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- /**
- ******************************************************************************
- * @file ff_gen_drv.c
- * @author MCD Application Team
- * @brief FatFs generic low level driver.
- *****************************************************************************
- * @attention
- *
- * Copyright (c) 2017 STMicroelectronics. All rights reserved.
- *
- * This software component is licensed by ST under BSD 3-Clause license,
- * the "License"; You may not use this file except in compliance with the
- * License. You may obtain a copy of the License at:
- * opensource.org/licenses/BSD-3-Clause
- *
- ******************************************************************************
- **/
- /* 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 parameter must be equal to 0
- * @retval Returns 0 in case of success, otherwise 1.
- */
- uint8_t FATFS_LinkDriverEx(const 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(const 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****/
-
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