaycanalsoshowedfour16×16dotmatrixcharacters,canalsobethroughthePCsoftwaremodifythecontentoftheshowandshowtheeffectoftheandsoon.Thecharacterencodingstoredinfreemicrocontrollerprogrammemoryspace,maketheLEDdisplaysystemcanpowerloststorage1024characters.AppliedtothedesignoftheinterfacestandardGB2312SPIdictionaries,supportforallofthecountriesandASCIIcharactersofcharactersthatstandard.Becausetheserialtransmissionway,sothatthesystemscalabilitygetpromoted,behelpfulformoredisplayunitcascade.ThroughtheChinesecharactersfontdotmatrixofdatageneratedsoftware,achievetheeffectofdotmatrixcharacters,andapplicationoftheMCUassemblylanguagecontrollingoperation.Alsocompletedtherealelectriccircuit,andProteussoftwareinbasedontheresultsofsimulation,thedotmatrixcharactersgetdepicted.Keywords:dynamicdisplay;Singlechipmicrocomputer;Bitmapfonts目录1LED概述......................................................51.1LED电子显示屏的基本概述..................................51.2LED电子显示屏的分类......................................72显示原理及控制方式分析........................................82.1LED点阵模块结构..........................................82.2LED的基本知识............................................92.3LED的动态显示原理........................................113硬件电路设计.................................................123.1系统硬件概述.............................................123.216×16LED点阵显示制作..................................143.2.116×16LED点阵的内部结构及工作原理...................143.2.2用8×8LED点阵构成16×16LED点阵......................163.3AT89C51的接口说明........................................173.4LED硬件原理图...........................................204字模的生成...................................................224.1字模简...
