mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/*------------------------------------------------------------------------*/
|
|
/* Sample Code of OS Dependent Functions for FatFs */
|
|
/* (C)ChaN, 2017 */
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "ff.h"
|
|
#include "sdkconfig.h"
|
|
#ifdef CONFIG_FATFS_ALLOC_PREFER_EXTRAM
|
|
#include "esp_heap_caps.h"
|
|
#endif
|
|
|
|
void* ff_memalloc ( /* Returns pointer to the allocated memory block (null on not enough core) */
|
|
unsigned msize /* Number of bytes to allocate */
|
|
)
|
|
{
|
|
#ifdef CONFIG_FATFS_ALLOC_PREFER_EXTRAM
|
|
return heap_caps_malloc_prefer(msize, 2, MALLOC_CAP_DEFAULT | MALLOC_CAP_SPIRAM,
|
|
MALLOC_CAP_DEFAULT | MALLOC_CAP_INTERNAL);
|
|
#else
|
|
return malloc(msize);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* Free a memory block */
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
void ff_memfree (
|
|
void* mblock /* Pointer to the memory block to free (nothing to do for null) */
|
|
)
|
|
{
|
|
free(mblock); /* Free the memory block with POSIX API */
|
|
}
|
|
|
|
|
|
|
|
|
|
#if FF_FS_REENTRANT /* Mutal exclusion */
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* Create a Synchronization Object */
|
|
/*------------------------------------------------------------------------*/
|
|
/* This function is called in f_mount() function to create a new
|
|
/ synchronization object for the volume, such as semaphore and mutex.
|
|
/ When a 0 is returned, the f_mount() function fails with FR_INT_ERR.
|
|
*/
|
|
|
|
|
|
int ff_cre_syncobj ( /* 1:Function succeeded, 0:Could not create the sync object */
|
|
BYTE vol, /* Corresponding volume (logical drive number) */
|
|
FF_SYNC_t *sobj /* Pointer to return the created sync object */
|
|
)
|
|
{
|
|
*sobj = xSemaphoreCreateMutex();
|
|
return (*sobj != NULL) ? 1 : 0;
|
|
}
|
|
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* 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 ( /* 1:Function succeeded, 0:Could not delete due to an error */
|
|
FF_SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
|
|
)
|
|
{
|
|
vSemaphoreDelete(sobj);
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* 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 */
|
|
)
|
|
{
|
|
return (xSemaphoreTake(sobj, FF_FS_TIMEOUT) == pdTRUE) ? 1 : 0;
|
|
}
|
|
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* 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);
|
|
}
|
|
|
|
#endif // FF_FS_REENTRANT
|