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76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/** \file
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* \addtogroup usbd_msd
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*@{
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*/
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/*------------------------------------------------------------------------------
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* Headers
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*------------------------------------------------------------------------------*/
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#include "MSDIOFifo.h"
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/*------------------------------------------------------------------------------
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* Internal variables
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*------------------------------------------------------------------------------*/
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/*------------------------------------------------------------------------------
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* Exported functions
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*------------------------------------------------------------------------------*/
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/**
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* \brief Initializes a MSDIOFifo instance.
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* \param pFifo Pointer to the MSDIOFifo instance to initialize
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* \param pBuffer Pointer to a buffer used for read/write operation and
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* which must be blockSize bytes aligned.
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* \param bufferSize Total size of the buffer in bytes
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*/
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void MSDIOFifo_Init(MSDIOFifo *pFifo,
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void * pBuffer, unsigned short bufferSize)
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{
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pFifo->pBuffer = pBuffer;
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pFifo->bufferSize = bufferSize;
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pFifo->inputNdx = 0;
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pFifo->outputNdx = 0;
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pFifo->inputTotal = 0;
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pFifo->outputTotal = 0;
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pFifo->inputState = MSDIO_IDLE;
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pFifo->outputState = MSDIO_IDLE;
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pFifo->fullCnt = 0;
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pFifo->nullCnt = 0;
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}
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/**@}*/
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