SAMV71 Xplained Ultra Software Package 1.5

MSDIOFifo.c

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00002 /*                  Atmel Microcontroller Software Support                      */
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00005 /* Copyright (c) 2015, Atmel Corporation                                        */
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00011 /*                                                                              */
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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 /**@}*/
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