# attiny25 makefile

MCU = attiny25
DEVICE = t25
F_CPU = 8000000UL
BAUD = 57600

PROGRAMMER_TYPE = usbasp

CC = avr-gcc
GDB = avr-gdb
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
AVRSIZE = avr-size
AVRDUDE = avrdude
SIMAVR	= simavr

CPPFLAGS = -DF_CPU=$(F_CPU) -DBAUD=$(BAUD) -I.
CFLAGS = -Os -g -Wall
CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums

LDFLAGS = -Wl,-Map,hbc.map
TARGET_ARCH = -mmcu=$(MCU)

DEPS =

ODIR = obj
_OBJ = hbc.o
OBJ = $(patsubst %, $(ODIR)/%,$(_OBJ))

$(ODIR)/%.o: %.c $(DEPS)
	@mkdir -p $(@D)
	$(CC) -c $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) $< -o $@

%.elf: $(OBJ)
	$(CC) $(CFLAGS) $(LDFLAGS) $(TARGET_ARCH) $^ -o $@

# TODO: add fuse section with .j .fuse
%.hex: %.elf
	$(OBJCOPY) -j .text -j .data -O ihex $< $@

#
# for binary output 
#
#%.bin: %.elf
#	$(OBJCOPY) -j .text -j .data -O binary $< $@

all: hbc.hex

.PHONY: clean

clean: 
	rm -rf $(ODIR)/*.o *.hex *.elf *.map

check-dev: 
	$(AVRDUDE) -p $(DEVICE) -c $(PROGRAMMER_TYPE) -b $(BAUD)

flash:
	$(AVRDUDE) -p $(DEVICE) -c $(PROGRAMMER_TYPE) -b $(BAUD) -U flash:w:hbc.hex:i

read-flash-bin:	
	$(AVRDUDE) -p $(DEVICE) -c $(PROGRAMMER_TYPE) -b $(BAUD) -P /dev/ttyUSB0 -U flash:r:flash.bin:r

# simulator runs on localhost:1234
# load .elf file with avr-sim hex.elf
# and start debugging 
sim:
	$(SIMAVR) -f $(F_CPU) -m $(MCU) -g -t hbc.hex

gdb:
	$(GDB) -x gdb-commands.txt hbc.elf