Hi, Sorry for the delay in answering. I left the observatory and went on holiday for a while.
The standard NI driver can be downloaded from: http://sine.ni.com/nips/cds/view/p/lang/en/nid/14480 We found this on the NI web site. I do not know if it is useful: http://sine.ni.com/nips/cds/view/p/lang/en/nid/11737 Maybe it is the standard example that you already used to develop comedi/analogy drivers. Please let me know if it is of any use for you. Best regards Ettore On 5 June 2010 22:40, Alexis Berlemont <[email protected]> wrote: > Hi, > > Ettore Pedretti wrote: >> Hi, >> >> > On the other side, that is just the theory. I would not be surprised >> > to find a Comedi driver which proposes the behaviour you ask thanks to >> > a driver-specific hidden cheat flag somewhere in the structure. >> >> How can I find out the "hidden cheat" and how can I exploit it? >> > > That was just a supposition. I have not seen such a thing in the > Analogy NI driver (inherited from the Comedi one). Have you had a look > at the Comedi list ? > > I just read again your first mail. You said the NI Linux driver > provides the requested option. Do you have any source code ? I > remember just having found a binary driver. > >> >> What is the closest functionality I can get to programming the card >> >> and letting it run without further intervention? >> >> >> > >> > I have no answer so far. That would need an extension of the framework. >> >> How difficult would that be? Is it a major change to the framework? It >> seems to me that this is a nice option. You would not use any of your >> bus bandwidth and could just change the waveform when you need it. >> > > I agree this feature would be nice but I cannot tell you that I will > add some tricky code in some corner just to let this option work. The > problem with the command system is that it expects a continuous data > transfer until the end of the acquisition. > > Maybe, a way to quickly implement it would be to use an instruction > (it may be possible, I cannot ensure you); but to do so I need the > code which properly programs the DAQ-STC. > >> Ettore >> >> >> All the best >> >> Ettore >> >> >> >> _______________________________________________ >> >> Xenomai-help mailing list >> >> [email protected] >> >> https://mail.gna.org/listinfo/xenomai-help >> > >> > -- >> > Alexis. >> > >> >> >> >> -- >> Ettore Pedretti, SUPA >> School of Physics and Astronomy >> University of St Andrews, North Haugh, >> St Andrews, Fife, KY16 9SS, Scotland >> Ph: +44-1334-461666, Fax: +44-1334-463104 >> The University of St Andrews is a charity registered in Scotland : No >> SC013532 > > -- > Alexis. > -- Ettore Pedretti, SUPA School of Physics and Astronomy University of St Andrews, North Haugh, St Andrews, Fife, KY16 9SS, Scotland Ph: +44-1334-461666, Fax: +44-1334-463104 The University of St Andrews is a charity registered in Scotland : No SC013532 _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
