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桂林电子科技大学专业工程设计编号：课程设计说明书（专业工程设计）题目：基于51单片机八路抢答器的设计院（系）：信息与通信学院专业：微电子科学与工程学生姓名：伦海威学号：1300240120指导教师：李琦2016年12月17日桂林电子科技大学专业工程设计摘要随着科学技术的发展和普及，各种各样的竞赛越来越多，其中抢答器的作用也就显而易见。目前很多抢答器基本上采用小规模数字集成电路设计，使用起来不够理想。因此设计一更易于使用和区分度高的抢答器成了非常迫切的任务。现在单片机已进入各个领域，以其功耗小、智能化而著称，所以若利用单片机来设计抢答器，便使以上问题得以解决.针对以上情况，本文设计出以STC89C52RC单片机为核心的八路抢答器。我们采用了数字显示器直接指示，自动锁存显示结果，并自动复位的设计思想,它能根据不同的抢答输入信号，经过单片机的控制处理并产生不同的与输入信号相对应的输出信号，最后通过LED数码管显示相应的路数，即使两组的抢答时间相差几微秒，也可分辨出是哪组优先按下的按键，它充分利用了单片机系统的优点，具有结构简单、功能强大、可靠性好、实用性强的特点。本设计是以八路抢答为基本理念。考虑到依需设定限时回答的功能，利用51单片机及外围接口实现的抢答系统，利用单片机的定时器/计数器定时和记数的原理，将软、硬件有机地结合起来，使得系统能够正确地进行计时，同时使数码管能够正确地显示时间。用开关做键盘输出，扬声器及LED指示灯发出提示。同时系统能够实现：在抢答中，只有开始后抢答才有效，如果在开始抢答前抢答为犯规；满时后系统计时自动复位及主控强制复位；按键锁定，在有效状态下，按键无效非法。【关键词】STC89C52RC；共阴数码管；按键；蜂鸣器桂林电子科技大学专业工程设计ABSTRACTWiththedevelopmentandpopularizationofscienceandtechnology,avarietyofcompetitionsmoreandmore,inwhichtheroleoftheResponderwillbeobvious.Atpresent,alotofanswerbasicallyusingsmall-scaledigitalintegratedcircuitdesign,useitisnotideal.Sodesignamoreeasy-to-useandhigh-definitionoftheResponderhasbecomeaveryurgenttask.NowMCUhasenteredvariousfields,withitspowerconsumptionissmall,intelligentandknown,soiftheuseofsingle-chipdesigntoanswer,sothattheaboveproblemscanberesolved.Inviewoftheabove,thisdesigntoSTC89C52RCsinglechipasthecoreoftheeight-.Weusethedirectdisplayofdigitaldisplay,automaticallylatchthedisplayresults,andautomaticallyresetthedesign,itcananswerinaccordancewiththedifferentinputsignals,throughthemicrocontrollercontrolandproducedifferentinputsignalcorrespondingtotheoutputsignal,andfinallythroughLEDdigitaltubeshowsthecorrespondingnumberofroad,evenifthetwogroupsoftheanswertimedifferenceofafewmicroseconds,whichcanbedistinguishedwhichgroupofprioritypressthebutton,whichmakesfulluseoftheadvantagesofSCMsystemwithasimple,powerful,reliableGood,practicalandstrongfeatures.Thedesignisbasedoneight-wayanswerforthebasicidea.Takingintoaccounttheneedtosetthetimelimittoanswerthefunction,theuseof51MCUandperipheralinterfacetoachievetheanswerinthesystem,theuseofsingle-chiptimer/countertimingandcountingprinciple,thesoftwareandhardwareorganicallycombine,makingthesystemcorrectlyTime,whileallowingthedigitaltubetodisplaythecorrecttime.Withtheswitchtodothekeyboardoutput,speakerandLEDindicator.Atthesametimethesystemcanbeachieved:intheanswer,onlyafterthebeginningoftheanswerisvalid,ifinthebeginningtoanswerbeforeansweringforfoul,fulltimeafterthesystemautomaticallyresetandmasterreset.【Keywords】STC89C52RC,commoncathodedigitaltube,button,buzzer桂林电子科技大学专业工程设计目录引言...............................................................1第一章方案概述....................................................................................................................21.1设计目标...............................................................................................................................21.1.1基本功能...........................................................................................................................21.1.2主要技术参数..................................................................................................................2第二章硬件设计与原理....................................................................................................32.1总设计框图..........................................................................................................................32.2硬件设计分析......................................................................................................................32.2.1单片机主控模块..............................................................................................................42.2.2STC89C52芯片简介........................................................................................................42.2.3封装和引脚说明..............................................................................................................42.2.4数码管显示电路.............................................................................................................72.2.5按键输入电路..................................................................................................................92.2.5报警与指示电路...........................................................................................................11第三章软件仿真..................................................................................................................113.1软件调试部分....................................................................................................................113.1.1PROTEUS简介.................................................................................................................113.1.2软件调试....................................................123.2PROTEUS仿真图................................................13第四章硬件调试..................................................154.1DXP软件简介..................................................154.1.1原理图......................................................154.1.2PCB图......................................................154.2实物图.............................................