# https://github.com/jkent/caterina-promicro

## === CPU settings ===
MCU = atmega32u4
F_CPU = 16000000
ARCH = AVR8
TARGET = Target

# Input clock frequency.
#     This will define a symbol, F_USB, in all source code files equal to the
#     input clock frequency (before any prescaling is performed) in Hz. This value may
#     differ from F_CPU if prescaling is used on the latter, and is required as the
#     raw input clock is fed directly to the PLL sections of the AVR for high speed
#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
#     at the end, this will be done automatically to create a 32-bit value in your
#     source code.
#
#     If no clock division is performed on the input clock inside the AVR (via the
#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
F_USB = $(F_CPU)



## === Source files ===
# Main C file

APP = app
SRC_DIR=src
INC_DIR=src
OBJ_DIR=obj
BIN_DIR=bin



# LUFA library compile-time options and predefined tokens
LUFA_OPTS  = -D USB_DEVICE_ONLY
LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR=0
LUFA_OPTS += -D ORDERED_EP_CONFIG
LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
LUFA_OPTS += -D FIXED_NUM_CONFIGURATIONS=1
LUFA_OPTS += -D USE_RAM_DESCRIPTORS
LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
LUFA_OPTS += -D NO_INTERNAL_SERIAL
LUFA_OPTS += -D NO_DEVICE_SELF_POWER
LUFA_OPTS += -D NO_DEVICE_REMOTE_WAKEUP
LUFA_OPTS += -D NO_SOF_EVENTS
LUFA_OPTS += -D F_USB=$(F_USB)UL

#LUFA_OPTS += -D NO_BLOCK_SUPPORT
#LUFA_OPTS += -D NO_EEPROM_BYTE_SUPPORT
#LUFA_OPTS += -D NO_FLASH_BYTE_SUPPORT
LUFA_OPTS += -D NO_LOCK_BYTE_WRITE_SUPPORT

LUFA_PATH = src/lufa-LUFA-210130/LUFA

include $(LUFA_PATH)/Build/lufa_core.mk
include $(LUFA_PATH)/Build/lufa_sources.mk
include $(LUFA_PATH)/Build/lufa_build.mk
#include $(LUFA_PATH)/Build/lufa_cppcheck.mk
#include $(LUFA_PATH)/Build/lufa_doxygen.mk
#include $(LUFA_PATH)/Build/lufa_dfu.mk
#include $(LUFA_PATH)/Build/lufa_hid.mk
#include $(LUFA_PATH)/Build/lufa_avrdude.mk
#include $(LUFA_PATH)/Build/lufa_atprogram.mk

## === Programmer ===
#PROGRAMMER_TYPE = arduino
PROGRAMMER_TYPE = avr109
PROGRAMMER_ARGS = -P /dev/ttyACM0

# USB vendor ID (VID)
# SparkFun
VID = 0xbeef
# USB product ID (PID)
PID = 0x0001

CDEFS  = -DDEVICE_VID=$(VID)UL
CDEFS += -DDEVICE_PID=$(PID)UL

## === C flags ===

INCFLAGS += -I$(INC_DIR) -I$(LUFA_PATH)/

CFLAGS = -std=gnu99 -mmcu=$(MCU) -DF_CPU=$(F_CPU)UL $(CDEFS)
CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
CFLAGS += -Wall -Wno-main -Wno-strict-prototypes -Wno-comment
CFLAGS += -g2 -Wextra -Wfatal-errors -Wno-unused-but-set-variable
CFLAGS += -ffunction-sections -fdata-sections -Os $(LUFA_OPTS)

LFLAGS =  -Wl,--gc-sections -Wl,--relax

# CFLAGS += -lm  ## Math
# CFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm  ## for floating-point printf
# CFLAGS += -Wl,-u,vfprintf -lprintf_min      ## for smaller printf


# ---------------------------------------------------------------------------

## Defined programs / locations
CC = avr-gcc
LD = avr-gcc
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
AVRSIZE = avr-size
AVRDUDE = avrdude

#$(wildcard $(SRC_DIR)/*.c)
SOURCES=src/main.c src/Descriptors.c $(LUFA_SRC_ALL_FILES)
OBJECTS=$(SOURCES:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
DEPENDS=$(OBJ_DIR)/.depends

TARGET=$(BIN_DIR)/$(APP)


.PHONY: all clean eeprom size


all: $(TARGET).hex size

debug:
	@echo "SOURCES $(SOURCES)"
	@echo "OBJECTS $(OBJECTS)"
	@echo "TARGET $(TARGET)"

eeprom: $(TARGET).eeprom

size: $(TARGET).elf
	$(AVRSIZE) -C --mcu=$(MCU) $<

$(TARGET).elf: $(OBJECTS) | $(BIN_DIR)
	$(LD) $(CFLAGS) $(LFLGAS) -o $@ $^

%.hex: %.elf
	$(OBJCOPY) -R .eeprom -O ihex $< $@

%.eeprom: %.elf
	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c | $(OBJ_DIR)
	$(CC) -c $(CFLAGS) $(INCFLAGS) -o $@ $<

$(DEPENDS): $(SOURCES) | $(OBJ_DIR)
	$(CC) $(INCFLAGS) -MM $(SOURCES) | sed -e 's!^!$(OBJ_DIR)/!' >$@

$(BIN_DIR):
	mkdir -p $@
$(OBJ_DIR):
	mkdir -p $@

clean:
	rm -rf $(BIN_DIR) $(OBJ_DIR)

## === avrdude ===

flash: $(TARGET).hex
	stty -F /dev/ttyACM0 speed 1200
	stty -F /dev/ttyACM0 speed 115200
	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U flash:w:$<

flashe: $(TARGET).eeprom
	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U eeprom:w:$<

shell:
	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nt