ext_irq.c

Atmel AT91SAM7S Interrupt example code

// ----------------------------------------------------------------------------
//         ATMEL Microcontroller Software Support  -  ROUSSET  -
// ----------------------------------------------------------------------------
// DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
// DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
// OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ----------------------------------------------------------------------------
//  File Name           : ext_irq.c
//  Object              : External interrupt handler for irq
//                      : Use LED5 & LED6 for status interrupt
//  1.0 24/Jun/04 JPP   : Creation
//  1.2 29/Aug/05 JPP   : Update AIC definion
// ----------------------------------------------------------------------------

// Include Standard LIB  files
#include "Project.h"

int status_irq = 0 ;

//*----------------------------------------------------------------------------
//* Function Name       : at91_IRQ0_handler
//* Object              : Irq Handler called by the IRQ0 interrupt with AT91
//*                       compatibility
//*----------------------------------------------------------------------------
void at91_IRQ0_handler(void)
{
    if (status_irq == 0) status_irq = 1;
    else status_irq = 0 ;
    //* Read the output state
    if ( (AT91F_PIO_GetInput(AT91D_BASE_PIO_LED) & AT91B_LED2 ) == AT91B_LED2 )
    {
        AT91F_PIO_ClearOutput( AT91D_BASE_PIO_LED, AT91B_LED2 );
    }
    else
    {
        AT91F_PIO_SetOutput( AT91D_BASE_PIO_LED, AT91B_LED2 );
    }
    //* while SW3 is push loop
    while ( (AT91F_PIO_GetInput(AT91D_BASE_PIO_SW) & AT91B_SW3 ) != AT91B_SW3 );
}

//*----------------------------------------------------------------------------
//* Function Name       : FIQ_init_handler
//* Object              : Irq Handler called by the FIQ interrupt with AT91
//*                       compatibility
///*----------------------------------------------------------------------------
void FIQ_init_handler(void)
{
    //* Read the output state
    if ( (AT91F_PIO_GetInput(AT91D_BASE_PIO_LED) & AT91B_LED3 ) == AT91B_LED3 )
    {
        AT91F_PIO_ClearOutput( AT91D_BASE_PIO_LED, AT91B_LED3 );
    }
    else
    {
        AT91F_PIO_SetOutput( AT91D_BASE_PIO_LED, AT91B_LED3 );
    }

}