if(boot_state == 2){
        if(eeprom_read_byte(0x0) == 0xFF){
           pf_mount(&Fatfs);    /* Initialize file system */
           if(pf_open("app.bin") == FR_OK){
               DWORD fa;    /* Flash address */
               WORD br; /* Bytes read */
               uint8_t i = 0;
               sendchar('*');

               sendchar(0x0d);
               sendchar(0x0a);
               for (fa = 0; fa < 0x3d000; fa += SPM_PAGESIZE) { /* Update all application pages */
                   PROGLED_PORT ^=  (1<<PROGLED_PIN);   // turn LED ON
                   delay_ms(50);
                   memset(Buff, 0xFF, SPM_PAGESIZE);        /* Clear buffer */
                   pf_read(Buff, SPM_PAGESIZE, &br);        /* Load a page data */
                   flash_erase(fa);                 /* Erase a page */
                   memset(Buff, 0xFF, SPM_PAGESIZE);    /* Clear buffer */
                   pf_read(Buff, SPM_PAGESIZE, &br);    /* Load a page data */
                   if (br) flash_write(fa, Buff);       /* Write it if the data is available */
                   sendchar('x');
               }
               sendchar(0x0d);
               sendchar(0x0a);
               check = 0;
               eeprom_write_byte (0x0, 0xDD);
           }
        }
    }