I am a long-time Voyage user (started at 0.2, currently on 0.5 for most systems) that wants to do some new GPIO stuff with the Alix 3C2 board. The goal here is to have a way to turn the Alix off in an semi-elegant way a short period of time (10 minutes) after ignition is turned off for a mobile Alix solution.
For this new application, we'd like to integrate Alix 3C2 (or perhaps a nearby model Alix) with a shutdown controller in a vehicle (similar to: http://www.mpegbox.com/microsdc/index.html). In order to interface with this unit, we'd like to read a signal from the shutdown controller that is either open or shorts to ground, depending on what the shutdown controller sees on the ignition line high or not.
I am none-too-clever with circuit design, and would prefer not to build something that lets out the white smoke from a bunch of Alix boards. But I assume there is a small circuit that would be build here that is pretty fail-safe for reading such an open or closed input?
There is an alternate line on the shutdown controller which sends momentary connect to ground but is otherwise open -- not sure that'd be any easier to read, though.
Anyone have some good suggestions on best way to do this, both from an electronics point of view, as well as a GPIO driver point of view? I see there are a few different driver solutions now in GPIO-land, but not sure which is best for for this kind of simple task.
Cheers, - Michael _______________________________________________ Voyage-linux mailing list [email protected] http://list.voyage.hk/mailman/listinfo/voyage-linux
