# the cpu to build for
  export CPU = stm32f1
  export CPU_MODEL = stm32f103cb
  
  # custom linkerscript
  export LINKER_SCRIPT = stm32f103cb_opencm904.ld
  
  # custom flasher to use with the bootloader
  export FLASHER = $(RIOTBOARD)/$(BOARD)/dist/robotis-loader.py
  export DEBUGGER =
  export DEBUGSERVER =
  
  export OFLAGS = -O binary
  export HEXFILE = $(ELFFILE:.elf=.bin)
  export FFLAGS =
  export DEBUGGER_FLAGS =
  
  # define the default port depending on the host OS
  PORT_LINUX ?= /dev/ttyACM0
  PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
  
  # setup serial terminal
  include $(RIOTMAKE)/tools/serial.inc.mk