Dateierzeugung wie von Geisterhand (ATMega32)

int main(void){

  FRESULT result;

    sei(); 

//  PORTB=255;

//  DDRB=255;

  //DDRC=255;

  DDR_SPI = (1<<DD_MOSI)|(1<<DD_SCK)|(1<<DD_SS);

  TCCR2=(1<<WGM21)|7;    // 10,8kHz

  OCR2=(XTAL_CPU/102400)-1;

  TIMSK|=(1<<OCIE2);

  f_mount(0, &fs);

  copy_file();

  for(;;);

}

unsigned char copy_file(void)

{

     WORD br, bw;         // File R/W count 

     int Index=1;

  char file[]="test.mp3";

  char filetype[]=".mp3";

  char prefix[]="Song";

  char filename[100]={};

    // Open source file on the drive 1

    f_open(&fsrc, file, FA_OPEN_EXISTING | FA_READ);

    for(Index;Index<3;Index++){

    sprintf(filename, "%s%d%s",prefix,Index,filetype);

    // Create destination file 

    f_open(&fdst, filename, FA_CREATE_ALWAYS | FA_WRITE);

    // Copy source to destination

    for (;;) {

      res = f_write(&fdst, buffer, br, &bw);

      if (res || bw < br) break;   // error or disk full

      res = f_read(&fsrc, buffer, sizeof(buffer), &br);

      if (res || br == 0) break;   // error or eof

      }

    f_close(&fdst);

  }

    // Close open files

    f_close(&fsrc);

}