摘 要:本论文是对LED点阵书写显示屏的设计。该显示屏的设计主要以STC89C52单片机作为设计的核心基础,通过对芯片74HC154与74HC595的控制,以完成对显示屏的行列驱动工作。显示的汉字数据信息,可从标准字库中提取,也可自定义显示图像数据。显示屏部分由4块8X8单色点阵模块组成的16X16规格大小的点阵屏,实现对单个汉字的显示功能。本次设计的软件部分,采用C语言编程控制点阵中各个显示点的电平高低控制,实现对各显示点的亮灭控制。从人眼的暂存性角度出发,采用动态扫描的显示方式完成对字符的显示。本文主要介绍了所采用的硬件电路设计思想、各模块所实现功能的介绍、对应的软件的程序设计与说明等。最终由Keil软件编译并生成.hex文件,烧写至单片机进行运行,完成对显示屏的调试工作。32031
毕业论文关键词:STC89C52 LED 点阵 驱动 动态显示
Smart Lattice LED Screen Based On STC89C52
Abstract:This paper is written about the design of LED lattice display screen . The display design is mainly based on STC89C52 as the core of the design, through the control of the chip 74HC154 and 74HC595 to complete the work to display the ranks of driver. Display Chinese character of data information can be extracted from the standard word stock, can also be customized according to image data. Display part is composed of 4 block 8X8 dot matrix display module of 16X16 dot matrix display screen to realize the function of a single Chinese character display. The software part of the design, the use of C language programming to control the display in the lattice point, realize to control all show points on and off. From the staging of the human eye perspective,by using dynamic scanning display mode to complete the display of the characters. This article introduces the design thought of hardware circuit, the realization of function is introduced, and corresponding software program design and instructions, etc. Ultimately generated by Keil software .Hex file, burning to the single-chip microcomputer for running, finish the adjustment of the display screen.
Keywords: STC89C52 LED lattice actuate dynamic display
目录
1 绪论 1
1.1 LED点阵显示屏 1
1.1.1 概念与基本原理 1
1.1.2 LED点阵显示屏的分类 1
1.1.3 LED点阵显示屏的特点 1
1.2 选题背景与意义 2
1.3 研究现状 2
1.4 本文的结构 3
2 系统的设计方案 4
2.1 实现的功能 4
2.2 LED的特性介绍 4
2.3 设计方案的论证 5
2.3.1 显示模式的分析 5
2.3.2 数据传输方式的分析 6
3 系统的硬件设计分析 8
3.1 电源设计 8
3.2 单片机最小系统 8
3.2.1 单片机的选择 8
3.2.2 STC89C52的介绍 9
3.2.3 单片机的外围电路 10
3.3 列驱动电路 11
3.3.1 列驱动芯片74HC595的介绍 11
3.3.2 列驱动电路的介绍 12
3.4 行驱动电路 13
3.4.1 行驱动芯片74HC154的介绍 13
3.4.2 行驱动电路的介绍 15
3.5 LED显示屏电路 17
3.6 温度与时间模块电路 17
3.6.1 温度传感器DS18B20的介绍 17
3.6.2 温度模块的电路介绍 19 STC89C52单片机智能点阵LED显示屏设计+电路图:http://www.youerw.com/zidonghua/lunwen_28421.html