文档介绍：毕业设计[论文]
题目:基于单片机的电子工作牌的设计
学院:电气与信息工程学院
专业:电子信息工程
完成时间: 2013年5月20日
摘要
LED点阵显示屏是一种简单的汉字显示器,具有价廉、易于控制、使用寿命长等特点,在大型商场、车站、码头、地铁站以及各类办事窗口等越来越多的场所需要用LED点阵显示图形和汉字。LED点阵显示屏作为一种新兴的显示器件,是由多个独立的LED发光二极管封装而成。LED行业已成为一个快速发展的新兴产业,市场空间巨大,前景广阔。
本毕业设计是基于单片机的电子工作牌的设计。该系统以STC公司生产的40脚单片机STC89C52为核心,外加译码电路,显示驱动电路和16*32的点阵显示屏等部分组成的设计。该电子工作牌可以显示各种文字或单色图像,全屏能显示2个汉字,显示采用动态显示,通过按键控制使图形或文字能够实现左移、右移、上移、下移等多种显示方式,并且可以通过按键控制动态显示的速度。由串并转换器74HC138译码器实现点阵16行控制,74HC595为驱动电路器件,实现点阵显示32列控制。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。
关键词:STC89C52单片机 LED点阵显示屏动态显示
Abstract
LED dot matrix display Chinese characters display is a simple, inexpensive, easy to control, long life and so need to use more and more places, shopping malls, railway stations, docks, subway stations and a variety of work windowLED dot matrix display graphics and characters. LED dot matrix display as a new display devices by multiple independent LED light-emitting diode package from. LED industry has e a fast-growing emerging industry, a huge market space and broad prospects.
The graduation project is the design of microcontroller-based electronic card. The 40-pin microcontroller STC89C52 the STC production as the core, plus decoding circuit design part of the drive circuit and 16 * 32 dot matrix display. The electronic card can display a variety of text or monochrome images, full-screen can display two characters, dynamic display, through the control button graphics or text to left shift, right shift, move up, down a variety of display , and can be keys to control the speed of the dynamic display. 74HC138 decoder 74HC595 32 dot matrix display control drive circuit devices, dot matrix line 16 control, serial-to-parallel converter. This paper describes the functions of various parts and principle of LED dot matrix display hardware design ideas, the hardware circuit, the corresponding software programming, as well as instructions for use.
Key words: STC89C52 microcontroller LED dot matrix display dynamic disp