bugAVR Downloader/UploaDEr - Bugs: bug #46843, avrdude=>6 fails to write from...


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bug #46843: avrdude=>6 fails to write from 128k-mark onwards, loops back to 0x0000

Submitted by:  None
Submitted on:  Thu 07 Jan 2016 01:34:16 PM UTC  
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  Maarten van Eeuwijk
Originator Email:  -email is unavailable- Open/Closed:  Open
Release:  None Programmer hardware: 
Device type: 

Thu 07 Jan 2016 01:34:16 PM UTC, original submission:

avrdude version 6 series fails to write programs bigger than 131.072 bytes to flash on my atxmega256a3bu. Instead of continuing onwards from the 131.072 byte (128kb) mark, the write procedure loops back to 0x0000, corrupting data from there on.

Or to put it an another way: When I flash a program 130kb in size, I end up with 128k of data in my flash, whereof the first 2kb is corrupted.

This problem was introduced in the version 6 series of avrdude (I tried 6.0.1, 6.1, 6.1-svn-20131205 and 6.2). Version 5.11 works fine for me.

No errors show up during writing, the bug manifests itself during verification and of course execution of the program, as the mangled program crashes the MCU.

Curiously this 128k mark is exactly on the second time an offset is defined in my intel .hex file. To rule out problems with the file reader code for that format I also tried .srec and .elf; same result for all.



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