RTOS/OMAP-L138: Destroyed data - SYS/BIOS - OMAPL138 - FatFs

Patryk_93

Part Number: OMAP-L138
Other Parts Discussed in Thread: OMAPL138

Tool/software: TI-RTOS

I used FatFs in my project with Sys/BIOS. I have a problem, because when I writting data to SD card I sometimes lost some data (sometimes all). When I push card to PC I don't see any files but it is partially occupied. In ffconfig.h I have FS_REENTRANT = 0 (maybe here is problem?). I tested different cards.

My short code is below.

...
FATFS_init();
...
FATFS_open(0U, NULL, &fatfsHandle);
...
for (j=0; j<20; j++){
	sprintf(fname, "aa_%i.txt", j);
	
	fresult = f_open(&MyFile, fname, FA_OPEN_ALWAYS | FA_WRITE);
	
	for(i = 0; i < 10; i++){
		f_lseek(&MyFile, f_size(&MyFile));
		fresult = f_write(&MyFile, tab_string, ile_byte, (void *)&wbytes);
		if(fresult == FR_OK){	
		//...
		}
		else{
		//...
		}
	}
	fresult = f_close(&MyFile);
}
...
Task_sleep(20000); //I'm pulling out the card

over 7 years ago

0 Yordan Kovachev over 7 years ago

TI__Guru**** 161600 points

Hi,

Which Processor SDK RTOS version are you using?

Best Regards,
Yordan

0 Patryk_93 over 7 years ago in reply to Yordan Kovachev

Intellectual 800 points

I am using:
-> processor_sdk_rtos_omapl138_5_01_00_11
-> bios_6_73_00_12
-> pdk_omapl138_1_0_6

0 Sahin Okur over 7 years ago in reply to Patryk_93

TI__Mastermind 27355 points

Hello,

We have an MMCSD FatFs example in Processor SDK. Can you take a look at it for reference? There may be something you have missed.

You can create the example by following the instructions here:
software-dl.ti.com/.../index_device_drv.html

Documentation on MMCSD can be found here:
software-dl.ti.com/.../index_device_drv.html

0 Patryk_93 over 7 years ago in reply to Sahin Okur

Intellectual 800 points

My code is similar and I have not missed anything.
I noticed that when I use threads in which are while(1) loop + task_sleep(X) I have a problem with write date to sd card.
After some time, the data is damaged (different time each time).
Loops are empty, it does not change anything
e.g content other task:
while (1)
{
Task_sleep (5);
}
When I deleted all task (or while(1) loops) the problem does not occur.
The task to write data to the SD card has the highest priority.

Where is the problem?

0 Patryk_93 over 7 years ago in reply to Patryk_93

Intellectual 800 points

In the ffconfig.h header I defined FF_FS_REENTRANT = 1 and my handlers function added to the project:

/*
 * Copyright (c) 2012, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 * ======== syncsysbios.c ========
 *
 * Synchronization support for FatFS using SYS/BIOS
 */

#include <xdc/std.h>
#include <ti/sysbios/knl/Semaphore.h>

#include "ff.h"

typedef int BOOL;

#if FF_FS_REENTRANT

/*------------------------------------------------------------------------
 * Create a Synchronization Object for a Volume
 * This function is called in f_mount function to create a new
   synchronization object, such as semaphore and mutex. When a FALSE is
  returned, the f_mount function fails with FR_INT_ERR.
  returns: TRUE: Function succeeded, FALSE:Could not create due to any error
*/

BOOL ff_cre_syncobj (
        BYTE vol,        /* Corresponding logical drive being processed */
        FF_SYNC_t* sobj    /* Pointer to return the created sync object */
)
{
    int ret;

    *sobj = Semaphore_create(1, NULL, NULL);
    ret = (*sobj != NULL) ? TRUE : FALSE;

    return ret;
}



/*------------------------------------------------------------------------*/
/* 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 FALSE is
/  returned, the f_mount function fails with FR_INT_ERR.
/  returns: TRUE: Function succeeded, FALSE: Could not delete due to any error
*/

BOOL ff_del_syncobj (
        FF_SYNC_t sobj  /* Sync object tied to the logical drive to be deleted */
)
{
    Semaphore_delete((Semaphore_Handle *)&sobj);

    return TRUE;
}



/*------------------------------------------------------------------------*/
/* Request Grant to Access the Volume                                     */
/*------------------------------------------------------------------------*/
/* This function is called on entering file functions to lock the volume.
/  When a FALSE is returned, the file function fails with FR_TIMEOUT.
/
/  returns:  TRUE: Got a grant to access the volume, FALSE: Could not get a
/            grant
*/

BOOL ff_req_grant (
        FF_SYNC_t sobj        /* Sync object to wait */
)
{
    return Semaphore_pend((Semaphore_Handle)sobj, FF_FS_TIMEOUT);
}



/*------------------------------------------------------------------------*/
/* 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 */
)
{
    Semaphore_post((Semaphore_Handle)sobj);
}


#endif

0 Sahin Okur over 5 years ago

TI__Mastermind 27355 points

For those that come across this thread, this discussion was continued here: https://e2e.ti.com/support/processors/f/791/t/777118

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RTOS/OMAP-L138: Destroyed data - SYS/BIOS - OMAPL138 - FatFs