/*------------------------------------------------------------------------*/ | |
/* Sample code of OS dependent synchronization object controls */ | |
/* for FatFs R0.07d (C)ChaN, 2009 */ | |
/*------------------------------------------------------------------------*/ | |
#include <FreeRTOS.h> | |
#include <semphr.h> | |
#include "../ff.h" | |
#if _FS_REENTRANT | |
/*------------------------------------------------------------------------*/ | |
/* Create a Synchronization Object for a Volume */ | |
/*------------------------------------------------------------------------*/ | |
/* This function is called in f_mount function to create a new | |
/ synchronization object, such as semaphore and mutex. When a FALSE is | |
/ returned, the f_mount function fails with FR_INT_ERR. | |
*/ | |
BOOL ff_cre_syncobj ( /* TRUE:Function succeeded, FALSE:Could not create due to any error */ | |
BYTE vol, /* Corresponding logical drive being processed */ | |
_SYNC_t *sobj /* Pointer to return the created sync object */ | |
) | |
{ | |
BOOL ret; | |
*sobj = xSemaphoreCreateMutex(); | |
if( *sobj == NULL ) | |
{ | |
ret = FALSE; | |
} | |
else | |
{ | |
ret = TRUE; | |
} | |
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 FALSE is | |
/ returned, the f_mount function fails with FR_INT_ERR. | |
*/ | |
BOOL ff_del_syncobj ( /* TRUE:Function succeeded, FALSE:Could not delete due to any error */ | |
_SYNC_t sobj /* Sync object tied to the logical drive to be deleted */ | |
) | |
{ | |
BOOL ret; | |
if( sobj != NULL ) | |
{ | |
vQueueDelete( sobj ); | |
ret = TRUE; | |
} | |
else | |
{ | |
ret = FALSE; | |
} | |
return ret; | |
} | |
/*------------------------------------------------------------------------*/ | |
/* Request Grant to Access the Volume */ | |
/*------------------------------------------------------------------------*/ | |
/* This function is called on entering file functions to lock the volume. | |
/ When a FALSE is returned, the file function fails with FR_TIMEOUT. | |
*/ | |
BOOL ff_req_grant ( /* TRUE:Got a grant to access the volume, FALSE:Could not get a grant */ | |
_SYNC_t sobj /* Sync object to wait */ | |
) | |
{ | |
BOOL ret; | |
ret = xSemaphoreTake( sobj, _FS_TIMEOUT ); | |
return ret; | |
} | |
/*------------------------------------------------------------------------*/ | |
/* Release Grant to Access the Volume */ | |
/*------------------------------------------------------------------------*/ | |
/* This function is called on leaving file functions to unlock the volume. | |
*/ | |
void ff_rel_grant ( | |
_SYNC_t sobj /* Sync object to be signaled */ | |
) | |
{ | |
xSemaphoreGive( sobj ); | |
} | |
#else | |
#error This file is not needed in this configuration. | |
#endif |