USEMODULE += rtt_rtc USEMODULE += ztimer_no_periph_rtt CFLAGS += -DMOCK_RTT_FREQUENCY=32 CFLAGS += -DMOCK_RTT_MAX_VALUE=0xFFFF # mulle always enables periph_rtt. # This clashes with mock_rtt. BOARD_BLACKLIST := mulle # esp32 enables periph_rtc by default. # This clashes with rtt_rtc, FEATURES_BLACKLIST += arch_esp32