Re: [Gumstix-users] Robostix fuse help

[Lee W. <lee...@go...>]

Hi Dave,

You're always forthcoming with your help, thank you very much!

I do indeed have a flashing LED on there that works at the moment. I have
another Robostix that I have now programmed and got running so I know all
the connections to my STK500 are working properly but no matter what I do I
can't program the broken one despite it still running with its existing
code. It won't let me set fuses either.

Thanks for your help but I'm sure it's doomed :(

Lee

2008/7/11 Dave Hylands <dhy...@gm...>:

> Hi Lee,
>
> > I've been using a Robostix for quite a while now but for one reason or
> > another it has stopped letting me ISP new code to it, I'm using AVR
> Studio 4
> > which gives me the 'ISP MODE ERROR' window when I try to download code.
> The
> > code already flashed on there works fine when I power it up though! Could
> it
> > be a fuse problem? When I go to the fuse page none of the boxes are
> ticked
> > and the bottom window says 'fuses address 0 to 2... 0xFF, 0xFF, 0xFF'.
>
> That probably just means that it was unable to read the fuses (which
> is done using the same ISP mechanism as programming it is).
>
> Presumably you have a flashing LED or something to know that the
> program on the robostix is running? If the robostix is running, then
> that's generally sufficient to be able to program it, provided the
> lock bits haven't been programmed. If those are programmend, then
> you're out of luck.
>
> The only thing I've ever changed in AVR Studio is the ISP frequency.
> If your're using a real AVRISP, AVRISP II, or STK500, then you should
> be able to change the frequency. It's under the Advanced Tab in the
> programmer dialog (IIRC). Set it to something like 125 kHz.
>
> Does your robostix have the headers on the same side as the components?
>
> I assume that you've checked stuff like power to the robostix, and
> that your programmer is plugged in to the PC, and powered on, and
> plugged into the robostix.
>
> --
> Dave Hylands
> Vancouver, BC, Canada
> http://www.DaveHylands.com/ <http://www.davehylands.com/>
>
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