Diff: ff_gen_drv.c

Revision:

0:3a2f06aeceaf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ff_gen_drv.c	Sat Feb 03 14:38:06 2018 +0000
@@ -0,0 +1,151 @@
+/**
+  ******************************************************************************
+  * @file    ff_gen_drv.c 
+  * @author  MCD Application Team
+  * @version V1.4.0
+  * @date    23-December-2016
+  * @brief   FatFs generic low level driver.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2016 STMicroelectronics</center></h2>
+  *
+  * 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.
+  *
+  ******************************************************************************
+  */ 
+
+/* 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 paramter must be equal to 0
+  * @retval Returns 0 in case of success, otherwise 1.
+  */
+uint8_t FATFS_LinkDriverEx(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(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****/
+