LED点阵套件开发（软件）_电气工程论文-免费论文网

LED点阵套件开发（软件）

论文编号:DQ208 论文字数:9133,页数:27

摘要
在现代信息社会，通过宣传媒介已成为人们获取信息的一种主要手段。在诸多类型的宣传媒体中，全彩色、高分辨率的LED大屏幕电子显示屏具有色彩丰富、亮度高且可调、能够进行插播和画面编辑等突出的特点，正发挥着不可替代的作用，而点阵显示技术是其中的关键技术。
LED点阵电子显示屏制作简单，安装方便，被广泛应用于各种公共场合，如汽车报站器、广告屏以及公告牌等。本文介绍的是一种可用在值班室外等场合的公告牌的LED点阵电子显示屏设计。公告内容随时可以更新，能够显示温度和日期时间，并具有自动亮度调节功能。考虑到所需元器件的易购性，本设计使用了8×8的点阵发光管模块，组成16×64发光点阵，显示待定的中文、字符以及数字。
本设计所要求的显示汉字、字母和数字均已实现，并能控制文字的左右移动及速度。同时，温度与日期时间可以实时显示，与上位机联机尚未通信成功。整机系统的硬件制作简便，难点是软件设计。本系统采用并行方式显示，并且采用主从单片机来控制整个系统，这样能够大大减化软件的编写难度，容易实现各项功能指标。

关键词： LED点阵显示屏；单片机；驱动电路

Abstract

In modern times of informational, it has become the one main means that people to gain the information throughing the propaganda medium. In many types’ propaganda medias, entire colored and high-resolution LED large electron display screen has many prominent features which is colorful,.high and adjustable lightness,it can spots,and picture editor. It has been playing an irre
-placeable role. However, lattice display technique is the key techniques.
Lattice LED electronic display in production is simple, in installation is convenient, which is widely used in various public occasions, such as auto-stop device, advertisement screens, as well as bulletin boards. This article describes a kind of used in the duty room and other places outside of the electronic bulletin boards LED lattice display design. Notice the content can be updated at any time to real-time display of temperature and date and time, and has automatic brightness adjustment function. Taking into account the ease of purchase of the required components, this design uses an 8 × 8 lattice LED modules, composed of 16 × 64 LED lattice, showing pending Chinese characters and digital . This design required by the display of Chinese characters, letters and numbers have been achieved, and can control the text and move around and speed. At the same time, temperature and date and time can be real-time display, but unsuccess of online communication with the host computer. Machine system's hardware production is simple and software design is difficult. The system uses a parallel display, and the use of master-slave microcontroller to control the entire system, what can greatly reduce the difficulty of the preparation of software, and easy to achieve the function index.

Key word: LED lattice displayer；MCU；driver circuit

摘要 I
Abstract II
1 绪论 1
2 系统总体方案设计 2
2.1 系统总体结构 2
2.1.1 系统总体设计的目的 2
2.1.2 系统总体设计的思路 2
2.2 系统主要硬件描述 3
2.2.1 控制单片机——STC89C54的简要介绍 3
2.2.2 STC89C54的特点及其管脚图 3
2.2.3 温度传感器——DS18B20 4
2.2.4 74HC595移位寄存器 6
2.2.5 时钟芯片DS1302 7
3   系统硬件设计 9
3.1 系统硬件设计原理图 9
3.1.1 控制器部分 9
3.1.2 时钟电路部分 10
3.1.3 LED显示驱动部分 10
3.1.4 串行数据传送部分 10
3.2 系统硬件设计实物图 11
4   系统软件设计 13
4.1 系统软件设计的基本思路 13
4.2 系统控制软件流程 13
4.3 汉字显示原理 14
4.4 LED静态显示 17
4.5 LED动态左移显示 17
4.6 LED下移显示 18
4.7 软件调试 20
5   结论 21
致谢 22
参考文献 23

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