now using optiboot bootloader (arduino bootloader does not support well watchdog)

arduino_nano/Makefile

@@ -12,9 +12,9 @@ F_CPU = 16000000UL
 PROGRAMMER = arduino
 PORT = /dev/ttyUSB0
 # to flash
-# use the aduino bootlaoder, with a baudrate of 57600
-# reset the device to start bootlaoder
-FLASHER = avrdude -p $(DEVICE) -c $(PROGRAMMER) -P $(PORT) -b 57600 -D
+# use the aduino bootloader, with a baudrate of 57600
+# reset the device to start (optiboot) bootloader
+FLASHER = avrdude -p $(DEVICE) -c $(PROGRAMMER) -P $(PORT) -b 115200 -D
 
 # compiler executables
 CC = avr-gcc
@@ -56,21 +56,22 @@ debug: map lst all
 # after reset the bootloader is start
 # the bootloader can be used to reflash the device
 reset:
-	stty 57600 raw ignbrk hup < $(PORT)
+	stty 115200 raw ignbrk hup < $(PORT)
 
 # flash the device using the internal bootloader
 flash: $(TARGET).hex reset
 	$(FLASHER) -U flash:w:$<:i
 
-# write EEPROM on the device
+# write EEPROM on the device (optiboot has EEPROM capabilities disabled by default)
 eeprom: $(TARGET)_eeprom.hex reset
 	$(FLASHER) -U eeprom:w:$<:i
 
-# write bootloader and fuses
-bootloader:
-	wget https://arduino.googlecode.com/svn/trunk/hardware/arduino/bootloaders/atmega/ATmegaBOOT_168_atmega328.hex
-	avrdude -p $(DEVICE) -c usbtiny	-U lfuse:w:0xff:m -U hfuse:w:0xda:m -U efuse:w:0x05:m -U flash:w:ATmegaBOOT_168_atmega328.hex:i
-	rm ATmegaBOOT_168_atmega328.hex
+# write bootloader (optiboot) and fuses
+bootloader.hex:
+	wget -O $@ https://github.com/Optiboot/optiboot/raw/master/optiboot/bootloaders/optiboot/optiboot_atmega328.hex
+
+bootloader: bootloader.hex
+	avrdude -p $(DEVICE) -c usbtiny -U lfuse:w:0xff:m -U hfuse:w:0xda:m -U efuse:w:0x05:m -U flash:w:$<:i
 
 # create main target firmware
 compile: $(TARGET).elf