MCU_SERIES = m0 MCU_VARIANT = nrf51 MCU_SUB_VARIANT = nrf51822 SOFTDEV_VERSION = 8.0.0 LD_FILE = boards/nrf51x22_256k_16k_s110_$(SOFTDEV_VERSION).ld FLASHER = pyocd CFLAGS += -DBLUETOOTH_LFCLK_RC