ext_irq.c

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

//*----------------------------------------------------------------------------
//*      ATMEL Microcontroller Software Support  -  ROUSSET  -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name           : ext_irq.c
//* Object              : External interrupt handler for irq this file must be
//*                       compiled in ARM mode (32 bits)
//*
//* 1.0 24/10/00 JPP    : Creation
//*----------------------------------------------------------------------------


#include    "parts/m63200/reg_m63200.h"
#include    "parts/m63200/lib_m63200.h"
#include    "targets/eb63/eb63.h"

extern int timer_close ( void );

//*----------------------------------------------------------------------------
//* Function Name       : at91_IRQ0_handler
//* Object              : Irq Handler called by the IRQ0 interrupt with AT91
//*    					  compatibility
//* Input Parameters    : none
//* Output Parameters   : none
//* Functions called    : at91_pio_read, at91_pio_write
//*----------------------------------------------------------------------------
void at91_IRQ0_handler(void)
{
    //* read the ouput state
    if ( (at91_pio_read ( &PIOB_DESC) & LED1 ) == LED1 )
    {
        at91_pio_write ( &PIOB_DESC, LED1, PIO_CLEAR_OUT );
    }
    else
    {
         at91_pio_write ( &PIOB_DESC, LED1, PIO_SET_OUT );
    }
	timer_close();
}

//*----------------------------------------------------------------------------
//* Function Name       : FIQ_handler
//* Object              : Irq Handler called by the FIQ interrupt with AT91
//*    					  compatibility
//* Input Parameters    : none
//* Output Parameters   : none
//* Functions called    : at91_pio_read, at91_pio_write
//*----------------------------------------------------------------------------
void FIQ_handler(void)
{

    //* read the ouput state
    if ( (at91_pio_read ( &PIOB_DESC) & LED2 ) == LED2 )
    {
        at91_pio_write ( &PIOB_DESC, LED2, PIO_CLEAR_OUT );
    }
    else
    {
         at91_pio_write ( &PIOB_DESC, LED2, PIO_SET_OUT );
    }
}