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danielblesener9
danielblesener9
Associate III
May 17, 2018
Question

Bootloader loading File Object Structure Not Returning FR_OK

  • May 17, 2018
  • 4 replies
  • 1217 views
Posted on May 17, 2018 at 18:45

Hi, I am a bit stumped at the moment. I attached the files that use the main code.

In usbh_usr.c, the function 'USBH_USR_ReadWriteFirmware(void)' is the ffucntion that attempts to open the file. 

The line 'if(f_open(&file, '0:g4_firmware.bin',FA_READ) == FR_OK)' is not returning true even though I have a bin file with that name.

f_open is in ff.c

It looks good to me? Does anyone see something wrong?

I am using Keil 5.18, and an STM32F2.

Thanks for you help,

Daniel

    This topic has been closed for replies.

    4 replies

    Tesla DeLorean
    Tesla DeLorean
    Guru
    May 17, 2018
    Posted on May 17, 2018 at 19:18

    But what error specifically is it returning?

    Are long file names supported?

    Is this an EXFAT volume?

    Is the volume mounted?

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    danielblesener9
    danielblesener9Author
    Associate III
    May 17, 2018
    Posted on May 17, 2018 at 19:40

    Good question.

    When entering f_open, this is the order of events.

    After chk_mounted, res = 0.

    After follow_path, res = 0x4 --> FR_NO_FILE

    But I have a file there. 

    I believe this is FAT32.

    danielblesener9
    danielblesener9Author
    Associate III
    May 17, 2018
    Posted on May 17, 2018 at 19:49

    It returns that value from the function static FRESULT dir_next(DIR *pDir, BOOL bStreach) 

    At this point:

    wi = pDir->index + 1;

    if((wi == 0) || (pDir->sect == 0)){

    //Report EOT when index has reached 65535

    return FR_NO_FILE; //Hitting here

    }0690X0000060KowQAE.png

    This is pDire when I hit the 

    FR_NO_FILE in the code shown above.

    Tesla DeLorean
    Tesla DeLorean
    Guru
    May 17, 2018
    Posted on May 17, 2018 at 19:56

     ,

     ,

    Probably should review setting in ffconf.h, these would be controlling.

    Would expect the FatFs code to be fine, issues going to be with other code and settings.

    ♯ if 1 // DIR-CONSOLE

     ,

     , puts('Display Directory'),

     , {

     ,

     , , , FRESULT res,

     ,

     , , , DIR dir,

     ,

     , , , char *path,

     ,

     , , , UINT BytesWritten,

     , , , path = '',

     , , , res = f_opendir(&,dir, path),

    ♯ ifdef DBG

     ,

     , , , if (res != FR_OK)

     ,

     , , , , , printf('res = %d f_opendir\n', res),

     ,

    ♯ endif

     , , , if (res == FR_OK)

     ,

     , , , {

     ,

     , , , , , while(1)

     ,

     , , , , , {

     ,

     , , , , , , , FILINFO fno,

     ,

     , , , , , , , char str[256],

     ,

     , , , , , , , char *s = str,

     , , , , , , , res = f_readdir(&,dir, &,fno),

    ♯ ifdef DBG

     ,

     , , , , , , , if (res != FR_OK)

     ,

     , , , , , , , , , printf('res = %d f_readdir\n', res),

     ,

    ♯ endif

     , , , , , , , if ((res != FR_OK) || (fno.fname[0] == 0))

     ,

     , , , , , , , , , break,

     , , , , , , , printf('%c%c%c%c ',

     ,

     , , , , , , , , , ((fno.fattrib &, AM_DIR) ? 'D' : '-'),

     ,

     , , , , , , , , , ((fno.fattrib &, AM_RDO) ? 'R' : '-'),

     ,

     , , , , , , , , , ((fno.fattrib &, AM_SYS) ? 'S' : '-'),

     ,

     , , , , , , , , , ((fno.fattrib &, AM_HID) ? 'H' : '-') ),

     , , , , , , , printf('%10d ', (int)fno.fsize),

     , , , , , , , printf('%s/%s\n', path, fno.fname),

     ,

     , , , , , }

     ,

     , , , }

     ,

     , }

     ,

    ♯ endif // DIR-CONSOLE
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