/* This routine configures device-specific details about interrupts */
void enableBalloonIRQ( int interval_cycles, ptr_to_function newISR )
{
registerISR( IRQ_COUNTER, newISR ); /* specify which ISR to call with COUNTER interrupts */
*pCOUNTER = -interval_cycles; /* initial counter value */
*pCOUNTER_RELOAD = -interval_cycles; /* on overflow, start with this value */
*pCOUNTER_STATUS = 1; /* Device: send interrupts, clear existing interrupt */
enableInterrupt( IRQ_COUNTER ); /* CPU: allow it to receive COUNTER interrupts */
}
void enableKeyIRQ( int keys_to_watch, ptr_to_function newISR )
{
registerISR( IRQ_KEY, newISR );
/* specify which ISR to call with KEY interrupts */
*pKEY_IRQENABLE = keys_to_watch;
/* Device: to send interrupts for KEY3,KEY2 */
enableInterrupt( IRQ_KEY );
/* CPU: allow it to receive KEY interrupts */
}
void initTimer(void) {
registerISR(8, timerISR); /* register ISR i vector table */
setClock(50,40); /* set clock to 200ms */
startClock(); /* start clock */
}
