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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****/