RIOT/sys/ztimer/Makefile.dep

#
# ztimer dependencies
#

# "ztimer" is the default meta-module of ztimer
ifneq (,$(filter ztimer,$(USEMODULE)))
  USEMODULE += ztimer_core
  USEMODULE += ztimer_convert_frac
  USEMODULE += ztimer_convert_shift

  # ztimer's auto_init code resides in it's submodule "ztimer_auto_init",
  # but RIOT's auto_init scheme expects "auto_init_ztimer" in DEFAULT_MODULES so
  # it can be disabled (by adding to DISABLE_MODULES).
  #
  # "auto_init_%" modules cannot have further dependencies, so we cannot do
  # "if auto_init_ztimer: use ztimer_auto_init".
  #
  # So, if neither "auto_init" nor "auto_init_ztimer" are disabled, pull in
  # "ztimer_auto_init".
  DEFAULT_MODULE += auto_init_ztimer
  ifeq (,$(filter auto_init auto_init_ztimer,$(DISABLE_MODULE)))
    USEMODULE += ztimer_auto_init
  endif
endif

# unless ztimer_xtimer_compat is used, make xtimer use ztimer_usec as backend.
ifneq (,$(filter ztimer_periph_timer,$(USEMODULE)))
  ifneq  (,$(filter xtimer,$(USEMODULE)))
    ifeq (,$(filter ztimer_xtimer_compat,$(USEMODULE)))
      USEMODULE += xtimer_on_ztimer
    endif
  endif
  ifneq (,$(filter evtimer,$(USEMODULE)))
    USEMODULE += evtimer_on_ztimer
  endif
endif

# make xtimer use ztimer_usec as low level timer
ifneq (,$(filter xtimer_on_ztimer,$(USEMODULE)))
  USEMODULE += ztimer_usec
endif

# make evtimer use ztimer_msec as low level timer
ifneq (,$(filter evtimer_on_ztimer,$(USEMODULE)))
  USEMODULE += ztimer_msec
  USEMODULE += ztimer_now64
endif

# "ztimer_xtimer_compat" is a wrapper of the xtimer API on ztimer_used
# (it is currently incomplete). Unless doing testing, use "xtimer_on_ztimer".
ifneq (,$(filter ztimer_xtimer_compat,$(USEMODULE)))
  USEMODULE += div
  USEMODULE += ztimer_usec
endif

ifneq (,$(filter ztimer_%,$(USEMODULE)))
  USEMODULE += ztimer_core
  USEMODULE += ztimer_extend
endif

ifneq (,$(filter ztimer_convert_%,$(USEMODULE)))
  USEMODULE += ztimer_convert
endif

ifneq (,$(filter ztimer_periph_timer,$(USEMODULE)))
  FEATURES_REQUIRED += periph_timer
endif

ifneq (,$(filter ztimer_periph_rtc,$(USEMODULE)))
  FEATURES_REQUIRED += periph_rtc
endif

ifneq (,$(filter ztimer_periph_rtt,$(USEMODULE)))
  FEATURES_REQUIRED += periph_rtt
endif

ifneq (,$(filter ztimer_periph_ptp,$(USEMODULE)))
  FEATURES_REQUIRED += periph_ptp_timer
endif

ifneq (,$(filter ztimer_convert_frac,$(USEMODULE)))
  USEMODULE += frac
endif

ifneq (,$(filter ztimer_usec,$(USEMODULE)))
  USEMODULE += ztimer
  USEMODULE += ztimer_periph_timer
endif

ifneq (,$(filter ztimer_msec,$(USEMODULE)))
  USEMODULE += ztimer
  FEATURES_OPTIONAL += periph_rtt
  # HACK: periph_rtt will get used only in the next iteration but an updated
  # state for FEATURES_USED is needed here so include `features_check.inc.mk`
  # here instead.
  # An other option would be to check FEATURES_PROVIDED this would avoid the
  # order of inclusion problem but it would no take into account possible conflicts
  # and is also currently not allowed in the build system.
  # An other alternative would be to delay to the next loop, but this produce a
  # case where another loop is not executed and the conditional not evaluated
  # If these kind of usecases pop up before Kconfig migration is completed
  # then another alternative would be introduce a variable to require an extra
  # loop independent of USEMODULE, FEATURES_REQUIRED and USEPKG
  include $(RIOTMAKE)/features_check.inc.mk
  ifneq (,$(filter periph_rtt,$(FEATURES_USED)))
    USEMODULE += ztimer_periph_rtt
  else
    USEMODULE += ztimer_periph_timer
  endif
endif

ifneq (,$(filter ztimer_sec,$(USEMODULE)))
  USEMODULE += ztimer
  FEATURES_OPTIONAL += periph_rtt
  # HACK: see above
  ifneq (,$(filter periph_rtt,$(FEATURES_USED)))
    USEMODULE += ztimer_periph_rtt
  else
    USEMODULE += ztimer_periph_timer
  endif
endif