Robostix questions

[FoxholeNorman]

I have been working with this thing for a while and I'm having a hard time getting all of these things straight.  Basically, what I want to do is use the gumstix i2c interface to get the robostix data and send it over an ethernet link on the netpro.  The gumstix stuff I'm straight on for the most part.  i'll be interfacing with PWMs and A/D inputs.  I have looked at athe i2c-io and i2c-io-api files, but I'm getting lost in what i really need to get it done.  Some questions...

What files do i need to get i2c communication going between gumstix and robostix?

I flashed the robostix with the Simple-Flasher.hex file but now i don't know how to get it off or how to get the bootloader going again (this is why i'm now actually wondering if i need the i2c bootloader at all since i used uisp to get the hex file on the robostix, but the i2c doesn't respond now).

As well, i inherited this robostix from someone elses project, so I'm not positive what's on there.  I know the i2c boot loader was there and the corresponding file for the robostix (based on the blinking red LED twice a second), but otherwise i don't know.  

Thanks for any help at all, I'm open to any comments.

[Dave Hylands]

Hi,

On Thu, Jul 2, 2009 at 7:54 AM, FoxholeNorman <Bmize4@...> wrote:

>
> I have been working with this thing for a while and I'm having a hard time
> getting all of these things straight.  Basically, what I want to do is use
> the gumstix i2c interface to get the robostix data and send it over an
> ethernet link on the netpro.  The gumstix stuff I'm straight on for the most
> part.  i'll be interfacing with PWMs and A/D inputs.  I have looked at athe
> i2c-io and i2c-io-api files, but I'm getting lost in what i really need to
> get it done.  Some questions...
>
> What files do i need to get i2c communication going between gumstix and
> robostix?

You need the i2c-slave code. You don't have to use the bootloader, I
just designed the bootloader because I plan on having multiple
robostix connected to the same gumstix, and having the i2c bootloader
allows all of the robostix to be updated in-situ.

So you'll need the i2c-slave.c and slave.h files.

You may want to use the i2c-api.c and .h files on the gumstix side of things.

i2c-io is just a sample app I created to demonstrate the use of i2c.

> I flashed the robostix with the Simple-Flasher.hex file but now i don't know
> how to get it off or how to get the bootloader going again (this is why i'm
> now actually wondering if i need the i2c bootloader at all since i used uisp
> to get the hex file on the robostix, but the i2c doesn't respond now).

When you download anything using uisp, you completely erase the flash
on the robostix, so the bootloader is gone. You'd need to re-download
the bootloader using uisp, and then use i2c-load to load the program
that you want.

--
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/

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