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			171 lines
		
	
	
		
			4.9 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
		
		
			
		
	
	
			171 lines
		
	
	
		
			4.9 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
|  | /*------------------------------------------------------------------------*/ | ||
|  | /* Sample Code of OS Dependent Functions for FatFs                        */ | ||
|  | /* (C)ChaN, 2018                                                          */ | ||
|  | /*------------------------------------------------------------------------*/ | ||
|  | 
 | ||
|  | 
 | ||
|  | #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 */ | ||
|  | ) | ||
|  | { | ||
|  |     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 (nothing to do if null) */ | ||
|  | ) | ||
|  | { | ||
|  |     free(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 = xSemaphoreCreateMutex();
 | ||
|  | //	return (int)(*sobj != NULL);
 | ||
|  | 
 | ||
|  |     /* CMSIS-RTOS */ | ||
|  | //	*sobj = osMutexCreate(&Mutex[vol]);
 | ||
|  | //	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);
 | ||
|  | } | ||
|  | 
 | ||
|  | 
 | ||
|  | /*------------------------------------------------------------------------*/ | ||
|  | /* 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
 | ||
|  | 
 |