VPATH += :$(HALPATH)/efr32mg21a
VPATH += :$(HALPATH)/silabs_sdk/platform/Device/SiliconLabs/EFR32MG21/Source/GCC
VPATH += :$(HALPATH)/silabs_sdk/platform/Device/SiliconLabs/EFR32MG21/Source
VPATH += :$(HALPATH)/silabs_sdk/platform/emlib/src

SRC += system_efr32mg21.c efr32mg21a_hal.c
ASRC += startup_efr32mg21.S

#SiLabs Emlib stuff
SRC += em_cmu.c em_system.c em_usart.c em_gpio.c em_se.c

EXTRAINCDIRS += $(HALPATH)/efr32mg21a
EXTRAINCDIRS += $(HALPATH)/silabs_sdk/platform/CMSIS/Include
EXTRAINCDIRS += $(HALPATH)/silabs_sdk/platform/emlib/inc
EXTRAINCDIRS += $(HALPATH)/silabs_sdk/platform/Device/SiliconLabs/EFR32MG21/Include

CFLAGS += -DHFXO_FREQ=7372800UL

MCU_FLAGS = -mcpu=cortex-m33

CC = arm-none-eabi-gcc
OBJCOPY = arm-none-eabi-objcopy
OBJDUMP = arm-none-eabi-objdump
SIZE = arm-none-eabi-size
AR = arm-none-eabi-ar rcs
NM = arm-none-eabi-nm

#Output Format = Binary for this target
FORMAT = binary

CFLAGS += -gdwarf-2 -mthumb -fmessage-length=0 -mno-sched-prolog -fno-builtin -ffunction-sections -fdata-sections
CPPFLAGS += $(CFLAGS)
ASFLAGS += $(CFLAGS)

CDEFS += -DEFR32MG21A020F1024IM32=1 -mfpu=fpv5-sp-d16 -mfloat-abi=softfp

LDFLAGS += --specs=nano.specs -T $(HALPATH)/silabs_sdk/platform/Device/SiliconLabs/EFR32MG21/Source/GCC/efr32mg21.ld -Wl,--gc-sections -Wl,--start-group -lgcc -lc -lnosys -Wl,--end-group -lm