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
+#LUFA_OPTS += -D INVERTED_ISP_MISO
+#LUFA_OPTS += -D FIRMWARE_VERSION_MINOR=0x11
 
 
 # Create the LUFA source path variables by including the LUFA root makefile
        $(REMOVEDIR) .dep
 
 doxygen:
-       @echo Generating Project Documentation...
-       @doxygen Doxygen.conf
+       @echo Generating Project Documentation \($(TARGET)\)...
+       @if ( ( cat Doxygen.conf ; echo "HTML_STYLESHEET=$(LUFA_PATH)/LUFA/DoxygenPages/Style/Style.css" ) | doxygen - 2>&1 | grep -v "warning: ignoring unsupported tag" ;); then \
+         exit 1; \
+       fi;
        @echo Documentation Generation Complete.
 
 clean_doxygen: