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电子信息综合设计类毕业设计论文模板(节选)
作者:admin   发布于:2014-03-09 18:49    文字:【】【】【

摘  要

本文以宏晶公司生产的40脚单片机STC89C52RC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。通过该芯片控制两个行驱动器 74HC138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8×8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。
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。
经实践证明,该系统显示误差小,性能稳定,结构合理,扩展能力强。
 
关键词: STC89C52RC单片机   16×16LED点阵   动态显示

ABSTRACT
Machine production to macro crystal company 40 feet STC89C52RC MCU as the core, introduces the dynamic design and the development of its control system for LED dot matrix display process. The chip control two row driver 74HC138 and two row driver 74HC595 to drive the display. The electronic screen can show all kinds of written or monochrome images, full screen can display 1 Chinese characters, using the display module is composed of 16 * 16 dot matrix display mode 4 pieces of 8 x 8 dot matrix LED. Shows the dynamic display, making static graphic or text can be achieved, moved out of a variety of display. This paper introduces in detail the LED dot matrix display hardware design, hardware circuit of each part of the function and principle, the corresponding software program design, as well as the use and so.
Microcomputer control system with microcontroller C language program for editing, programming control points indicated by the corresponding LED anode and cathode of the level, you can effectively control the display points of light off. The characters dot matrix display data can be written on their own (i.e. direct lattice drawing), can also be extracted from the standard font.
LED display is flexible in its fabric, display the characteristics of stability, low power consumption, long service life, mature technology, low cost, at the station, securities, sports venues, transportation corridors and various indoor / display settings information, public advocacy, environmental parameters in real time, the major activities of the countdown and so on have been widely used.
Proved by practice, the system displays the error is small, stable performance, reasonable structure, strong expansion capability.
 
Keywords:  STC89C52RC  single-chip   16 ×16LED dot   matix display


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