first commit

basic-setup/components/u8g2/sys/avr/avr-libc/atmega328p-hw-i2c/Makefile

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+CC = avr-gcc
+OBJCPY = avr-objcopy
+SIZE = avr-size
+MCU = atmega328p
+F_CPU = 16000000
+U8G2_SRC = ../../../../csrc
+CFLAGS = \
+	-mmcu=$(MCU) \
+	-DF_CPU=$(F_CPU)UL \
+	-Os \
+	-std=gnu99 \
+	-Werror \
+	-ffunction-sections \
+	-fdata-sections \
+	-I$(U8G2_SRC)/ \
+	-I../lib/ \
+	-DAVR_USE_HW_I2C 
+LDFLAGS = \
+	-Wl,--gc-sections \
+	-mmcu=$(MCU)
+AVRDUDE=avrdude
+PORT=/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A4008fhY-if00-port0
+
+SRC = $(shell ls $(U8G2_SRC)/*.c) $(shell ls ../lib/*.c) $(shell ls ../lib/avr-hw-i2c/*.c) $(shell ls ./*.c)
+
+OBJ = $(SRC:.c=.o)
+
+main.hex: main.elf
+	$(OBJCPY) -O ihex -R .eeprom -R .fuse -R .lock -R .signature main.elf main.hex
+
+main.elf: $(OBJ)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJ) -o $@
+
+size: main.elf
+	$(SIZE) --mcu=$(MCU) --format=avr main.elf
+
+clean:
+	rm -f $(OBJ) main.elf main.hex
+
+# Example for Arduino Duemilanove
+upload: main.hex
+	$(AVRDUDE) -p$(MCU) -carduino -P$(PORT) -b57600 -D -Uflash:w:main.hex:i