基于AVR单片机的点阵屏系统的设计与仿真 毕业设计论文.doc

毕业设计（论文） 题 目 基于AVR单片机的点阵屏 系统的设计与仿真 专 业 电子信息科学与技术 班 级 电技072班 学 生 指导教师 2011 年 摘 要 本设计是一16×16点阵LED电子显示屏的设计。以美国ATMEL 公司生产的40脚单片机A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。通过该芯片控制个行驱动器 74HC和两个列驱动器74HC5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8×8点阵LED显示模块来组成16×16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） 经实践证明，该系统显示误差小，性能稳定，扩展能力强。Abstract This design is a 16 ×16 lattice LED electron display monitor design.The whole equipment is with the 40-pin Atmega16 MCU (Micro Controller Unit) produced by the American ATMEL company at the core, introduced take it as the control system LED lattice electron display monitor dynamic design and the development process. Controls two good driver 74HC573 and two row driver 74HC573 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 8×8 dot-matrix LED display modules to form the 16×16 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 C 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, direct lattice Painting).As the practice proves, the system possesses advantages in low shows errors, stable,and strong extensible abilities. Keywords: Atmega16 M