COMEDI_SV_INIT(3)

✨ COMEDI_SV_INIT ✨

okay bestie come CLOSE 💖 we're doing a Comedi reference page, section 3 of the manual, and it's literally called comedi_sv_init. slow, chill, vibes-only analog input. let's get into it 🦋

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🌸 NAME 🌸

comedi_sv_init — slowly-varying inputs 💅

🌈 SYNOPSIS 🌈

#include <comedilib.h>

int comedi_sv_init(comedi_sv_t * sv, comedi_t * device,
                   unsigned int subdevice, unsigned int channel);

💀 STATUS 💀

deprecated

not me showing you a deprecated function 😭 it's giving "we still document it because history matters" but fr fr, the library itself is telling you this one's on its way out. respect the elders tho 🫶

🎀 DESCRIPTION 🎀

so here's the tea, bestie ✨ comedi_sv_init takes the slow varying Comedi structure that sv points to and sets it all up to use:

• the device device 👑
• the analog input subdevice subdevice 🌸
• and the channel channel 💜

and why do we care about this slow varying Comedi structure? because comedi_sv_measure uses it to accurately measure an analog input by averaging over like, a whole bunch of samples 🔥 it's the "collect many, average, glow" method. iconic behaviour honestly.

the default number of samples is 100. no cap. ✨

🍓 RETURN VALUE 🍓

she returns 0 when everything slays, and -1 when it does NOT. that's it, that's the whole vibe check 😭

👑 AUTHORS 👑

the literal main characters who built this:

• 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. 🎀

💅 COPYRIGHT 💅

the receipts, verbatim, because we do NOT erase people's work:

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. 💌

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bestie reminder: deprecated means deprecated. it still documents, it still works (per the docs), but the universe is moving on 🌈

and that's the page!! this one came from the Comedi source, dated 03/20/2026, filed under COMEDI_SV_INIT(3) in the manual. periodt 💅💖✨