/* ----------------------------------------------------------------------------
 *         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.
 * ----------------------------------------------------------------------------
 */

/** \file
 * \addtogroup usbd_msd
 *@{
 */

/*------------------------------------------------------------------------------
 *         Headers
 *------------------------------------------------------------------------------*/

#include "MSDIOFifo.h"

/*------------------------------------------------------------------------------
 *         Internal variables
 *------------------------------------------------------------------------------*/


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

/**
 * \brief  Initializes a MSDIOFifo instance.
 * \param  pFifo        Pointer to the MSDIOFifo instance to initialize
 * \param  pBuffer      Pointer to a buffer used for read/write operation and
 *                      which must be blockSize bytes aligned.
 * \param  bufferSize   Total size of the buffer in bytes
 */
void MSDIOFifo_Init(MSDIOFifo *pFifo,
                    void * pBuffer, unsigned short bufferSize)
{
    pFifo->pBuffer = pBuffer;
    pFifo->bufferSize = bufferSize;

    pFifo->inputNdx = 0;
    pFifo->outputNdx = 0;
    pFifo->inputTotal = 0;
    pFifo->outputTotal = 0;

    pFifo->inputState = MSDIO_IDLE;
    pFifo->outputState = MSDIO_IDLE;

    pFifo->fullCnt = 0;
    pFifo->nullCnt = 0;
}

/**@}*/