COMEDI_GET_CMD_GENER(3)

💖 COMEDI_GET_CMD_GENER(3) 💖

okay so this is a page from the Comedi reference manual bestie, and it's literally about comedi_get_cmd_generic_timed — yes the whole name, we're not abbreviating, say it with your chest 💅

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✨ NAME ✨

comedi_get_cmd_generic_timed — streaming input/output capabilities 🦋

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✨ SYNOPSIS ✨

#include <comedilib.h>

int comedi_get_cmd_generic_timed(comedi_t * device,
                                 unsigned int subdevice,
                                 comedi_cmd * command,
                                 unsigned int chanlist_len,
                                 unsigned int scan_period_ns);

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✨ DESCRIPTION ✨

So here's the tea 🍓 — this function goes and probes the command capabilities of the subdevice you point at with the device and subdevice parameters, and then it drops those results right into the command structure that the command parameter points to.

And like, it doesn't just look at it — it modifies the command structure pointed to by command so that it becomes a valid command you can actually use as a parameter to comedi_command (but only after the command has additionally been assigned a valid chanlist array, okay? that part is on you bestie, don't forget it 😭).

This command measures scans consisting of chanlist_len channels, at a scan rate that corresponds to a period of scan_period_ns nanoseconds. And because devices are picky little divas, the rate gets adjusted to a rate that the device can actually handle. no cap. 🔥

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✨ RETURN VALUE ✨

• On success, 0 is returned. 🎀
• On failure, -1 is returned. 💀

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✨ AUTHORS ✨

These icons built this thing and we're obsessed 👑

• 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 ✨

okay legal era, let's get into it 📜✨

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 the license, it's giving "actually important" energy, not me being dramatic for once 🙈

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and that's the whole page bestie!! slay 💖✨ this was the Comedi reference, dated 03/20/2026, and you absolutely ate this read-through. go forth and probe those subdevices 👑🎀