ff_gen_drv.c File Reference

FatFs generic low level driver. More...

#include "ff_gen_drv.h"

Functions
uint8_t	FATFS_LinkDriverEx (const Diskio_drvTypeDef *drv, char *path, uint8_t lun)
	Links a compatible diskio driver/lun id and increments the number of active linked drivers. More...
uint8_t	FATFS_LinkDriver (const Diskio_drvTypeDef *drv, char *path)
	Links a compatible diskio driver and increments the number of active linked drivers. More...
uint8_t	FATFS_UnLinkDriverEx (char *path, uint8_t lun)
	Unlinks a diskio driver and decrements the number of active linked drivers. More...
uint8_t	FATFS_UnLinkDriver (char *path)
	Unlinks a diskio driver and decrements the number of active linked drivers. More...
uint8_t	FATFS_GetAttachedDriversNbr (void)
	Gets number of linked drivers to the FatFs module. More...

Variables
Disk_drvTypeDef	disk = {{0},{0},{0},0}

Detailed Description

FatFs generic low level driver.

Author

MCD Application Team

Version

V2.0.2

Date

10-November-2017

Attention

© Copyright (c) 2017 STMicroelectronics International N.V. All rights reserved.

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.

Function Documentation

FATFS_LinkDriverEx()

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

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.

Parameters

drv	pointer to the disk IO Driver structure
path	pointer to the logical drive path
lun	: only used for USB Key Disk to add multi-lun management else the parameter must be equal to 0

Return values

Returns

0 in case of success, otherwise 1.

{
  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;
}

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FATFS_LinkDriver()

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

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

Parameters

drv	pointer to the disk IO Driver structure
path	pointer to the logical drive path

Return values

Returns

0 in case of success, otherwise 1.

{
  return FATFS_LinkDriverEx(drv, path, 0);
}

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FATFS_UnLinkDriverEx()

uint8_t FATFS_UnLinkDriverEx	(	char *	path,
		uint8_t	lun
	)

Unlinks a diskio driver and decrements the number of active linked drivers.

Parameters

path	pointer to the logical drive path
lun	: not used

Return values

Returns

0 in case of success, otherwise 1.

{
  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;
}

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FATFS_UnLinkDriver()

uint8_t FATFS_UnLinkDriver

(

char *

path

)

Unlinks a diskio driver and decrements the number of active linked drivers.

Parameters

path	pointer to the logical drive path

Return values

Returns

0 in case of success, otherwise 1.

{
  return FATFS_UnLinkDriverEx(path, 0);
}

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FATFS_GetAttachedDriversNbr()

uint8_t FATFS_GetAttachedDriversNbr

(

void

)

Gets number of linked drivers to the FatFs module.

Parameters

None

Return values

Number

of attached drivers.

{
  return disk.nbr;
}

Variable Documentation

disk

Disk_drvTypeDef disk = {{0},{0},{0},0}

© Copyright (c) 2017 STMicroelectronics International N.V. All rights reserved.

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.