irq.c

iic总线控制led,我就这是根据linux下面的驱动自己改的

/////////////////////////////////////////
////////////////////////////////////////
/*--------------------------------------------------------------------*/
//enable and disable the irq
//
#include "lib.h"
#include "../inc/reg2410.h"
#define IRQMOD 0x0
#define FRQMOD 0x1

#define BIT_IIC 0X08000000

	
void enable_IRQ(void)
{//just set the mask and submsk register!
register int temp;	
	__asm{
		mrs temp,CPSR
		bic temp,temp,#0x80
		msr CPSR_c,temp
	}
	rINTMOD    = IRQMOD;
    rINTMSK &= ~BIT_IIC;
}


void disable_IRQ(void)
{//reset
register int temp;
	__asm{
		mrs temp,CPSR
		orr temp,temp,#0x80
		msr CPSR_c,temp
	}
}



	
/*---------------------------------------------*/