[avr-chat] avrdude possibly flashes last part in wrong page of ATmega2561

[Harald Kipp]

Hi,

When using avrdude Version 5.3.1, compiled on Jan  1 2007 at 14:25:19 
(WinAVR) with the SP Duo firmware version 2.2, one of the Nut/OS samples 
is not flashed correctly.

 avrdude -p atmega2561 -P com2 -c stk500v2 -U flash:w:inetq.hex

gives

 avrdude: verification error, first mismatch at byte 0x10000
          0x90 != 0xff
 avrdude: verification error; content mismatch

The SP Duo emulates the STK500v2 protocol. In case you'd need more 
infos, see
http://www.ethernut.de/en/isp/spduo.html

With AVR Studio 4.13 Build 528 the same programmer programs the same 
target with the same hex file correctly.

Anyone with an ATmega2561 board with a different STK500v2 programmer, 
who can verify this? I'm almost sure, that the problem is cause by 
avrdude...but often I overlook the most obvious.

This archive
http://www.ethernut.de/arc/inetq-spduo.zip
contains the application build, including elf, bin, map and other files 
including

 inetq.hex - the original hex file
 image-spduo.hex - image of the failed avrdude programming, read back 
with AVR Studio and JTAGICE
 image-jtagice.hex - image of correct programming (at least this one 
runs fine)


Many thanks for taking the time,

Harald