Date: Wed, 18 Sep 1996 10:37:17 -0400 From: Dayton Clark <dayton@sci.brooklyn.cuny.edu> To: hdalog@zipnet.net Cc: questions@freebsd.org, pencil@holiday.sci.brooklyn.cuny.edu Subject: Re: LabPC+ problem Message-ID: <199609181437.KAA22006@robeson.sci.brooklyn.cuny.edu> In-Reply-To: <199609181016.GAA24326@hda.com> (message from Peter Dufault on Wed, 18 Sep 1996 06:16:10 -0400 (EDT))
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Thanks Peter. <.> > <.> > We're using the labpc driver with FreeBSD 2.1R. The system is a <.> > straight forward 486/33 with ISA bus. The board is a LabPC+. ... <.> <.> I assume you defeated the multiple open lockout to permit you <.> to open the digital and analog channels? That should be OK. <.> <.> The board and driver should support scanning - I'm using <.> it in an application at a clients to scan in five channels. Check <.> the minor number to make sure you are scanning from the correct <.> device - it has a field to set the upper bound on the scanning <.> sequence. Then use "dd" to read from that device and see if you <.> are getting all channels, eliminating problems with your user <.> code and pointing the finger at the driver. <.> Finally, see if there is a boundary issue with eight channels. Great suggestions. <.> <.> > If we are to venture further into the driver, do you have any words of <.> > wisdom on as to how to overcome the problem? A specific question is: <.> > why is the multi-open lockout necessary? <.> <.> The multi open lockout is to prevent you from trying to open the device <.> in, for example, scanning mode where it will scan through a channel <.> list and also in fixed-channel mode where you read a single channel. <.> <.> The driver would have to be made a lot smarter than it is to handle ... As I suspected. Thanks again. dayton
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