[avrdude-dev] [bug #43898] atmega644p remains stopped after JTAG transaction

[Craig Leres]

URL:
  <http://savannah.nongnu.org/bugs/?43898>

                 Summary: atmega644p remains stopped after JTAG transaction
                 Project: AVR Downloader/UploaDEr
            Submitted by: leres
            Submitted on: Sun 28 Dec 2014 11:42:04 AM PST
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: leres
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Back when I upgraded from 5.11 to 6.0.1 I noticed that my atmega644p did not
resume after programming or reading. I'm using an AVR Dragon.

I've tracked this down to revisions 1070 and 1071 of jtagmkII.c.  From the
commit messages there appears to be an issue with the xmega.  The old code
issued the CMND_GO when device_descriptor_length was set. The current code
only isses a CMND_GO when AVRPART_HAS_PDI is set.

Attached is a patch vs 1353 that changes jtagmkII_close() to also issue
CMND_GO when PGM_FL_IS_JTAG is set which gives me 5.X behavior however is
likely wrong for the xmega case. I suspect the correct fix is to just avoid
issuing a GO when the target is an xmega.




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File Attachments:


-------------------------------------------------------
Date: Sun 28 Dec 2014 11:42:04 AM PST  Name: patch-jtagmkII.c  Size: 511B  
By: leres

<http://savannah.nongnu.org/bugs/download.php?file_id=32725>

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