###############################################################################
# Makefile for the project AES_Bootloader
###############################################################################

## General Flags
PROJECT = AES_Bootloader
#MCU = atmega644p
MCU = atmega32
TARGET = AES_Bootloader.elf
CC = avr-gcc.exe

BOOTINTVEC=no

#/* Select Boot Size in Words (select one, comment out the others) */
## NO! BOOTSIZE=128
## NO! BOOTSIZE=256
## BOOTSIZE=512
## BOOTSIZE=1024
BOOTSIZE=2048


##
ifeq ($(MCU), atmega32)
BFD_MACH=avr5
ifeq ($(BOOTSIZE), 256)
	MT_BOOTLOADER_ADDRESS = 0x7E00
endif
ifeq ($(BOOTSIZE), 512)
	MT_BOOTLOADER_ADDRESS = 0x7C00
endif
ifeq ($(BOOTSIZE), 1024)
	MT_BOOTLOADER_ADDRESS = 0x7800
endif
ifeq ($(BOOTSIZE), 2048)
	MT_BOOTLOADER_ADDRESS = 0x7000
endif
endif

##
ifeq ($(MCU), atmega644p)
BFD_MACH=avr5
ifeq ($(BOOTSIZE), 256)
	MT_BOOTLOADER_ADDRESS = 0xFC00
endif
ifeq ($(BOOTSIZE), 512)
	MT_BOOTLOADER_ADDRESS = 0xF800
endif
ifeq ($(BOOTSIZE), 1024)
	MT_BOOTLOADER_ADDRESS = 0xF000
endif
ifeq ($(BOOTSIZE), 2048)
	MT_BOOTLOADER_ADDRESS = 0xE000
endif
endif


## 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                    -DF_CPU=16000000UL -Os -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,-Map=AES_Bootloader.map

################## BOOTLOADER ######################
# MT_BOOTLOADER_ADDRESS (=Start of Boot Loader section
# in bytes - not words) as defined above.
LDFLAGS += -Wl,--section-start=.text=$(MT_BOOTLOADER_ADDRESS)

# check if linker-scripts without interrupt-vectors should
# be used and set linker-option, announce to C-code by define
ifeq ($(BOOTINTVEC), no)
LDFLAGS += -T./ldscripts/$(BFD_MACH).x
CFLAGS  += -DBOOTLOADERHASNOVECTORS
endif



## 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 = aes.o bootldr.o loader.o usart.o spm.o crc.o 

## Objects explicitly added by the user
LINKONLYOBJECTS = 

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

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

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

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

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

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

spm.o: ../spm.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) AES_Bootloader.elf dep/* AES_Bootloader.hex AES_Bootloader.eep AES_Bootloader.lss AES_Bootloader.map


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