#define uint unsigned int
#define uchar unsigned char
sbit dula=P1^0;
sbit wela=P1^1;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uint x)
{
uint i,j;
for(i=x;i>0;i--)
for(j=110;j>0;j--);
}
void display(uchar num)
{
P0=table[num];
dula=1;
dula=0;
}
void key()
{
uchar temp,key;
P2=0xfe;
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(20);
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P2;
switch(temp)
{
case 0xee:key=0;break;
case 0xde:key=1;break;
case 0xbe:key=2;break;
case 0x7e:key=3;break;
}
while(temp!=0xf0)
{
temp=P2;
temp=temp&0xf0;
}
display(key);
}
}
P2=0xfd;
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(20);
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P2;
switch(temp)
{
case 0xed:key=4;break;
case 0xdd:key=5;break;
case 0xbd:key=6;break;
case 0x7d:key=7;break;
}
while(temp!=0xf0)
{
temp=P2;
temp=temp&0xf0;
}
display(key);
}
}
P2=0xfb;
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(20);
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P2;
switch(temp)
{
case 0xeb:key=8;break;
case 0xdb:key=9;break;
case 0xbb:key=10;break;
case 0x7b:key=11;break;
}
while(temp!=0xf0)
{
temp=P2;
temp=temp&0xf0;
}
display(key);
}
}
P2=0xf7;
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(20);
temp=P2;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P2;
switch(temp)
{
case 0xe7:key=12;break;
case 0xd7:key=13;break;
case 0xb7:key=14;break;
case 0x77:key=15;break;
}
while(temp!=0xf0)
{
temp=P2;
temp=temp&0xf0;
}
display(key);
}
}
}
void main()
{
P0=0;
dula=1;
dula=0;
P0=0x00;
wela=1;
wela=0;
while(1)
{
key();
}
}