I am a beginner to the ARM series.

I want to use the 3 external interrupts. ENT1 as Fast interrupts and ENT2 and 3 as Vectored interrupt.

I simulated the code in my circuit in ISIS (proteus). none of the interrupt seems to be working.

Is there any problem in the code given below or is there anything i am missing.

Is there any way i can know whether my interrupts are working in keil uvision4.

Code:
#include <LPC21xx.h>
#include "pwm.h"

void FIQ_Handler(void)
{
	IOSET1=0xFF000000;

	EXTINT = (1<<1);// Clear the peripheral interrupt flag for ENT1
}

void EXTINT2VectoredIRQ(void)  __irq	
{
	IOSET1=0xFF000000;

	EXTINT = (1<<2);// Clear the peripheral interrupt flag for ENT2
	VICVectAddr = 0x00000000;
}

void EXTINT3VectoredIRQ(void)  __irq
{

	EXTINT = (1<<3); // Clear the peripheral interrupt flag for ENT3
	VICVectAddr = 0x00000000;
}

int main()
{

   	IODIR1 = 0xFFF00000;
	IODIR0 = 0x00F00000;
//initialize the interrupts
	
	PINSEL0|=0xA00C0055; //enable pin functioning of UART0,I2C0,ENT1,ENT2,ENT3
	VICIntSelect|=0x00008000; //set ENT1 as FIQ
	

	EXTMODE|=0x0E;	   //edge interrupt for ENT1,ENT2 and ENT3
	EXTPOLAR|=0x0E;    //rising edege for all the interrupts

    VICVectCntl0 = 0x00000030; //set ENT2 to vectaddress0 
	VICVectAddr0 = (unsigned long)EXTINT2VectoredIRQ;
	VICVectCntl1 = 0x00000031; //set ENT3 to vectaddress1
	VICVectAddr1 = (unsigned long)EXTINT3VectoredIRQ;
	
	VICIntEnable =(1<<15)|(1<<16)|(1<<17); //enable ENT1,ENT2 and ENT3 interrupts


//-------------------------------------------------


	pwmInit();
	pwmFrequency (10);
	
	while(1)
	{  	
	}


}