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From: | Jeff Keyzer |
Subject: | Re: [avr-chat] Config AVRDUDE for ATmega8U2 |
Date: | Thu, 24 Mar 2011 18:36:07 -0500 |
User-agent: | Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.15) Gecko/20110303 Lightning/1.0b2 Thunderbird/3.1.9 |
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 athttp://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=91943 suggestsusing 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 aco-processor used for USB apps, with its own separate 6-pin ICSP header.)Thanks very much, Henry _______________________________________________ AVR-chat mailing list address@hidden http://lists.nongnu.org/mailman/listinfo/avr-chat
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