基于AT89C51单片机的篮球比赛计时与计分系统设计.pdf

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篮球比赛计时与计分系统设计

摘要

随着单片机在各个领域的广泛应用，许多用单片机作控制的球赛计时计分器也应运而

生，如用单片机控制LCD液晶显示器的计时计分器，用单片机控制LED七段显示器的计时

计分器等等。

本次设计的篮球计时计分系统以AT89C51单片机为核心元件，利用它内部的计数器

T0完成比赛的计时，通过七段共阴极LED来显示比分和时间。计时部分采用CD4511（七

段BCD码译码器）进行硬件译码；计分部分采用CD4094（8位移位存贮总线寄存器）进行

串行口扩展显示器接口，并利用74LS21（双四输入与门）来实现比分的刷新功能。报警

部分采用蜂鸣器为音响器件。本系统具有赛事时间设置、赛事时间启/停设置、24s倒计

时控制；比分刷新控制；报警等功能。且造价低廉、操作简单、携带方便，适合于学校或

小团体作为赛程计时计分工具。

关键词：篮球计时计分系统；七段共阴LED数码管；AT89C51

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BASKETBALLGAMETIMEANDSCORINGDESIGN

ABSTRACT

WithawiderangeofSCMapplicationsinvariousfields,manywithasingle

chiptimingforthecontrolofthegamescoringdevicehaveemerged,suchasliquid

crystaldisplayLCDwithMCUcontrolthetimingofscoringdevice,LEDseven

segmentdisplaywithmicrocontrollertimingcontrolpointsandmore.

ThetimebasketballscoringsystemdesignedtoAT89C51microcontrollerasthe

corecomponent,useittofinishwithinthetimeT0counter,throughthecommon

cathodesevensegmentLEDtodisplaythescoreandtime.ParttimeusingCD4511

(sevensegmentBCDdecoder)forhardwaredecoding;scoringpartisCD4094(8-bit

shiftregisterstoragebus)serialportexpansion,monitorport,anduse74LS21

(Dualfour-inputANDgate)toachievethescoreoftherefreshfunction.Buzzer

tosoundthealarmpartofthedeviceused.Thesystemhassettheeventtime,

eventtimestart/stopsetting,24scountdowncontrol;scorerefreshcontrol;

alarmfunctions.Andlowcost,simpleoperation,easytocarry,suitablefor

schoolsorsmallgroupsastheracetimescoringtool.

KeyWords:Timebasketballscoringsystem;Commoncathodesevensegment

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