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多功能点阵电子显示屏的设计
作者:admin   发布于:2014-03-05 20:37    文字:【】【】【
多功能点阵电子显示屏的设计

 
摘  要
 
     LED显示屏是一种通过控制半导体发光二极管的显示方式, 可以显示数字或符号, 通常用来显示时间、速度、系统状态等。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。此外,已架设的大型LED显示屏幕每10年将历经一次换机潮,随着人们生活水平的提高,户外LED显示屏将逐渐应用于各个行业。
     本设计是4个16×16点阵LED电子显示屏的设计。整机以美国Atemel公司生产的40脚单片机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。通过该芯片控制一个行驱动器74LS154来驱动显示屏显示。采用16块8 x 8点阵LED显示模块来组成4个16x16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。经实践证明,该系统显示误差小,性能稳定,结构合理。
 
关键词:AT89C51单片机  LED  点阵显示 动态显示
 
 
 
 
 
 
 
ABSTRACT
 
 LED display is the display mode controlling by the semiconductor light emitting diode,.and it is usually used to show time, speed, the state of system etc. LED display with fabric means flexibility, stability, low power consumption, long life, mature technology, low-cost features at the station, securities, sports venues, transportation corridors and various indoor / dissemination of information on foreign shows occasions, good publicity, real-time environmental parameters, etc. countdown major activities are widely used.In addition, the original large-scale LED display screen will be updating once per 10 years, with the improvement of people’s living standard, outdoor LED display will gradually be used in various industries.
    This design is 4 16 ×16 lattice LED electron display monitor design.The whole equipment is with the 40-pin AT89C51 MCU (Micro Controller Unit) produced by the American Atmel company at the core, introduced take it as the control system LED lattice electron display monitor dynamic design and the development process. Controls good driver 74LS154 through this chip actuates the display monitor demonstration. one full screen display Chinese characters,sixteen pieces of 8 x 8 dot-matrix LED display modules to form the 16x16 dot matrix display mode. Show dynamic show that makes static graphic or text can be achieved, shifted out of various formats. This paper describes the hardware design of the LED dot matrix display, and the principle function of the various parts of the circuit, the corresponding software program design and the use of some such. As the practice proves, the system possesses advantages in low shows errors, stable, rational structure .
 
Key words:AT89C51 Micro Controller UnitLEDLatticeDisplayDynamicDisplay

 
 目 录
第一章 绪论................................................................................................1
  1.1 LED点阵系统概述...................................................................................1              
  1.2 LED点阵显示屏分类..............................................................................1
  1.3 LED系统前景..........................................................................................2
第二章 点阵显示器的系统方案设计......................................................3
2.1设计总框图及介绍..................................................................................3
2.3  方案论证.............................................................................................3
2.3.1  显示模式方案...........................................................................4
    2.3.2  数据传输方案............................................................................5
第三章 点阵显示器的硬件电路设计.......................................................6
  3.1 单片机最小应用系统电路原理...........................................................6 
  3.2 STC89C51 单片机简介......................................................................7
  3.3 16*16LED点阵的组成.......................................................................10
  3.4 74LS154芯片简介..........................................................................12
第四章 点阵显示器的系统软件设计................................................14
    4.1 keil 软件简介................................................................................14
     4.11系统概述......................................................................................14
     4.12  keil C51软件编程......................................................................15
4.2软件流程图.......................................................................................17
   4.3 16*16点阵滚动显示的软件设计...................................................18
   4.4源程序代码....................................................................................19
第五章 系统调试与仿真....................................................................26
      5.1 proteus仿真..................................................................................26
     5.11 proteus介绍................................................................................26
     5.12 proteus工作过程.........................................................................35     
    5.2 proteus 软件功能特点 ..................................................................27
    5.3仿真步骤及方法................................................................................27
5.4 proteus软件的调试手段 ................................................................. 28
第六章 PCB设计及protel介绍...........................................................30
6.1 protel简介.....................................................................................30
6.2 protel99简介.........................................................................................30
6.3制作原理图............................................................................................30
6.4 PCB板制作...........................................................................................31
第七章  调试及性能分析.......................................................................34
    7.1 软件调试............................................................................................34
7.2 硬件调试.............................................................................................35

   7.3性能分析............................ ......36

 
总结..........................................................................................38
致谢..................................................................................................40
参考文献.....................................................................................41


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