COMEDI_SV_UPDATE(3)

✨ NAME ✨

comedi_sv_update — slowly-varying inputs, bestie 💖 (this whole thing lives in the Comedi reference, section 3, iykyk)

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🫶 SYNOPSIS 🫶

#include <comedilib.h>

int comedi_sv_update(comedi_sv_t * sv);

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💀 STATUS 💀

deprecated. Yeah. It's giving "we still document it but pls don't build your whole personality on it". Not me being dramatic, that's literally what the page says 🙈

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🌸 DESCRIPTION 🌸

okay so here's the tea: comedi_sv_update updates the internal parameters of the slowly varying Comedi structure that sv points at.

That's it. That's the whole function. It's not reading a channel, it's not wrangling your hardware, it's just refreshing the internal state of the slowly varying thing you handed it. Lowkey iconic for how small it is 💅

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👑 AUTHORS 👑

The literal main characters who made this happen:

• 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.

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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.

fr fr read that license bit, it's not decorative — no warranty, use it at your own risk bestie 😭

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and that's a wrap! 🌈 this page is brought to you by Comedi, dated 03/20/2026, filed under COMEDI_SV_UPDATE(3) — slay, stay hydrated, and don't use deprecated functions 💜🦋