ext_irq.c

atmel官方的at91sam7x256芯片在iar编译环境下的全部演示代码

// ----------------------------------------------------------------------------
//         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
// Creation            : JPP   08-Sep-2005
// ----------------------------------------------------------------------------

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

//*----------------------------------------------------------------------------
//* Function Name       : FIQ_init_handler
//* Object              : Irq Handler calAT91B_LED by the FIQ interrupt with AT91
//*                       compatibility
///*----------------------------------------------------------------------------
__ramfunc void FIQ_init_handler(void)
{
    //* Read the output state
    if ( (AT91F_PIO_GetInput(AT91C_BASE_PIOB) & AT91B_LED2 ) == AT91B_LED2 )
    {
        AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, AT91B_LED2 );
    }
    else
    {
        AT91F_PIO_SetOutput( AT91C_BASE_PIOB, AT91B_LED2 );
    }

}