###############################################################################
# Makefile for the project dmm_vga
###############################################################################

## General Flags
PROJECT = dmm_vga
MCU = atmega644p
TARGET = dmm_vga.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 -std=gnu99 -DF_CPU=20000000UL -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,--section-start=.bigalign=0x8000 -Wl,-Map=dmm_vga.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


## Objects that must be built in order to link
OBJECTS = dmm_vga.o framebuffer.o vt100.o font.o keyboard.o uart.o slides.o 

## Objects explicitly added by the user
LINKONLYOBJECTS = 

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

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

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

vt100.o: ../vt100.c
	$(CC) $(INCLUDES) $(CFLAGS) -c  $<

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

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

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

slides.o: ../slides.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}

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


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

