I know... but I was still doing the i2c-test, to see if the i2c configurations where right...

STK500 is the AVR programmer for the ATMega's.

Regards

Marques

On 21/12/06, timcrawford@comcast.net <timcrawford@comcast.net> wrote:
BTW:  The only reason to use jtag is to flash the boot loader.
All Robostix programming is done via gumstix.
http://docwiki.gumstix.org/Robostix#Programming

Tim
-------------- Original message ----------------------
From: timcrawford@comcast.net
> > I have an STK500 does it do the business?
>
> I have not heard of the STK500.
> The Robostix has JTAG available
> http://docwiki.gumstix.org/Robostix_I/O_pins
>
> > I would like to buy one, since I don't have enough electronic knowledge to
> > build from scratch a jtag adapter.
>
> JTAG is a universal method for accessing the internals of chips
> It is very standard.  This one looks good
> http://store.systronix.com/s.nl/it.A/id.145/.f?sc=2&category=20
>
> Tim
>
> > I would google it but there must be a common adapter or something that is-.
> > more helpfull when working with Robostix.
> > Is that soldering documented somewhere?
> >
> > Thanks and sorry for all this questions
> > Regards
> >
> > Marques
> >
> > On 21/12/06, timcrawford@comcast.net <timcrawford@comcast.net> wrote:
> > >
> > > Hi Mario,
> > >
> > > What expansion boards do you have?  Did you want to build
> > > one or buy one?  Try googleing for it.
> > > I know the STUART has the jtag signals available on the 20 pin connector.
> > > You will need to solder some wires from the 20 pin connector to the jtag
> > > connector.
> > >
> > > Tim
> > >
> > > -------------- Original message ----------------------
> > > From: "Mario Marques" < mario.marques@gmail.com>
> > > > Dave,
> > > >
> > > > Can you tell me please recommend and tell me where I can find a cheap
> > > jtag
> > > > adapter, and how do I connect it to the Robostix.
> > > >
> > > > Regards
> > > >
> > > > Marques
> > > >
> > > > On 21/12/06, Dave Hylands < dhylands@gmail.com> wrote:
> > > > >
> > > > > Hi Mario,
> > > > >
> > > > > > This is my first post on the mailing list.
> > > > > > Why does Gumstix have a mailing list and not a forum?
> > > > >
> > > > > The gumstix used to have a forum, and lots of people asked questions,
> > > > > but many of the questions went unanswered. Personally, I only like
> > > > > forums that have an email interface (very few of them do).
> > > > >
> > > > > > Searching this sourceforge mailing list is a nightmare.
> > > > > > This is very 90's.
> > > > >
> > > > > I agree. You can search through the archives using this interface
> > > > > instead:
> > > http://dir.gmane.org/gmane.linux.distributions.gumstix.general
> > > > >
> > > > > > I have successfully programmed my robostix several times using an
> > > > > STK500.
> > > > > > following the docwiki pages.
> > > > > >
> > > > > > Then yesterday when connecting the robostix, AvrStudio gave the
> > > > > following
> > > > > > error:
> > > > > >
> > > > > > A problem occured when executing the command. See the command output
> > > for
> > > > > > more info.
> > > > > > Tip: Check that the ISP programming frequency
> > > specified..........etc.
> > > > > etc.
> > > > > >
> > > > > > And now I can not view/change th fuses or program the Atmega128. I
> > > > > verified
> > > > > > that the STK500 is able to communicate with a Atmega8 that i happend
> > > to
> > > > > have
> > > > > > laying around so the problem is definitely with the robostix.
> > > > > >
> > > > > > I looked up this error on google and found a posting on a *forum*
> > > where
> > > > > > someone complained about the same thing and thought that it was
> > > because
> > > > > > maybe the fuse setting has changed magically in a way to not allow
> > > > > serial
> > > > > > programming any more (SPEN bit).
> > > > > >
> > > > > > Don't know what to do. I'm going to order another robostix because i
> > > > > need to
> > > > > > continue to work on this project but it would be great if you can
> > > help
> > > > > me
> > > > > > resolve this problem. Is there a way to do parallel programming with
> > > the
> > > > > > robostix and STK500 and will that help?
> > > > >
> > > > > I took a look at what's required to do parallel programming, and not
> > > > > all of the pins are easily accessible. I've heard pf ATMegas having
> > > > > weird problems like the one you describe, but haven't run into it
> > > > > personally.
> > > > >
> > > > > It sounds like one of the lock bits got programmed or something.
> > > > >
> > > > > Setting up to do JTAG programming is probably easier than parallel
> > > > > programming, but requires a JTAG adapter.
> > > > >
> > > > > And I don't recall hearing of anyone else repoting this problem
> > > > > before, so it's unlikely you'll find anything in the archives.
> > > > >
> > > > > I have had the crystal on one of my robostix go wonky (I get some
> > > > > really interesting flashing patterns on the LEDs when I download
> > > > > Flash-LED). If the crystal got disconnected, then that will also cause
> > > > > programming to fail. So if you have a scope, check to see if the
> > > > > crystal is functioning properly. I haven't gotten around to removing
> > > > > the crystal to figure out whats going on.
> > > > >
> > > > > I've been able to recover a couple of devices (that got their fuses
> > > > > set to use an external clock when none was present) by injecting a
> > > > > clock into the X1 pin. I believe that the STK500 has some clock
> > > > > sources available for doing this.
> > > > >
> > > > > --
> > > > > Dave Hylands
> > > > > Vancouver, BC, Canada
> > > > > http://www.DaveHylands.com/
> > > > >
> > > > >
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