基于单片机控制的交通灯.doc

基于单片机控制的交通灯
摘要
近年来随着科技的飞速发展，一个以微电子技术、计算机技术和通信技术为先导的信息革命正在蓬勃发展。计算机技术作为三者之一，怎样与实际应用更有效的结合并发挥其作用尤为重要。单片机作为计算机技术的一个分支，正在不断的应用到实际生活中，同时带动传统控制检测的更新。在实时检测和自动控制的应用系统中，单片机往往是作为一个核心部件使用，针对具体应用对象的特点,配以其它器件来加以完善。
十字路口车辆穿梭，行人熙攘，车行车道，人行人道，有条不紊。那么靠什么来实现交通的井然秩序呢？靠的是交通信号灯的自动指挥系统，来实现交通的井然有序。交通信号灯控制方式很多，本系统采用美国ATMEL公司生产的单片机AT89S51，以及其它芯片来设计交通灯控制，实现了通过AT89S51芯片的P1口设置红、绿灯点亮的功能，通过AT89S51芯片的RXD、TXD输入、输出设置显示时间。交通灯的点亮采用发光二极管实现，时间的显示采用七段数码管实现。单片机系统采用的是5 V直流电源供电。为了系统稳定可靠，系统内集成了“看门狗”芯片，避免了系统因为死机而停止工作的情况发生。系统实用性强、操作简单、扩展性好。
关键词：单片机；交通灯；控制器
The Rraffic Light Based on The Single-chip Control
ABSTRACT
In recent years along with technical rapid development， Take microelectronic technology，computer technology and communication as forerunner's information revolution vigorous development。The computer technology took three one，how wields its function concurrently with a practical application more effective union。The monolithic integrated circuit took the computer technology a branch，in the unceasing application practical life，simultaneously is leading the traditional control examination the renewal。In the real-time examination and in the automatic control application system，the monolithic integrated circuit often takes a core part use，in view of concrete application object characteristic, Matches comes by other components to consummate。
The intersection vehicles shuttle，the pedestrian is bustling，car dealership traffic lane, human sidewalk，methodical. What then depends on to realize the transportation orderly order? Depends on is the street-traffic control lights automatic command system，realizes transportation systematic。The street-traffic control lights control mode are very many。This system uses monolithic integrated circuit AT89S51 which American ATMEL Corporation produces，as well as other chips design the traffic light control。Realized mouth has established the function through AT89S51 the chip P1 which red，the green light lightened, through AT89S51 chip R