Re: [AVaRICE-user] debugWire : debug slow...

[Rémi P. <mr....@la...>]

I've monitored usb using wireshark : break takes 1s, step takes 3s. 
Duration between 2 USB packets is at max 0.5s.

I'm glad to hear someone debugging at lightspeed with avarice + gdb. I 
hope I will manage to have such a setup.

I'm using avrdude for programming :
*    avrdude -pm328p -c dragon_isp -Pusb -v -U 
flash:w:arduino_avr_template_avr_plugin.hex:i*

debugWire fuse is set, so when I flash I have following logs :

*    avrdude: jtagmkII_setparm(): bad response to set parameter command: 
RSP_FAILED
     avrdude: jtagmkII_getsync(): ISP activation failed, trying debugWire
     avrdude: Target prepared for ISP, signed off.*

... then program is flashed. As I understand, ISB programming is used 
with debugWire fuse enabled.

Even if I wait during some seconds avarice won't run successfully, I 
have these logs :
*AVaRICE version 2.13, Sep 19 2014 09:15:10*

*    JTAG config starting.**
**    Found a device: AVRDRAGON**
**    Serial number:  00:a2:00:04:72:83**
**    set paramater command failed: DEBUGWIRE SYNC FAILED**
**    Failed to activate debugWIRE debugging protocol**
**    USB bulk read error: Input/output error**
**    USB daemon died

*
If I power off/power on MCU then avarice launches successfully.

Now I will test avarice programming.

Le 09/12/2014 13:13, Armin Otterstätter a écrit :
> breaking/stepping is instantly on my setup. At least so fast that it 
> just noteable to me.
>
> Regarding the ISP issue are you using avarice or avrdude for 
> programming? If avrdude, are you then using dragon with ISP or debugwire?
>
> For me programming with avarice is working just fine. But when I use 
> avrdude (which by itself also works just fine) I have to add some 
> delay before invoking avarice otherwise avarice cannot open the USB. 
> Because of that its (unfortunately) impossible to run avrdude as a 
> shell command through .gdbinit.
>
>
> 2014-12-09 11:34 GMT+01:00 Rémi Pincent <mr....@la... 
> <mailto:mr....@la...>>:
>
>     Yes I'm on an Arch distribution.
>     Thanks for wireshark tip. I will check USB connection.
>
>     How long is breaking/stepping with your setup?
>
>     In fact, flash ends successfully through ISP in debugWire mode.
>     But after, if I want to launch a debug session I must unplug MCU.
>     Reset line is just pulled up.
>     This problem is also descriped on this topic :
>     http://awtfy.com/2012/03/29/hardware-debugging-the-arduino-using-eclipse-and-the-avr-dragon/
>     "If you get an error, check that you’re using libusb. Also in most
>     cases just cycling the power on both the Dragon and the Arduino
>     puts it back to working. If you give avarice a -v flag for verbose
>     it will constantly spit shit out for you to read and not be
>     interested in as you debug. "
>
>     Lah.
>
>     Le 09/12/2014 10:27, Armin Otterstätter a écrit :
>>     I assume you're on Linux?
>>     I did the Tracing with Wireshark
>>     (http://wiki.wireshark.org/CaptureSetup/USB). There you can set
>>     the time-display to "relative to previous captured packet" (or
>>     similar) and then you can quickly see where the USB is hanging.
>>
>>     Hmm the DEBUGWIRE SYNC FAILD doesn't sound too good. When I'm
>>     downloading I don't have to unplug. Maybe there is some problem
>>     with the DebugWire communication alltogether. Do you have
>>     anything connected to Reset apart from the AVR Dragon?
>>
>>     Cheers,
>>     Armin
>>
>>     PS.: sorry missed the reply-all in the first response... so now
>>     back to the mailinglist...
>>
>>     2014-12-09 10:14 GMT+01:00 Rémi Pincent <mr....@la...
>>     <mailto:mr....@la...>>:
>>
>>         Hi Armin,
>>
>>         I'm using AVaRICE version 2.13, Sep 19 2014 09:15:10.
>>         According to sf status "AVaRICE 2.12 is the latest release."!
>>         What is your version?
>>
>>         How did you trace these USB issues?
>>
>>         Another question, after flashing code using debugger, I have
>>         to unplug/plug debugger and MCU  otherwise when I launch
>>         avarice I have "set paramater command failed: DEBUGWIRE SYNC
>>         FAILED", have you some tips in order to solve this issue?
>>
>>         Cheers
>>         Lah
>>
>>         Le 09/12/2014 10:08, Armin Otterstätter a écrit :
>>>         Which Version of avarice are you using?
>>>         I had similar problems when using the avarice that came with
>>>         an apt-get install on a recent ubuntu (Version 2.11). I
>>>         traced it down to some USB timeout issue. But the problem is
>>>         resolved in trunk. Just get the most recent version from
>>>         sf.net <http://sf.net>.
>>>         If you're on the trunk already then it'll probably be
>>>         something different...
>>>
>>>         Cheers,
>>>         Armin
>>>
>>>         2014-12-09 9:54 GMT+01:00 Rémi Pincent
>>>         <mr....@la... <mailto:mr....@la...>>:
>>>
>>>             Hi all,
>>>
>>>             I'm debugging ATmega328p with avarice + avr-gdb +
>>>             avrdragon using debugWire.
>>>             My binary is compiled with following options : -g2
>>>             -gstabs -O0
>>>             -ffunction-sections -fdata-sections -std=gnu99
>>>             All is right... But debugging is very slow, stepping is
>>>             awfully slow
>>>             (~5s), and breaking is also quite slow (~2s).
>>>             Moreover if have often to reflash code, it seems flash
>>>             get corrupted
>>>             when debug sessions does not finish cleanly.
>>>
>>>             I've written topic about this issue here
>>>             http://www.avrfreaks.net/forum/avrdragon-debugwire-atmega328p-nice-unusable
>>>             But for now, I haven't found any people working with a
>>>             usable debugging
>>>             environment with debugWire and avr-gdb... Suggestions
>>>             are about changing
>>>             toolchain and debugging tools in order to use some
>>>             proprietary solutions...
>>>
>>>             Have you got some suggestions in order to debug efficiently?
>>>
>>>             Regards.
>>>
>>>
>>>
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>>
>>
>
>