###############################################################################
# Makefile for the serial_lcd C version for GCC

## General Flags
PROJECT = serial_lcd
MCU = attiny2313
TARGET = $(PROJECT).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 += -DF_CPU=14745600UL -Os

## Assembly specific flags
ASMFLAGS = $(COMMON) -D__ASSEMBLER__
ASMFLAGS += -DF_CPU=14745600UL -Os
ASMFLAGS += -Wa,-gstabs

## Linker flags
LDFLAGS = $(COMMON)
LDFLAGS +=  -Wl,-Map=$(PROJECT).map,--cref


## 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 = $(PROJECT).o 

## Objects explicitly added by the user
LINKONLYOBJECTS = 

## Build
all: $(PROJECT).hex $(PROJECT).eep $(PROJECT).lss size 

## Compile
$(PROJECT).o: ../$(PROJECT).S
	$(CC) $(ASMFLAGS) -c $< -o $(PROJECT).o

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

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

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

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

.PHONY: size
size: ${TARGET}
	@echo $(TARGET) size
	@avr-size -C --mcu=${MCU} ${TARGET}

## Clean target
.PHONY: distclean
distclean: clean
	@rm -rf $(PROJECT).hex $(PROJECT).lss $(PROJECT).map $(PROJECT).lst 

.PHONY: clean
clean:
	@rm -rf $(OBJECTS) $(TARGET) $(PROJECT).eep