毕业设计（论文）-图形在电子显示屏上实现的设计.doc

图形在电子显示屏上实现的设计
摘要
电子显示屏的应用范围越来越广泛,它作为一个重要的宣传平台,已经受到全社会的普遍认可,本设计采用单片机为控制核心,通过8*8LED电子显示屏及相关的外围电路,设计制作了一个16*16点阵LED电子显示屏。
本文主要内容是基于单片机控制LED点阵显示屏的设计方案,阐述了16*16点阵LED显示屏的设计原理与思路,详细叙述了系统硬件、软件的具体实现过程,本论文重点阐述了显示模块及相关驱动模块等模块化设计思路与制作方法。主要是以美国ATMEL公司生产的40脚单片机AT89S52为核心,利用AT89S52单片机作为控制器件,采用74HC154和74HC595设计一个16*16的LED点阵的显示屏。介绍了以它为控制系统的LED点阵电子显示屏的设计和开发过程。通过该芯片控制一个行驱动器74HC154和列驱动器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***像,全屏只能显示1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。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点阵显示电路的硬件设计思路、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。主要包括了LED点阵显示模块硬件结构、点阵显示屏原理图、循环扫描过程、字模编码的提取、编程流程图、Keil C51部分程序以及试验结果。通过对点阵显示屏的硬件设计和软件设计,使得该系统可显示出简单的图像,并且无闪烁,还能通过按键进行图形的切换,基本符合设计要求,特别是本系统中LED显示屏的内容可以通过PC进行实时修改,实时显示。通过软硬件加强设计,使得系统能够稳定工作,提高其抗干扰能力。
关键词:LED显示屏,16*16点阵,AT89S52单片机
Design of graphic in the electronic display
Abstract
Electronic display more and more extensive range of applications, it is important as munications platform, has been widely recognized by the whole society, this design uses the microcontroller as the control center by 8 * 8LED electronic display and related peripheral circuits, design a 16 * 16 dot matrix LED electronic display.
The main contents are based on microcontroller design LED dot matrix display, described LED 16 * 16 dot matrix display design principles and ideas, described in detail the system hardware and software realization process, this paper focuses on the display modules and related modules, such as modular drive design ideas and production methods. Produced mainly in the United States, 40 feet ATMEL AT89S52 microcontroller core, using AT89S52 microcontroller as a control device, using 74HC154 and 74HC595 design a 16 * 16 LED dot matrix display. Introduced for the control system for its electronic display LED dot matrix design and development process. The chip is controlled by a row driver and column driver 74HC595 74HC154 to drive the display shows. The electronic display can display a variety of text or monochrome images, full scre