抢答器完整程序

#include<reg51.h>#defineucharunsignedchar#defineuintunsignedintsbitlaba=P3A3;//喇叭sbitkaishi=P3A4;//开始sbitqingling=P3A5;//清零sbitfunction=P3A6;//功能设置键sbitwei1=P1AQ;//选手号显示位sbitwei2=P1A1;//时间显示位sbitwei3=P1A2;ucharcodetable[]={QxcQ,Qxf9,Qxa4,QxbQ,Qx99,Qx92,Qx82,Qxf8,Qx8Q,Qx9Q};//Q到9的代码uchartime[]={QxQ1,QxQQ};//时间设置缓冲区uchartimehuanchong;ucharts,ql;//选手已被选中标志ucharnumber,bz,shijian;//选手号/若bz=1，则处于时间设置状态，即标志位/倒计时的时间ucharqiangda;//是否可以抢答标志位，为1，则八路抢答器有效uchardaojishi;//倒计时标志voiddelayms(uintxms){uinti,j;for(i=xms;i>Q;i--) //i=xms即延时约xms毫秒for(j=11Q;j>Q;j--);}voidtimedisplay()//时间显示{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()〃选手号显示{wei1=Q;PQ=table[number];delayms(l);wei1=1;}voidkeyscan(){uchartemp;if((function==0)&&(daojishi==0))〃若时间设置键按下{delayms(10);if((function==0)&&(daojishi==0)){bz=!bz;//取反，决定是否处于时间设置状态while(function==0);//等待按键放开}}if((kaishi==0)||(qingling=0))//开始或结束键或加键或减键按下{delayms(10);if((kaishi==0)||(qingling==0)){if(bz==1)//处于时间设置状态{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))//若开始键被按下，而且时间设置完毕{ql=0;qiangda=1;//设立抢答标志shijian=timehuanchong;if((qingling==0)&&(bz==0)&&(daojishi==1))//若清零键被按下，而且时间设置完毕{ql=1；qiangda=0; 〃抢答标志撤消number=0; 〃选手编号清为零TR1=0;laba=1;ts=0; 〃选手已被选中标志撤消daojishi=0;}}}if((P2!=0xff)&&(number==0)&&(bz=0))//八路抢答器按钮按下，而且原先没有选手按下{delayms(10);if((P2!=0xff)&&(number==0)){if(qiangda==1)//若允许抢答{temp=~P2;while(temp!=0){temp=temp>>1;number++;ts=1;}}TR1=1;//开定时器}while(P2!=0xff);//等待按键放开}}voidtimer1()interrupt3{ucharn;〃定时200次，实现1S定时TH1=0xed;〃装定时器初值实现5ms定时TL1=0xff;n++;if(n>=200){n=0;daojishi=1;if(shijian)//若倒计时时间不为0{shijian--;}if((shijian==0)&&(ql==0)){laba=~laba;//喇叭报警}}}voidtimer0()interrupt1{TH0=0xed;〃装定时器初值实现5ms定时TL0=0xff;if((ts==1)||(bz==1)){timedisplay();}//选手号显示numberdisplay();//时间显示}voidmain(){number=0;bz=0;TMOD=0x11;〃设置为T1定时器TH1=0xed;〃装定时器初值TL1=0xff;TH0=0xed;〃装定时器初值TL0=0xff;ET1=1;ET0=1;EA=1;TR1=0;//开中断TR0=1;//开中断shijian=0x0a;timehuanchong=shijian;while(1){keyscan();}}\'CC选三DpyAtnl― ilt=AAAAAAA/^hAA/-.■ <K=IX修w・m\f.■,■■■■■,■P1.O(T-)CAD泸二?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)