RTOS/MSP432P4111: RTOS/MSP432P4111

I was able to try the following scenario successfully by modifying "fatsd" example.

• SD card not inserted
  • Call "SDFatFS_open" (returns valid handle)
  • Call fopen in "w+" mode (returns NULL handler)
  • Call "SDFatFS_close" (with the handle returned by SDFatFS_open)
• SD card inserted
  • Call "SDFatFS_open" (returns valid handle)
  • Call fopen (returns valid handler)

The following is the code snippet to run with the above scenario. This code snippet is a modification of the fatsd.c file.

    bool bFirst = true;

    /* Run a loop till fopen returns a valid handle */
    while(sdfatfsHandle == NULL)
    {
        /* Mount and register the SD Card */
        sdfatfsHandle = SDFatFS_open(Board_SDFatFS0, DRIVE_NUM);
        if (sdfatfsHandle == NULL) {
            Display_printf(display, 0, 0, "Error starting the SD card\n");
            while(1);
        }

        /* Try to open the source file */
        /* Open file for both reading and writing */
        src = fopen(inputfile, "w+");
        if (!src) {
            if(bFirst)
            {
                Display_printf(display, 0, 0, "SD card not found.\nPlease "
                        "insert SD Card\n");
                bFirst = false;
            }

            /* SD card might not have been inserted. Unmount and unregister
             * the SD card. */
            SDFatFS_close(sdfatfsHandle);

            /* Clear the handle to try to mount the SD card again in the hope
             * that SD card is inserted. */
            sdfatfsHandle = NULL;
        }
        else{
            /* If we reached here, it means the SD card is inserted and a file
             *  has been opened for reading and writing */
            Display_printf(display, 0, 0, "SD Card is inserted\n");
        }
    }

    fwrite(textarray, 1, strlen(textarray), src);
    fflush(src);

    /* Reset the internal file pointer */
    rewind(src);

    Display_printf(display, 0, 0, "New file created\n");

This code snippet should be included between the following lines in the file fatsd.c

    Display_printf(display, 0, 0,
        "You will get errors if your SD card is not formatted with a filesystem.\n");

    /* Now output the outputfile[] contents onto the console */
    dst = fopen(outputfile, "r");
    if (!dst) {

Hope this helps!

Thanks,

Sai