#include<port.h>
#include"var_extern.h"
#include<intrins.h>
//p1=row
//p2=col
bdata unsigned char row_no,col_no;
sbit col_no0=col_no^0;
bit debounce=1;
void delay(unsigned int itime)
{
int i,j;
for(i=0;i<1275;i++)
{
for(j=0;j<itime;j++){}
}
}
void col_check()
{
unsigned char i;
for(i=0;i<8;i++)
{
if(col_no0==0)
{
break;
}
col_no=col_no>>1;
}
col_no=i;
}
unsigned char key_scan()
{
unsigned char temp,i,key=100;
col=0xff;
row=0x00;
while(col==0xff)
{
}
temp=col;
delay(20);
while(col==0xff)
{
}
if(temp!=col)
{
debounce=0;
key=100;
return key;
}
else
{
while(col==0xff)
{
}
temp=col;
delay(10);
while(col==0xff)
{
}
if(temp!=col)
{
debounce=0;
key=100;
return key;
}else
{

temp=0xfe;
for(i=0;i<8;i++)
{
row=_crol_(temp,i);
if(col!=0xff)
{
col_no=col;
col_check();
key=key_matrix[i][col_no];
col=0xff;
row=0x00;
while(col!=0xff)
{
}
return key;

}
}
}
}

}
void keypad_init()
{
col=0xff;
row=0x00;
}