Lpc2000

Here is the IRQ code for the timer.
We dont use interrupts for the capture pin. (We tried once, but it 
then stuffed up IRQ serial comms).
When the pin fires it updates the capture pin counter and then we 
read this at our leisure.

I had a look at the errata. The only thing it mentions about a 
capture pin is for pin P0.21. We use P0.16, CAP0.2


void IRQTickTimer() __attribute__ ((interrupt));
void IRQTickTimer()
{
	T0IR = 1;		// Clear interrupt flag
	VICVectAddr = 0;	// Acknowledge Interrupt
}