基于AT89C51单片机的16×16点阵LED电子显示屏设计20.doc

黄石理工学院
HUANGSHI INSTITUTE OF TECHNOLOGY
毕业论文


设计题目:16×16点阵LED电子显示屏
学号: 043025249
学生姓名:潘恒斐
指导教师:江玲
所在院系:电气与电子信息工程学院
所学专业:电子信息技术
基于AT89C51单片机的16×16点阵LED电子显示屏设计
摘要
本设计是一16×16点阵LED电子显示屏的设计。整机以美国ATMEL 公司生产的40脚单片机AT89C51为核心,介绍了以它为控制系统的LED点阵电子显示屏的动态设计和开发过程。通过该芯片控制一个行驱动器74HC154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1个汉字,采用4块8 x 8点阵LED显示模块来组成16x16点阵显示模式。显示采用动态显示,使得图形或文字能够实现静止、移入移出等多种显示方式。文中详细介绍了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,以及使用说明等。
单片机控制系统程序采用单片机汇编语言进行编辑,通过编程控制各显示点对应LED阳极和阴极端的电平,就可以有效的控制各显示点的亮灭。所显示字符的点阵数据可以自行编写(即直接点阵画图),也可从标准字库中提取。
LED显示以其组构方式灵活、显示稳定、功耗低、寿命长、技术成熟、成本低廉等特点在车站、证券所、运动场馆、交通干道及各种室内/外显示场合的信息发布,公益宣传,环境参数实时,重大活动倒计时等等得到广泛的应用。
设计结果证明,该系统显示误差小,性能稳定,结构合理,扩展能力强。
关键词:AT89C51单片机; LED; 点阵显示; 动态显示;汇编语言。
Abstract
This design is a 16 ×16 lattice LED electron display monitor design.
The whole equipment is with the 40-pin AT89C51 MCU (Micro Controller Unit) produced by the American pany at the core, introduced take it as the control system LED lattice electron display monitor dynamic design and the development process. Controls good driver 74HC154 and two row driver 74HC595 through this chip actuates the display monitor demonstration. The electronic screen can show all kinds of written or monochrome images, one full screen display Chinese characters, four pieces of 8 x 8 dot-matrix LED display modules to form the 16x16 dot matrix display mode. Show dynamic show that makes static graphic or text can be achieved, shifted out of various formats. This paper describes the hardware design of the LED dot matrix display, and the principle function of the various parts of the circuit, the corresponding software program design and the use of some such.
SCM process control system used for editing MCU assembly language, Programming control points indicated by the corresponding LED anode and overcast extreme level. We can effectively control the defense showed bright spots. The lattice data shows characters can prepare themselves (that is, di