[avrdude-dev] [bug #26312] OS X Intel AVR-Dragon "jtagmkII_getsync(): sign-on command: status -1" error

[Andreas Fertig]

URL:
  <http://savannah.nongnu.org/bugs/?26312>

                 Summary: OS X Intel AVR-Dragon "jtagmkII_getsync(): sign-on
command: status -1" error
                 Project: AVR Downloader/UploaDEr
            Submitted by: fertigtm
            Submitted on: Do 23 Apr 2009 16:33:27 GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: fertigtm
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hello folks,

I have had problems with avrdude and an avrdragon on my Intel Mac. Im running
Mac OS X 10.4.11. So far the problem was that avrdude says:
avrdude: usbdev_open(): Found AVRDRAGON, serno: XXXXX
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1

Searching the net I found entries to a similar problem but without a solution
to fix it. It seems that at least one person could bring it up and running
with upgrading to OS X 10.5.

As I'm not willing to upgrade yet I tracked to problem down. For this I tried
out several version of libusb. All had the same behavior, they failed. 

At least I could avoid the error by removing stk500v2_drain(pgm, 0) call in
stk500v2_dragon_isp_open().

It seems that the first initial read to USB which is done by the
stk500v2_drain function let the corresponding Mac OS X function return with a
timeout. This results in an error which let the application exit.

With a small patch you can avoid this behavior. For me it works great. I
tested it with uploading a program and downloading the fuse bytes.

The attached file contains a patch against avrdude 5.5.





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File Attachments:


-------------------------------------------------------
Date: Do 23 Apr 2009 16:33:27 GMT  Name: osxintelDragonFix.diff  Size: 439B  
By: fertigtm

<http://savannah.nongnu.org/bugs/download.php?file_id=18002>

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