SENDIFC(3)

✨ SENDIFC(3) ✨

okay bestie, so this is SendIFC from the linux-gpib manuals (section 3, the library-calls girlies 💅) — it's short, it's iconic, it's a whole vibe reset for your GPIB bus 🦋

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💖 NAME 💖

SendIFC — perform interface clear 🎀

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🌸 SYNOPSIS 🌸

#include <gpib/ib.h>

void SendIFC(int board_desc);

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✨ DESCRIPTION ✨

okay so what SendIFC() does is reset the GPIB bus — and the way it does that is by asserting the 'interface clear' (IFC) bus line, and it holds that line down for at least 100 microseconds no cap. that's the whole move 💅

now here's the part where you gotta pay attention, bestie: the board you name in board_desc has to be the system controller to be able to assert IFC. that's literally the requirement, no skipping it 🙈

and once IFC goes out? the way that every single device just:

• untalks 🔇
• unlistens 🔇
• gets put into serial poll disabled state

and before you start spiralling — don't worry, you will still be able to conduct serial polls 😭 so it's not the tragedy it sounds like.

also the board becomes controller-in-charge 👑 main character energy fr fr.

so like, tl;dr: IFC = everyone shut up and sit down, board takes the aux cord 🎧

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🎀 COPYRIGHT 🎀

Copyright © 2003-2006, 2008 Frank Mori Hess 💜

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and that's the whole page bestie, periodt ✨ this was linux-gpib version 4.3.7, dated 07/06/2026, and yes the man page is literally called SENDIFC(3) — go assert your little bus line, you got this 🫶🌸💖