[avrdude-dev] [bug #36901] flashing Atmega32U4 EEPROM produces garbage on chip

[anonymous]

URL:
  <http://savannah.nongnu.org/bugs/?36901>

                 Summary: flashing Atmega32U4 EEPROM produces garbage on chip
                 Project: AVR Downloader/UploaDEr
            Submitted by: None
            Submitted on: Fr 20 Jul 2012 13:00:49 UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Matthias Trute
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Flashing the EEPROM area with avrdude svn-trunk (as of 20.7.2012) fail at the
verfication stage with an error message:

     [exec] avrdude: verification error, first mismatch at byte 0x0001
     [exec]          0x01 != 0xff
     [exec] avrdude: verification error; content mismatch

Erasing the chip with -e works correctly. Flashing the same hexfile with the
programming tool from AVR Studio6 under windows works fine and gives a working
system (same hardware)

Hardware details: address@hidden (U4DIL board from reworld.eu)
Programmer Model: AVRISP mkII
     [exec]          Hardware Version: 1
     [exec]          Firmware Version Master : 1.17

Attached 4 Hex files: 
 usb32-back.eep.hex-original from avrasm, 
 usb32-back.eep.hex-broken flashed and read back with avrdude
 usb32-back.eep.hex-fine flashed with Studion Programmer and read back with
avrdude.

Together with the usb32.hex the working eep file provides a forth system  with
a serial terminal at usart1 (38400 8N1) (for testing with the hardware
setup).




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File Attachments:


-------------------------------------------------------
Date: Fr 20 Jul 2012 13:00:49 UTC  Name: usb32.eep.hex-original  Size: 214B  
By: None
Hexfiles for both broken and working setups
<http://savannah.nongnu.org/bugs/download.php?file_id=26230>
-------------------------------------------------------
Date: Fr 20 Jul 2012 13:00:49 UTC  Name: usb32-back.eep.hex-broken  Size: 2kB 
 By: None
Hexfiles for both broken and working setups
<http://savannah.nongnu.org/bugs/download.php?file_id=26231>
-------------------------------------------------------
Date: Fr 20 Jul 2012 13:00:49 UTC  Name: usb32-back.eep.hex-fine  Size: 2kB  
By: None
Hexfiles for both broken and working setups
<http://savannah.nongnu.org/bugs/download.php?file_id=26232>
-------------------------------------------------------
Date: Fr 20 Jul 2012 13:00:49 UTC  Name: usb32.hex  Size: 71kB   By: None
Hexfiles for both broken and working setups
<http://savannah.nongnu.org/bugs/download.php?file_id=26233>

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