###############################################################################
# Makefile for the project shifter
###############################################################################

## General Flags
PROJECT = shifter
MCU = attiny2313
TARGET = shifter.elf
CC = avr-gcc

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

## Compile options common for all C compilation units.
CFLAGS = $(COMMON)
CFLAGS += -Wall -gdwarf-2 -O2
CFLAGS += -MD -MP -MT $(*F).o -MF dep/$(@F).d 

## Assembly specific flags
ASMFLAGS = $(COMMON)
ASMFLAGS += $(CFLAGS)
ASMFLAGS += -x assembler-with-cpp -Wa,-gdwarf2

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


## Intel Hex file production flags
HEX_FLASH_FLAGS = -R .eeprom

HEX_EEPROM_FLAGS = -j .eeprom
HEX_EEPROM_FLAGS += --set-section-flags=.eeprom="alloc,load"
HEX_EEPROM_FLAGS += --change-section-lma .eeprom=0 --no-change-warnings


## Objects that must be built in order to link
OBJECTS = shifter.o 

## Objects explicitly added by the user
LINKONLYOBJECTS = 

## Build
all: $(TARGET) shifter.hex shifter.eep size

## Compile
shifter.o: shifter.c
	$(CC) $(INCLUDES) $(CFLAGS) -c  $<

##Link
$(TARGET): $(OBJECTS)
	 $(CC) $(LDFLAGS) $(OBJECTS) $(LINKONLYOBJECTS) $(LIBDIRS) $(LIBS) -o $(TARGET)

%.hex: $(TARGET)
	avr-objcopy -O ihex $(HEX_FLASH_FLAGS)  $< $@

%.eep: $(TARGET)
	-avr-objcopy $(HEX_EEPROM_FLAGS) -O ihex $< $@ || exit 0

%.lss: $(TARGET)
	avr-objdump -h -S $< > $@

size: ${TARGET}
	@echo
	@avr-size ${TARGET}

program: ${TARGET}
	avrdude -vv -e -B 32 -c stk500v2 -p t2313 -P /dev/cuaU0 -e -Uflash:w:shifter.hex:i

fuse:
	avrdude -v -v -B 32 -c stk500v2 -p t2313 -P /dev/cuaU0 -U lfuse:w:0xe6:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m	

## Clean target
.PHONY: clean
clean:
	-rm -rf $(OBJECTS) shifter.elf dep/* shifter.hex shifter.eep

## Other dependencies
-include $(shell mkdir dep 2>/dev/null) $(wildcard dep/*)

