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PIC C18 External Interrupts INT0

Started by natraj20 October 31, 2010
Hello guys,

Problem with the very basics.
I am stuck with the external interrupt INT0 at RB0.
Controller - PIC 18F47J53
MPLAB IDE, Microchip C Compiler

I could not figure out what is wrong with the following code. Kindly help
me out to make this work!!

#include <p18f47j53.h>
#include <delays.h>
#include <portb.h>

#pragma config OSC = HS
#pragma config WDTEN = OFF
#pragma config XINST = OFF
void InterruptServiceHigh(void);
void InterruptServiceLow(void);

int x;

void main(void)
{

INTCONbits.INT0IF = 0;
INTCONbits.INT0IE = 1;
INTCON2bits.INTEDG0 = 1;

INTCON2bits.RBPU = 0;
//EnablePullups();
TRISE = 0;
TRISBbits.TRISB0 = 1;
RCONbits.IPEN = 1;
INTCONbits.GIE = 1;
INTCONbits.PEIE = 1;

while(1)	
{
PORTE = 0x01;
}

}

// High priority interrupt vector
#pragma code InterruptVectorHigh = 0x08
void InterruptVectorHigh(void)
{
_asm
goto InterruptServiceHigh
_endasm
}

// Low priority interrupt vector
#pragma code InterruptVectorLow = 0x18
void InterruptVectorLow(void)
{
_asm
goto InterruptServiceLow
_endasm
}

// Interrupt Service Routine
// Interrupt pragma for high priority
#pragma code
#pragma interrupt InterruptServiceHigh
void InterruptServiceHigh()
{
// function statements

if(INTCONbits.INT0IF)
{
x = 0;
while(x <= 2)
{
PORTE = 0x01;
Delay10KTCYx(120);	// Delay of 1 sec with 12 MHz
PORTE = 0x02;
Delay10KTCYx(120);
x++;
}
INTCONbits.INT0IF = 0;
}

// return from high priority interrupt
}


// Interrupt pragma for low priority
#pragma code
#pragma interrupt InterruptServiceLow
void InterruptServiceLow()
{
// function statements

// return from low priority interrupt

}

	   
					
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