comedi_data_read_delayed(3) read single sample from channel after delaying for specified settling time


#include <comedilib.h>

int comedi_data_read_delayed(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int range, unsigned int aref, lsampl_t * data, unsigned int nanosec);


Similar to comedi_data_read except it will wait for the specified number of nanoseconds between setting the input channel and taking a sample. For analog inputs, most boards have a single analog to digital converter which is multiplexed to be able to read multiple channels. If the input is not allowed to settle after the multiplexer switches channels, the reading will be inaccurate. This function is useful for allowing a multiplexed analog input to settle when switching channels.

Although the settling time is specified in nanoseconds, the actual settling time will be rounded up to the nearest microsecond.


David Schleef <[email protected]>


Frank Mori Hess <[email protected]>


Herman Bruyninckx <[email protected]>


Bernd Porr <[email protected]>


Ian Abbott <[email protected]>


Éric Piel <[email protected]>



Copyright © 1998-2003 David Schleef
Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
Copyright © 2002-2003 Herman Bruyninckx
Copyright © 2012 Bernd Porr
Copyright © 2012 Ian Abbott
Copyright © 2012 Éric Piel

This document is part of Comedilib. In the context of this document, the term "source code" as defined by the license is interpreted as the XML source.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, version 2.1 of the License.

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