PROJECT=rapper
PLATFORM ?= arm-none-eabi
BOARD?=lpc1768
BPATH=boards/$(BOARD)
LDFLAGS=--gc-sections -g -T $(BPATH)/flash.ld
CFLAGS=-W -Wall --std=gnu99 -fgnu89-inline -mcpu=cortex-m3 -mthumb -ffunction-sections -fdata-sections -I$(BPATH) -I. -g
#CFLAGS+=-Os

# objects are separated by space
USB_OBJS=usb/serial.o usb/core.o usb/desc.o usb/hw.o usb/user.o usb/vcom.o usb/cdcuser.o
BOARD_OBJS=$(BPATH)/startup.o $(BPATH)/system.o boards/cortex_m3/core_cm3.o
OBJECTS=main.o $(BOARD_OBJS) $(USB_OBJS)

depend=$(shell sh -c 'b=$$(echo $1|sed -e"s/\\.o$$//g");([ -f $$b.d ] \
	&& sed -e":a;N;$$!ba;s/\\\\\\n//g" $$b.d|grep "^$$(basename $1):"\
	| cut -d: -f2)||echo $$b.c')

all: crc.h crc

$(PROJECT).elf: $(OBJECTS)
	$(PLATFORM)-ld -Map $(PROJECT).map $(LDFLAGS) $(OBJECTS) -o $@

%.bin: %.elf
	$(PLATFORM)-objcopy -O binary $< $*.bin

.SECONDEXPANSION:
%.o: $$(call depend,$$@)
	$(PLATFORM)-gcc -MM $< -MF $(patsubst %.o,%.d,$@) -MP
	$(PLATFORM)-gcc $(CFLAGS) -c $< -o $@

.PHONY: clean gdb crc

clean:
	rm -f $(PROJECT).elf $(OBJECTS) $(OBJECTS:.o=.d) $(PROJECT).map crc.h

gdb:
	$(PLATFORM)-gdb $(PROJECT).elf

crc:	$(PROJECT).bin
	../tools/lpcrc/lpcrc.sh $(PROJECT).bin crc.h

crc.h:	crc.tmpl.h
	cp crc.tmpl.h crc.h