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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