void __init arch_init_irq(void)
{
int i;
clear_c0_status(0xff04); /* clear ERL */
set_c0_status(0x0400); /* set IP2 */
/* Set up INTC irq
*/
for (i = 0; i < 32; i++) {
disable_intc_irq(i);
set_irq_chip_and_handler(i, &intc_irq_type, handle_level_irq);
}
/* Set up DMAC irq
*/
for (i = 0; i < NUM_DMA; i++) {
disable_dma_irq(IRQ_DMA_0 + i);
set_irq_chip_and_handler(IRQ_DMA_0 + i, &dma_irq_type, handle_level_irq);
}
/* Set up GPIO irq
*/
for (i = 0; i < NUM_GPIO; i++) {
disable_gpio_irq(IRQ_GPIO_0 + i);
set_irq_chip_and_handler(IRQ_GPIO_0 + i, &gpio_irq_type, handle_level_irq);
}
}
/*
* you want to use this!
*/
int calcwindspeed(){
int curtick = 0;
int speed = 0;
disable_gpio_irq(2,13);
curtick = cnttick;
cnttick = 0;
float div = Chip_TIMER_ReadCount(LPC_TIMER2)/ticksPerSecond;
Chip_TIMER_Reset(LPC_TIMER2);
enable_gpio_irq(2,13);
DBG("div:%f count:%d\n",div,curtick);
speed = curtick*(2.25/(div))*1.609344*100; //mph to km/h to 100m/h
return speed;
}
static void shutdown_gpio_irq(unsigned int irq)
{
disable_gpio_irq(irq);
}
