# define the cpu used by the arduino due board
  export CPU = sam3
  export CPU_MODEL = sam3x8e
  
  # define the default port depending on the host OS
  PORT_LINUX ?= /dev/ttyACM0
  PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
  
  # define board specific flasher options
  export FLASHER = $(RIOTBOARD)/$(BOARD)/dist/flash.sh
  export OFLAGS = -O binary
  
  # setup serial terminal
  include $(RIOTBOARD)/Makefile.include.serial