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keypad driver..coding from port d to port c

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iedchan

Joined: 01 Jun 2007
Posts: 2

keypad driver..coding from port d to port c

Posted: Sat Jun 02, 2007 2:16 am

anyone knows how to change this keypad driver..so that i could used port c instead of port d?

Code:

//#byte port_d = 0x08
char get_key(void)
{
char t;
while (1) {
output_d (input_d() | 0xFF);

output_bit(PIN_D4,0);
if (input (PIN_D0) ==0);{
delay_ms(10);
return 'A';
}
if (input (PIN_D1) ==0){
delay_ms(10);
return '7';
}

if (input (PIN_D2) ==0){
delay_ms(10);
return '4';
}
if (input (PIN_D3) ==0){
delay_ms(10);
return '1';
}
output_d (input_d() | 0xFF);

output_bit(PIN_D5,0);
if (input (PIN_D0) ==0);{
delay_ms(10);
return '0';
}
if (input (PIN_D1) ==0){
delay_ms(10);
return '8';
}
if (input (PIN_D2) ==0){
delay_ms(10);
return '5';
}
if (input (PIN_D3) ==0){
delay_ms(10);
return '2';
}
output_d (input_d() | 0xFF);

output_bit(PIN_D6,0);
if (input (PIN_D0) ==0);{
delay_ms(10);
return 'B';
}
if (input (PIN_D1) ==0){
delay_ms(10);
return '9';
}
if (input (PIN_D2) ==0){
delay_ms(10);
return '6';
}
if (input (PIN_D3) ==0){
delay_ms(10);
return '3';
}
output_d (input_d() | 0xFF);

output_bit(PIN_D7,0);
if (input (PIN_D0) ==0);{
delay_ms(10);
return 'C';
}
if (input (PIN_D1) ==0){
delay_ms(10);
return 'D';
}
if (input (PIN_D2) ==0){
delay_ms(10);
return 'E';
}
if (input (PIN_D3) ==0){
delay_ms(10);
return 'F';
}
else return '<';
}
}

inservi

Joined: 13 May 2007
Posts: 128

Posted: Sat Jun 02, 2007 6:44 am

Hello,

You can try this code !

Code:

#byte port_c = 0xF83 // depending on the microcontroleur 0xF83 is for a 18F452
#define keyboard port_c
#define keyboard_line0 PIN_C0
#define keyboard_line1 PIN_C1
#define keyboard_line2 PIN_C2
#define keyboard_line3 PIN_C3
#define keyboard_row0 PIN_C4
#define keyboard_row1 PIN_C5
#define keyboard_row2 PIN_C6
#define keyboard_row3 PIN_C7
#define setPort output_c (keyboard | 0xFF);

char get_key(void){

while (true) {
setPort

output_bit(keyboard_row0,0);
if (input (keyboard_line0) ==0);{
delay_ms(10);
return 'A';
}
if (input (keyboard_line1) ==0){
delay_ms(10);
return '7';
}

if (input (keyboard_line2) ==0){
delay_ms(10);
return '4';
}
if (input (keyboard_line3) ==0){
delay_ms(10);
return '1';
}
setPort

output_bit(keyboard_row1,0);
if (input (keyboard_line0) ==0);{
delay_ms(10);
return '0';
}
if (input (keyboard_line1) ==0){
delay_ms(10);
return '8';
}
if (input (keyboard_line2) ==0){
delay_ms(10);
return '5';
}
if (input (keyboard_line3) ==0){
delay_ms(10);
return '2';
}
setPort

output_bit(keyboard_row2,0);
if (input (keyboard_line0) ==0);{
delay_ms(10);
return 'B';
}
if (input (keyboard_line1) ==0){
delay_ms(10);
return '9';
}
if (input (keyboard_line2) ==0){
delay_ms(10);
return '6';
}
if (input (keyboard_line3) ==0){
delay_ms(10);
return '3';
}
setPort

output_bit(keyboard_row3,0);
if (input (keyboard_line0) ==0);{
delay_ms(10);
return 'C';
}
if (input (keyboard_line1) ==0){
delay_ms(10);
return 'D';
}
if (input (keyboard_line2) ==0){
delay_ms(10);
return 'E';
}
if (input (keyboard_line3) ==0){
delay_ms(10);
return 'F';
}
else return '<';
}
}

I'm not try it but it is compiled without error.
Normaly, you need to change the #byte and the #define for use an other port.

dro
_________________
in médio virtus

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