int_handler.c

来自「自己写的ARM移植代码」· C语言 代码 · 共 39 行

/**************************************************************/
/*     File: int_handler.c                                    */
/*  Purpose: IRQ interrupt handler code                       */
/**************************************************************/

/*
** Copyright (C) ARM Limited, 2000. All rights reserved.
*/




/* #include "rpsarmul.h" */ /* EITHER: to use with the ARMulator */
     /* OR: to use with the Integrator board */


/******************************************************************************
* IRQHandler                                                                  *
*                                                                             *
* This function handles IRQ interrupts.  In this example, these may come from *
* Timer 1 or Timer 2.                                                         *
*                                                                             *
* This handler simply clears the interrupt and sets corresponding flags.      *
* These flags are then checked by the main application.                       *
*                                                                             *
*******************************************************************************/
#include "s3c4510b.h"

void __irq IRQ_Handler(void)
{
 unsigned long irqstatus;
 irqstatus=*ARM_INTPEND;
   *ARM_INTPEND=0X03;
 if(irqstatus & 0x01) *ARM_IOPDATA=0X0F;
   else if(irqstatus & 0x02) *ARM_IOPDATA=0XF0;
}