PREFIX ?= arm-none-eabi

LDSCRIPT = support/stm32f0-discovery.ld

CFLAGS += -Os
LDFLAGS += -Os

CFLAGS += -fno-common --function-sections -fdata-sections
LDFLAGS += -static -nostartfiles
LDFLAGS += -Wl,--gc-sections
LDFLAGS += -T ${LDSCRIPT}
LIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group

# Set up libopencm3.
OPENCM3_DIR ?= libopencm3
OPENCM3_LIBNAME = opencm3_stm32f0
CFLAGS += -I$(OPENCM3_DIR)/include
CFLAGS += -DSTM32F0 -msoft-float -mthumb -mcpu=cortex-m0
LDFLAGS += -L$(OPENCM3_DIR)/lib
LIBS += -l$(OPENCM3_LIBNAME)

STLINK_PORT ?= :4242

obj-y += source/core/spi.o
obj-y += source/drivers/spi_flash.o
obj-y += source/drivers/stm32f0_spi.o
obj-y += source/drivers/usart_console.o

$(OPENCM3_DIR)/lib/lib$(OPENCM3_LIBNAME).a:
	@if [ ! -e libopencm3/.git ]; then \
		git submodule init; \
		git submodule update; \
	fi
	@$(MAKE) -C $(OPENCM3_DIR)

$(BUILD)/tbm: $(OPENCM3_DIR)/lib/lib$(OPENCM3_LIBNAME).a

run: $(BUILD)/tbm
	@echo "GDB $<"
	@$(GDB) --batch \
		-ex 'target extended-remote $(STLINK_PORT)' \
		-x flash.scr \
		$<

.PHONY: run