00001 /* ---------------------------------------------------------------------------- 00002 * ATMEL Microcontroller Software Support 00003 * ---------------------------------------------------------------------------- 00004 * Copyright (c) 2008, Atmel Corporation 00005 * 00006 * All rights reserved. 00007 * 00008 * Redistribution and use in source and binary forms, with or without 00009 * modification, are permitted provided that the following conditions are met: 00010 * 00011 * - Redistributions of source code must retain the above copyright notice, 00012 * this list of conditions and the disclaimer below. 00013 * 00014 * Atmel's name may not be used to endorse or promote products derived from 00015 * this software without specific prior written permission. 00016 * 00017 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR 00018 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00019 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE 00020 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, 00021 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00022 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 00023 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00024 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00025 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 00026 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 * ---------------------------------------------------------------------------- 00028 */ 00029 00030 /** \file 00031 * \addtogroup usbd_msd 00032 *@{ 00033 */ 00034 00035 /*------------------------------------------------------------------------------ 00036 * Headers 00037 *------------------------------------------------------------------------------*/ 00038 00039 #include "MSDIOFifo.h" 00040 00041 /*------------------------------------------------------------------------------ 00042 * Internal variables 00043 *------------------------------------------------------------------------------*/ 00044 00045 00046 /*------------------------------------------------------------------------------ 00047 * Exported functions 00048 *------------------------------------------------------------------------------*/ 00049 00050 /** 00051 * \brief Initializes a MSDIOFifo instance. 00052 * \param pFifo Pointer to the MSDIOFifo instance to initialize 00053 * \param pBuffer Pointer to a buffer used for read/write operation and 00054 * which must be blockSize bytes aligned. 00055 * \param bufferSize Total size of the buffer in bytes 00056 */ 00057 void MSDIOFifo_Init(MSDIOFifo *pFifo, 00058 void * pBuffer, unsigned short bufferSize) 00059 { 00060 pFifo->pBuffer = pBuffer; 00061 pFifo->bufferSize = bufferSize; 00062 00063 pFifo->inputNdx = 0; 00064 pFifo->outputNdx = 0; 00065 pFifo->inputTotal = 0; 00066 pFifo->outputTotal = 0; 00067 00068 pFifo->inputState = MSDIO_IDLE; 00069 pFifo->outputState = MSDIO_IDLE; 00070 00071 pFifo->fullCnt = 0; 00072 pFifo->nullCnt = 0; 00073 } 00074 00075 /**@}*/