165 lines
6.1 KiB
C
165 lines
6.1 KiB
C
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/*------------------------------------------------------------------------*/
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/* Sample code of OS dependent controls for FatFs */
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/* (C)ChaN, 2014 */
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/* Portions COPYRIGHT 2017 STMicroelectronics */
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/* Portions Copyright (C) 2014, ChaN, all right reserved */
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/*------------------------------------------------------------------------*/
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/**
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******************************************************************************
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*
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* <h2><center>© Copyright (c) 2017 STMicroelectronics International N.V.
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* All rights reserved.</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted, provided that the following conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of other
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* contributors to this software may be used to endorse or promote products
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* derived from this software without specific written permission.
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* 4. This software, including modifications and/or derivative works of this
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* software, must execute solely and exclusively on microcontroller or
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* microprocessor devices manufactured by or for STMicroelectronics.
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* 5. Redistribution and use of this software other than as permitted under
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* this license is void and will automatically terminate your rights under
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* this license.
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*
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* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
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* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
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* SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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#include "../ff.h"
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#if _FS_REENTRANT
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/*------------------------------------------------------------------------*/
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/* Create a Synchronization Object */
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/*------------------------------------------------------------------------*/
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/* This function is called in f_mount() function to create a new
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/ synchronization object, such as semaphore and mutex. When a 0 is returned,
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/ the f_mount() function fails with FR_INT_ERR.
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*/
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int ff_cre_syncobj ( /* 1:Function succeeded, 0:Could not create the sync object */
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BYTE vol, /* Corresponding volume (logical drive number) */
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_SYNC_t *sobj /* Pointer to return the created sync object */
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)
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{
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int ret;
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osSemaphoreDef(SEM);
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*sobj = osSemaphoreCreate(osSemaphore(SEM), 1);
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ret = (*sobj != NULL);
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return ret;
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}
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/*------------------------------------------------------------------------*/
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/* Delete a Synchronization Object */
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/*------------------------------------------------------------------------*/
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/* This function is called in f_mount() function to delete a synchronization
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/ object that created with ff_cre_syncobj() function. When a 0 is returned,
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/ the f_mount() function fails with FR_INT_ERR.
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*/
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int ff_del_syncobj ( /* 1:Function succeeded, 0:Could not delete due to any error */
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_SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
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)
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{
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osSemaphoreDelete (sobj);
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return 1;
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}
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/*------------------------------------------------------------------------*/
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/* Request Grant to Access the Volume */
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/*------------------------------------------------------------------------*/
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/* This function is called on entering file functions to lock the volume.
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/ When a 0 is returned, the file function fails with FR_TIMEOUT.
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*/
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int ff_req_grant ( /* 1:Got a grant to access the volume, 0:Could not get a grant */
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_SYNC_t sobj /* Sync object to wait */
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)
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{
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int ret = 0;
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if(osSemaphoreWait(sobj, _FS_TIMEOUT) == osOK)
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{
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ret = 1;
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}
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return ret;
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}
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/*------------------------------------------------------------------------*/
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/* Release Grant to Access the Volume */
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/*------------------------------------------------------------------------*/
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/* This function is called on leaving file functions to unlock the volume.
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*/
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void ff_rel_grant (
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_SYNC_t sobj /* Sync object to be signaled */
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)
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{
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osSemaphoreRelease(sobj);
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}
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#endif
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#if _USE_LFN == 3 /* LFN with a working buffer on the heap */
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/*------------------------------------------------------------------------*/
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/* Allocate a memory block */
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/*------------------------------------------------------------------------*/
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/* If a NULL is returned, the file function fails with FR_NOT_ENOUGH_CORE.
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*/
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void* ff_memalloc ( /* Returns pointer to the allocated memory block */
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UINT msize /* Number of bytes to allocate */
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)
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{
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return ff_malloc(msize); /* Allocate a new memory block with POSIX API */
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}
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/*------------------------------------------------------------------------*/
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/* Free a memory block */
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/*------------------------------------------------------------------------*/
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void ff_memfree (
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void* mblock /* Pointer to the memory block to free */
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)
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{
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ff_free(mblock); /* Discard the memory block with POSIX API */
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}
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#endif
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