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/* ----------------------------------------------------------------------------

 *         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>

//------------------------------------------------------------------------------

//         Global functions

//------------------------------------------------------------------------------

//------------------------------------------------------------------------------

/// Configures an interrupt in the AIC. The interrupt is identified by its

/// source (AT91C_ID_xxx) and is configured to use the specified mode and

/// interrupt handler function. Mode is the value that will be put in AIC_SMRx

/// and the function address will be set in AIC_SVRx.

/// The interrupt is disabled before configuration, so it is useless

/// to do it before calling this function. When AIC_ConfigureIT returns, the

/// interrupt will always be disabled and cleared; it must be enabled by a

/// call to AIC_EnableIT().

/// \param source  Interrupt source to configure.

/// \param mode  Triggering mode and priority 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 (AT91C_ID_xxx).

/// \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 (AT91C_ID_xxx).

/// \param source  Interrupt source to enable.

//------------------------------------------------------------------------------

void AIC_DisableIT(unsigned int source)

{

    AT91C_BASE_AIC->AIC_IDCR = 1 << source;

}