#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0x67};
void delay(uint m)
{ uint i,j;
for(i=m;i>0;i--)
for(j=110;j>0;j--);
}
void display(uchar num)
{ wela=1;
P0=0xc0;
wela=0;
P0=0XFF;
dula=1;
P0=table[num];
dula=0;
}
void keycans()
{ uchar a,key,c;
P3=0X0f;
if(P3!=0X0f)
{ delay(10);
if(P3!=0x0f)
{
a=P3;
P3=0Xf0;
c=P3;
a=a|c;
switch(a)
{case 0xee:key=1;break;
case 0xde:key=2;break;
case 0xbe:key=3;break;
case 0x7e:key=4;break;
case 0xed:key=5;break;
case 0xdd:key=6;break;
case 0xbd:key=7;break;
case 0x7d:key=8;break;
case 0xeb:key=9;break;
case 0xdb:key=10;break;
case 0xbb:key=11;break;
case 0x7b:key=12;break;
case 0xe7:key=13;break;
case 0xd7:key=14;break;
case 0xb7:key=15;break;
case 0x77:key=16;break;
}
while(!a);
display(key);
}
}
}
void main()
{
while(1)
keycans();
}