Re: [Gumstix-users] gpio-event for robostix

[Andrei R. <po...@gm...>]

On 2/17/07, Tom Playford <tom...@gm...> wrote:
> Hi all,
>
> I am a fan of Dave Hylands gpio-event driver, and I've used it on a
> few projects.
>
> I now find myself trying to archive the same result for some buttons
> wired into a robostix attached to a gumstix.
>
> I have the i2c-io program working and reading the states of the input pins.
>
> I was thinking the simplest method would be to add some extra
> functions to the i2c-io program running on the robostix to implement
> some sort of event logging structure.

That's what I did when I played with SPI driver for Robostix - details are
in Wiki under software samples.
Your modified i2c-io program may raise ATM IRQ line on the Robostix side,
and you can monitor the line on Gumstix side with gpio-event and do i2c-io
in response. Somewhere along the way Robostix has to reset ATM IRQ
and everything starts over.