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##
##  spreadspace avr utils
##
##
##  Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
##
##  This file is part of spreadspace avr utils.
##
##  spreadspace avr 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 avr 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 avr utils. If not, see <http://www.gnu.org/licenses/>.
##

include ../defines.mk

## project-specific objects
SRC := $(OBJ:%.o=%.c)
DEP := $(SRC:%.c=%.d)
OBJ_LIB := $(LIBS:%=lib-%.o)
SRC_LIB := $(LIBS:%=$(LIB_DIR)/%.c)
DEP_LIB := $(LIBS:%=lib-%.d)

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

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

all: prepare $(HEXFILE)


## external Libs
LDFLAGS += -L./

ifdef LUFA_PATH
CFLAGS += -I$(LUFA_PATH)
CFLAGS += -DF_USB=$(F_USB)UL
CFLAGS += -DBOARD=BOARD_$(LUFA_BOARD)
CFLAGS += $(LUFA_OPTS)
endif

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

export
build-lufa: liblufa.a

liblufa.a:
	@echo "building external LUFA lib ($(LUFA_PATH))"
	make -f ../lufa.mk liblufa.a
	make -f ../lufa.mk clean

clean-lufa:
	@echo "cleaning external LUFA lib ($(LUFA_PATH))"
	make -f ../lufa.mk clean
	rm -f liblufa.a


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

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

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

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

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

$(ELFFILE): $(OBJ) $(OBJ_LIB) $(EXTERNAL_LIBS:%=lib%.a)
	$(CC) $(LDFLAGS) $(OBJ) $(OBJ_LIB) $(EXTERNAL_LIBS:%=-l%) -o $@

$(HEXFILE): $(ELFFILE)
	$(OBJCOPY) -O ihex -R .eeprom -R .fuse -R .lock -R .signature $< $@

clean: $(CLEAN_TARGETS)
	rm -f *.o
	rm -f *.d
	rm -f *.d.*
	rm -f $(ELFFILE)
	rm -f $(HEXFILE)

distclean: clean-external clean

### DFU-Programmer
define DFU/erase
	$(DFU) $(MCU) erase || true
endef

define DFU/flash
	$(DFU) $(MCU) flash $1
endef

define DFU/run
	$(DFU) $(MCU) start
endef

### teensy-loader
define teensy/erase
endef

define teensy/flash
	$(teensy) -mmcu=$(MCU) -w -v $1
endef

define teensy/run
endef

### avrdude
define avrdude/erase
endef

define avrdude/flash
	$(avrdude) -V -F -p $(MCU) -P $(AVRDUDE_PORT) -c $(PROG_TYPE) -b $(UPLOAD_RATE) -U flash:w:$1
endef

define avrdude/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