add msc file explorer example
- add lib/fatfs version 15 - add lib/embedded-cli
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hathach
208
lib/fatfs/source/ffsystem.c
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208
lib/fatfs/source/ffsystem.c
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/*------------------------------------------------------------------------*/
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/* A Sample Code of User Provided OS Dependent Functions for FatFs */
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/*------------------------------------------------------------------------*/
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#include "ff.h"
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#if FF_USE_LFN == 3 /* Use dynamic memory allocation */
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/*------------------------------------------------------------------------*/
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/* Allocate/Free a Memory Block */
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/*------------------------------------------------------------------------*/
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#include <stdlib.h> /* with POSIX API */
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void* ff_memalloc ( /* Returns pointer to the allocated memory block (null if not enough core) */
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UINT msize /* Number of bytes to allocate */
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)
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{
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return malloc((size_t)msize); /* Allocate a new 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 (no effect if null) */
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)
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{
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free(mblock); /* Free the memory block */
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}
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#endif
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#if FF_FS_REENTRANT /* Mutal exclusion */
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/*------------------------------------------------------------------------*/
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/* Definitions of Mutex */
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/*------------------------------------------------------------------------*/
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#define OS_TYPE 0 /* 0:Win32, 1:uITRON4.0, 2:uC/OS-II, 3:FreeRTOS, 4:CMSIS-RTOS */
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#if OS_TYPE == 0 /* Win32 */
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#include <windows.h>
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static HANDLE Mutex[FF_VOLUMES + 1]; /* Table of mutex handle */
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#elif OS_TYPE == 1 /* uITRON */
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#include "itron.h"
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#include "kernel.h"
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static mtxid Mutex[FF_VOLUMES + 1]; /* Table of mutex ID */
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#elif OS_TYPE == 2 /* uc/OS-II */
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#include "includes.h"
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static OS_EVENT *Mutex[FF_VOLUMES + 1]; /* Table of mutex pinter */
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#elif OS_TYPE == 3 /* FreeRTOS */
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#include "FreeRTOS.h"
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#include "semphr.h"
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static SemaphoreHandle_t Mutex[FF_VOLUMES + 1]; /* Table of mutex handle */
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#elif OS_TYPE == 4 /* CMSIS-RTOS */
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#include "cmsis_os.h"
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static osMutexId Mutex[FF_VOLUMES + 1]; /* Table of mutex ID */
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#endif
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/*------------------------------------------------------------------------*/
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/* Create a Mutex */
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/*------------------------------------------------------------------------*/
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/* This function is called in f_mount function to create a new mutex
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/ or semaphore for the volume. When a 0 is returned, the f_mount function
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/ fails with FR_INT_ERR.
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*/
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int ff_mutex_create ( /* Returns 1:Function succeeded or 0:Could not create the mutex */
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int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */
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)
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{
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#if OS_TYPE == 0 /* Win32 */
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Mutex[vol] = CreateMutex(NULL, FALSE, NULL);
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return (int)(Mutex[vol] != INVALID_HANDLE_VALUE);
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#elif OS_TYPE == 1 /* uITRON */
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T_CMTX cmtx = {TA_TPRI,1};
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Mutex[vol] = acre_mtx(&cmtx);
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return (int)(Mutex[vol] > 0);
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#elif OS_TYPE == 2 /* uC/OS-II */
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OS_ERR err;
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Mutex[vol] = OSMutexCreate(0, &err);
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return (int)(err == OS_NO_ERR);
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#elif OS_TYPE == 3 /* FreeRTOS */
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Mutex[vol] = xSemaphoreCreateMutex();
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return (int)(Mutex[vol] != NULL);
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#elif OS_TYPE == 4 /* CMSIS-RTOS */
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osMutexDef(cmsis_os_mutex);
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Mutex[vol] = osMutexCreate(osMutex(cmsis_os_mutex));
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return (int)(Mutex[vol] != NULL);
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#endif
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}
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/*------------------------------------------------------------------------*/
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/* Delete a Mutex */
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/*------------------------------------------------------------------------*/
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/* This function is called in f_mount function to delete a mutex or
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/ semaphore of the volume created with ff_mutex_create function.
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*/
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void ff_mutex_delete ( /* Returns 1:Function succeeded or 0:Could not delete due to an error */
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int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */
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)
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{
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#if OS_TYPE == 0 /* Win32 */
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CloseHandle(Mutex[vol]);
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#elif OS_TYPE == 1 /* uITRON */
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del_mtx(Mutex[vol]);
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#elif OS_TYPE == 2 /* uC/OS-II */
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OS_ERR err;
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OSMutexDel(Mutex[vol], OS_DEL_ALWAYS, &err);
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#elif OS_TYPE == 3 /* FreeRTOS */
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vSemaphoreDelete(Mutex[vol]);
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#elif OS_TYPE == 4 /* CMSIS-RTOS */
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osMutexDelete(Mutex[vol]);
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#endif
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}
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/*------------------------------------------------------------------------*/
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/* Request a Grant to Access the Volume */
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/*------------------------------------------------------------------------*/
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/* This function is called on enter 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_mutex_take ( /* Returns 1:Succeeded or 0:Timeout */
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int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */
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)
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{
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#if OS_TYPE == 0 /* Win32 */
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return (int)(WaitForSingleObject(Mutex[vol], FF_FS_TIMEOUT) == WAIT_OBJECT_0);
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#elif OS_TYPE == 1 /* uITRON */
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return (int)(tloc_mtx(Mutex[vol], FF_FS_TIMEOUT) == E_OK);
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#elif OS_TYPE == 2 /* uC/OS-II */
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OS_ERR err;
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OSMutexPend(Mutex[vol], FF_FS_TIMEOUT, &err));
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return (int)(err == OS_NO_ERR);
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#elif OS_TYPE == 3 /* FreeRTOS */
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return (int)(xSemaphoreTake(Mutex[vol], FF_FS_TIMEOUT) == pdTRUE);
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#elif OS_TYPE == 4 /* CMSIS-RTOS */
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return (int)(osMutexWait(Mutex[vol], FF_FS_TIMEOUT) == osOK);
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#endif
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}
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/*------------------------------------------------------------------------*/
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/* Release a Grant to Access the Volume */
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/*------------------------------------------------------------------------*/
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/* This function is called on leave file functions to unlock the volume.
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*/
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void ff_mutex_give (
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int vol /* Mutex ID: Volume mutex (0 to FF_VOLUMES - 1) or system mutex (FF_VOLUMES) */
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)
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{
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#if OS_TYPE == 0 /* Win32 */
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ReleaseMutex(Mutex[vol]);
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#elif OS_TYPE == 1 /* uITRON */
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unl_mtx(Mutex[vol]);
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#elif OS_TYPE == 2 /* uC/OS-II */
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OSMutexPost(Mutex[vol]);
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#elif OS_TYPE == 3 /* FreeRTOS */
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xSemaphoreGive(Mutex[vol]);
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#elif OS_TYPE == 4 /* CMSIS-RTOS */
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osMutexRelease(Mutex[vol]);
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#endif
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}
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#endif /* FF_FS_REENTRANT */
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