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/*------------------------------------------------------------------------*/
/* Sample code of OS dependent controls for FatFs */
/* (C)ChaN, 2014 */
/*------------------------------------------------------------------------*/
#include <stdlib.h> /* ANSI memory controls */
#include "../ff.h"
#if _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 zero is
returned, the f_mount function fails with FR_INT_ERR.
*/
int 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 */
)
{
int ret;
osSemaphoreDef(SEM);
*sobj = osSemaphoreCreate(osSemaphore(SEM), 1);
ret = (*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 zero is
/ returned, the f_mount function fails with FR_INT_ERR.
*/
int 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 */
)
{
osSemaphoreDelete (sobj);
return 1;
}
/*------------------------------------------------------------------------*/
/* Request Grant to Access the Volume */
/*------------------------------------------------------------------------*/
/* This function is called on entering file functions to lock the volume.
/ When a zero is returned, the file function fails with FR_TIMEOUT.
*/
int ff_req_grant ( /* TRUE:Got a grant to access the volume, FALSE:Could not get a grant */
_SYNC_t sobj /* Sync object to wait */
)
{
int ret = 0;
if(osSemaphoreWait(sobj, _FS_TIMEOUT) == osOK)
{
ret = 1;
}
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 */
)
{
osSemaphoreRelease(sobj);
}
#endif
#if _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 malloc(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 */
)
{
free(mblock); /* Discard the memory block with POSIX API */
}
#endif
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