# Adapted from Makefile.stm32f103

# Default to STM32F107VCT7
ifndef SUBTARGET
$(warning SUBTARGET not defined, defaulting to STM32F107VCT)
SUBTARGET = 7VCT
endif

### libopencm3 specifics
OPENCM3_BASE=
OPENCM3_FAMILY=STM32F1
OPENCM3_LIB=opencm3_stm32f1

ifndef OPENCM3_BASE
$(error OPENCM3_BASE not defined. Please set definition to root of libopencm3)
endif
### Code common for all ARM CPUs

CONTIKI_CPU_ARM=$(CONTIKI)/cpu/arm
CONTIKI_CPU_ARM_COMMON=$(CONTIKI_CPU_ARM)/common

### Define the CPU directory
CONTIKI_CPU=$(CONTIKI_CPU_ARM)/stm32f1x_cl

### Define the source files we have in the STM32F1x_cl port

CONTIKI_CPU_DIRS = .

STM32F1x = clock.c util.c uip-log.c symbols.c

#Using the opencm3 usb library for now
#include $(CONTIKI_CPU_ARM_COMMON)/usb/Makefile.usb

#No SD support for now...This is a TODO
#include $(CONTIKI_CPU_ARM_COMMON)/SD-card/Makefile.sdcard

TARGETLIBS = random.c

CONTIKI_TARGET_SOURCEFILES += $(STM32F1x) $(TARGETLIBS)

CONTIKI_SOURCEFILES        += $(CONTIKI_TARGET_SOURCEFILES)

PREFIX = arm-none-eabi

### Compiler definitions
CC       = $(PREFIX)-gcc
LD       = $(PREFIX)-ld
AS       = $(PREFIX)-as
AR       = $(PREFIX)-ar
NM       = $(PREFIX)-nm
OBJCOPY  = $(PREFIX)-objcopy
STRIP    = $(PREFIX)-strip

XSLTPROC=xsltproc

PROJECT_OBJECTFILES += ${addprefix $(OBJECTDIR)/,$(CONTIKI_TARGET_MAIN:.c=.o)}

LINKERSCRIPT = $(CONTIKI_CPU)/STM32F10$(SUBTARGET).ld

# DFU-UTIL program upload
DFU_UTIL=dfu-util
DFU_UTIL_OFFSET=0x08000000

# Use dfu-util by default
PROG=dfuutil

ARCH_FLAGS= -mcpu=cortex-m3 -mthumb

#CONTIKI_CFLAGS = -DWITH_UIP -DWITH_ASCII

CFLAGSNO = -I. -I$(CONTIKI)/core -I$(CONTIKI_CPU) \
	   -I$(OPENCM3_BASE)/include \
           -I$(CONTIKI)/platform/$(TARGET) \
           ${addprefix -I,$(APPDIRS)} \
           -DMCK=$(MCK) -DSUBTARGET=$(SUBTARGET) \
           -Wall $(ARCH_FLAGS) -g -DSTM32F1 -MD

CFLAGS  += $(CONTIKI_CFLAGS) $(CFLAGSNO) -Os

LDFLAGS += -L $(CONTIKI_CPU) -T $(LINKERSCRIPT) \
	   -Wl,--start-group -lc -lgcc -Wl,--end-group\
	   -nostartfiles -Wl,--gc-sections $(ARCH_FLAGS)

EXTERN_LIBS += -L $(OPENCM3_BASE)/lib -l$(OPENCM3_LIB)

CDEPFLAGS = $(CFLAGS) -D __MAKING_DEPS__

### Setup directory search path for source files

CUSTOM_RULE_C_TO_OBJECTDIR_O=yes
CUSTOM_RULE_C_TO_O=yes

%.o: %.c
	$(CC) $(CFLAGS) $< -c

$(OBJECTDIR)/%.o: %.c
	$(CC) $(CFLAGS) -c $< -o $@


CUSTOM_RULE_S_TO_OBJECTDIR_O = yes
%.o: %.S
	$(CC) $(CFLAGS) $< -c

$(OBJECTDIR)/%.o: %.S
	$(CC) $(CFLAGS) $< -c  -o $@


CUSTOM_RULE_C_TO_CO=yes

%.co: %.c
	$(CC) $(CFLAGS) $< -c -o $@

CUSTOM_RULE_C_TO_CE=yes

%.ce: %.o
	$(LD) $(LDFLAGS) --relocatable -T $(CONTIKI_CPU)/merge-rodata.ld $< -o $@
	$(STRIP) -K _init -K _fini --strip-unneeded -g -x $@

CUSTOM_RULE_LINK=yes

%-stripped.o: %.c
	$(CC) $(CFLAGS) -c $< -o $@
	$(STRIP) --strip-unneeded -g -x $@

%-stripped.o: %.o
	$(STRIP) --strip-unneeded -g -x -o $@ $<

%.o: ${CONTIKI_TARGET}/loader/%.S
	$(AS) -o $(notdir $(<:.S=.o)) $<

%-nosyms.$(TARGET): %.co $(PROJECT_OBJECTFILES) contiki-$(TARGET).a # $(OBJECTDIR)/empty-symbols.o
	$(CC) $(LDFLAGS) $(CFLAGS) -nostartfiles -o $@ $(filter-out %.a,$^) $(filter %.a,$^) -lc $(filter %.a,$^) $(EXTERN_LIBS)


%.ihex: %.$(TARGET)
	$(OBJCOPY) $^ -O ihex $@

%.bin: %.$(TARGET)
	$(OBJCOPY) -O binary $< $@
 
.PHONY: symbols.c
ifdef CORE
%.$(TARGET): %.co $(PROJECT_OBJECTFILES) contiki-$(TARGET).a $(STARTUP) $(OBJECTDIR)/symbols.o
	$(CC) $(LDFLAGS) $(CFLAGS) -nostartfiles -o $@ $(filter-out %.a,$^) $(filter %.a,$^) -lc $(filter %.a,$^)

symbols.c: $(CORE)
	$(NM) $< | awk -f $(CONTIKI_CPU)/builtins.awk -f ../../tools/mknmlist > symbols.c

else
%.$(TARGET): %-nosyms.$(TARGET)
	ln -sf $< $@
endif

empty-symbols.c:
	cp ${CONTIKI}/tools/empty-symbols.c symbols.c
	cp ${CONTIKI}/tools/empty-symbols.h symbols.h

# Don't use core/loader/elfloader.c, use elfloader-otf.c instead
$(OBJECTDIR)/elfloader.o:
	echo -n >$@

clean: clean_cpu

.PHONY: stm32test_clean

clean_cpu:
	-rm -rf $(BUILTSRCDIR)

.PRECIOUS: %-nosyms.$(TARGET)