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1、河南工学院毕业设计论文论文题目:智能抢答器系部电子通信工程系专业应用电子技术班级应电144学生姓名张会坡学号140415201指导教师闵茹22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越来越重要。本文设计出以AT89S51单片机为核心的八路抢答器,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,
2、充分利用了单片机系统结构简单、功能强大、可靠性好、实用性强的特点。本设计是以抢答为出发点。考虑到依需设定限时回答的功能,利用89S51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,扬声器发生提示。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无效;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】抢答器单片机LED数码显示管定时器/计
3、数器扬声器。2ABSTRACT(与中文摘要接排)Withthedevelopmentandpopularizationofscienceandtechnology,allkindsofcompetitionsaremoreandmore,andtheroleoftheresponderismoreandmoreimportant.ThispaperdesignseightresponderbasedonAT89S51microcontrollerasthecore,adoptsdigitaldisplaydirectinst
4、ructions,automaticlatchdisplayresults,anddesignideaofautomaticreset,itcanansweraccordingtodifferentinputsignals,throughtheMCUcontrolprocessingandproduceoutputdifferentsignalcorrespondingtotheinputsignal,finallydisplaythecorrespondingthewaythroughtheLEDdigitaltube,e
5、venifthetwogroupsQiangdathedifferenceintimeafewmicroseconds,cantellwhichgroupispreferredbypressingthebutton,makefulluseofthecharacteristicsofthesinglechipsystemhastheadvantagesofsimplestructure,powerfulfunction,goodreliabilityandpracticability.Thisdesignistoanswera
6、sthestartingpoint.Consideringaccordingtoneedtosetthefunctionofthelimitanswer,answersystembasedontheMCU89S51andperipheralinterface,theuseofsingle-chiptimer/countertimingandcountingprinciple,thesoftwareandhardwareorganicallyandmakesthesystemcancorrectlytime,whilethed
7、igitaldisplaytothecorrecttime.Switchwiththekeyboardoutput,speakerprompts.Atthesametime,thesystemcanberealized:intheanswer,onlyaftertheanswerisvalid,ifatthebeginningofpreansweranswerinvalid;fullautomaticresetafterthesystemtimingandcontrolforcedreset;keylockintheeffe
8、ctivestate,thekeyis2invalidillegalKeyWordsRespondermicrocontrollerLEDdigitaldisplaytubetimer/timerspeaker222目录摘要……………………………………………………………………………………2