LUFA_OPTS += -D VTARGET_ADC_CHANNEL=2
LUFA_OPTS += -D VTARGET_REF_VOLTS=5
LUFA_OPTS += -D VTARGET_SCALE_FACTOR=1
+#LUFA_OPTS += -D VTARGET_USE_INTERNAL_REF
#LUFA_OPTS += -D NO_VTARGET_DETECT
#LUFA_OPTS += -D LIBUSB_DRIVER_COMPAT
#LUFA_OPTS += -D XCK_RESCUE_CLOCK_ENABLE