[avr-chat] Using avrdude on linux to enter and leave dW

[Markus Baertschi]

I'm exploring debugging via dW on linux. It looks to me like all the pieces are there, but I can not make it work. Therefore some questions.

I can enter dW mode using avrdude using this command line:

> avrdude -P usb -c dragon_isp -p t85 -v -U hfuse:w:0x9F:m

I did presume that using this I can go back to ISP:

> avrdude -P usb -c dragon_dw -p t85 -v -U hfuse:w:0xDF:m

But this does not work, it seems that avrdude can not really communicate with dW:

address@hidden:~$ avrdude -P usb -c dragon_dw -p t85 -v

avrdude: Version 5.10, compiled on Jun 30 2010 at 20:31:41

         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "/usr/local/avr/etc/avrdude.conf"

         User configuration file is "/home/markus/.avrduderc"

         Using Port                    : usb

         Using Programmer              : dragon_dw

avrdude: usbdev_open(): Found AVRDRAGON, serno: 00A2000053CF

JTAG ICE mkII sign-on message:

Communications protocol version: 1

M_MCU:

  boot-loader FW version:        255

  firmware version:              1.01

  hardware version:              1

S_MCU:

  boot-loader FW version:        255

  firmware version:              2.00

  hardware version:              6

Serial number:                   00:a2:00:00:53:cf

Device ID:                       AVRDRAGON

avrdude: jtagmkII_setparm(): bad response to set parameter command: RSP_DEBUGWIRE_SYNC_FAILED

avrdude: jtagmkII_close(): timeout/error communicating with programmer (status -1)

avrdude: jtagmkII_close(): timeout/error communicating with programmer (status -1)

avrdude done.  Thank you.

Any hints/experience on how to get out of dW mode again ?

--
Markus Baertschi, Bas du Rossé 16, CH-1163, Etoy, Switzerland
address@hidden, ++41 (79) 402 1186 (mobile)