###############################################################################
# Makefile for the project eclcpu
###############################################################################

## General Flags
PROJECT = eclcpu
MCU = atmega2560
TARGET = ld8kdemo.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 -std=gnu99      -gdwarf-2                                                                                                                                                                                                                                                                                                                                                  -DF_CPU=16000000UL -O0 -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
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 += -Wl,--script=morepgmavr6.x -v  -Wl,-section-start=.data=0x802200,--defsym=__heap_end=0x80ffff -Wl,-Map=ld8kdemo.map


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

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


## Include Directories
INCLUDES = -I"..\include" -I"..\." 

## Library Directories
LIBDIRS = -L"..\." 

## Objects that must be built in order to link
OBJECTS = xram.o lddemo.o statemachine.o strncpy_PF.o 

## Objects explicitly added by the user
LINKONLYOBJECTS = 

## Build
all: $(TARGET) ld8kdemo.hex ld8kdemo.eep ld8kdemo.lss size

## Compile
xram.o: ../lib/xram.s
	$(CC) $(INCLUDES) $(ASMFLAGS) -c  $<

strncpy_PF.o: ../morepgmspace/strncpy_PF.S
	$(CC) $(INCLUDES) $(ASMFLAGS) -c  $<

lddemo.o: ../lddemo.c
	$(CC) $(INCLUDES) $(CFLAGS) -c  $<

statemachine.o: ../lib/statemachine.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: ${TARGET}
	@echo
	@avr-size -C --mcu=${MCU} ${TARGET}

## Clean target
.PHONY: clean
clean:
	-rm -rf $(OBJECTS) ld8kdemo.elf dep/* ld8kdemo.hex ld8kdemo.eep ld8kdemo.lss ld8kdemo.map


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