On Wed, 8 Sep 2010, Kalus Michael wrote:

> Hi.
>
> Is there a readme.txt or so giving hints how to establish the
> communicate via the USB of arduino board, after the
> duemilanove.eep.hex and duemilanove.hex are flashed successfully?
>
> Friends keep complaining not getting the ok using it from the shelf
> (ver4.1).
> There are various Linux in use and Windows as well.

It works just fine for me without any problems - connecting
tip (or screen) to the USB serial port using speed 19200 (or 9600
if you use defaults).

What needs to be observed are correct fuse settings - the AVR
should start from $0000 and not from the bootloader.

I am using http://www.engbedded.com/fusecalc to get fuses right
and one needs to have

Boot Reset vector Enabled (default address=$0000); [BOOTRST=0]

unchecked.

For ATmega328P I have:

avrdude: Device signature = 0x1e950f
avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as D9
avrdude: safemode: efuse reads as 5

For ATmega168 I have:

avrdude: Device signature = 0x1e9406
avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as DD
avrdude: safemode: efuse reads as 1

Hope this helps!

--Marcin



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