STRUCT COMEDI_LRANGE(9)

💅 struct comedi_lrange(9) — like, the whole kernel API manual vibe 🎀

okay so bestie, we're doing a deep dive on struct comedi_lrange(9) — yes that's the name, and yes it's from the Kernel API Manual, and yes I'm obsessed already. it's giving "small struct, big responsibilities." let's go ✨

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🌸 NAME 🌸

struct comedi_lrange — literally just describes a COMEDI range table. that's the whole job. no cap. 👑

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✨ SYNOPSIS ✨

struct comedi_lrange {
    int length;
    struct comedi_krange range[];
};

look at her. two members. main character energy fr fr 🦋

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💖 Members 💖

• length — the number of entries in the range table. like a headcount for the ranger squad 🫶
• range — an array of struct comedi_krange, one for every range. one range = one entry, matching energy, periodt 💅

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🌈 Description 🌈

okay so each element of range[] describes the minimum and maximum physical range plus the type of units. that's it, that's the vibe check 🧚

typically the type of unit is UNIT_volt (i.e. volts, duh) and the minimum and maximum are in millionths of a volt. tiny numbers, big meaning, iykyk ⭐

there may also be a flag that indicates the minimum and maximum are merely scale factors for an unknown, external reference. lowkey mysterious, highkey useful 🙈

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🔥 SEE ALSO 🔥

• Kernel file: ./include/linux/comedi/comedidev.h
• struct comedi_subdevice(9)
• struct comedi_buf_page(9)
• struct comedi_buf_map(9)
• struct comedi_async(9)
• enum comedi_cb(9)
• struct comedi_driver(9)
• struct comedi_device(9)
• comedi_range_is_bipolar(9)
• comedi_range_is_unipolar(9)
• comedi_range_is_external(9)
• comedi_chan_range_is_bipolar(9)
• comedi_chan_range_is_unipolar(9)
• comedi_chan_range_is_external(9)
• comedi_offset_munge(9)
• comedi_bytes_per_sample(9)
• comedi_sample_shift(9)
• comedi_bytes_to_samples(9)
• comedi_samples_to_bytes(9)
• comedi_check_trigger_src(9)
• comedi_check_trigger_is_unique(9)
• comedi_check_trigger_arg_is(9)
• comedi_check_trigger_arg_min(9)
• comedi_check_trigger_arg_max(9)
• comedi_buf_n_bytes_ready(9)
• __comedi_request_region(9)
• comedi_request_region(9)
• module_comedi_driver(9)

like, that's the whole friend group right there 🫶💜

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and that's the page bestie! 🎀 this one lives under ./include/linux/comedi, dated October 2026, and it's part of the Kernel API Manual — struct comedi_lrange(9) out, slay forever 👑💖