I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色图像，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IIDesign of graphic in the electronic display AbstractElectronic display more and more extensive range of applications, it is important as a communications 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 screen can only display a character, using four 8 * 8 dot matrix LED display module to form a 16 * 16 dot matrix display mode. Display dynamic display, making the graphics or text to achieve stationary, moved out of the other display. Described in detail the hardware LED dot matrix display circuit design ideas, the function of various parts of the hardware circuit and the principle, the corresponding software program design and the use of descriptions. Including the LED dot matrix display module hardware, dot matrix display schematic, circular scanning process, the extraction font encoding, programming flowcharts, Keil C51 part of the program, and test results. Dot matrix display on the hardware design and software design, making the system can display a simple image, and no flicker, but also through the button to switch the graphics, basic design requirements, in particular, the system LED display real-time content can be modified through the PC, real-time display. Through hardware and software to strengthen the design, making the system work to stabilize and enhance its anti-jamming capability. Key words：led display , 16*16 lattice , AT89S52 MicrocontrollerIII目 录第 1 章 绪论 .111 引言 .112 研究背景 .113 LED 显示屏的现状及发展趋势 .1131 LED 显示屏的现状 .1132 LED 显示屏的发展趋势 .2133 LED 显示屏发展存在问题 .414 主要研究内容 .5第 2 章 系统的设计方案 .621 系统总体设计方案 .622 显示部分方案的选择 .723 与 PC 机通信电路方案的选择 .724 电源电路方案的选择 .8第 3 章 系统控制器件的选择及其软件的使用 .931 系统控制器件的选择 .