plant_car/middleware/fatfs/ffsystem.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