基于单片机的跑马灯设计

范文编号:ZD646    范文字数:11789,页数:35

 摘 要
 
 二十世纪跨越了三个“电”的时代，即电气时代、电子时代和现已进入的电脑时代。不过，这种电脑，通常是指个人计算机，简称PC机。它由主机、键盘、显示器等组成。还有一类计算机，大多数人却不怎么熟悉。这种计算机就是把智能赋予各种机械的单片机（亦称微控制器）。顾名思义，这种计算机的最小系统只用了一片集成电路，即可进行简单运算和控制。因为它体积小，通常都藏在被控机械的“肚子”里。它在整个装置中，起着有如人类头脑的作用，它出了毛病，整个装置就瘫痪了。现在，这种单片机的使用领域已十分广泛，如智能仪表、实时工控、通讯设备、导航系统、家用电器等。各种产品一旦用上了单片机，就能起到使产品升级换代的功效，常在产品名称前冠以形容词——“智能型”，如智能型洗衣机等。学习单片机的最有效方法就是理论与实践并重，本文将用单片机8051和外围接口8155、发光二极管、晶振、复位、电源等电路以及必要的软件组成的以8051为核心，辅以简单的设备和必要的电路，设计了一款简易的跑马灯，并编写简单的程序，使其能够自动工作。

关键词：单片机8051，外围接口8155，跑马灯。

 
 ABSTRACT
 
 
Across the twentieth century, the three "power" of the times, that is, the electrical era, the electronic age and the computer age which has entered now. However, such a computer, usually refers to a personal computer, or PC. It consists of the host, keyboards, monitors, etc. There is also a type of computer which is not familiar with by people. The computer is smart to give a variety of mechanical single-chip (also known as micro-controller). As the name suggests, these computer systems use only the minimum of an integrated circuit to make a simple calculation and control. Because of its small size, are usually charged with possession of machine in the "belly" in. It in the device, like the human mind plays a role, it is wrong, the entire device on the paralysis of the. Now, this single chip has a very wide field of use, such as smart meters, real-time industrial control, communications equipment, navigation systems, and household appliances. Once a variety of products with the use of the single-chip, will be able to play so that the effectiveness of product upgrading, product names often adjective before the word - "intelligent," such as washing machines and so intelligent. Single-chip learning is the most effective way of both theory and practice, this article will be used to single-chip 8051 and peripheral interfaces 8155, light-emitting diode, oscillator, reset, power circuit, as well as the composition of the necessary software to 8051 as the core, Des simple equipment and the necessary circuitry, designed a simple water lights, and the preparation of a simple procedure to enable it to automatically work.

Key words: single-chip8051, peripheral interface8155, water lights.

目 录
 
 摘 要 1
 ABSTRACT 2
 前 言 3
 第1章 系统方案设计 4
1.1  系统总体设计方案 4
1.2  基本功能简介 4
1.3  系统程序 4
 第2章 8051单片机原理分析及硬件电路 6
2.1  8051单片机简述 6
2.1.1  8051单片机的基本组成 6
2.1.2  8051的信号引脚 8
2.2  晶体振荡电路 10
2.3  上电复位电路 11
2.4  8051单片机的并行I/O口 12
2.5  8051单片机的中断系统 12
2.6  8051单片机的定时/计数器 13
2.6.1  定时/计数器的定时功能 13
2.6.2  用于定时/计数器控制的寄存器 14
 第3章 8051单片机与8155的接口设计 15
3.1  并行I/O接口8155 15
3.1.1  8155内部功能结构及引脚 15
3.1.2  作片外RAM使用 16
3.1.3  作扩展I/O口使用 16
3.1.4  I/O口的工作方式 18
3.1.5  定时/计数器使用 18
3.2  8051单片机并行I/O扩展 19
3.2.1  8051并行扩展总线 19
3.2.2  8051单片机与8155的接口 19
 第4章 单片机与8155的接口设计的应用 21
 4.1  LED显示 21
 4.2  按键扫描 22
 第5章  结论 24
 参考文献 26
 文档设计小结 27
 附录 28

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