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本科毕业设计(论文)题目：基于单片机的LED汉字滚动显示器设计教学单位：工程技术系专业：电子信息工程学号：0912070130姓名：张春怀指导教师：赵永岐2013年5月I摘要LED已成为一个高速发展的新兴产业，前景广阔。该设计介绍了基于单片机AT89S52的16×16点阵LED汉字滚动显示屏的设计。其中重点介绍了LED点阵显示的硬件设计、硬件电路各部分的功能和原理、相应软件的程序设计，及详细的使用说明和工作流程。该设计分为六部分，其中主要内容为系统总体分析，系统硬件设计，系统软件设计三部分。系统总体分析是该设计的基础；系统硬件设计是该论文的关键及核心部分，首先该部分简单描述系统硬件的工作原理，且附上系统硬件设计框图，论述了该设计所应用的各硬件接口技术和各个接口模块的功能及工作过程；软件设计是系统运行必不可少的部分。本设计主要是软、硬件相结合，以硬件为基础，来进行各功能模块的设计。本设计实用性强、操作简单、扩展功能强。本显示屏的设计具有体积小、硬件少、电路结构简单及容易实现等优点。关键词：单片机；LED；点阵；汉字显示IIAbstractLEDhavebecomeahighspeeddevelopmentofemergingindustries,andbroadprospects.ThedesignbasedonsinglechipmicrocomputerAT89S52wasintroduced16*16latticeLEDscrollingdisplayofChinesecharactersdesign.WhichfocusonLEDdotmatrixdisplaythefunctionsofthepartsofthehardwaredesign,hardwarecircuitandtheprincipleandthecorrespondingsoftwareprogramdesign,anddetaiLEDinstructionsandworkprocesses.Thedesignisdividedintosixparts,includingthemaincontentforthesystemoverallanalysis,thesystemhardwaredesign,systemsoftwaredesignthreeparts.Systemoverallanalysisisthefoundationofthedesign;Systemhardwaredesignisthekeyandcorepartofthepaper,firstofall,thispartsimplydescribedtheworkingprincipleofthesystemhardware,andattachasystemblockdiagramofhardwaredesign,thedesignisdiscussedtheapplicationofthehardwareinterfacetechnologyandthefunctionofeachinterfacemoduleandworkingprocess;Softwaredesignisacrucialpartofthesystemisrunning.Thedominantideaofthedesignisacombinationofsoftwareandhardware,onthebasisofhardware,designofeachfunctionmodule.Thisdesignandstrongpracticability,simpleoperation,strongextendedfunctionality.Thisdisplaydesignwithsmallsize,lesshardware,circuitstructureissimpleandeasytoimplement,etc.Keywords:MCU;LED;Lattice;ChinesecharacterdemonstratesIII目录第1章绪论.........................................................................................................................................11.1本课题的研究意义及必要性......................................................................................................11.2LED的现状和发展趋势..............................................................................................................11.3LED的参数及特点......................................................................................................................2第2章系统总体分析.............................................................................................................................42.1设计目标及采取的方案..............................................................................................................42.2工作原理......................................................................................................................................52.3总体设计......................................................................................................................................5第3章系统硬件设计.............................................................................................................................73.1单片机处理模块..........................................................................................................................73.2行驱动模块................................................................................................................................103.3列驱动模块................................................................................................................................123.4LED点阵显示模块....................................................................................................................143.4.1LED点阵显示方案............................................................................................................143.4.2LED点阵原理....................................................................................................................153.4.3汉字显示原理.....................................................................................................................17第4章系统软件设计...........................................................................................................................194.1主程序设计................................................................................................................................194.2显示子程序设计........................................................................................................................204.3移位子程序设计........................................................................................................................21第5章系统调试及性能分析.............................................................................................................235.1复位电路的调试与改进............................................................................................................235.2驱动电路的调试与改进............................................................................................................235.3上拉电阻的调试与改进............................................................................................................235.4总体性能分析............................................................................................................................24结论...........