LED点阵显示论文.doc

本科毕业论文(设计)
题目: LED点阵广告牌的设计与制作
院系:物电系08级电信(1)班
专业:电子信息科学与技术
姓名:
学号:
指导教师:
教师职称:教授
填写日期:2011 年 12月 20 日
摘要
本设计使用简单单片机AT89C52作为主控制模块,利用简单的外围电路来驱动8×8的点阵广告牌。在本设计中主要用四个74HC595来驱动四个8×8点阵,可以最终实现——“祝您旅途愉快!”七个汉字的自动左移。也就是说,硬件电路大致上可以分成单片机系统及外围电路、驱动电路两个部分。从而可以实现一个简易的八个8×8点阵广告牌,在目测条件下点阵广告牌各点亮度均匀、充足,可显示图形和文字,显示图形或文字应稳定、清晰无串扰,图形或文字显示有移入移出显示方式。最后,利用烧录器可以很方便的实现单片机与PC机等外围存储设备的数据传输,并能利用软件方便的进行显示内容的多样变化,另一方面,LED点阵显示作为一种新兴的显示器件,是由多个独立的LED发光二极管封装而成。LED点阵广告牌可以显示数字或符号, 通常用来显示时间、速度、系统状态等。文章给出的8×8点阵LED广告牌设计方案,包括系统具体的硬件设计方案,软件流程图和相应的C语言程序等方面。在负载范围内, 只需通过简单的级联就可以对广告牌进行扩展,是一种成本低廉的图文显示方案。
关键词:单片机;主控制模块;点阵广告牌;自动左移;外围存储设备;级联
Abstract

This design is simple to use AT89C52 single chip puter as the main control module, use the periphery of the simple circuit to drive the 8 x8 dot matrix billboards. In this design mainly with four 74 HC595 are needed to drive the four 8 x 8 dot matrix, can finally realize-" I wish you a pleasant journey "six Chinese characters to be automatic moves left. That is, the hardware circuit can generally be divided into SCM system and peripheral circuit, drive circuit two parts. And for a simple eight 8 x 8 dot matrix billboards, in the visual conditions dot matrix billboard brightness at every point, enough, can show graphics and text, graphics or text should be stable, clear no crosstalk, graphics or text indicate that the move has removed showing the way. Finally, using the burn can easily achieve SCM and PC periphery storage equipment such as the data transmission, and can use software convenient for showing the contents of the diverse change, on the other hand, of LED dot matrix display as a new kind of display devices, is by the of multiple independent LED light emitting diode encapsulation and into. A billboard of LED dot matrix display Numbers can or symbol, usually used to show time, speed, the system state, etc. The paper gives 8 x8 LED dot matrix design scheme billboards, including the system of concrete hardware design, software flow chart and