单片机控制LED点阵广告牌设计123..doc

本科毕业论文（设计） 题 目：单片机控制LED点阵广告牌设计 系 院： 电子科学与工程系 姓 名： 学 号： 年 级： 专 业： 电子科学与技术 完成日期： 指导教师： 摘 要 近年来随着科技的飞速发展，单片机的应用正在不断的走向深入，同时带动传统控制及LED显示技术日新月异。在控制和LED显示系统中，单片机往往是作为一个核心部件来使用，同其它硬件以及对应软件相结合，实现多种控制机显示要求。LED显示屏是近年来在全球迅速发展起来的新型信息显示媒体，它广泛应用于各个领域。特别是在公共场所，如车站、码头等，进行广告宣传和公益提示。LED显示屏显示原理是先根据所需要显示的汉字提取汉字点阵字库，将点阵文件存入ROM，形成汉字编码；在使用时则根据语句，提取相应的汉字编码进行汉字显示。 本设计由单片机AT89S51的P2口和P0口配合传送数据，P1口通过4线-16线译码器74HC154选择所要显示的列。再由 16X16点阵LED显示器及其他一些外围电路显示点阵式汉字、图形以及动画。其中的汉字编码由PCtoLCD2002应用软件提取。 关键词：单片机；AT89S51；LED点阵；74HC154 Abstract In recent years, with the rapid development of science and technology, MCU applications are continually developing【9】, and romote the traditional control and LED display technology with each passing day. In the control and LED display system, the MCU is often as a core component to use, corresponding with other hardware and software integration, and display a variety of aircraft control requirements. LED display in the world in recent years with the rapid development of the new information shows that the media, which widely used in various fields. Particularly in public places, such as stations, piers, advertising and public interest tips. LED display shows the first principle is the basis of need to show the Chinese characters from Chinese lattice character, the document will be deposited into lattice ROM, a Chinese character coding, when used according to the statement, from the corresponding Chinese character coding for Chinese character display. MCU AT89S51 by the design of the P2 mouth and mouth with P0 transmission of data, P1 through the mouth of 4-16 decoder 74 HC154 choose to be shown out. By 16 X16 LED dot-matrix display and some other external circuit dot-matrix display Chinese characters, graphics and animation. The Chinese character coding software applications from PCtoLCD2002 extraction. Key words: SCM; AT89S51; LED dots; 74 HC154 目 录 1 绪论 1 1.1 单片机应用技术发展状况及发展趋势 1 1.2 单片机的发展对LED广告