matrix key——51程序

unsigned char segdata[16] ={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
unsigned char bitdata[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char tempdata[8] = 0x0;

unsigned char key_scan()
{
unsigned char keyvalue;
KEYPORT = 0xf0;
if(0xf0 != KEYPORT)
{
delay_ms(10);
if(0xf0 != KEYPORT)
{
KEYPORT = 0xfe;
if(0xfe != KEYPORT)
{
keyvalue = 0xfe;
if(0xfe != KEYPORT)
{
keyvalue = KEYPORT;
keyvalue &= 0xf0;
keyvalue += 0x0e;		//过滤干扰
while(0xfe != KEYPORT);
delay_ms(10);
while(0xfe != KEYPORT);
return keyvalue;
}
}
KEYPORT = 0xfd;
if(0xfd != KEYPORT)
{
keyvalue = KEYPORT;
keyvalue &= 0xf0;
keyvalue += 0x0d;
while(0xfd != KEYPORT);
delay_ms(10);
while(0xfd != KEYPORT);
return keyvalue;
}
KEYPORT = 0xfb;
if(0xfb != KEYPORT)
{
keyvalue = KEYPORT;
keyvalue &= 0xf0;
keyvalue += 0x0b;
while(0xfb != KEYPORT);
delay_ms(10);
while(0xfb != KEYPORT);
return keyvalue;
}
KEYPORT = 0xf7;
if(0xf7 != KEYPORT)
{
keyvalue = KEYPORT;
keyvalue &= 0xf0;
keyvalue += 0x07;
while(0xf7 != KEYPORT);
delay_ms(10);
while(0xf7 != KEYPORT);
return keyvalue;
}
}
}
return 0xff;
}

unsigned char key_pro()
{
unsigned char keynum;
keynum = key_scan();
switch(keynum)
{
case 0x7e:return 0;
case 0xbe:return 1;
case 0xde:return 2;
case 0xee:rerurn 3;
case 0x7d:return 4;
case 0xbd:return 5;
case 0xdd:return 6;
case 0xed:return 7;
case 0x7b:return 8;
case 0xbb:return 9;
default:return 0xff;

}
}

void matrix()
{
unsigned char key;
key = key_pro();
if(0xff != key)
{
tempdata[0] = segdata[key / 16];
tempdata[1] = segdata[key % 16];
}
}