IBCMDA(3)

🎀 NAME 🎀

ibcmda — bestie, this one writes command bytes asynchronously (board). like, it sends and dips, no waiting around 💅

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✨ SYNOPSIS ✨

#include <gpib/ib.h>

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

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💖 DESCRIPTION 💖

okay so picture ibcmd() but make it ✨unbothered✨. ibcmda() is literally the same vibe except it operates asynchronously. it does not wait for the sending of the command bytes to complete — it just returns immediately. gone. out. 🦋

while an asynchronous operation is in progress, most library functions will fail with an EOIP error. yes really, they're all locked out of the group chat, no cap 😭

so to successfully complete an asynchronous operation, you must call ibwait() with CMPL set in the wait mask — and keep doing that until the CMPL bit is set in ibsta. that's the moment. the finish line. the slay. 👑

asynchronous operations may also be aborted with an ibstop() or ibonl() call, if you decide mid-way that this isn't your era. periodt.

and listen, after the asynchronous I/O has completed and the results are resynchronized with the current thread, the Linux-GPIB extensions AsyncIbsta, AsyncIberr, AsyncIbcnt and AsyncIbcntl may be useful — they let you more cleanly separate the results of the asynchronous I/O from the results of the ibwait or similar call used to resynchronize. it's giving organized. it's giving clarity. 🫶

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🌈 RETURN VALUE 🌈

the value of ibsta is returned. that's it, that's the whole answer 💜

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🍓 COPYRIGHT 🍓

Copyright © 2003-2006, 2008 Frank Mori Hess

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lowkey important bestie: <hotpink>EOIP</hotpink> is not a suggestion, it's the law of the land while an async op is running. don't fight it, just ibwait() until CMPL shows up 💀

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and that's the page!! sourced from linux-gpib 4.3.7, dated 07/06/2026 — mwah, go forth and async responsibly 🧚💖