[avrdude-dev] [bug #34892] USBasp + ATMEGA328 broken in current SVN

[TomažŠolc]

URL:
  <http://savannah.nongnu.org/bugs/?34892>

                 Summary: USBasp + ATMEGA328 broken in current SVN
                 Project: AVR Downloader/UploaDEr
            Submitted by: avian
            Submitted on: Thu 24 Nov 2011 07:39:50 PM GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Tomaž
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hi

Sorry for yet another mail. While working on the "part parent" patch I noticed
that the current SVN head doesn't work with my setup: USBasp programmer and
ATMEGA 328.

It appears it will not program the chip at all and also always fails the
verification step:

avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0080
         0xff != 0x2a
avrdude: verification error; content mismatch

The exact command line I'm using is:

avrdude -F -p m328p -c usbasp -e -U flash:w:blink.hex

This same setup is working with avrdude 5.10

Using svn-bisect I found out that the bug appeared in revision 1007 (1006 is
the last one working correctly).

Since 1007 is a "mega-commit" it's hard to find what exactly introduced the
bug. I've been looking at the diff and can't spot it.

If someone more familiar with the code can help, I can give some more
debugging info.

Thanks
Tomaž




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