MKDIR_P := mkdir -p
CP := cp
MV := mv
CC := avr-gcc
CCC := avr-g++
RM_RF = rm -rf
OCPY := avr-objcopy
AVRDUDE := avrdude
PORT := /dev/ttyACM0
#PORT := usb
#BOARD := atmega328p
BOARD := atmega2560
#PROGRAMMER := arduino
PROGRAMMER := usbasp
#PROGBOARD := m328p
PROGBOARD := m2560
BAUD_RATE_PROG := 115200
FLASH_CMD := $(AVRDUDE) -b $(BAUD_RATE_PROG) -p $(PROGBOARD) -D -P $(PORT) -c $(PROGRAMMER)
AVRSIZE := avr-size
AVRSIZE_FLAGS := -C --mcu=$(PROGBOARD)

# directories
CWD := $(realpath .)
BINDIR := $(CWD)/bin
BUILDDIR := $(CWD)/build
SRCDIR := $(CWD)/src
INCLUDEDIR := $(CWD)/include

# flas
CFLAGS := -mmcu=$(BOARD) -Os -I$(INCLUDEDIR) -Wall -Wextra
LDFLAGS := -mmcu=$(BOARD)

# target files
DIRS_TARGET := $(BINDIR) $(BUILDDIR)
TARGET := $(BINDIR)/mc.hex
TARGET_ELF := $(BINDIR)/mc.elf
SRCFILES := $(wildcard $(SRCDIR)/*.c)
OBJFILES := $(patsubst $(SRCDIR)/%.c,$(BUILDDIR)/%.o,$(SRCFILES))

# fancy targets
all: directories $(TARGET)

directories: $(DIRS_TARGET)

# less fancy targets

$(DIRS_TARGET):
	$(MKDIR_P) $@

$(TARGET) : $(TARGET_ELF)
	$(OCPY) -O ihex -j .text -j .data $^ $@

$(TARGET_ELF): $(OBJFILES)
	$(CC) $(LDFLAGS) -o $@  $^
	 $(AVRSIZE) $(AVRSIZE_FLAGS) $@
 
$(BUILDDIR)/%.o: $(SRCDIR)/%.c
	$(CC) $(CFLAGS) -c -o $@ $<                              

flash: $(TARGET)
	# For atmega 2560
	$(FLASH_CMD) -e  -U hfuse:w:0xD9:m -U lfuse:w:0xDF:m -U efuse:w:0xFF:m -U flash:w:$^:i -U efuse:w:0xfa:m
	# For atmega 328p:
	#$(FLASH_CMD) -e -U hfuse:w:0xD9:m  -U efuse:w:0xFF:m -U lfuse:w:0xDF:m -U flash:w:$^:i -U efuse:w:0xfd:m
	# If unknown or no fuse bits available over programmer
	#$(FLASH_CMD) -U flash:w:$^:i 
	$(FLASH_CMD) -U flash:v:$^:i

clean:                                                                          
	$(RM_RF) $(DIRS_TARGET)