基于51单片机的LED点阵显示屏系统的设计
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密 惠 保
关键字:AT89S51;LED点阵显示;串行通信 [资料来源:THINK58.com]
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Desigen and Realization of the Lattice Screen of LED Based on MCS-51
Abstract: This paper introduces a design of the LED lattice display system base on MCU AT89S51. The system can display in both Chinese and English characters of the show and from top to bottom and move around the magic show. And can be cascaded to expand the screen size to achieve increased content purposes. The PC sends control commands and displays code to microcontroller, AT89S51 receives control commands from PC and shows the code, Driver module drives a 16×16-resolution LED lattice LED’s panel display scan showed. Communication between PC and the microcontroller using RS-232C communications standards. the characteristics that AT89S51 microcontroller is cheap and could be coded conveniently makes the whole system Convenient to Maintenance and Repair. In addition, the system will take up only a small amount of the MCU I/O and memory,so that the system has functional space for expansion. [来源:http://www.think58.com]
Key words: AT89S51, lattice LED’s panel display, serial communication
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目 录
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第1章 绪 论 1
1.1 课题背景 1
1.1.1 选题背景 1
1.1.2 研究现状及发展趋势 1
1.2 论文主要内容 3
第2章 方案论证与选择 4
2.1 系统硬件方案 4
2.1.1 显示屏主控制器 4
2.1.2 通信系统 6
2.1.3 LED点阵显示屏 6
2.1.4 硬件设计方案 7
2.2 系统软件方案 8
2.2.1 单片机编程语言 8
2.2.2 系统软件编译器介绍 9
2.2.3 上位机控制传输软件 9
第3章 系统硬件设计 11
3.1 硬件整体设计概述及功能分析 11
3.2 控制单元设计 12
3.2.1 AT89S51简介 12
3.2.2 控制系统设计 13
3.3 译码电路设计 15
3.3.1 串并转换器74LS164 15 [资料来源:www.THINK58.com]
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