# burn firmware
avrdude -p atxmega128a4u -P usb -c dragon_pdi -U flash:w:Keyboard.hex

# burn bootloader
avrdude -p atxmega128a4u -P usb -c dragon_pdi -U boot:w:katy-bootloader.hex

# factory preset fuses 1245: 0x00 0xFF 0xFE 0xFF
# factory preset fuses boot application but there is no application or bootloader preloaded
# my fuses (application boot): 0x00 0xFD 0xFF 0xED
# my fuses (bootlaoder  boot): 0x00 0xBD 0xFF 0xED

# read fuses
avrdude -p atxmega128a4u -P usb -c dragon_pdi -U fuse1:r:-:h -U fuse2:r:-:h -U fuse4:r:-:h -U fuse5:r:-:h

# set my fuses (application boot)
avrdude -p atxmega128a4u -P usb -c dragon_pdi -U fuse1:w:0x00:m -U fuse2:w:0xFD:m -U fuse4:w:0xFF:m -U fuse5:w:0xED:m

# set bootloader boot
avrdude -p atxmega128a4u -P usb -c dragon_pdi -U fuse2:w:0xBD:m

# set application boot
avrdude -p atxmega128a4u -P usb -c dragon_pdi -U fuse2:w:0xFD:m