##
##  spreadspace stm8 utils
##
##
##  Copyright (C) 2017 Christian Pointner <equinox@spreadspace.org>
##
##  This file is part of spreadspace stm8 utils.
##
##  spreadspace stm8 utils is free software: you can redistribute it and/or modify
##  it under the terms of the GNU General Public License as published by
##  the Free Software Foundation, either version 3 of the License, or
##  any later version.
##
##  spreadspace stm8 utils is distributed in the hope that it will be useful,
##  but WITHOUT ANY WARRANTY; without even the implied warranty of
##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
##  GNU General Public License for more details.
##
##  You should have received a copy of the GNU General Public License
##  along with spreadspace stm8 utils. If not, see <http://www.gnu.org/licenses/>.
##

ifndef SPREADSTM8_PATH
SPREADSTM8_PATH := ..
endif
include $(SPREADSTM8_PATH)/defines.mk
ifndef MCU
$(error Unknown board: '$(BOARD_TYPE)')
endif

## project-specific objects
SRC := $(OBJ:%.rel=%.c)
DEP := $(SRC:%.c=%.d)

OBJ_LIB := $(LIBS:%=lib-%.rel)
SRC_LIB := $(LIBS:%=$(LIB_DIR)/%.c)
DEP_LIB := $(LIBS:%=lib-%.d)

.PHONY: prepare clean clean-external distclean clean-spl program erase flash reset run

ELFFILE := $(NAME).elf
HEXFILE := $(NAME).hex

all: prepare $(HEXFILE)


## external Libs
LDFLAGS += -L./

ifdef SPL_PATH
CFLAGS += -D$(SPL_MCU)
ifdef F_XTAL
  CFLAGS += -DHSE_VALUE="((uint32_t)$(F_XTAL))"
endif
CFLAGS += -I./
CFLAGS += -I$(SPL_PATH)/Libraries/STM8S_StdPeriph_Driver/inc
endif

prepare: $(EXTERNAL_LIBS:%=build-%)
clean-external: $(EXTERNAL_LIBS:%=clean-%)

export

build-spl: spl.lib

spl.lib: Makefile
	@echo ""
	@echo "****************************************************"
	@echo "* building external STM8S StdPeriph lib ($(SPL_PATH))"
	@echo ""
	make -f $(SPREADSTM8_PATH)/spl.mk spl.lib
	make -f $(SPREADSTM8_PATH)/spl.mk clean
	@echo ""
	@echo "****************************************************"

clean-spl:
	@echo ""
	@echo "****************************************************"
	@echo "cleaning external STM8S StdPeriph lib ($(SPL_PATH))"
	@echo ""
	make -f $(SPREADSTM8_PATH)/spl.mk clean
	rm -f spl.lib
	@echo ""
	@echo "****************************************************"



## project-specific objects
%.d: %.c Makefile
	@set -e; rm -f $@; \
  $(CC) -MM $(CFLAGS) -E $< > $@.$$$$; \
  sed 's,\($*\)\.rel[ :]*,\1.rel $@ : ,g' < $@.$$$$ > $@; \
  rm -f $@.$$$$; echo '(re)building $@'

lib-%.d: $(LIB_DIR)/%.c Makefile
	@set -e; rm -f $@; \
  $(CC) -MM $(CFLAGS) -E $< > $@.$$$$; \
  sed 's,\($*\)\.rel[ :]*,lib-\1.rel $@ : ,g' < $@.$$$$ > $@; \
  rm -f $@.$$$$; echo '(re)building $@'


ifneq ($(MAKECMDGOALS),distclean)
-include $(DEP)
-include $(DEP_LIB)
endif

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

lib-%.rel: $(LIB_DIR)/%.c Makefile
	$(CC) $(CFLAGS) -c $< -o $@

$(HEXFILE): $(OBJ_LIB) $(EXTERNAL_LIBS:%=%.lib) $(OBJ)
	$(CC) $(LDFLAGS) --out-fmt-ihx $(OBJ) $(OBJ_LIB) $(EXTERNAL_LIBS:%=-l%) -o $@
	@echo ""


clean:
	rm -f *.cdb
	rm -f *.d
	rm -f *.d.*
	rm -f *.rel
	rm -f *.rst
	rm -f *.lst
	rm -f *.sym
	rm -f *.asm
	rm -f *.lk
	rm -f *.map
	rm -f $(HEXFILE)

distclean: clean-external clean

### stlink
define stlink/erase
endef

define stlink/flash
	$(stm8flash) -c stlink -p $(MCU) -w $1
endef

define stlink/run
endef

### stlinkv2
define stlinkv2/erase
endef

define stlinkv2/flash
	$(stm8flash) -c stlinkv2 -p $(MCU) -w $1
endef

define stlinkv2/run
endef

### stm8gal
define stm8gal/erase
endef

define stm8gal/flash
	$(stm8gal) -p $(UPLOAD_PORT) -b $(UPLOAD_RATE) -w $1 -Q
endef

define stm8gal/run
endef

### Program Targets
program: reset erase flash run

erase:
	$(call $(PROG)/$@,)

flash: $(HEXFILE)
	$(call $(PROG)/$@,$(HEXFILE))

run:
	$(call $(PROG)/$@,)

reset:
	@if [ -n "$(RESET_FUNC)" ]; then    \
    if [ -x "$(RESET_FUNC)" ]; then   \
      eval $(RESET_FUNC) $(RESET_PARAM);   \
    else                              \
      echo "WARNING: ignoring non-existing or non-executable reset script"; \
    fi                                \
  fi