基于单片机的LED点阵显示屏系统设计.doc

毕 业 设 计（论 文） 题目：基于单片机的LED点阵显示屏系统设计 （英文）：Design of LED Lattice Display System Based On SCM 院 别： 自动化学院 专 业： 电气工程及其自动化 姓 名： 学 号： 指导教师： 日 期： 2012年4月 基于单片机的LED点阵显示屏系统设计 摘要 LED点阵显示屏作为一种新兴的显示器件，现已广泛应用于广告、交通运输、教育系统、银行等工业企业管理和其它公共场所，产业面临良好的市场发展机遇及前景。 本设计是由4个8×8LED点阵组成的电子显示屏设计。整个系统以ATMEL公司生产40脚单片机AT89S52为核心，通过该芯片控制两个行驱动器74HC164和两个列驱动器74HC595来驱动显示屏显示。该电子显示屏可以显示各种文字或单色图像，全屏能显示整个汉字，采用4 块8×8点阵LED显示模块来组成1个16×16点阵显示模式。本设计采用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，AT89S52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。 本论文详细介绍了LED点阵显示的硬件设计思路、硬件电路各个部分的功能及原理、相应软件的程序设计等。 关键词：AT89S52单片机；RS232通讯；LED点阵显示 Design of LED Lattice Display System Based On SCM ABSTRACT As a new kind of display devices, now LED dot matrix display is widely used in advertising, transportation, education system, banks, management of industrial enterprises and other public places, the industry is facing good development of opportunities and prospects of the market. The display system is a design which is made up of four 8 × 8 dot matrix LED displays. The entire system uses the microcontroller is AT89S52, and the microcontroller as the core is made by ATMEL Corporation which has 40 pins .The microcontroller controls two pieces of 74HC164 which is a row drive device and two pieces of 74HC595 which is a column drive device. The electronic display can display varieties of text and monochrome images, the full screen can display the entire Chinese characters. I use four 8 × 8 dot matrix LED displays to form a 16 × 16 dot matrix display module. This design uses a PC and the PC sends the control commands and the display code which is stored in the PC to the microcontroller, the AT89S52 microcontroller receives and processes the control commands and display the code, then the driver module drives a 16 × 16 resolution LED dot matrix display to display something b