河南师范大学本科毕业论文 |
正比例应用题>MES质量管理系统 |
学号： **********
学院名称： 物理与电子工程学院
专业名称： 电子信息工程技术
年级班别： 10级电子
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商场现代化******************************
2014年5月
摘要
智能行车电脑
本设计是一16×32点阵LED电子显示屏的设计。整机以单片机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。全屏能显示2个汉字，采用8块8×8点阵LED显示模块来组成16×32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，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。
关键词：AT89C51单片机； LED； 点阵显示； C语言。
Abstract
The paper deals with a 16 × 32 dot matrix LED electronic display design.
Complete machine 40 foot monolithic integrated circuit AT89C51 which produces by American ATMEL Corporation is a core, introduced take it as the control system LED lattice electron display monitor dynamic design and the performance history.Controls good driver 74HC154 and four row driver 74HC595 through this chip actuates the display monitor demonstration.This electronic display monitor may demonstrate each kind of language or the monochrome picture, the entire screen can demonstrate 2 Chinese characters, use 8 8×8 lattice LED demonstration module to compose 16×32 the lattice demonstration pattern.The demonstration uses the dynamic demonstration, causes the graph or the writing can realize static, moves in the emigration and so on many kinds of display mode.In the article in detail introduced the LED lattice demonstration hardware design mentality, hardware electric circuit each part of function and the principle, the corresponding software programming, as well as operating instructions and so on.
SCM control system using microcontroller C language program for editing, the corresponding LED anode and cathode terminal programmed to control the level of each display point, you can effectively control each display point of light off. The dot matrix dispeact
lay data characters can prepare themselves (ie direct dot drawing), can also be extracted from the standard font.
LED display with its flexible fabric, show stable, low power consumption, long service life, mature technology, low cost, etc in the station, securities, sports venues, the traffic trunk road, and various kinds of indoor/outdoor display of information release, public welfare propaganda, environmental parameters in real-time, major events countdown, etc widely used.
The practice has proved that the system displays error is small, stable performance, reasonable structure, strong expansion capability.
