ext_irq.c

来自「ATMEL AT91RM9200开发板配套光盘上的全部示例程序」· C语言 代码 · 共 65 行

//*----------------------------------------------------------------------------
//*      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 
//*                     : Use LED5 & LED6 for status interrupt
//* 1.0 18/11/02 JPP    : Creation
//*----------------------------------------------------------------------------


// Include Standart LIB  files 
#include "include/AT91M55800A.h"
#include "include/lib_AT91M55800A.h"
#include "eb55.h"


int status_irq = 0 ;

//*----------------------------------------------------------------------------
//* Function Name       : at91_IRQ0_handler
//* Object              : Irq Handler called by the IRQ0 interrupt with AT91
//*                       compatibility
//* Input Parameters    : none
//* Output Parameters   : none
//*----------------------------------------------------------------------------
void at91_IRQ0_handler(void)
{

    if (status_irq == 0) status_irq = 1;
    else status_irq = 0 ;
    //* read the ouput state
    //* read the ouput state
    if ( (AT91F_PIO_GetInput(AT91C_BASE_PIOB) & LED6 ) == LED6 )
    {
        AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, LED6 );
    }
    else
    {
        AT91F_PIO_SetOutput( AT91C_BASE_PIOB, LED6 );
    }
    //* while SW1 is push loop
    while ( (AT91F_PIO_GetInput(AT91C_BASE_PIOB) & SW1_MASK ) != SW1_MASK );

}

//*----------------------------------------------------------------------------
//* Function Name       : FIQ_init_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_init_handler(void)
{
        AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, LED4 );
}