Re: DIO Change Detection

On Thursday 06 October 2005 09:50 am, Calin A. Culianu wrote:
> Does anyone know of any Comedi-supported board that can do DIO change
> detection (in order words, generate an interrupt to the CPU whenever
> digital input lines change state)?
>
> I know some boards out there can do this, but :
>
> 1. It isn't immediately obvious to me that the comedi_cmd interface can
> clearly express this..
>
> 2. Even so, do any comedi drivers support this feature on any boards
> that my have this as a feature?
>

The comedi_parport and amplc_dio200 drivers do by having a read cmd which 
generates a value for each interrupt triggered.  It won't work for the 
ni_pcimio driver though, since currently boards are limited to supporting 
read commands on only one subdevice.

-- 
Frank