##
##  spreadspace teensy utils
##
##
##  Copyright (C) 2011 Christian Pointner <equinox@spreadspace.org>
##                         
##  This file is part of spreadspace teensy utils.
##
##  spreadspace teensy 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 teensy 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 teensy utils. If not, see <http://www.gnu.org/licenses/>.
##

ifeq ($(BOARD_TYPE),teensy1)
MCU := at90usb162
F_CPU := 16000000
endif
ifeq ($(BOARD_TYPE),teensy2)
MCU := atmega32u4
F_CPU := 16000000
endif
ifeq ($(BOARD_TYPE),teensypp1)
MCU := at90usb646
F_CPU := 16000000
endif
ifeq ($(BOARD_TYPE),teensypp2)
MCU := at90usb1286
F_CPU := 16000000
endif
FORMAT := ihex

CC = avr-gcc
OBJCOPY = avr-objcopy
DFU = dfu-programmer

## Options common to compile, link and assembly rules
COMMON = -mmcu=$(MCU)

## Compile options common for all C compilation units.
CFLAGS = $(COMMON) 
CFLAGS += -O2
CFLAGS += -funsigned-char
CFLAGS += -funsigned-bitfields
CFLAGS += -ffunction-sections
CFLAGS += -fpack-struct
CFLAGS += -fshort-enums
CFLAGS += -Wall
CFLAGS += -Wstrict-prototypes
CFLAGS += -DF_CPU=$(F_CPU)UL

## Linker flags
LDFLAGS = $(COMMON)
LDFLAGS += 

SRC := $(OBJ:%.o=%.c)

.PHONY: clean erase program reset run

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

all: $(HEXFILE)

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

ifneq ($(MAKECMDGOALS),distclean)
-include $(SRC:%.c=%.d)
endif

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

$(ELFFILE): $(OBJ)
	$(CC) $(OBJ) -o $@ $(LDFLAGS)

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

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

erase:
	$(DFU) $(MCU) erase || true

program: $(HEXFILE) erase
	$(DFU) $(MCU) flash $<

reset:
	$(DFU) $(MCU) reset

run:
	$(DFU) $(MCU) start