interrupt.c

英培特ARM教学平台EDUKIT-III

#include "s3c2410.h"
#include "machine.h"
#include "uart.h"

/* gpio init */
void board_init(void)
{
	GPFCON = vGPFCON;
	GPFUP = vGPFUP;
	GPHCON = vGPHCON;
	GPHUP = vGPHUP;
	EXTINT0 = vEXTINT0;
	EXTINT1 = vEXTINT1;
}

/* irq init */
void init_irq(void)
{
	SRCPND = SRCPND;
	INTPND = INTPND;

	GPFCON = (GPFCON & 0xffcc) | (1<<5) | (1<<1);
	GPGCON = (GPGCON & 0xff3fff3f) | (1<<23) | (1<<7);

	EINTPEND = 0xffffff;
	SRCPND = (1<<0 | 1<<5);
	INTPND = (1<<0 | 1<<5);

	EINTMASK &= (~(1<<11));
	INTMSK &= (~(1<<0 | 1<<5));
}

/* irq handle */
void int_handle(void)
{
	unsigned long key = INTOFFSET;

	switch (key) {
		case 0:
			putstr("EINT0, SB1202 pressed!\n\r");
			break;
		case 5:
			putstr("EINT11, SB1203 pressed!\n\r");
			break;
		default:
			putstr("Interrupt unknown!\n\r");
			break;
	}

	if (key == 5) {
		EINTPEND = 1<<11;
	}
	SRCPND = 1 << key;
	INTPND = INTPND;
}