FreeRTOS/Demo/Common/drivers/Atmel/at91lib/peripherals/aic/aic.c

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2008, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * 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.
 * ----------------------------------------------------------------------------
 */

//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------

#include "aic.h"
#include <board.h>

//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// Configures the interrupt associated with the given source, using the
/// specified mode and interrupt handler.
/// \param source  Interrupt source to configure.
/// \param mode  Triggering mode of the interrupt.
/// \param handler  Interrupt handler function.
//------------------------------------------------------------------------------
void AIC_ConfigureIT(unsigned int source,
                            unsigned int mode,
                            void (*handler)( void ))
{
    // Disable the interrupt first
    AT91C_BASE_AIC->AIC_IDCR = 1 << source;

    // Configure mode and handler
    AT91C_BASE_AIC->AIC_SMR[source] = mode;
    AT91C_BASE_AIC->AIC_SVR[source] = (unsigned int) handler;

    // Clear interrupt
    AT91C_BASE_AIC->AIC_ICCR = 1 << source;
}

//------------------------------------------------------------------------------
/// Enables interrupts coming from the given (unique) source.
/// \param source  Interrupt source to enable.
//------------------------------------------------------------------------------
void AIC_EnableIT(unsigned int source)
{
    AT91C_BASE_AIC->AIC_IECR = 1 << source;
}

//------------------------------------------------------------------------------
/// Disables interrupts coming from the given (unique) source.
/// \param source  Interrupt source to enable.
//------------------------------------------------------------------------------
void AIC_DisableIT(unsigned int source)
{
    AT91C_BASE_AIC->AIC_IDCR = 1 << source;
}