Help me in scan key

[Gusest]

Pls help me this code below can not display key:

#include <18F4550.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

//Keypad connection:
#define col0 PIN_B4
#define col1 PIN_B5
#define col2 PIN_B6
#define col3 PIN_B7
#define row0 PIN_B0
#define row1 PIN_B1
#define row2 PIN_B2
#define row3 PIN_B3

// Keypad layout:
char const KEYS[4][4] = {{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}};

#define KBD_DEBOUNCE_FACTOR 33 // Set this number to apx n/333 where
// n is the number of times you expect
// to call kbd_getc each second



void kbd_init() {
}


short int ALL_ROWS (void)
{
if (input (row0) & input (row1) & input (row2) & input (row3))
return (0);
else
return (1);
}



char kbd_getc( ) {
static byte kbd_call_count;
static short int kbd_down;
static char last_key;
static byte col;

byte kchar;
byte row;

kchar='\0';
if(++kbd_call_count>KBD_DEBOUNCE_FACTOR) {
switch (col) {
case 0 :
output_low(col0);
output_high(col1);
output_high(col2);
output_high(col3);
break;
case 1 :
output_high(col0);
output_low(col1);
output_high(col2);
output_high(col3);
break;
case 2 :
output_high(col0);
output_high(col1);
output_low(col2);
output_high(col3);
break;
case 3 :
output_high(col0);
output_high(col1);
output_high(col2);
output_low(col3);
break;
}

if(kbd_down) {
if(!ALL_ROWS()) {
kbd_down=false;
kchar=last_key;
last_key='\0';
}
} else {
if(ALL_ROWS()) {
if(!input (row0))
row=0;
else if(!input (row1))
row=1;
else if(!input (row2))
row=2;
else if(!input (row3))
row=3;
last_key =KEYS[row][col];
kbd_down = true;
} else {
++col;
if(col==3)
col=0;
}
}
kbd_call_count=0;
}
return(kchar);
}
void main()
{
kbd_init();
while(TRUE)
{
printf(" Keypad is press is:\n");
getc();
printf("%c,%d",kbd_getc(),kbd_getc());
}
}

[PCM programmer]

[virtual33]

Now It running ok. Because I use Pic18F thus no need use kbd_init(); function
// This code is editted from CCS C forum by virtual33
#include <18F4550.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

//Keypad connection:
#define col0 PIN_B4
#define col1 PIN_B5
#define col2 PIN_B6
#define col3 PIN_B7
#define row0 PIN_B3
#define row1 PIN_B2
#define row2 PIN_B1
#define row3 PIN_B0

// Keypad layout:
char const KEYS[4][4] = {{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}};

#define KBD_DEBOUNCE_FACTOR 33 // Set this number to apx n/333 where
// n is the number of times you expect
// to call kbd_getc each second



//void kbd_init() {
//port_b_pullups(TRUE);
//}


short int ALL_ROWS (void)
{
if (input (row0) & input (row1) & input (row2) & input (row3))
return (0);
else
return (1);
}



char kbd_getc( ) {
static byte kbd_call_count;
static short int kbd_down;
static char last_key;
static byte col;

byte kchar;
byte row;

kchar='\0';
if(++kbd_call_count>KBD_DEBOUNCE_FACTOR) {
switch (col) {
case 0 :
output_low(col0);
output_high(col1);
output_high(col2);
output_high(col3);
break;
case 1 :
output_high(col0);
output_low(col1);
output_high(col2);
output_high(col3);
break;
case 2 :
output_high(col0);
output_high(col1);
output_low(col2);
output_high(col3);
break;
case 3 :
output_high(col0);
output_high(col1);
output_high(col2);
output_low(col3);
break;
}

if(kbd_down) {
if(!ALL_ROWS()) {
kbd_down=false;
kchar=last_key;
last_key='\0';
}
} else {
if(ALL_ROWS()) {
if(!input (row0))
row=0;
else if(!input (row1))
row=1;
else if(!input (row2))
row=2;
else if(!input (row3))
row=3;
last_key =KEYS[row][col];
kbd_down = true;
} else {
++col;
if(col==4)
col=0;
}
}
kbd_call_count=0;
}
return(kchar);
}
void main()
{
char k;

// lcd_init();
// kbd_init();

// lcd_putc("\fReady...\n");

while (TRUE) {
k=kbd_getc();
if(k!=0)
printf("Key %c is pressed \n\r", k);
//if(k=='*')
// lcd_putc('\f');
//else
// lcd_putc(k);
}
}

[PCM programmer]

You still need pull-ups on the Row pins.