摘 要本文介绍了一款以单片机 AT89S51 为控制器的 LED 点阵显示屏系统的设计. 该系统 可实现中英文字符的显示和动态特效显示,采纳上 —下位机的结构构建,实现点阵 LED 屏以多样化的方式显示各种信息的功能。该屏具有运行可靠、安全、节能、成本低、使 用方便的特点。 并且可以通过级连的方式来扩大显示屏幕的尺寸以达到增加显示内容的 目的.系统采纳 PC 机作为上位机,上位机向单片机发送控制命令和上位机所存储的显 示代码, AT89S51 单片机接收并处理 PC 机的控制命令以及显示代码, 由显示驱动模块驱 动一个 16×16 分辨率的 LED 点阵显示屏的扫描显示。 PC 机与单片机之间的通信采纳 RS — 232C 通信标准来实现. 所选用的 AT89S51 单片机具有价格低廉程序写入方便的特点使 得整个系统方便维护和检修.除此之外,该系统只占用了单片机少量的 I /O 口和内存, 为系统留下了功能扩展的空间.关键词 :AT89S51 LED 点阵显示 串行通信AbstractThis paper introduces a design of the LED lattice display system base on MCU AT89S51。 The system can display in both Chinese and English characters of the show and from top to bottom and move around the magic show. And can be cascaded to expand the screen size to achieve increased content purposes。 The PC sends control commands and displays code to microcontroller, A T89S51 receives control commands from PC and shows the code, Driver module drives a 16×16—resolution LED lattice LED's panel display scan showed。 Communication between PC and the microcontroller using RS-232C communications standards. the characteristics that AT89S51 microcontroller is cheap and could be coded conveniently makes the whole system Convenient to Maintenance and Repair. In addition, the system will take up only a small amount of the MCU I/O and memory ,so that the system has functional space for expansion.KEY WORDS: A T89S51 lattice LED’s panel display, serial communication目 录第一章 绪 论 。 。。.。..。。。.。。。。。....