COMEDI_DATA_READ_DEL(3)

💖 COMEDI_DATA_READ_DEL(3) 💖

okay bestie, welcome to the Comedi reference page for comedi_data_read_delayed — yes the man page is literally named COMEDI_DATA_READ_DEL(3) because apparently nobody had the energy to type the whole thing out. we love a nickname era. ✨

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🌸 NAME 🌸

comedi_data_read_delayed — read a single sample from a channel, but like… after waiting for the specified settling time first 🫶

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✨ SYNOPSIS ✨

#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);

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💅 DESCRIPTION 💅

so it's literally comedi_data_read but with ✨patience✨. it waits the number of nanoseconds you asked for, between setting the input channel and actually taking the sample. iconic behavior honestly.

here's the tea for analog inputs: most boards have exactly one analog to digital converter, and it's multiplexed so it can read a bunch of channels. and like… if you switch channels and don't let the input settle, your reading is going to be straight-up inaccurate. 💀 so this function is the one you call when you want a multiplexed analog input to have a lil moment to settle after switching channels. main character behavior for accuracy. 🔥

⚠️ now the important bit, no cap: even though the settling time is specified in nanoseconds, the actual settling time gets rounded up to the nearest microsecond. so don't come for this function expecting sub-microsecond precision, bestie — that's just not the vibe it's giving.

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👑 AUTHORS 👑

• David Schleef <ds@schleef.org> — Author.
• Frank Mori Hess <fmhess@users.sourceforge.net> — Author.
• Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be> — Author.
• Bernd Porr <tech@linux-usb-daq.co.uk> — Author.
• Ian Abbott <abbotti@mev.co.uk> — Author.
• Éric Piel <piel@delmic.com> — Author.

the whole squad, periodt. 💜

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🌈 COPYRIGHT 🌈

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, 2015 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.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

🫶 real talk: no warranty, fr fr. read the license, it's the whole deal.

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okay that's the page 🎀 this one comes from the Comedi squad, page date 03/20/2026, and the man page is still answering to COMEDI_DATA_READ_DEL(3) — slay, go read your samples responsibly 💖✨🦋