目录
摘要
十字路口车辆穿梭,行人熙攘,车行车道,人行人道,有条不紊.那么靠什么来实现这井然秩序呢 靠的是交通信号灯的自动指挥系统.交通信号灯控制方式很多.本设计主要分为五大模块输入控制电路,时钟控制电路,片内外程序切换控制,显示电路.以MSC-51系列单片机IntelAT89C51为中心器件来设计交通灯控制器,实现了AT89C51芯片的P0口设置红,绿灯,黄灯燃亮时间的功能;为了系统稳定可靠采用了74LS14施密特触发器芯片的消抖电路,避免了系统因输入信号抖动产生误操作;显示时间直接通过AT89C51的P2口输出,由CD4511驱动LED数码管显示红灯燃亮时间.
关键字:AT89C51 LED显示 交通灯
Summary
The intersections vehicle wears shuttle, pedestrian Xi Rang, garage driveway, person's sidewalk, orderly.So depend what to carry out this well arranged order What to depend is a traffic sign light of automatic conductor system.The control method of the traffic sign light is a lot of.This design is mainly divided into five greatest molds a piece the electric circuit, clock of the importation control a control outside procedure inside the electric circuit, slice to cut over a control and shows electric circuit.Take single slice the machine IntelAT89 C51 of the serieses MSC-51s as a center spare part to design transportation light controller, carried out the AT89 C51's P's 0 people's constitution of the chips red, the function in bright time of green light, Huang2 Deng Ran2;For the sake of system stability the credibility adopted a 74 LS14 airtight trigger eliminate of machine chip to tremble electric circuit especially, avoided system because of importation the signal tremble movable property to living a mistake operation;The P 2 people who shows that time directly passes the AT89 C51 output, is driven LED figures a tube by the CD4511 to show red-light Ran bright time.
Key word: The AT89 C51 LED show transportation light
任务要求:
下图1为十字路口交通信号灯控制示意图,信号灯的动作受开关总体控制:
1,按一下启动按钮,信号灯系统开始工作,并周而复始地循环动作;
2,按一下停止按钮,所有信事情灯全部熄灭;
3,具体控制要求见表1.在现有的功能上有自已的创新.
东西
信号
绿灯亮
绿灯闪亮
黄灯亮
红灯亮
时间
5s
2s
2s
9s
南北
信号
红灯亮
绿灯亮
绿灯闪亮
黄灯亮
时间
9s
5s
2s
2s
表1 十字路口交通信号灯控制要求
4,发光管与AT89C51的连接如下,其中奇数口代表红色, 偶数口代表绿色,奇偶同用为黄色.

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