ARM芯片控制LED显示屏

湖南大学毕业设计(论文)第I页基于ARM的LED显示屏的控制系统的设计与实现摘要近年来，LED(lightemitingdiode，发光二极管)显示屏作为一种高科技产品日益引起人们的重视。它可以实时显示或循环播放文字、图形和图像信息，具有显示方式丰富、观赏性强、显示内容修改方便、亮度高、显示稳定且寿命长等多种优点，被广泛应用于商业广告、体育比赛、交通信息报导等诸多领域.LED显示屏的核心技术主要集中在控制器中。目前，大部分异步显示屏采用的是8位或16位的微控制器，由于受到微处理器的处理速度、体系架构、寻址范围、外围接口资源等诸多限制，已难以在要求显示较多像素、显示内容帧频较高、动态显示效果复杂的情况下得到良好的动态视觉效果。针对以上情况，本文研究开发了一种全新的，由32位高性能ARM微处理器组成的LED显示屏控制系统，就控制平台、硬件结构和软件开发实现给出了驱动部分和控制部分的详细分析与设计。关键词：LED显示屏，控制系统，ARM，LPC2294芯片，串口通信，RS232接口湖南大学毕业设计(论文)第II页TheLEDdisplaycontrolsystemdesignandimplementationbasedonARMAbstractLEDpanelsystemsgainsrapiddevelopmentinthedesign,machineandapplicationfromninetiesages.ItwentthorughfromsinglecolorandtwocolorstoimageLEDpanel.Asahightechnologyproduction,LEDpanelcanrealizerealtimeandsequentialdisplayingtextuer,graghicandimages.LEDpanelhasmanyspecialfeaturesuchashighreliability,longlife,highperformance,lowcost,andmoreimportanthighacclimatization.Moreover,withthetechniqueofcolorpanelperfectincreasingly,LEDpaneliswidelyusedinmanyfields.ThecoertechniqeforaLEDpanelismainlycentralizedonitscontorller.Atpresent,themajorityofasynchronousdisplaypanelusethe8orthe16micro-controllers,becausetheprocessingspeed,thesystemconstruction,theaddressingscope,theperipheryconnectionresourcesandsoonmanylimits,inrequestdemonstrationmanypictureelements,thedemonstrationcontentframefrequencyhasbeenwithdificultyhigh,inthedynamicdemonstrationefectcomplexsituation,obtainsthegooddynamicvisualefect.Inviewofabovesituation,Thispaperredesignanddevelopedonekindnewdisplaysystem.Itiscomposedby32highperformanceARMmicroprocessor.Thecontrolplatform,hardwarestructuerandsoftwaerimplementationoftheLEDpanelcontrollerareanalyzedanddesignedKeyWords：LEDpanelsystems，controlsystem,ARM,LPC2294micro-controllers,serialcommunication,RS232serialinterface湖南大学毕业设计(论文)第III页目录1.绪论.........................................................................................................................................11.1LED显示屏的研究现状及发展趋势............................................................................11.2LED显示屏控制系统的研究现状与发展趋势..........................................................31.2.1基于单片机的LED显示屏控制系统.....................................................................31.2.2基于SOPC的LED显示屏控制系统.....................................................................41.3本课题的研究背景及意义...............................................................................................51.4本论文的主要内容..........................................................................................................62LED显示系统的基本原理.................................................................................................72.1LED显示屏....................................................................................................................72.1.1LED显示屏的显示原理........................................................................................72.1.2LED显示屏的驱动原理........................................................................................72.1.3LED显示屏的优点................................................................................................82.2基于ARM的控制板.....................................................................................................92.3串口通信协议..............................................................................................................113.基于ARM的LED显示屏控制系统的总体设计.............................................................133.1整体思路......................................................................................................................133.2芯片选型：..................................................................................................................143.2.1ARM控制模块........................................................................................................143.2.2串口通信模块.........................................................................................................153.2.3LED显示模块.........................................................................................................173.2.4电源模块.................................................................................................................183.2.5时钟模块.................................................................................................................193.3原理简介........................................................................................................................204.系统硬件设计.......................................................................................................................21湖南大学毕业设计(论文)第IV页4.1电源模块的设计............................................................................................................214.2ARM控制模块的设计................................................................................................234.3串口通信模块的设计..................................................................................................264.4LED显示模块..............................................................................................................275系统的软件设计.........