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abcminiuser / lufa

LUFA - the Lightweight USB Framework for AVRs.
http://www.lufa-lib.org
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Wrong at90usb82 Signatures #58

Closed NicoHood closed 9 years ago

NicoHood commented 9 years ago

https://github.com/abcminiuser/lufa/blob/master/Bootloaders/DFU/Descriptors.h#L121 https://github.com/abcminiuser/lufa/blob/master/Bootloaders/CDC/Descriptors.h#L87

Might also be in different bootloaders. Should be 0x93 instead of 0x94 (8kb flash, not 16).

Page 246 http://www.atmel.com/images/doc7707.pdf

Issue found here: https://github.com/NicoHood/HoodLoader2/issues/6#issuecomment-128988794

avrdude.exe: Device signature = 0x1e9482
avrdude.exe: Expected signature for AT90USB82 is 1E 93 82

Also have a look at the issue filed for my HoodLoader2 (which I linked above): CDC programming does not work for an 8u2 but with an at90usb82 (with the signature patched). The 8u2 setting only works if you use avrdude with at90usb82 settings and the -F switch. So I think it is an avrdude issue, not lufa. Any ideas about that?

Edit: avrdude bug: https://github.com/arduino/Arduino/issues/3645

abcminiuser commented 9 years ago

Looks like you are indeed very correct - I guess most people are using the ATMEGA8U2 rather than the older AT90USB82, so it hasn't come up until now. I'll patch it in the repo. Thanks!

abcminiuser commented 9 years ago

Fixed in e10b5ffe94e1cea8aa9a97edf4a547fe00ae80ef.