00001 /* ---------------------------------------------------------------------------- */ 00002 /* Atmel Microcontroller Software Support */ 00003 /* SAM Software Package License */ 00004 /* ---------------------------------------------------------------------------- */ 00005 /* Copyright (c) 2015, Atmel Corporation */ 00006 /* */ 00007 /* All rights reserved. */ 00008 /* */ 00009 /* Redistribution and use in source and binary forms, with or without */ 00010 /* modification, are permitted provided that the following condition is met: */ 00011 /* */ 00012 /* - Redistributions of source code must retain the above copyright notice, */ 00013 /* this list of conditions and the disclaimer below. */ 00014 /* */ 00015 /* Atmel's name may not be used to endorse or promote products derived from */ 00016 /* this software without specific prior written permission. */ 00017 /* */ 00018 /* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR */ 00019 /* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ 00020 /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE */ 00021 /* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, */ 00022 /* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */ 00023 /* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */ 00024 /* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */ 00025 /* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */ 00026 /* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */ 00027 /* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ 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 int 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 /**@}*/