文档介绍：摘要
本文介绍了一款以单片机STC89C52为控制器的LED点阵显示屏系统的设计。该系统可实现宋体汉字的静态显示和动态特效显示。系统采用PC机作为上位机,上位机向单片机发送控制命令和上位机所存储的显示代码,STC89C52单片机接收并处理PC机的控制命令以及显示代码,由显示驱动模块驱动一个16×16分辨率的LED点阵显示屏的扫描显示。上位机软件部分主要通过软件编写一个字模转换发送的界面;实现上位机与下位机的通信;控制部分主芯片是STC89C52,是系统的核心,再利用C语言编程下载实现对单片机各引脚的控制;LED点阵显示屏包括驱动电路和显示屏,74HC138译码器输出控制显示屏的行扫描,74HC573(八位数据锁存器)控制显示屏的列,由于人眼视觉的滞留现象,行列驱动电路通过动态控制便实现了汉字的显示。
关键词:STC89C52 LED点阵屏单片机 74HC138 74HC573
ABSTRACT
This paper introduced a system design of LED dot matrix display which based on a single-chip controller STC89C52 . The system can display Arial static and dynamic character effects display. System uses a PC as a PC, the PC sends mands to the microcontroller and PC display code stored, STC89C52 microcontroller receives and processes mand and control of the PC display code, by the display driver module to drive a 16 × 16 resolution LED dot matrix display scan display. PC software software development, mainly through VB interface to send a font conversion; Between PC and the next crew munication; controlling part of the main chip is STC89C52, is the core of the system, and then use the C programming language download each pin of the microcontroller to achieve control; LED dot matrix display includes a drive circuit and display, 74HC138 decoder output control display line scan, 74HC573 (eight data latches) control the display of the column, because the human visual retention phenomenon, the ranks driving circuit through the dynamic control will achieve a display of Chinese characters.
Keywords: STC89C52 LED dot matrix display microcontroller 74HC138 74HC573
目录
第一章绪论 1
课题背景 1
选题背景 1
研究现状和发展趋势 1
2
论文主要内容 3
第二章方案的选定 5
5
显示屏主控制器 5
通信系统 7
LED点阵显示屏 7
硬件设计方案 9
系统软件方案 9
单片机编程语言 9
系统软件编译器介绍 10
上位机控制传输软件 10
第三章点阵屏 11
点阵屏原理 11
11
点阵屏的组合 12
点阵的驱动原理 12
字模的提取 13
第四章系统硬件设计 15
系统硬件整体设计概述和功能分析 15
16
STC89C52简介 16
4.