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+/**

+  ******************************************************************************

+  * @file    ff_gen_drv.c 

+  * @author  MCD Application Team

+  * @version V1.4.1

+  * @date    14-February-2017

+  * @brief   FatFs generic low level driver.

+  ******************************************************************************

+  * @attention

+  *

+  * <h2><center>&copy; COPYRIGHT 2017 STMicroelectronics</center></h2>

+  *

+  * Redistribution and use in source and binary forms, with or without 

+  * modification, are permitted, provided that the following conditions are met:

+  *

+  * 1. Redistribution of source code must retain the above copyright notice, 

+  *    this list of conditions and the following disclaimer.

+  * 2. Redistributions in binary form must reproduce the above copyright notice,

+  *    this list of conditions and the following disclaimer in the documentation

+  *    and/or other materials provided with the distribution.

+  * 3. Neither the name of STMicroelectronics nor the names of other 

+  *    contributors to this software may be used to endorse or promote products 

+  *    derived from this software without specific written permission.

+  * 4. This software, including modifications and/or derivative works of this 

+  *    software, must execute solely and exclusively on microcontroller or

+  *    microprocessor devices manufactured by or for STMicroelectronics.

+  * 5. Redistribution and use of this software other than as permitted under 

+  *    this license is void and will automatically terminate your rights under 

+  *    this license. 

+  *

+  * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 

+  * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 

+  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 

+  * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY

+  * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 

+  * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

+  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 

+  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 

+  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 

+  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,

+  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+  *

+  ******************************************************************************

+  */ 

+

+/* Includes ------------------------------------------------------------------*/

+#include "ff_gen_drv.h"

+

+/* Private typedef -----------------------------------------------------------*/

+/* Private define ------------------------------------------------------------*/

+/* Private variables ---------------------------------------------------------*/

+Disk_drvTypeDef disk = {{0},{0},{0},0};

+

+/* Private function prototypes -----------------------------------------------*/

+/* Private functions ---------------------------------------------------------*/

+

+/**

+  * @brief  Links a compatible diskio driver/lun id and increments the number of active

+  *         linked drivers.

+  * @note   The number of linked drivers (volumes) is up to 10 due to FatFs limits.

+  * @param  drv: pointer to the disk IO Driver structure

+  * @param  path: pointer to the logical drive path 

+  * @param  lun : only used for USB Key Disk to add multi-lun management

+            else the paramter must be equal to 0

+  * @retval Returns 0 in case of success, otherwise 1.

+  */

+uint8_t FATFS_LinkDriverEx(Diskio_drvTypeDef *drv, char *path, uint8_t lun)

+{

+  uint8_t ret = 1;

+  uint8_t DiskNum = 0;

+  

+  if(disk.nbr <= _VOLUMES)

+  {

+    disk.is_initialized[disk.nbr] = 0;

+    disk.drv[disk.nbr] = drv;  

+    disk.lun[disk.nbr] = lun;  

+    DiskNum = disk.nbr++;

+    path[0] = DiskNum + '0';

+    path[1] = ':';

+    path[2] = '/';

+    path[3] = 0;

+    ret = 0;

+  }

+  

+  return ret;

+}

+

+/**

+  * @brief  Links a compatible diskio driver and increments the number of active

+  *         linked drivers.          

+  * @note   The number of linked drivers (volumes) is up to 10 due to FatFs limits

+  * @param  drv: pointer to the disk IO Driver structure

+  * @param  path: pointer to the logical drive path 

+  * @retval Returns 0 in case of success, otherwise 1.

+  */

+uint8_t FATFS_LinkDriver(Diskio_drvTypeDef *drv, char *path)

+{

+  return FATFS_LinkDriverEx(drv, path, 0);

+}

+

+/**

+  * @brief  Unlinks a diskio driver and decrements the number of active linked

+  *         drivers.

+  * @param  path: pointer to the logical drive path  

+  * @param  lun : not used   

+  * @retval Returns 0 in case of success, otherwise 1.

+  */

+uint8_t FATFS_UnLinkDriverEx(char *path, uint8_t lun)

+{ 

+  uint8_t DiskNum = 0;

+  uint8_t ret = 1;

+  

+  if(disk.nbr >= 1)

+  {    

+    DiskNum = path[0] - '0';

+    if(disk.drv[DiskNum] != 0)

+    {

+      disk.drv[DiskNum] = 0;

+      disk.lun[DiskNum] = 0;

+      disk.nbr--;

+      ret = 0;

+    }

+  }

+  

+  return ret;

+}

+

+/**

+  * @brief  Unlinks a diskio driver and decrements the number of active linked

+  *         drivers.

+  * @param  path: pointer to the logical drive path  

+  * @retval Returns 0 in case of success, otherwise 1.

+  */

+uint8_t FATFS_UnLinkDriver(char *path)

+{ 

+  return FATFS_UnLinkDriverEx(path, 0);

+}

+

+/**

+  * @brief  Gets number of linked drivers to the FatFs module.

+  * @param  None

+  * @retval Number of attached drivers.

+  */

+uint8_t FATFS_GetAttachedDriversNbr(void)

+{

+  return disk.nbr;

+}

+ 

+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

+