| 1 | /**
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| 2 | ******************************************************************************
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| 3 | * @file ff_gen_drv.c
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| 4 | * @author MCD Application Team
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| 5 | * @brief FatFs generic low level driver.
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| 6 | *****************************************************************************
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| 7 | * @attention
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| 8 | *
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| 9 | * Copyright (c) 2017 STMicroelectronics. All rights reserved.
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| 10 | *
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| 11 | * This software component is licensed by ST under BSD 3-Clause license,
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| 12 | * the "License"; You may not use this file except in compliance with the
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| 13 | * License. You may obtain a copy of the License at:
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| 14 | * opensource.org/licenses/BSD-3-Clause
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| 15 | *
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| 16 | ******************************************************************************
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| 17 | **/
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| 18 | /* Includes ------------------------------------------------------------------*/
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| 19 | #include "ff_gen_drv.h"
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| 20 |
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| 21 | /* Private typedef -----------------------------------------------------------*/
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| 22 | /* Private define ------------------------------------------------------------*/
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| 23 | /* Private variables ---------------------------------------------------------*/
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| 24 | Disk_drvTypeDef disk = {{0},{0},{0},0};
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| 25 |
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| 26 | /* Private function prototypes -----------------------------------------------*/
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| 27 | /* Private functions ---------------------------------------------------------*/
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| 28 |
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| 29 | /**
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| 30 | * @brief Links a compatible diskio driver/lun id and increments the number of active
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| 31 | * linked drivers.
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| 32 | * @note The number of linked drivers (volumes) is up to 10 due to FatFs limits.
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| 33 | * @param drv: pointer to the disk IO Driver structure
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| 34 | * @param path: pointer to the logical drive path
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| 35 | * @param lun : only used for USB Key Disk to add multi-lun management
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| 36 | else the parameter must be equal to 0
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| 37 | * @retval Returns 0 in case of success, otherwise 1.
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| 38 | */
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| 39 | uint8_t FATFS_LinkDriverEx(const Diskio_drvTypeDef *drv, char *path, uint8_t lun)
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| 40 | {
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| 41 | uint8_t ret = 1;
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| 42 | uint8_t DiskNum = 0;
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| 43 |
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| 44 | if(disk.nbr < _VOLUMES)
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| 45 | {
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| 46 | disk.is_initialized[disk.nbr] = 0;
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| 47 | disk.drv[disk.nbr] = drv;
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| 48 | disk.lun[disk.nbr] = lun;
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| 49 | DiskNum = disk.nbr++;
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| 50 | path[0] = DiskNum + '0';
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| 51 | path[1] = ':';
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| 52 | path[2] = '/';
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| 53 | path[3] = 0;
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| 54 | ret = 0;
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| 55 | }
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| 56 |
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| 57 | return ret;
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| 58 | }
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| 59 |
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| 60 | /**
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| 61 | * @brief Links a compatible diskio driver and increments the number of active
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| 62 | * linked drivers.
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| 63 | * @note The number of linked drivers (volumes) is up to 10 due to FatFs limits
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| 64 | * @param drv: pointer to the disk IO Driver structure
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| 65 | * @param path: pointer to the logical drive path
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| 66 | * @retval Returns 0 in case of success, otherwise 1.
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| 67 | */
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| 68 | uint8_t FATFS_LinkDriver(const Diskio_drvTypeDef *drv, char *path)
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| 69 | {
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| 70 | return FATFS_LinkDriverEx(drv, path, 0);
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| 71 | }
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| 72 |
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| 73 | /**
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| 74 | * @brief Unlinks a diskio driver and decrements the number of active linked
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| 75 | * drivers.
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| 76 | * @param path: pointer to the logical drive path
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| 77 | * @param lun : not used
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| 78 | * @retval Returns 0 in case of success, otherwise 1.
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| 79 | */
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| 80 | uint8_t FATFS_UnLinkDriverEx(char *path, uint8_t lun)
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| 81 | {
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| 82 | uint8_t DiskNum = 0;
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| 83 | uint8_t ret = 1;
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| 84 |
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| 85 | if(disk.nbr >= 1)
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| 86 | {
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| 87 | DiskNum = path[0] - '0';
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| 88 | if(disk.drv[DiskNum] != 0)
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| 89 | {
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| 90 | disk.drv[DiskNum] = 0;
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| 91 | disk.lun[DiskNum] = 0;
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| 92 | disk.nbr--;
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| 93 | ret = 0;
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| 94 | }
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| 95 | }
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| 96 |
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| 97 | return ret;
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| 98 | }
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| 99 |
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| 100 | /**
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| 101 | * @brief Unlinks a diskio driver and decrements the number of active linked
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| 102 | * drivers.
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| 103 | * @param path: pointer to the logical drive path
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| 104 | * @retval Returns 0 in case of success, otherwise 1.
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| 105 | */
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| 106 | uint8_t FATFS_UnLinkDriver(char *path)
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| 107 | {
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| 108 | return FATFS_UnLinkDriverEx(path, 0);
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| 109 | }
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| 110 |
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| 111 | /**
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| 112 | * @brief Gets number of linked drivers to the FatFs module.
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| 113 | * @param None
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| 114 | * @retval Number of attached drivers.
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| 115 | */
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| 116 | uint8_t FATFS_GetAttachedDriversNbr(void)
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| 117 | {
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| 118 | return disk.nbr;
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| 119 | }
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| 120 |
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| 121 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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| 122 |
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