基于单片机的点阵电子显示屏的设计毕业论文.docx

大连海事大学┊┊┊┊┊┊┊装┊┊┊┊┊┊┊订┊┊┊┊┊┊┊线┊┊┊┊┊┊┊毕 业 论 文 二○一四年六月基于单片机的点阵电子显示屏的设计专业班级： 通信工程一班姓 名： 刘维佳 指导教师： 金国华 信息科学技术学院摘 要本文介绍了16×16点阵LED电子显示屏的设计。该电子显示屏可以显示各种文字、数字、字母，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，使得数字、字母或文字能够实现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。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。单片机控制系统程序采用单片机C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。经过系统调试，该设计基本满足要求。关键词：单片机；点阵驱动；点阵显示AbstractThis paper is a 16 ×16 lattice LED electron display monitor design. The electronic screen can show all kinds of written, numbers or letters,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.The whole equipment is with the 40-pin AT89C51 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 good driver 74HC154 and two row driver 74H-C595 through this chip actuates the display monitor demonstration.SCM?process?c-ontrol?system?used?for?editing?MCU?C?language,?Programming?cont-rol?points?indicate-d?by?the?corresponding?LED?anode?and?overcast?extreme?level.?We?c-an?effectively?cont-rol?the?defense?showed?bright?spots.?The?lattice?data?shows?characters?can?prepare?themselves?(that?is,?direct?lattice?Painting),?which?can?also?be?extracted?from?the?standard?fon-t. Through the System debugging,?this design meets the basic ?requirements.Key?words：Micro?Controller?Unit,?Lattice drive,?Lattice?display目 录第一章 绪论11.1 课题背