Re: [avr-chat] Config AVRDUDE for ATmega8U2

[Jeff Keyzer]

Henry,

I'm not sure where I saw the parameter "at90usb82".  Probably on 
avrfreaks (?).  I don't think the avrdude online documentation is 
necessarily up to date.

I also don't know if the shorter version will work - easy to try though!

Good luck.

Jeff Keyzer
MightyOhm Engineering
address@hidden


On 3/24/2011 6:31 PM, Henry Schwarz wrote:
> Jeff,
>
> Thanks very much for your reply. I am also using version 5.10. I will 
> try the command line that you suggested.
>
> I was pleased to see that your programmer is based on the USBtinyISP 
> (I assume from "-c usbtiny") since I was a little concerned that 
> SparkFun says they have only really tested their programmer with the 
> ATmega168 and ATmega328.
>
> I was wondering where you obtained the option "-p at90usb82" from, 
> since it is not listed at 
> http://www.nongnu.org/avrdude/user-manual/avrdude_4.html, but then I 
> actually read that page more thoroughly and saw that "-p ?" lists all 
> supported devices, and I see it there.
>
> BTW, can "-p at90usb82" and "-p usb82" be used interchangeably? I 
> would have thought that the symbolic text in the first column 
> ("usb82") should be used, rather than the more verbose text in the 
> second column ("at90usb82").
>
> Thanks again,
> Henry
>
>
> On 3/24/2011 5:00 PM, Jeff Keyzer wrote:
> > Henry,
> >
> > I have programmed the ATmega8U2 with
> >
> > "avrdude -c usbtiny -p at90usb82 -F -U flash:w:file.hex"
> >
> > What version of avrdude are you using? I am using 5.10.
> >
> > Jeff Keyzer
> > MightyOhm Engineering
> > address@hidden
> >
> >
> > On 3/24/2011 4:51 PM, Henry Schwarz wrote:
> > > Hi. I am trying to program the ATmega8U2 on an Arduino Uno
> > > (http://arduino.cc/en/Main/ArduinoBoardUno) using the 8U2's ICSP
> > > interface. I would like to use AVRDUDE and SparkFun's Pocket AVR
> > > Programmer (http://www.sparkfun.com/products/9825).
> > >
> > > However, the ATmega8U2 is not listed as a supported device for
> > > AVRDUDE, at least according to the list of parts at
> > > http://www.nongnu.org/avrdude/user-manual/avrdude_4.html.
> > >
> > > I would have tried AT90USB82, as recommended for the Atmel Flip DFU
> > > programmer (http://arduino.cc/en/Hacking/DFUProgramming8U2) but that
> > > too is not listed.
> > >
> > > The discussion at
> > > http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=91943 
> > > suggests
> > > using the -F switch to disable signature checking, and to then use
> > > AT90USB162 which apparently is compatible, but again, that part does
> > > not seem to be listed as a supported device.
> > >
> > > This link (http://forums.adafruit.com/viewtopic.php?f=24&t=19357) from
> > > 2007 discusses this question, but they don't say that they
> > > successfully tested their recommended config.
> > >
> > > Any suggestions on the best way to proceed?
> > >
> > > (To avoid confusion, note that the Arduino Uno's main micro is an
> > > ATmega328, with a 6-pin ICSP header. The ATmega8U2 on the Uno is a
> > > co-processor used for USB apps, with its own separate 6-pin ICSP 
> > > header.)
> > >
> > > Thanks very much,
> > > Henry
> > >
> > >
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