text: #include "ff.h"			/* Declarations of FatFs API */
  
  #include "FreeRTOS.h"	// O/S definitions */
  #include "semphr.h"	// O/S definitions */
  
  #if FF_DEFINED != 86604	/* Revision ID */
  #error Wrong include file (ff.h).
  #endif
  
  #if FF_FS_REENTRANT
  /*------------------------------------------------------------------------*/
  /* Create a Synchronization Object										  */
  /*------------------------------------------------------------------------*/
  /* This function is called in f_mount() function to create a new
  /  synchronization object, such as semaphore and mutex. When a 0 is returned,
  /  the f_mount() function fails with FR_INT_ERR.
  */
  
  int ff_cre_syncobj (	/* !=0:Function succeeded, ==0:Could not create due to any error */
  	BYTE vol,			/* Corresponding logical drive being processed */
  	FF_SYNC_t *sobj		/* Pointer to return the created sync object */
  )
  {
      configASSERT(vol == 0);
  	int ret;
  
  	*sobj = xSemaphoreCreateMutex();	/* FreeRTOS */
  	ret = (int)(*sobj != NULL);
  
  	return ret;
  }
  
  
  
  /*------------------------------------------------------------------------*/
  /* Delete a Synchronization Object                                        */
  /*------------------------------------------------------------------------*/
  /* This function is called in f_mount() function to delete a synchronization
  /  object that created with ff_cre_syncobj function. When a 0 is returned,
  /  the f_mount() function fails with FR_INT_ERR.
  */
  
  int ff_del_syncobj (	/* !=0:Function succeeded, ==0:Could not delete due to any error */
  	FF_SYNC_t sobj		/* Sync object tied to the logical drive to be deleted */
  )
  {
  	int ret;
  
      vSemaphoreDelete(sobj);		/* FreeRTOS */
  	ret = 1;
  
  	return ret;
  }
  
  
  
  /*------------------------------------------------------------------------*/
  /* Request Grant to Access the Volume                                     */
  /*------------------------------------------------------------------------*/
  /* This function is called on entering file functions to lock the volume.
  /  When a 0 is returned, the file function fails with FR_TIMEOUT.
  */
  
  int ff_req_grant (	/* 1:Got a grant to access the volume, 0:Could not get a grant */
  	FF_SYNC_t sobj	/* Sync object to wait */
  )
  {
  	int ret;
  
  	ret = (int)(xSemaphoreTake(sobj, pdMS_TO_TICKS(FF_FS_TIMEOUT)) == pdTRUE);	/* FreeRTOS */
  
  	return ret;
  }
  
  
  
  /*------------------------------------------------------------------------*/
  /* Release Grant to Access the Volume                                     */
  /*------------------------------------------------------------------------*/
  /* This function is called on leaving file functions to unlock the volume.
  */
  
  void ff_rel_grant (
  	FF_SYNC_t sobj	/* Sync object to be signaled */
  )
  {
  	xSemaphoreGive(sobj);	/* FreeRTOS */
  }
  
  #endif
  
  
  
  
  #if FF_USE_LFN == 3	/* LFN with a working buffer on the heap */
  /*------------------------------------------------------------------------*/
  /* Allocate a memory block                                                */
  /*------------------------------------------------------------------------*/
  /* If a NULL is returned, the file function fails with FR_NOT_ENOUGH_CORE.
  */
  void* ff_memalloc (	/* Returns pointer to the allocated memory block */
  	UINT msize		/* Number of bytes to allocate */
  )
  {
  	return pvPortMalloc(msize);	/* Allocate a new memory block with POSIX API */
  }
  
  
  /*------------------------------------------------------------------------*/
  /* Free a memory block                                                    */
  /*------------------------------------------------------------------------*/
  
  void ff_memfree (
  	void* mblock	/* Pointer to the memory block to free */
  )
  {
  	vPortFree(mblock);	/* Discard the memory block with POSIX API */
  }
  
  #endif
  
  
  
  /* RTC function */
  #if !FF_FS_READONLY && !FF_FS_NORTC
  DWORD get_fattime (void)
  {
  	return (DWORD)xTaskGetTickCount();
  }
  #endif