Re: [Gumstix-users] i2c-test...

[Dave H. <dhy...@gm...>]

Hi Andrew,

On 2/3/07, Andrew Biondi <qua...@gm...> wrote:
> Hi all, I'm trying the i2c-test program, but I'm having some troubles with
> i2c.
>
> Configuration:
> gs 200xm connex (2.6.18 gcc 3.4)
> robostix (programming jumper done)
> tweener (modified, I get the console correctly)
>
> I've loaded the i2c-test with the AVR-PG1 and PonyProg, blue led on the
> robostix slowly blinks.

How slowly? It should on for 1 second, off for 1 second.

You may have forgotten to program the fuses. See:
http://docswiki.gumstix.com/Robostix_fuses

> Removed i2c-dev and i2c-pxa correctly, run i2c-test
> and got:
>
> gumstix: SCL 1 SDA 1
>
> when I press space bar I keep reading the gumstix line and I dont see
> the robostix line.

Which also indicates that the fuses may be wrong. Getting the fuses
wrong will cause the baud rate to be incorrect.

> If I load the i2c-io program and try the i2c-io info command I got a
> "exhausted retries" (timeout) error.
> I'm probably missing something obvious... any idea? Thanks!

i2c-io on the gumstix needs the i2c bootloader loaded on the gumstix
and then you need to load i2c-io.hex using i2c-load.

Using the bootloader also requires slightly different fuses than the
ones shown on the fuses page.

Also, make sure that you power off and unplug the gumstix when usng an
ISP programmer with the robostix.

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