#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit wela=P2^0;
sbit dula=P2^1;
uchar temp,num;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x7b,0x71
};
void delay(uchar z)
{
uchar x,y;
for(x=z;x>0;x--)
{
for(y=110;y>0;y--);
}
}
void main()
{
wela=1;
P0=0x00;
wela=0;
dula=1;
P0=0x00;
dula=0;
while(1)
{
P3=0xfe;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)//可改为if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)//可改为if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee: num=3;break;
case 0xde: num=2;break;
case 0xbe: num=1;break;
case 0x7e: num=0;break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
dula=1;
P0=table[num];
dula=0;
}
}
P3=0xfd;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xed: num=7;break;
case 0xdd: num=6;break;
case 0xbd: num=5;break;
case 0x7d: num=4;break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
dula=1;
P0=table[num];
dula=0;
}
}
P3=0xfb;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb: num=11;break;
case 0xdb: num=10;break;
case 0xbb: num=9;break;
case 0x7b: num=8;break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
dula=1;
P0=table[num];
dula=0;
}
}
P3=0xf7;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xe7: num=15;break;
case 0xd7: num=14;break;
case 0xb7: num=13;break;
case 0x77: num=12;break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
dula=1;
P0=table[num];
dula=0;
}
}
}
}