RE: nervous about command timing

To clarify my problem, I need to find a way (comedi_command or otherwise) to
perform a set of AI reads and AO writes on multiple NI PCI DAQs, and it
needs to happen regularly on a timer.  Is there any way (interrupt or
otherwise) to set a timer value and be notified each time it recycles?  I've
been reading postings and it looks like this sort of request has been
popping up for at least 3 years.  

 

If the timer really isn't directly accessible, what kind of workaround would
at least function?  Should I tie a digital output line to a timer using a
command, then loop it back to a digital input on each card to serve as a
trigger?  That still wouldn't help my user code stay synced up.  It just
seems there should be a better way.

 

System info:

KNOPPIX 3.4 (hd installed)

Comedi 0.7.68

Comedilib 0.7.20

 

Michael Thomas