257 lines
8.4 KiB
C
257 lines
8.4 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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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include <string.h>
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#include "Media.h"
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#include "debug.h"
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#include "board.h"
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#include "../FatFs/diskio.h"
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//------------------------------------------------------------------------------
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// Constants
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//------------------------------------------------------------------------------
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/// Number of SD Slots
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#define NUM_SD_SLOTS 1
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#define SD_BLOCK_SIZE 512
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//------------------------------------------------------------------------------
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/// Checks if the device is write protected.
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/// \return 1 if protected.
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//------------------------------------------------------------------------------
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#if 0
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static unsigned char CardIsProtected(unsigned char slot)
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{
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if (slot == 0) {
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#ifdef BOARD_SD_PIN_WP
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PIO_Configure(&pinMciWriteProtect, 1);
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return (PIO_Get(&pinMciWriteProtect) != 0);
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#else
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return 0;
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#endif
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}
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if (slot == 1) {
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#ifdef BOARD_SD_MCI1_PIN_WP
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PIO_Configure(&pinMciWriteProtect1, 1);
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return (PIO_Get(&pinMciWriteProtect1) != 0);
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#else
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return 0;
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#endif
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}
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return 0;
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}
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#endif
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//------------------------------------------------------------------------------
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/// Configure the PIO for SD
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//------------------------------------------------------------------------------
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#if 0
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static void ConfigurePIO(unsigned char mciID)
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{
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#ifdef BOARD_SD_PINS
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const Pin pinSd0[] = {BOARD_SD_PINS};
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#endif
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#ifdef BOARD_SD_MCI1_PINS
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const Pin pinSd1[] = {BOARD_SD_MCI1_PINS};
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#endif
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if(mciID == 0) {
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#ifdef BOARD_SD_PINS
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PIO_Configure(pinSd0, PIO_LISTSIZE(pinSd0));
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#endif
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} else {
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#ifdef BOARD_SD_MCI1_PINS
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PIO_Configure(pinSd1, PIO_LISTSIZE(pinSd1));
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#endif
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}
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}
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#endif
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//------------------------------------------------------------------------------
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//! \brief Reads a specified amount of data from a SDCARD memory
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//! \param media Pointer to a Media instance
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//! \param address Address of the data to read
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//! \param data Pointer to the buffer in which to store the retrieved
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//! data
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//! \param length Length of the buffer
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//! \param callback Optional pointer to a callback function to invoke when
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//! the operation is finished
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//! \param argument Optional pointer to an argument for the callback
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//! \return Operation result code
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//------------------------------------------------------------------------------
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static unsigned char MEDSdcard_Read(Media *media,
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unsigned int address,
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void *data,
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unsigned int length,
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MediaCallback callback,
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void *argument)
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{
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TRACE_DEBUG("MEDSdcard_Read(address=%d length=%d)\n\r", address, length);
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// Check that the media is ready
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if (media->state != MED_STATE_READY) {
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TRACE_INFO("Media busy\n\r");
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return MED_STATUS_BUSY;
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}
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// Check that the data to read is not too big
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if ((length + address) > media->size) {
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TRACE_WARNING("MEDSdcard_Read: Data too big: %d, %d\n\r",
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(int)length, (int)address);
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return MED_STATUS_ERROR;
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}
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// Enter Busy state
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media->state = MED_STATE_BUSY;
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disk_read (0, data, address, length);
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// Leave the Busy state
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media->state = MED_STATE_READY;
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// Invoke callback
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if (callback != 0) {
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callback(argument, MED_STATUS_SUCCESS, 0, 0);
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}
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return MED_STATUS_SUCCESS;
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}
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//------------------------------------------------------------------------------
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//! \brief Writes data on a SDRAM media
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//! \param media Pointer to a Media instance
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//! \param address Address at which to write
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//! \param data Pointer to the data to write
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//! \param length Size of the data buffer
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//! \param callback Optional pointer to a callback function to invoke when
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//! the write operation terminates
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//! \param argument Optional argument for the callback function
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//! \return Operation result code
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//! \see Media
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//! \see MediaCallback
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//------------------------------------------------------------------------------
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static unsigned char MEDSdcard_Write(Media *media,
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unsigned int address,
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void *data,
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unsigned int length,
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MediaCallback callback,
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void *argument)
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{
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TRACE_DEBUG("MEDSdcard_Write(address=%d length=%d)\n\r", address, length);
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// Check that the media if ready
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if (media->state != MED_STATE_READY) {
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TRACE_WARNING("MEDSdcard_Write: Media is busy\n\r");
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return MED_STATUS_BUSY;
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}
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// Check that the data to write is not too big
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if ((length + address) > media->size) {
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TRACE_WARNING("MEDSdcard_Write: Data too big\n\r");
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return MED_STATUS_ERROR;
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}
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// Put the media in Busy state
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media->state = MED_STATE_BUSY;
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disk_write(0, data, address, length);
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// Leave the Busy state
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media->state = MED_STATE_READY;
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// Invoke the callback if it exists
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if (callback != 0) {
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callback(argument, MED_STATUS_SUCCESS, 0, 0);
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}
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return MED_STATUS_SUCCESS;
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}
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//------------------------------------------------------------------------------
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/// Initializes a Media instance and the associated physical interface
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/// \param media Pointer to the Media instance to initialize
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/// \return 1 if success.
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//------------------------------------------------------------------------------
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unsigned char MEDSdcard_Initialize(Media *media, unsigned char mciID)
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{
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TRACE_INFO("MEDSdcard init\n\r");
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// Initialize SDcard
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//--------------------------------------------------------------------------
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if ( !CardIsConnected( ) )
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{
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return 0;
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}
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media->write = MEDSdcard_Write;
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media->read = MEDSdcard_Read;
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media->lock = 0;
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media->unlock = 0;
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media->handler = 0;
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media->flush = 0;
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media->blockSize = SD_BLOCK_SIZE;
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media->baseAddress = 0;
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media->size = SD_GET_BLOCKNR();
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media->mappedRD = 0;
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media->mappedWR = 0;
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media->protected = 0;
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media->removable = 1;
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media->state = MED_STATE_READY;
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media->transfer.data = 0;
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media->transfer.address = 0;
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media->transfer.length = 0;
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media->transfer.callback = 0;
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media->transfer.argument = 0;
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return 1;
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}
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