From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 5 Jun 2010 23:40:05 +0200 From: Alexis Berlemont Message-ID: <20100605214004.GC8097@domain.hid> References: <20100602221243.GC2590@domain.hid> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Xenomai-help] National Instruments PCI-6711 List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Ettore Pedretti Cc: xenomai@xenomai.org, John Monnier 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 > >> Xenomai-help@domain.hid > >> 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.