Lpc2000

I have this code for the ADC in burst mode. The ISR is called 
continually, but I don't see a value for the result. Gurus enlighten 
me, what am I doing wrong?


#include <lpc21xx.h>

void AD_ISR (void) __irq
{
  unsigned val,chan;
  static unsigned result[8];
  val = ADDR;
  chan = ((val >>0x18) & 0x07);
  val =  (val >> 6) & 0x03FF; //Extract the A/D result
  result[chan] = val;
  VICVectAddr = 0; //clear the IRQ function address
}								
							
	                 

int main(void)
{
  PINSEL1 = 0x003FF000;
  PINSEL0 = 0x03F00000;
  
  ADCR = 0x00270204; // Setup A/D: 10-bit AIN0 @ 4.2MHz
  VICVectCntl0 = 0x00000032; //connect A/D to slot 0
  VICVectAddr0 = (unsigned)AD_ISR; //pass the address of the IRQ 
into the VIC slot
  VICIntEnable = 0x00040000; //enable interrupt

while(1)
{
;
}
}