Dear Sir I am getting issue While POrting FAT32 Driver using SDCard on Virtex-4 Code.is compile.At a run time i getting issue of File Write to SDCard.I am using Follwing code Error:- Its shows NoValied FAT32  File System on SDCard..So please guide for fixed this issue :-E- SendCmd18,0 (1)
Open File to write Failure…error = 13
-Open File fil.fs = 0
-Open File fil.id = 0
-Open File fil.dsect = 0
-Open File fil.clust = 0
-Open File fil.fsize = 0 Write a text data to the Card.
write file Failure…error = 9 Close the file writeen.
Open File to write… void prvTaskD (void* pvParameters)
{ SPI_Int(); (void) pvParameters;                    // Just to stop compiler warnings.     for (;;) {
    static FRESULT rc;   /* Result code */
        static FATFS fatfs;  /* File system object */
        static FIL fil;   /* File object */
        static DIR dir;   /* Directory object */
        static FILINFO fno;  /* File information object */
        int i ;
        char key ;         static UINT bw, br, numread;
        static BYTE buff;
        BYTE Message = “HELLO from www.letrungthang.blogspot.com” ; // message’s content
        TCHAR *FilePath = “MESSAGE.TXT” ; // file path         f_mount(0, &fatfs);  /* Register volume work area (never fails) */         // File testing
        printf(”Open File to write…nr”);         if( rc != FR_OK ) {
                  //  printf(”-E- f_mount pb: 0x%X (%s)nr”, rc);
                    return 0;
                }                // Test if the disk is formated
                rc = f_opendir (&dir,STR_ROOT_DIRECTORY);
                if(rc == FR_OK ){                     // erase sdcard to re-format it ?
                    printf(”-I- The disk is already formated.nr”);                     // Display the file tree
                    printf(”-I- Display files contained on the SDcard :nr”);
                 //   FF_ScanDir(STR_ROOT_DIRECTORY);                     printf(”-I- Do you want to erase the sdcard to re-format disk ? (y/n)!nr”);                     key = ‘y’;
                    if( (key == ‘y’) ||  (key == ‘Y’))
                    {
                      for(i=0;i<100;i++) {
                  //    MEDSdcard_EraseBlock(&medias, i);
                      }
                      printf(”-I- Erase the first 100 blocks complete !nr”);
                      rc = FR_NO_FILESYSTEM;
                    }
                }         //————————
        //————————
        rc = f_open(&fil, FilePath, FA_WRITE | FA_OPEN_ALWAYS); /* Create a file on the drive 0 */
        if(rc)  rc = f_open(&fil, FilePath, FA_WRITE | FA_OPEN_ALWAYS);// try again once         if (!rc) {
          printf(”Open File to write successful…nr”);
        }else  {
          printf(”Open File to write Failure…error = %unr”,rc);
        }
        printf(”-Open File fil.fs = %dnr”,fil.fs);
        printf(”-Open File fil.id = %dnr”,fil.id);
        printf(”-Open File fil.dsect = %dnr”,fil.dsect);
        printf(”-Open File fil.clust = %dnr”,fil.clust);
        printf(”-Open File fil.fsize = %dnr”,fil.fsize);         printf(”nWrite a text data to the Card.nr”);         rc = f_write(&fil, Message, sizeof(Message)-1, &bw); // write file         if (!rc) {
          printf(”write success. %u bytes written.nr”, bw);
        }else  {
          printf(”write file Failure…error = %unr”,rc);
        }         printf(”nClose the file writeen.nr”);
        rc = f_close(&fil); // close file         if (!rc) {
          printf(”File writeen closed success.nr”);
        }else  {
          printf(”File close writeen was failure…error = %unr”,rc);
        }         //————————
        //————————
        printf(”nrOpen File to read…nr”);
        rc = f_open(&fil, FilePath, FA_READ | FA_OPEN_EXISTING); /* Create a file on the drive 0 */
        if(rc)  rc = f_open(&fil, FilePath, FA_READ | FA_OPEN_EXISTING);// try again once         printf(”-Open File fil.fs = %dnr”,fil.fs);
        printf(”-Open File fil.id = %dnr”,fil.id);
        printf(”-Open File fil.dsect = %dnr”,fil.dsect);
        printf(”-Open File fil.clust = %dnr”,fil.clust);
        printf(”-Open File fil.fsize = %dnr”,fil.fsize);         if (!rc) {
          printf(”Open File to read successful…nr”);
        }else  {
          printf(”Open File to read Failure…error = %unr”,rc);
        }         printf(”nRead the file content from the Card:nr”);
        for (;;) {
          rc = f_read(&fil, buff, sizeof(buff), &br);     /* Read a chunk of file */
          if (rc || !br) break;         /* Error or end of file */       //    for (int i = 0; i < br; i++)                /* Type the data */
        //    putchar(buff_);           numread += br ;
        }         if (!rc) {
           printf(”nr%u bytes read.nr”, numread);
        }else  {
           printf(”read file Failure…error = %unr”,rc);
         }         printf(”nClose the file.nr”);
        rc = f_close(&fil); // close file         if (!rc) {
          printf(”File closed.nr”);
        }else  {
          printf(”File close Failure…error = %unr”,rc);
        }
        //————————-
        //————————
        // Directory testing
        printf(”nOpen root directory.nr”);
        rc = f_opendir(&dir, “”);         if (!rc) {
          printf(”Open Dir OK.nr”);
        }else  {
          printf(”Open Dir Failure…error = %unr”,rc);
        }         printf(”nDirectory listing…nr”);
        for (;;) {
          rc = f_readdir(&dir, &fno); /* Read a directory item */
          if (rc || !fno.fname) break; /* Error or end of dir */           if (fno.fattrib & AM_DIR)
            printf(”     %snr”, fno.fname); // is Directory
          else
            printf(”%8lu  %snr”, fno.fsize, fno.fname); // is file
        }         if (!rc) {
          printf(”Listing Dir complete.nr”);
        }else  {
          printf(”Listing Dir Failure…error = %unr”,rc);
        }         printf(”nTest completed.nr”);
        f_mount(0, NULL);/* Unregister work area prior to discard it */      //     vTaskDelay(1000);     }
}_

Absolutely no idea.  This is not FreeRTOS code, a system I have never used, and has nothing to do with FreeRTOS as far as I can see.  Sorry, but I can’t help.  Where did you get the file system from?  I would recommend asking your questions there. Regards.