188 lines
6.0 KiB
C
188 lines
6.0 KiB
C
/*------------------------------------------------------------------------*/
|
|
/* Sample Code of OS Dependent Functions for FatFs */
|
|
/* (C)ChaN, 2018 */
|
|
/*------------------------------------------------------------------------*/
|
|
//#include <cmsis_os2.h>
|
|
#include <FreeRTOS.h>
|
|
#include <portable.h>
|
|
#include <semphr.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <task.h>
|
|
|
|
#include "ff.h"
|
|
|
|
#if FF_USE_LFN == 3 /* Dynamic memory allocation */
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* Allocate a memory block */
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
void *ff_memalloc(/* Returns pointer to the allocated memory block (null if not
|
|
enough core) */
|
|
UINT msize /* Number of bytes to allocate */
|
|
)
|
|
{
|
|
/* CMSIS2-RTOS */
|
|
// return osAllocAlign(512, msize); /* Use osAllocAlign alloc 512 bytes
|
|
// aligned buf */
|
|
/* FreeRTOS */
|
|
return pvPortMallocAligned(
|
|
msize, 512); /* Use osAllocAlign alloc 512 bytes aligned buf */
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* Free a memory block */
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
void ff_memfree(void *mblock /* Pointer to the memory block to free (nothing to
|
|
do if null) */
|
|
)
|
|
{
|
|
/* CMSIS2-RTOS */
|
|
// osFree(mblock); /* Free the memory block with POSIX API */
|
|
/* FreeRTOS */
|
|
vPortFree(mblock); /* Free the memory block with POSIX API */
|
|
}
|
|
|
|
#endif
|
|
|
|
#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.
|
|
*/
|
|
|
|
// const osMutexDef_t Mutex[FF_VOLUMES]; /* Table of CMSIS-RTOS mutex */
|
|
|
|
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 */
|
|
)
|
|
{
|
|
/* Win32 */
|
|
// *sobj = CreateMutex(NULL, FALSE, NULL);
|
|
// return (int)(*sobj != INVALID_HANDLE_VALUE);
|
|
|
|
/* uITRON */
|
|
// T_CSEM csem = {TA_TPRI,1,1};
|
|
// *sobj = acre_sem(&csem);
|
|
// return (int)(*sobj > 0);
|
|
|
|
/* uC/OS-II */
|
|
// OS_ERR err;
|
|
// *sobj = OSMutexCreate(0, &err);
|
|
// return (int)(err == OS_NO_ERR);
|
|
|
|
/* FreeRTOS */
|
|
*sobj = (FF_SYNC_t)xSemaphoreCreateMutex();
|
|
return (int)(*sobj != NULL);
|
|
|
|
/* CMSIS-RTOS */
|
|
// *sobj = osMutexCreate(&Mutex[vol]);
|
|
// return (int)(*sobj != NULL);
|
|
|
|
/* CMSIS2-RTOS */
|
|
// *sobj = osMutexNew(NULL);
|
|
// return (int)(*sobj != NULL);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* 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 */
|
|
)
|
|
{
|
|
/* Win32 */
|
|
// return (int)CloseHandle(sobj);
|
|
|
|
/* uITRON */
|
|
// return (int)(del_sem(sobj) == E_OK);
|
|
|
|
/* uC/OS-II */
|
|
// OS_ERR err;
|
|
// OSMutexDel(sobj, OS_DEL_ALWAYS, &err);
|
|
// return (int)(err == OS_NO_ERR);
|
|
|
|
/* FreeRTOS */
|
|
vSemaphoreDelete(sobj);
|
|
return 1;
|
|
|
|
/* CMSIS-RTOS */
|
|
// return (int)(osMutexDelete(sobj) == osOK);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* 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 */
|
|
)
|
|
{
|
|
/* Win32 */
|
|
// return (int)(WaitForSingleObject(sobj, FF_FS_TIMEOUT) == WAIT_OBJECT_0);
|
|
|
|
/* uITRON */
|
|
// return (int)(wai_sem(sobj) == E_OK);
|
|
|
|
/* uC/OS-II */
|
|
// OS_ERR err;
|
|
// OSMutexPend(sobj, FF_FS_TIMEOUT, &err));
|
|
// return (int)(err == OS_NO_ERR);
|
|
|
|
/* FreeRTOS */
|
|
return (int)(xSemaphoreTake(sobj, FF_FS_TIMEOUT) == pdTRUE);
|
|
|
|
/* CMSIS-RTOS */
|
|
// return (int)(osMutexWait(sobj, FF_FS_TIMEOUT) == osOK);
|
|
|
|
/* CMSIS2-RTOS */
|
|
// return (int)(osMutexAcquire(sobj, FF_FS_TIMEOUT) == osOK);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* 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 */
|
|
)
|
|
{
|
|
/* Win32 */
|
|
// ReleaseMutex(sobj);
|
|
|
|
/* uITRON */
|
|
// sig_sem(sobj);
|
|
|
|
/* uC/OS-II */
|
|
// OSMutexPost(sobj);
|
|
|
|
/* FreeRTOS */
|
|
xSemaphoreGive(sobj);
|
|
|
|
/* CMSIS-RTOS */
|
|
// osMutexRelease(sobj);
|
|
}
|
|
|
|
#endif
|