# define the cpu used by the saml21 board
  export CPU = saml21
  export CPU_MODEL = saml21j18a
  export CFLAGS += -D__SAML21J18A__
  
  # setup serial terminal
  PORT_LINUX ?= /dev/ttyACM0
  include $(RIOTBOARD)/Makefile.include.serial
  
  # this board uses openocd
  include $(RIOTBOARD)/Makefile.include.openocd