Re: [avrdude-dev] Autoreset for Arduino Micro (Butterfly)

[Anton Smirnov]

Thanks for the great explanation!
10.09.2013 20:06 пользователь "Joerg Wunsch" <address@hidden> написал:

> As Anton Smirnov wrote:
>
> (I cannot comment on the Arduino stuff.)
>
> > PS. BTW I've seen some emails on "AVR109 not working" and related topics
> so
> > was it working in release 5.11 (i don't want to update as i have some
> > changes) or i have to update?
>
> There is one thing that was broken (all the time), it's handling all
> the flash addresses.  They are supposed to be provided as 16-bit word
> addresses, but have been specified as byte addresses.
>
> However, up to 5.11.1 (including), this bug did not manifest itself.
> AVRDUDE always started at address 0 anyway there, and the
> auto-increment feature correctly incremented the current address
> inside the bootloader anyway.
>
> Only starting with recent changes in SVN, AVRDUDE now calls the
> write_page() method once per page (instead of once per memory region
> before), and only for those pages that have actual data loaded from an
> input file.  That's why the bug started to became obvious now.
>
> If you are serious about adding features to the code base, please get
> the SVN trunk, and start over from there.  Many things have changed
> compared to 5.11.1, so otherwise, you might end up doing the work
> twice.
>
>
> The second thing is bug report #37997:
>
> https://savannah.nongnu.org/bugs/?37997
>
> As you can see from my latest comments, I suspect the originator of
> this bug report confused avr109 (aka. butterfly mode, i. e. the
> bootloader implementation) with avr910 (the standalone programmer).
> Both protocols are very close so the mistake doesn't become obvious
> immediately, and in addition, until AVRDUDE 5.3, it probably worked
> even when using the wrong programmer type.
> --
> cheers, Joerg               .-.-.   --... ...--   -.. .  DL8DTL
>
> http://www.sax.de/~joerg/
> Never trust an operating system you don't have sources for. ;-)
>
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