交通灯-论文参考

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5V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TheRrafficLightBasedonTheSingle-chipControlABSTRACTInrecentyearsalongwithtechnicalrapiddevelopment，Takemicroelectronictechnology，computertechnologyandcommunicationasforerunner'sinformationrevolutionvigorousdevelopment。Thecomputertechnologytookthreeone，howwieldsitsfunctionconcurrentlywithapracticalapplicationmoreeffectiveunion。Themonolithicintegratedcircuittookthecomputertechnologyabranch，intheunceasingapplicationpracticallife，simultaneouslyisleadingthetraditionalcontrolexaminationtherenewal。Inthereal-timeexaminationandintheautomaticcontrolapplicationsystem，themonolithicintegratedcircuitoftentakesacorepartuse，inviewofconcreteapplicationobjectcharacteristic,Matchescomesbyothercomponentstoconsummate。Theintersectionvehiclesshuttle，thepedestrianisbustling，cardealershiptrafficlane,humansidewalk，methodical.Whatthendependsontorealizethetransportationorderlyorder?Dependsonisthestreet-trafficcontrollightsautomaticcommandsystem，realizestransportationsystematic。Thestreet-trafficcontrollightscontrolmodeareverymany。ThissystemusesmonolithicintegratedcircuitAT89S51whichAmericanATMELCorporationproduces，aswellasotherchipsdesignthetrafficlightcontrol。RealizedmouthhasestablishedthefunctionthroughAT89S51thechipP1whichred，thegreenlightlightened,throughAT89S51chipRXD、TXDinput，outputestablishmentdemonstrationtime。Thetrafficlightlightensusesthelightemitterdioderealization，thetimedemonstrationusessevensectionofnixietuberealizations。Themonolithicintegratedcircuitsystemusesdirect-currentpowersupply。Forsystemstablereliable，inthesystemintegrated“thewatch-dog”thechip，avoidedthesystembecauseofdyingmachinetheknockoffsituationoccurrence。Thesystemusabilitystrong、theoperationsimple、theextensionisgood。KEYWORD:Onlyflatmachine；Trafficlights；Controller目录1前言.............................................................................................................................................12交通管理方案论证.....................................................................................................................22.1设计任务..........................................................................................................................22.2方案选择..........................................................................................................................23交通灯系统硬件设计.................................................................................................................53.1单片机概述......................................................................................................................53.2系统构成..........................................................................................................................53.3芯片选择与介绍..............................................................................................................63.3.1AT89S51芯片........................................................................................................63.3.274LS164芯片........................................................................................................93.3.374HC04输出信号与信号灯................................................................................103.4LED数码管显示............................................................................................................103.5交通灯控制线路图........................................................................................................124交通灯系统软件设计...............................................................................................................144.1程序设计流程图............................................................................................................144.2延时的设定....................................................................................................................154.2.1计数器初值计算.................................................................................................154.2.2相应程序代码.....................................................................................................164.3程序的主控制循环调用................................................................................................174.4对现有程序的扩充........................................................................................................185实验调试...................................................................................................................................195.1实验平台........................................................................................................................195.2实验步骤......................................