COMEDI_GET_RANGE(3)

💖 COMEDI_GET_RANGE 💖

okay bestie, you're in the Comedi reference section (3) for manual page COMEDI_GET_RANGE. It's a tiny one — one function, one struct pointer, zero drama — but it's lowkey the thing you need when you want the actual numbers behind a channel's range. Let's go 🦋

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✨ NAME ✨

comedi_get_range — range information of channel

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🌸 SYNOPSIS 🌸

#include <comedilib.h>

comedi_range * comedi_get_range(comedi_t * device,
                                unsigned int subdevice,
                                unsigned int channel,
                                unsigned int range);

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💅 DESCRIPTION 💅

So the way that comedi_get_range works is: it hands you back a pointer to a comedi_range structure, and that struct is absolutely packed with the tea about the range you asked for — specifically the range identified by your subdevice, channel, and range parameters. Main character struct energy fr fr 👑

And like, here's the important bit: that pointer stays valid until the Comedi device device gets closed. So don't go closing the device and then poking at the pointer, bestie, that's not the vibe 💀

If something goes sideways and there's an error, NULL is what you get back. Not an exception, not a little sad face — just NULL. So check it, always 🫶

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🎀 AUTHORS 🎀

These are the icons who made it 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.

okay so real talk: that's the LGPL, version 2.1, and there is no warranty — like, if this thing eats your DAQ setup, that's on you and not on the authors. Read the license, it's giving legally binding 💀

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and that's the whole page, bestie!! 🌈 this one came from the Comedi collection, dated 03/20/2026, filed under COMEDI_GET_RANGE(3). go get those ranges, you got this 💖✨🎀