#include<reg51.h>#defineucharunsignedchar#defineuintunsignedintsbitlaba=P3A3;//喇叭sbitkaishi=P3A4;//開始sbitqingling=P3A5;//清零sbitfunction=P3A6;//功能設置鍵sbitwei1=P1AQ;//選手號顯示位sbitwei2=P1A1;//時間顯示位sbitwei3=P1A2;ucharcodetable[]={QxcQ,Qxf9,Qxa4,QxbQ,Qx99,Qx92,Qx82,Qxf8,Qx8Q,Qx9Q};//Q到9的代碼uchartime[]={QxQ1,QxQQ};//時間設置緩沖區uchartimehuanchong;ucharts,ql;//選手已被選中標志ucharnumber,bz,shijian;//選手號/若bz=1，則處于時間設置狀態，即標志位/倒計時的時間ucharqiangda;//是否可以搶答標志位，為1，則八路搶答器有效uchardaojishi;//倒計時標志voiddelayms(uintxms){uinti,j;for(i=xms;i>Q;i--) //i=xms即延時約xms毫秒for(j=11Q;j>Q;j--);}voidtimedisplay()//時間顯示{time[1]=(shijian%6Q)%1Q;//低位time[Q]=(shijian%6Q)/1Q;//高位wei2=Q;PQ=table[time[Q]];delayms(1);wei2=1;wei3=Q;PQ=table[time[1]];delayms(1);wei3=1;}voidnumberdisplay()〃選手號顯示{wei1=Q;PQ=table[number];delayms(l);wei1=1;}voidkeyscan(){uchartemp;if((function==0)&&(daojishi==0))〃若時間設置鍵按下{delayms(10);if((function==0)&&(daojishi==0)){bz=!bz;//取反，決定是否處于時間設置狀態while(function==0);//等待按鍵放開}}if((kaishi==0)||(qingling=0))//開始或結束鍵或加鍵或減鍵按下{delayms(10);if((kaishi==0)||(qingling==0)){if(bz==1)//處于時間設置狀態{if(kaishi==0){shijian++;timehuanchong=shijian;while(kaishi==0);}if(qingling==0){shijian--;timehuanchong=shijian;while(qingling==0);}}if((kaishi==0)&&(bz==0)&&(daojishi==0))//若開始鍵被按下，而且時間設置完畢{ql=0;qiangda=1;//設立搶答標志shijian=timehuanchong;if((qingling==0)&&(bz==0)&&(daojishi==1))//若清零鍵被按下，而且時間設置完畢{ql=1；qiangda=0; 〃搶答標志撤消number=0; 〃選手編號清為零TR1=0;laba=1;ts=0; 〃選手已被選中標志撤消daojishi=0;}}}if((P2!=0xff)&&(number==0)&&(bz=0))//八路搶答器按鈕按下，而且原先沒有選手按下{delayms(10);if((P2!=0xff)&&(number==0)){if(qiangda==1)//若允許搶答{temp=~P2;while(temp!=0){temp=temp>>1;number++;ts=1;}}TR1=1;//開定時器}while(P2!=0xff);//等待按鍵放開}}voidtimer1()interrupt3{ucharn;〃定時200次，實現1S定時TH1=0xed;〃裝定時器初值實現5ms定時TL1=0xff;n++;if(n>=200){n=0;daojishi=1;if(shijian)//若倒計時時間不為0{shijian--;}if((shijian==0)&&(ql==0)){laba=~laba;//喇叭報警}}}voidtimer0()interrupt1{TH0=0xed;〃裝定時器初值實現5ms定時TL0=0xff;if((ts==1)||(bz==1)){timedisplay();}//選手號顯示numberdisplay();//時間顯示}voidmain(){number=0;bz=0;TMOD=0x11;〃設置為T1定時器TH1=0xed;〃裝定時器初值TL1=0xff;TH0=0xed;〃裝定時器初值TL0=0xff;ET1=1;ET0=1;EA=1;TR1=0;//開中斷TR0=1;//開中斷shijian=0x0a;timehuanchong=shijian;while(1){keyscan();}}\'CC選三DpyAtnl― ilt=AAAAAAA/^hAA/-.■ <K=IX修w?m\f.■,■■■■■,■P1.O(T-)CAD瀘二?1.?.T2EX)Pl.2(An2)?().2PL3@D3)p{).3Pl.4fAD4)P0.4P：.5*O闿^_D5)P0.5PkMflSO)P1.7(SCK)(AD7}?&.-P3.3CIX-'：CA8)P2.：?3.2JZ\TO)(A勇F"(A1D)P2.2P3.5(T1)(A11)P23P3.^I(TO)(A:2)