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rl-flashfs : fputs/fgets doesn't works

Fournier Michaël

Hello,
I'm trying to setup the flash-fs library with SPI SD-card on STM32F100 device.
I've modified the SPI_STM32F100x.c driver to match with SPI2 device and needed I/O (CS, SD detect..)

The finit(), fformat() and fopen() functions are working. I'm able to format the card, create new files or open an existing file.

The problem comes when I try to write data into a file : nothing is written on the file. However, the fputs() function I'm using is returning 0 (OK).

I'm using RTX and the flash-fs library is used in a task :


/* Wait until the Card is ready*/
retv = finit ("M0:");
if(retv == 0)
{
        // Card initialized sucessfully

        // Open/create output file
        fout = fopen("M0:\\test.txt","w");
        if (fout != NULL)
        {
                // Write text in the file
                salut = fputs("fhghr", fout);

                // Close file
                fclose (fout);
        }
}
else if (retv == 1)
{
        // Card not initialized
}
else if(retv == 2)
{
        // Card is not formatted
        retv = fformat ("M0:Breitling /FAT32");
        if (retv == 0)
        {
                // Format OK
        }
        else
        {
                // Cannot format
        }

Can someone try to help me?

Thanks and bests regards

Michaël

Parents
  • 0

    Keil example. Notice the difference from yours:

    #include <rtl.h>
#include <stdio.h>

void tst_fputs (void) {
  FILE *fout;

  fout = fopen ("Test.txt","w");
  if (fout != NULL) {
    fputs("This is an example for fputs.\n", fout);
    fclose (fout);
  }
}

Reply
  • 0

    Keil example. Notice the difference from yours:

    #include <rtl.h>
#include <stdio.h>

void tst_fputs (void) {
  FILE *fout;

  fout = fopen ("Test.txt","w");
  if (fout != NULL) {
    fputs("This is an example for fputs.\n", fout);
    fclose (fout);
  }
}

Children
  • 0 in reply to F F

    Thank's for your help.
    But this doesn't change anything and the return code of fputs is always 0, what means that the function terminates correctly...
    When I look on SPI signals, this is no activity during fputs() function execution. On fclose() function, some frames are sent but I don't see any data stream with expected content.
    I think the library is not writting anything on the SD card during fputs() execution..

    Bests regards

    Michaël

  • 0 in reply to Fournier Michaël

    In addition, the fgets() function is also returning 0 in case the file exists on SD-Card. But I'm not able to read any content of this file (I've created the file using a PC), the returned string is null.

  • 0 in reply to Fournier Michaël

    Note that your test string:

     // Write text in the file
 salut = fputs("fhghr", fout);

    does not have one specific addition that the Keil string has:

     fputs("This is an example for fputs.\n", fout);

    i might be off base here, but as I remember it all strings need to either be flushed or terminated with the carrage return to be written to memory. When I tested this is a subtle distinction that is not highlighted...