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CC = avr-gcc
MCU = atmega328p
PORT = /dev/cuaU0
TARGET = app
SRC = main.c
OBJ = $(SRC:.c=.o)
CFLAGS = -std=gnu99
CFLAGS += -Os
CFLAGS += -Wall
CFLAGS += -mmcu=$(MCU)
CFLAGS += -DBAUD=57600
CFLAGS += -DF_CPU=8000000UL
CFLAGS += -ffunction-sections -fdata-sections
LDFLAGS = -mmcu=$(MCU)
LDFLAGS += -Wl,--gc-sections
HEX_FLAGS = -O ihex
HEX_FLAGS += -j .text -j .data
AVRDUDE_FLAGS = -p $(MCU)
AVRDUDE_FLAGS += -c arduino
AVRDUDE_FLAGS += -b 57600
AVRDUDE_FLAGS += -P $(PORT)
AVRDUDE_FLAGS += -D -U
%.o: %.c
$(CC) $(CFLAGS) -c -o $@ $<
elf: $(OBJ)
$(CC) $(LDFLAGS) $(OBJ) -o $(TARGET).elf
hex: elf
avr-objcopy $(HEX_FLAGS) $(TARGET).elf $(TARGET).hex
upload: hex
avrdude $(AVRDUDE_FLAGS) flash:w:$(TARGET).hex:i
.PHONY: clean
clean:
rm -f *.o *.elf *.hex
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