COMEDI_GET_MAXDATA(3)

💖 COMEDI_GET_MAXDATA 💖

okay bestie, welcome to the Comedi reference manual, section 3, and today's main character is comedi_get_maxdata — she's small, she's powerful, she tells you the biggest number your channel can handle. no cap. ✨

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🌸 NAME 🌸

comedi_get_maxdata — maximum sample of channel

like literally, the max sample value. that's the whole job. 💅

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🎀 SYNOPSIS 🎀

#include <comedilib.h>

lsampl_t comedi_get_maxdata(comedi_t * device, unsigned int subdevice,
                            unsigned int channel);

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🦋 DESCRIPTION 🦋

so the function comedi_get_maxdata returns the maximum valid data value for channel channel of subdevice subdevice belonging to the comedi device device.

that's it. that's the vibe. three things go in (device, subdevice, channel), one big shiny max value comes out. 🫶

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✨ RETURN VALUE ✨

the maximum valid sample value, or 0 on error.

⚠️ bestie please note: 0 is also a perfectly legal sample value, so if you see a 0 you can't always tell if it's "the max is zero" or "something went wrong". iykyk. 😭

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👑 AUTHORS 👑

these iconic humans made this happen, no cap:

• 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.

📜 real talk: LGPL 2.1, no warranty, that's the deal. read the license, it's giving legally binding. 💀

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okay that's the whole page, you ate it, periodt. 💅 this was Comedi, dated 03/20/2026, page COMEDI_GET_MAXDATA(3) — mwah, go read a channel max value or something, ily! 🎀🦋🌸✨