CFLAGS_MCU += -mtune=cortex-m4 -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard MPY_CROSS_MCU_ARCH = armv7m MICROPY_HW_CODESIZE ?= 368K MICROPY_VFS_LFS2 ?= 1 MICROPY_VFS_FAT ?= 1 FROZEN_MANIFEST ?= mcu/$(MCU_SERIES_LOWER)/manifest.py SRC_S += shared/runtime/gchelper_thumb2.s SRC_C += \ fatfs_port.c \ drivers/dht/dht.c \