HI Can any one help me why this bit of code is only partialy

[deltatech]

HI Can any one tell me why this bit of code is only partialy working .

when i press PINA2 it goes to scan_lite() then when i press PINA3 it stops as Global Variable ALARM_ON is set to False . But this only works for two presses of PINA3 after that all the leds stay off permently . until i reset the PIC and it works again for only two presses . Many thanks for any help as you cac see i am a newbie

[code#include <16F627.h>
#USE DELAY( CLOCK=4000000 ) // Using a 4 Mhz clock //

#byte PORTA = 0xFF // output port D definition //
#bit PIR = PORTA.0 //definitions to actual outputs
#bit WINDOW = PORTA.1
#bit DOOR = PORTA.3


#bit SET_ALARM_BUTTON =PORTA.2 //switch
#bit RESET_ALARM_BUTTON =PORTA.3 //switch


#byte PINB = 0x06 // input port B definition //
#bit STROBE_LITE = PINB.4 // OUTPUT //
#bit BUZZER = PINB.5 // OUTPUT //
#bit SPEAKER = PINB.6 // OUTPUT //

int1 ALARM_ON=FALSE;

int SET_ALARM();
void scan_lite();


void SET_ALARM();
void scan_lite();
int1 movingRight=FALSE;

void main(void)
{
set_tris_a(0xFF); // Set port A to all input
set_tris_b(0x00); // Set port B to all output



while(TRUE)
{
SET_ALARM();// call function
scan_lite();// call function

}

}// end of main

void scan_lite() // funtion to do a knight rider scan
{
int data; data = 1;

while(ALARM_ON)
{
output_b(data);

if(movingRight)
data >>= 1;
else
data <<= 1;

if(data == 0x04)
movingRight = TRUE;
else if(data == 0x01)
movingRight = FALSE;
delay_ms(50);
if(input(PIN_A3)) // check PIN3 reset global ALARM_ON
ALARM_ON=FALSE;
}// end of while

} // end of scan_lite


int SET_ALARM()
{
if (input(PIN_A2))// check PINA2 and set global ALARM_ON
ALARM_ON=TRUE;



} // end od SET_ALARM




[/code]

[PCM programmer]

Look at your #byte statement for Port A. Is it done correctly ?
The #byte statement is used to declare the address of a PIC
register so you can read or write to it directly with a line of code.
What is the address of the PortA register in the PIC ?

Get the 16F627 data sheet and look in this section to find the address: