基于单片机滚动字幕设计.doc

沈阳大学毕业设计（论文）基于单片机滚动字幕设计专业：电子信息科学与技术班级：2006 级 1 班姓名：贺莹沈阳大学毕业设计（论文）目 录引 言.........................................................................................................31 LED 显示屏系统原理..............................................................................61.1 LED 器件的工作原理...........................................................................6 1.2 基于 LED 显示屏的大屏幕显示系统的组成...............................................8 1.3 简易 LED 显示屏系统的硬件组成.........................................................11 1.4 简易 LED 系统的软件系统..................................................................122 系统硬件设计.......................................................................................142.1 整体设计分析...................................................................................14 2.2 处理器选取原理及功能介绍.................................................................15 2.3 行驱动电路设计................................................................................20 2.4 列驱动电路设计................................................................................21 2.5 数据存储器接口设计..........................................................................26 2.6 串行接口电路...................................................................................273 系统软件设计.........................................................................................303.1 上位机系统软件设计..........................................................................30 3.2 下位机系统软件设计..........................................................................32 3.3 特效显示程序设计.............................................................................34 3.4. 汉字提取程序设计............................................................................384 系统调试................................................................................................404.1 硬件调试..........................................................................................40 4.2 软件调试.........................................................................................41结 论.......................................................................................................44致 谢.......................................................................................................45参考文献....................................................................................................46附录 1 系统实物图......................................................................................48附录 2 硬件电路图......................................................................................49附录 3 程序代码......................................................................................50沈阳大学毕业设计（论文） No.1摘摘 要要伴随着当今高度发展的信息时代，传统的移动车库门显示屏控制系统已经不能满足人们对信息显示的需要。

当今涉及电子电路、集成电路、信息图象处理、信息传输及电子产品安装工程等相关技术的LED显示屏在信息领域显得尤为活跃，在各行业的应用和普及方面也取的了长足的进步设计基于AT89S51单片机的简易LED显示屏该显示屏系统采用PC机加单片机组成的上下位机方式其中PC机用于更新信息数据，单片机用于控制硬件扫描及显示电路，上下位机之间采用RS-232通信标准系统软件是由用C++ Builder 编写的上位PC控制及通信软件和C语言编写的显示屏控制软件两部分组成硬件处理器选用AT89S51LED 显示屏是利用发光二极管点阵模块或像素单元组成的平面显示屏幕它具有发光率高、使用寿命长、组态灵活、色彩丰富以及对室内外环境适应能力强等优点LED 显示屏发展较快，被广泛的用于公交汽车、商店、体育场馆、车站、学校、银行、高速公路等公共场所的信息发布和广告宣传本文讲述了基于 AT89C51 单片机 16X64LED 汉字点阵滚动显示的基本原理、硬件组成与设计、程序编写与调试、protel 软件等基本环节和相关技术关键词：单片机；点阵；显示屏；数据；控制；沈阳大学毕业设计（论文） No.2AbstractWith today’s highly developed information, traditional mobile garage door screen control system can not meet the needs of the people on the information display. Today LED display which involves electronic circuit, integrated circuit, information, image processing, information transmission and electronic products and other related technologies, installation has particularly acted in the field of information in the application and popularization of various industries and also taken great strides. This paper designs a simple LED-based display AT89S51 microcontroller. The display system is composed of PC, plus the Upper and Lower MCU mode. PC, which used to update the information data, microcontroller used to control the hardware scan and display circuit, between the upper and lower computer using RS-232 communication standard. System software is written using C + + Builder the upper PC control and communication software and C language written display control software. Hardware processor selects AT89S51. LED dot matrix display is flat display screen which is use light-emitting diode pixel module or modules. It has high light, long life, flexible configuration, color-rich and strong adaptability indoor and outdoor environment. LED display develops rapidly so is widely used in public transport vehicles, shops, stadiums, railway stations, schools, banks, highways and other public places, information publishing and advertising. This paper describes the characters such as display principle, the hardware composition and design, programming and debugging, protel software’s basic parts and related technologies which bases on AT89C51 microcontroller 16X64LED scrolling dot-mat。