Re: External Trigger

From: Frank Mori Hess <fmhess_at_users.sourceforge.net> · Date: Wed, 19 May 2004 22:16:40 -0400

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You can set the CR_EDGE and CR_INVERT flags in the _arg to select between 
edge/level and high/low triggering.  Are you taking care to ground PFI1 or 
leaving it floating when it seems to trigger off other lines?

On Wednesday 19 May 2004 05:27 am, David wrote:
> Hi all
>
> We have configured cmd structure to adquire analog inputs with an
> external trigger.
>
> cmd->start_src = TRIG_EXT;
> cmd->start_arg = 1;
>
> It works but we are not sure about two things.
>
> First one, we can't found any place to select rising edge or falling
> edge, for digital trigger.
>
> The second is that we have detected that other PFI trigger lines can
> trigger in spite of we have selected star_arg = 1
>
> Any idea about that two things?
>
> Thanks all
> Best regards
>
>
> -- Daniel Machón [damachon_at_eresmas.net] --
>
>
> _______________________________________________
> comedi mailing list
> comedi_at_comedi.org
> https://cvs.comedi.org/cgi-bin/mailman/listinfo/comedi

- -- 
Frank

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