1、#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit s1=P1^4;
sbit s2=P1^5;
sbit s3=P1^6;
sbit s4=P1^7;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void keycan()
{
uint i;
if(s1==0)
{
delay(30);
if(s1==0)
{
i++;
switch(i)
{
case 1:
P0=0x7f;
break;
case 2:
P0=0xbf;
break;
case 3:
P0=0xdf;
break;
case 4:
P0=0xef;
break;
case 5:
P0=0xf7;
break;
case 6:
P0=0xfb;
break;
case 7:
P0=0xfd;
break;
case 8:
P0=0xfe;
break;
default:i=0;
}
while(!s1);
}
}
if(s2==0)
{
delay(30);
if(s2==0)
{
i++;
switch(i)
{
case 1:
P0=0xfd;
break;
case 2:
P0=0xfb;
break;
case 3:
P0=0xf7;
break;
case 4:
P0=0xef;
break;
case 5:
P0=0xdf;
break;
case 6:
P0=0xbf;
break;
case 7:
P0=0x7f;
break;
case 8:
P0=0xfe;
break;
default:i=0;
}
while(!s2);
}
}
}
void keycan1()
{
uint i;
if(s3==0)
{
delay(30);
if(s3==0)
{
i++;
switch(i)
{
case 1:
P2=0x7f;
break;
case 2:
P2=0xbf;
break;
case 3:
P2=0xdf;
break;
case 4:
P2=0xef;
break;
case 5:
P2=0xf7;
break;
case 6:
P2=0xfb;
break;
case 7:
P2=0xfd;
break;
case 8:
P2=0xfe;
break;
default:i=0;
}
while(!s3);
}
}
if(s4==0)
{
delay(30);
if(s4==0)
{
i++;
switch(i)
{
case 1:
P2=0xfd;
break;
case 2:
P2=0xfb;
break;
case 3:
P2=0xf7;
break;
case 4:
P2=0xef;
break;
case 5:
P2=0xdf;
break;
case 6:
P2=0xbf;
break;
case 7:
P2=0x7f;
break;
case 8:
P2=0xfe;
break;
default:i=0;
}
while(!s4);
}
}
}
void main()
{
P0=0xfe;
P2=0xfe;
while(1)
{
keycan();
keycan1();
}
}
