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/**
******************************************************************************
* @file ff_gen_drv.c
* @author MCD Application Team
* @version V1.0.0
* @date 18-February-2014
* @brief FatFs generic low level driver.
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "ff_gen_drv.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
Disk_drvTypeDef disk = {0};
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @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)
{
uint8_t ret = 1;
uint8_t DiskNum = 0;
if(disk.nbr <= _VOLUMES)
{
disk.drv[disk.nbr] = drv;
DiskNum = disk.nbr++;
path[0] = DiskNum + '0';
path[1] = ':';
path[2] = '/';
path[3] = 0;
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)
{
uint8_t DiskNum = 0;
uint8_t ret = 1;
if(disk.nbr >= 1)
{
DiskNum = path[0] - '0';
if(DiskNum <= disk.nbr)
{
disk.drv[disk.nbr--] = 0;
ret = 0;
}
}
return ret;
}
/**
* @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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