CPU = cortex-m4
MCU = MK20DX256
MK20DX256 = ../mk20dx256
# Change this to suit
TARGET_ARCH = -mcpu=$(CPU) -mthumb

AS = arm-none-eabi-as
CC = arm-none-eabi-gcc
OBJCOPY = arm-none-eabi-objcopy

WARNINGS = -Wpointer-arith -Wcast-align -Wformat=2 \
	   -Wsuggest-attribute=format -Wall \
	   -Wextra -Wpedantic -Winit-self -Wshadow -Wcast-qual \
	   -Wstrict-prototypes -Wmissing-prototypes
CPPFLAGS = -Ilib
CFLAGS = -std=c11 $(WARNINGS) -O2 -flto -MMD -MP -ffreestanding -nostdlib
LDFLAGS = -T layout.ld -O2 -flto -ffreestanding -nostdlib
ASFLAGS = $(TARGET_ARCH)

OBJ := crt0.o vectors.o flashconf.o setup.o fmk.o lib/le.o usb/usb.o \
	usb/endpt0.o usb/endpt1.o uart.o

include $(MK20DX256)/mk20dx256.mk
CPPFLAGS += $(mk20dx256_CPPFLAGS)

%.bin: %
	$(OBJCOPY) -O binary $< $@

debug: all
debug: CFLAGS += -Og -ggdb
debug: LDFLAGS += -Og -ggdb

all: fmk.bin
fmk: $(OBJ)

flash: fmk.bin
	hktool -f $< -r $(MCU)

clean:
	$(RM) $(OBJ) $(OBJ:.o=.d) fmk fmk.bin

-include $(OBJ:.o=.d)

.PHONY: all flash clean