学位论文-—基于单片机的点阵显示系统设计.doc

毕业设计（论文） 题 目： 基于单片机的点阵显示系统设计 学 院： 电子信息学院 专业班级： 自动化2012级2班 指导教师： 职称： 副教授 学生姓名： 学 号： 摘 要 伴随着科技的进步，LED点阵显示屏作为一种新兴的显示器件走进我们的视野，它是由多个独立的LED发光二极管封装而成。通过LED点阵显示屏可以显示数字、符号以及文字，通常用在广告，指示牌，公告牌上。 LED 点阵是集微电子技术、计算机技术、信息处理技术于一体的大型显示屏系统。它以其色彩鲜艳，动态范围广，亮度高，寿命长，工作稳定可靠等优点而成为众多显示媒体以及户外作业显示的理想选择。 ABSTRACT With the progress of science and technology, LED dot matrix display, which is packaged from multiple independent LED light-emitting diodes, as an emerging display device has come into our field of vision. Because LED dot matrix display can display numbers,symbols and words, it usually used in advertising, signage and bulletin board. Electronic LED dot matrix display is a large system which joins microelectronics technology, computer technology,information processing technology. It has become ideal option for the show of many media and outdoor activities because of the merits of bright colors, wide dynamic range, high brightness, long life, stable and reliable work. This design is a design of 16*16 dot matrix display screen based on STC89C52 microcontroller, which is responsible for overall control of entire system, it uses 4 pieces of 8*8 single red dot matrix screen to form a 16*16 dot matrix screen, the line of lattice is controlled by a transistor, and the column of lattice is controlled by the cascading of two-piece 74LS595 with the function of turn serial input into eight parallel output, it displays the details we need by dynamic frequently refresh, which reaches the purpose of dynamic display. KEYWORDS: dot matrix, single-chip, decoder, dynamic scan目 录 第1章 绪 论 1 1.1 课题的研究背景 1 1.1.1 LED电子显示屏概述 1 1.1.2 LED电子显示屏的分类 2 1.1.3 设计任务 2 1.1.4 设计目的 3 1.2 MCS-51系列单片机简介 3 1.2.1 MCS-51单片机特点 3 1.2.2 单片机的发展历史简介 3 第2章 总体设计的方案研究 5 2.1 显示单元的选择 5 2.2 滚屏方式选择 5 2.3 关于屏幕的可扩展性 5 2.4 单片机控制器的考虑 6 2.5 关于点阵数据的存储方式 6 第3章 硬件电路设计 7 3.1 整体设计框图 7 3.2 主控电路 7 3.2.1 STC89C52单片机简介 7