IBCMD(3)

💖 IBCMD(3) — like, the manual page for ibcmd, bestie 💖

okay so this is the ibcmd page from the Traditional API Functions era and it's giving low-level GPIB realness, so buckle up 🎀

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✨ NAME ✨

ibcmd — write command bytes (board) 🦋

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✨ SYNOPSIS ✨

#include <gpib/ib.h>

int ibcmd(int ud, const void *commands, long num_bytes);

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✨ DESCRIPTION ✨

So <pink>ibcmd()straight up writes the command bytes sitting in the arraycommandsonto the bus 💅. How many bytes it pulls out of that array? That'snum_bytes`, bestie, literally that many.

The ud argument is a board descriptor, and bestie, the board must be controller-in-charge — that's not optional, that's the vibe check 👑

Most of the possible command bytes are declared as constants in the header files, periodt. Specifically, you've got these cuties available: GTL, SDC, PPConfig, GET, TCT, LLO, DCL, PPU, SPE, SPD, UNL, UNT,and PPD 🌸

Plus there are inline functions doing their little thing: MTA(), MLA(), MSA(), and PPE_byte(), and they produce the 'my talk address', 'my listen address', 'my secondary address', and 'parallel poll enable' command bytes respectively. iconic, honestly 💜

ngl, it's generally not necessary to call ibcmd(). It's there for advanced users who want direct, low-level access to the GPIB bus — main character energy for people who like touching the bus themselves 😭🔥

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✨ RETURN VALUE ✨

The value of ibsta is returned. that's it, that's the whole deal 💫

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✨ COPYRIGHT ✨

Copyright © 2003-2006, 2008 Frank Mori Hess 🫶

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okay and this gorgeous little page is from linux-gpib 4.3.7, dated 07/06/2026 — and it's the IBCMD(3) page, so that's a wrap bestie, go write some command bytes responsibly 💖✨🎀