-DEFS = -DATMEGA644
-FLASHCMD = avrdude -p $(MCU_TARGET) -P /dev/ttyUSB0 -c avr911 -U flash:w:$(PRG).hex
-# -U eeprom:w:$(PRG)_eeprom.hex
+DEFS = -D$(call uc, $(MCU_TARGET))
+FLASHCMD = avrdude -p $(MCU_TARGET) -P /dev/ttyUSB0 -c avr911 -U flash:w:# no space at the end
+