# $Id: Makefile,v 1.2 2010/03/23 07:55:23 simimeie Exp $
# Makefile for the ds1820-to-usb project

CC	= avr-gcc
OBJDUMP	= avr-objdump
OBJCOPY = avr-objcopy
AVRDUDE = avrdude
INCDIR	= .

# target mcu (at90s8515, atmega16, atmega8515...)
MCU	= attiny45
# Since avrdude is generally crappy software (I liked uisp a lot better, too
# bad the project is dead :-/), it cannot use the MCU name everybody else
# uses, it has to invent its own name for it. So this defines the same
# MCU as above, but with the name avrdude understands.
AVRDMCU	= t45

# Some more settings
# Clock Frequency of the AVR. Needed for various calculations.
CPUFREQ		= 15000000UL

# Additional defines
# Known defines are:
# -DKISS    enables Keep-It-Simple-Stupid mode, which can only handle one
#           temperature sensor on the bus.
ADDDEFS	= 

SRCS	= usbdrv/usbdrv.c ds1820.c main.c time.c
ASMS	= usbdrv/usbdrvasm.S
PROG	= ds1820tousb

# compiler flags
CFLAGS	= -g -Os -Wall -fno-strict-aliasing -mmcu=$(MCU) $(ADDDEFS)

# linker flags
LDFLAGS = -g -mmcu=$(MCU) -Wl,-Map,$(PROG).map

CFLAGS += -DCPUFREQ=$(CPUFREQ) -DF_CPU=$(CPUFREQ)

OBJS	= $(SRCS:.c=.o) $(ASMS:.S=.o)

all: compile dump text eeprom

compile: $(OBJS)
	$(CC) $(LDFLAGS) -o $(PROG).elf $(OBJS)

dump: compile
	$(OBJDUMP) -h -S $(PROG).elf > $(PROG).lst

hostsoftware: hostsoftware.c
	gcc -o hostsoftware -O2 -Wall -lusb hostsoftware.c

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

%o : %S 
	$(CC) $(CFLAGS) -I$(INCDIR) -c $< -o $@

# Create the flash contents
text: compile
	$(OBJCOPY) -j .text -j .data -O ihex $(PROG).elf $(PROG).hex
	$(OBJCOPY) -j .text -j .data -O srec $(PROG).elf $(PROG).srec
	$(OBJCOPY) -j .text -j .data -O binary $(PROG).elf $(PROG).bin

# Rules for building the .eeprom rom images
eeprom: compile
	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $(PROG).elf $(PROG)_eeprom.hex
	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O srec $(PROG).elf $(PROG)_eeprom.srec
	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O binary $(PROG).elf $(PROG)_eeprom.bin

clean:
	rm -f $(PROG) *~ *.elf *.rom *.bin *.eep *.o usbdrv/*.o *.lst *.map *.srec *.hex

upload: uploadflash uploadeeprom

uploadflash:
	$(AVRDUDE) -c stk500v2 -p $(AVRDMCU) -P /dev/ttyS0 -U flash:w:$(PROG).srec:s

uploadeeprom:
	$(AVRDUDE) -c stk500v2 -p $(AVRDMCU) -P /dev/ttyS0 -U eeprom:w:$(PROG)_eeprom.srec:s

uploadfuses:
	@echo "Sorry, I will not program the fuses for you, since things will"
	@echo "go horribly wrong if you make a mistake there. It is safest to set"
	@echo "them with avrstudio."
	@echo "If you want to use attiny45/85, you will probably want"
	@echo " lfuse=0xff, hfuse=0xdd, efuse=0xff"
	@echo "Command line will be something along the lines of"
	@echo $(AVRDUDE) -c stk500v2 -p $(AVRDMCU) -P /dev/ttyS0 -U lfuse:w:0xff:m
	@echo $(AVRDUDE) -c stk500v2 -p $(AVRDMCU) -P /dev/ttyS0 -U hfuse:w:0xdd:m
	@echo $(AVRDUDE) -c stk500v2 -p $(AVRDMCU) -P /dev/ttyS0 -U efuse:w:0xff:m