毕业论文(终极版)

毕业设计（论文）

基于LED的广告点阵显示设计

学 院： 信息学院 专 业： 自动化 姓 名： 陈灿展 学 号： 110104031010 指导老师： 职 称： 实验师 齐连众

中国·珠海 二○一五年六月

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本人郑重承诺：本人承诺呈交的毕业设计《基于led的点阵广告屏设计》是在指导教师的指导下，独立开展研究取得的成果，文中引用他人的观点和材料，均在文后按顺序列出其参考文献，设计使用的数据真实可靠。

本人签名： 陈灿展 日期： 2015 年 6 月 6 日

基于Led广告显示器的设计

摘 要

LED显示屏是新世纪很关键的信息传播媒体，在多个行业都有着关键的运用。很多超市外表装修、银行滚动提示屏、火车站售票点等，LED显示屏都无处不在。LED显示屏最常见的结构，有的产品一出厂，厂家已经把资料固定在里面，这样设计价格相对比较低也比较精简。也有着电子屏已经有预留读写口，用户购买之后，可以根据自己的需要，按照说明说灵活地修改自己需要的内容，让LED显示屏更具灵活通用性。

关键词：AT89C52、LED矩阵显示屏、单片机

Design of Led advertising display based on

Abstract

LED display is information media is the key of the new century, has a key to use in a variety of industries. Many supermarkets appearance decoration, bank rolling screen prompts,train station ticket points, LED displays are everywhere. The most common structure of

LED

display

screen, some products factory, manufacturers have fixed

material inside, so the design relatively low price is also more streamlined. Also has an electronic screen hasreserved the read-write port, the user after the purchase, can according to their own needs, in accordance with the instructions that modify the contents of their own needs, letLED display more flexible and universal.

Keywords: AT89C52, LED matrix display, microcontroller

目录

1 前言 .............................................................................................................................................. 6

1.1本设计的目的、意义及应达到的技术要求 ..................................................................... 6 1.2本设计在国内外的发展概况及存在的问题 ..................................................................... 6 1.3本设计应解决的主要问题 ................................................................................................. 7 2本设计............................................................................................................................................ 7

2.1设计原理 ............................................................................................................................. 7

2.1.1单片机系统及其外围电路 ...................................................................................... 8 2.1.2行驱动电路 .............................................................................................................. 8 2.1.3列驱动电路 .............................................................................................................. 9 2.2主要元器件介绍 ................................................................................................................. 9

2.2.1 8×8的点阵led的结构 ............................................................................................ 9 2.2.2 74LS595芯片介绍 ............................................................................................. 10 2.2.3 74LS164芯片介绍 ................................................................................................ 11 2.2.4 AT89C52芯片介 ................................................................................................... 12 2.2.5 单片机的最小系统 ............................................................................................... 13 2.3 程序 .................................................................................................................................. 14

2.3.1 显示驱动程序 ....................................................................................................... 14 2.3.2 LED的显示方式 ................................................................................................... 14 2.3.3系统主程序 .......................................................................................................... 16 2.4 调试以及性能分析 .......................................................................................................... 17

2.4.1硬件调试 ................................................................................................................ 17 2.4.2软件调试 ................................................................................................................ 17 3 结论 ............................................................................................................................................ 18 参考文献......................................................................................................................................... 19 谢 辞 ............................................................................................................................................ 20 附 录 ............................................................................................................................................ 21