Changing fuses

Other Hardware 3rd Party Boards
1

Hi,

Im pretty new to this kind of programming so don't know much about it.
I have a arduino uno and made a program for it but its working slow ( when i disconnect power from a input a led should light up but it takes like 10 sec or something before it lights up) so i was thinking the atmega328p-pu is using his internal crystal.
Or is the problem something else??
But i don't know how i could change the fuses.
I did some research on the internet and found you can do it with avrdude or boards.txt
and with board.txt i got this:

atmega328p-16.name=ATmega328p (external 16 MHz clock)

atmega328p-16.upload.protocol=usbtiny
atmega328p-16.upload.using=usbtinyisp
atmega328p-16.upload.maximum_size=32768
atmega328p-16.upload.speed=19200

atmega328p-16.bootloader.low_fuses=0xdf
atmega328p-16.bootloader.high_fuses=0xDF
atmega328p-16.bootloader.path=atmega328p
atmega328p-16.bootloader.file=optiboot_atmega328.hex
atmega328p-16.bootloader.extended_fuses=0xF9
atmega328p-16.bootloader.lock_bits=0xFF

atmega328p-16.build.mcu=atmega328p
atmega328p-16.build.f_cpu=16000000L
atmega328p-16.build.core=arduino:arduino
atmega328p-16.build.variant=arduino:standard

Are the fuses correct?
I know there are fuse calculators but i don't know how to use them.
So its just copying from the internet.

Or do i need to use this:

atmega328p-16.name=ATmega328p (external 16 MHz clock)
atmega328p-16.bootloader.low_fuses=0xff
atmega328p-16.bootloader.high_fuses=0xda
atmega328p-16.bootloader.extended_fuses=0x05
atmega328p-16.upload.maximum_size=32768
atmega328p-16.build.mcu=atmega328p
atmega328p-16.build.f_cpu=16000000L
atmega328p-16.build.core=arduino:arduino
atmega328p-16.build.variant=arduino:standard

and then burn a bootloader to it?
Or is it better with avrdude?

Thank you

2

Is it a factory part?
How have you got it connected? Some board variant, own PCB design, perf/strip board, breadboard?
What have you programmed it with?

3

From my topic: Copy 'n Paste Arduino Firmware
http://forum.arduino.cc/index.php?topic=182849.0
You can just use AVRDUDE from the Windows command prompt and get the fuse values.

Make sure the UNO is connected via USB. Note the COM# of the virtual port. Then substitute your COM# for my com9 entries below!

The standard boards.txt file for the UNO contains entries to set the fuses as:
high_fuses=0xDA
low_fuses=0xE2
extended_fuses=0x05

The equivalent manual force settings would be:

avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U hfuse:w:0xDA:m
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U lfuse:w:0xE2:m
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U efuse:w:0x05:m