esp-idf/components/fatfs/port/freertos/ffsystem.c

109 wiersze
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