合肥师范学院 2016 届本科生毕业论文（设计）本科生毕业论文（设计）题目：基于单片机的动态电子广告牌设 计学 院 电子信息工程学院 学科门类 工 学 专 业 电子信息工程 学 号 姓 名 指导教师 合肥师范学院 2016 届本科生毕业论文（设计）I摘摘 要要动态电子广告牌是一种基于 LED 的显示屏。基于 LED 的显示屏是由几十-几十万个LED 像素点均匀排列组成。它是一种通过控制 LED 的显示方式，用来显示字符、图形、图像、视频等各种信息的显示屏幕。LED 显示屏可分为图文显示屏与视频显示屏，均由 LED 矩阵模块组成。图文显示屏可与计算机通信并同步显示各种字符；视频显示屏采用微机控制技术，图文并茂，以实时、同步、清晰等特点播放各种信息，还可显示录像、电视、动画以及现场实况。LED显示屏所显示画面色彩鲜艳亮丽，立体感强，广泛应用于商场、宾馆、医院、车站、码头、机场、银行、证券市场、建筑市场等公共场所。LED 显示屏具有如下特点：1.可实现超高密度；2.混色好；3.可靠性能强；4.可视角度大；5.通透性高；6.亮度高等。LED 显示屏可以动态显示数字、文字、图像；可以广泛应用于室内外环境，是投影仪、液晶屏无法比拟的。LED 具有：工作电压低、功耗小、寿命长、耐冲击等特点，故 LED 显示屏功耗低，性能稳定。关键词关键词：LED 半导体发光二极;单片机；串并行通信合肥师范学院 2016 届本科生毕业论文（设计）IIAbstractDynamic electronic billboard is a based on LED display. Based on LED display is composed by the dozens, hundreds of thousands of LED pixels are evenly arranged. It is a kind of control led by the display, to display characters, graphics, images, video and other information on the display screen.LED display can be divided into graphic display and video display, are composed of LED matrix module, graphic display can and computer communication and synchronous display a variety of characters; computer control technology is adopted in the video display, illustrations, in real-time, synchronization, the characteristics of clear play each kind of information, also can display the video, television, animation and live, LED display shows screen bright color, three-dimensional sense of strong, widely used in shopping malls, hotels, hospitals, railway stations, wharves, airports, banks, securities market and building market in public places.LED display has the following characteristics: 1 to achieve ultra-high density; 2 mixed color good; 3 reliable performance; 4 visual angle of view; 5 high permeability; 6 brightness.LED display can dynamically display numbers, text, images; can be widely used in indoor and outdoor environment, is the projector, LCD screen can not match.LED has the characteristics of low operating voltage, low power consumption, long service life, impact resistance, etc. Therefore, the LED display has low power consumption and stable performance.Key Words: LED semiconductor light emitting diode; MCU; Serial parallel communication合肥师范学院 2016 届本科生毕业论文（设计）0目 录摘摘 要要.I Abstract.II 目目 录录.III 1. 引言引言.1 1.1 课题的背景及意义.1 1.2 国内外研究现状及趋势.1 1.3 任务分析与实现.2 2. 硬件设计硬件设计.2 2.1 硬件电路总体设计方案.2 2.2 单片机原理及应用.3 2.2.1 STC89C52 单片机特点.3 2.2.2 STC89C52 单片机管脚说明.4 2.3 单片机系统电路设计.6 2.3.1 时钟电路.6 2.3.2 复位电路.6 2.3.3 切换按键电路设计.7 2.3.4 行驱动电路设计.7 2.3.5 列驱动电路设计.8 2.4 LED 点阵屏设计 .8 2.5 硬件电路原理图.10 3. 软件设计软件设计.10 3.1 编程语言介绍.11 3.2 程序流程图.11 3.3 子程序设计.11 3.3.1 中断服务程序设计.11 3.3.2 显示程序设计.