PROGRAMMER ?= uf2conv

ifneq (,$(filter uf2conv adafruit-nrfutil,$(PROGRAMMER)))

  # The Adafruit nRF52 Bootloader currently only really supports
  # two MCUs. Set the according Family Flag and SoftDevice version if
  # not set already.
  ifneq (,$(filter nrf52833xxaa,$(CPU_MODEL)))
    UF2CONV_FLAGS = -f 0x621E937A
    ADANRFUTIL_FLAGS = --dev-type 0x0052

    # The Adafruit nRF52 Bootloader has a static MBR at the first 4k
    # and a 38k UF2 Bootloader at the end, leaving 972k (nRF52840) or 460k
    # (nRF52833) for the application when not using the SoftDevice.
    # SoftDevice v6 uses an additional 114k and SoftDevice v7 uses 118k.
    # The option "DROP" overrides any SoftDevice, making a reflash of the
    # bootloader necessary if i.a. Arduino or CircuitPython
    # are to be used again.
    ifneq (,$(filter DROP,$(UF2_SOFTDEV)))
      ROM_OFFSET = 0x1000
      ROM_LEN    = 0x7f000

    else ifneq (,$(filter SD611,$(UF2_SOFTDEV)))
      ROM_OFFSET = 0x26000
      ROM_LEN    = 0x5a000
      ADANRFUTIL_FLAGS += --sd-req 0x00B6

    else ifneq (,$(filter SD730,$(UF2_SOFTDEV)))
      ROM_OFFSET = 0x27000
      ROM_LEN    = 0x59000
      ADANRFUTIL_FLAGS += --sd-req 0x0123

    else
      $(error Unsupported SoftDevice Version $(UF2_SOFTDEV).)
    endif

  else ifneq (,$(filter nrf52840xxaa,$(CPU_MODEL)))
    UF2CONV_FLAGS = -f 0xADA52840
    ADANRFUTIL_FLAGS = --dev-type 0x0052

    ifneq (,$(filter DROP,$(UF2_SOFTDEV)))
      ROM_OFFSET = 0x1000
      ROM_LEN    = 0xf3000

    else ifneq (,$(filter SD611,$(UF2_SOFTDEV)))
      ROM_OFFSET = 0x26000
      ROM_LEN    = 0xda000
      ADANRFUTIL_FLAGS += --sd-req 0x00B6

    else ifneq (,$(filter SD730,$(UF2_SOFTDEV)))
      ROM_OFFSET = 0x27000
      ROM_LEN    = 0xd9000
      ADANRFUTIL_FLAGS += --sd-req 0x0123

    else
      $(error Unsupported SoftDevice Version $(UF2_SOFTDEV).)
    endif

  else
    $(error Unsupported CPU $(CPU_MODEL) for Adafruit nRF52 Bootloader.)
  endif

  # Driver can take some time to get mounted
  PREFLASH_DELAY ?= 3
  include $(RIOTMAKE)/tools/usb_board_reset.mk
endif

PROGRAMMERS_SUPPORTED += uf2conv
PROGRAMMERS_SUPPORTED += adafruit-nrfutil

# HACK: replicate dependency resolution in Makefile.dep, only works
# if `USEMODULE` or `DEFAULT_MODULE` is set by the command line or in the
# application Makefile.
ifeq (,$(filter stdio_%,$(DISABLE_MODULE) $(USEMODULE)))
  RIOT_TERMINAL ?= jlink
endif

include $(RIOTBOARD)/common/nrf52/Makefile.include