单片机八路抢答器设计 -

#include<reg51.h>
#defineuint unsigned int
#defineuchar unsigned char
sbitkey1=P3^0;
sbit k1=P1^0;
sbit k2=P1^1;
sbit k3=P1^2;
sbit k4=P1^3;
sbit k5=P1^4;
sbit k6=P1^5;
sbit k7=P1^6;
sbitk8=P1^7;
sbitbeep=P3^7;
uchartemp;
ucharaa,shi,ge,i;
uintn;
ucharcode table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77};
voiddisplay(ucharshi,ucharge);
voiddis(uchari);
voiddelay(uint z);
voidinit();
voidmain()
{
init( );
while(1)
{
if(key1==0)
{
delay(10);
if(key1==0)
{
while(!key1);
TR0=1;
n=1;
}
}
display(shi,ge);
dis(i);
if(n==1){
if(k1==0){ delay(10);if(k1==0){while(!k1)i=1;TR0=0;n=0;beep=1;delay(500);beep=0;}}
if(k2==0){ delay(10);if(k2==0){while(!k2) i=2;TR0=0;n=0;beep=1;delay(500);beep=0;}}
if(k3==0){ delay(10);if(k3==0){while(!k3)i=3;TR0=0;n=0;beep=1;delay(500);beep=0;}}
if(k4==0){ delay(10);if(k4==0){while(!k4)i=4;TR0=0;n=0;beep=1;delay(500);beep=0;}}
if(k5==0){ delay(10);if(k5==0){while(!k5) i=5;TR0=0;n=0;beep=1;delay(500);beep=0;}}
if(k6==0){ delay(10);if(k6==0){while(!k6)i=6;TR0=0;n=0;beep=1;delay(500);beep=0;}}
if(k7==0){ delay(10);if(k7==0){while(!k7)i=7;TR0=0;n=0;beep=1;delay(500);beep=0;}}
if(k8==0){ delay(10);if(k8==0){while(!k8) i=8;TR0=0;n=0;beep=1;delay(500);beep=0;}}
}
}
}
voiddelay(uint z)
{
uintx,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
voiddisplay(ucharshi,ucharge)
{
P2=0xbf;
P0=table[shi];
delay(10);
P2=0x7f;
P0=table[ge];
delay(10);
}
voiddis(uchari)
{ P2=0xfe;
P0=table[i];
delay(10);
}
voidinit( )
{
n=0;
temp=30;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
}
voidtimer0( ) interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
if(aa==20)
{
aa=0;
temp--;
if(temp==0)
{ temp=30;
}
shi=temp%100/10;
ge=temp%10;
}
}

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