BINARY=test
OBJS=test.o util-debug.o ds18b20.o

OPENCM3_DIR=/home/mj/stm/libopencm3
DEVICE=stm32f103x8

all: $(BINARY).elf $(BINARY).bin

flash: all
	../bin/st-flash write $(BINARY).bin 0x8000000

reset: all
	../bin/st-flash reset

ifneq ($(V),1)
Q		:= @
NULL		:= 2>/dev/null
endif

include $(OPENCM3_DIR)/mk/genlink-config.mk

PREFIX		?= arm-none-eabi

CC		:= $(PREFIX)-gcc
CXX		:= $(PREFIX)-g++
LD		:= $(PREFIX)-gcc
AR		:= $(PREFIX)-ar
AS		:= $(PREFIX)-as
OBJCOPY		:= $(PREFIX)-objcopy
OBJDUMP		:= $(PREFIX)-objdump
GDB		:= $(PREFIX)-gdb
OPT		:= -Os
DEBUG		:= -ggdb3
CSTD		?= -std=c99

TGT_CFLAGS	+= $(OPT) $(CSTD) $(DEBUG)
TGT_CFLAGS	+= $(ARCH_FLAGS)
TGT_CFLAGS	+= -Wall -Wextra -Wshadow -Wimplicit-function-declaration
TGT_CFLAGS	+= -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes
TGT_CFLAGS	+= -fno-common -ffunction-sections -fdata-sections

TGT_CPPFLAGS	+= -MD

TGT_LDFLAGS	+= --static -nostartfiles
TGT_LDFLAGS	+= -T$(LDSCRIPT)
TGT_LDFLAGS	+= $(ARCH_FLAGS) $(DEBUG)
TGT_LDFLAGS	+= -Wl,-Map=$(*).map -Wl,--cref
TGT_LDFLAGS	+= -Wl,--gc-sections
ifeq ($(V),99)
TGT_LDFLAGS	+= -Wl,--print-gc-sections
endif

LDLIBS		+= -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group

include $(OPENCM3_DIR)/mk/genlink-rules.mk

%.bin: %.elf
	@printf "  OBJCOPY $(*).bin\n"
	$(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin

%.elf: $(OBJS) $(LDSCRIPT)
	@printf "  LD      $(*).elf\n"
	$(Q)$(LD) $(TGT_LDFLAGS) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $*.elf

%.o: %.c
	@printf "  CC      $(*).c\n"
	$(Q)$(CC) $(TGT_CFLAGS) $(CFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $*.o -c $*.c

.PHONY: clean
clean:
	@printf "  CLEAN\n"
	$(Q)rm -f *.elf *.bin *.o *.d *.map $(LDSCRIPT)

%.stlink-flash: %.bin
	@printf "  FLASH  $<\n"
	$(STFLASH) write $(*).bin 0x8000000

.SECONDEXPANSION:
.SECONDARY:

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