SENDLLO(3)

💅 SENDLLO — ok bestie, let's lock some devices DOWN 🔒✨

So real talk, the manual page name is SENDLLO(3) and it lives in section 3 of the linux-gpib manuals, and it's all about one tiny little function called SendLLO that puts your devices into local lockout mode. Yes queen, we're doing GPIB today. Buckle up. 🎀

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✨ NAME ✨

SendLLO — put devices into local lockout mode 💅

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🌸 SYNOPSIS 🌸

#include <gpib/ib.h>

void SendLLO(int board_desc);

Like that's it. That's the whole vibe. One header, one function, one int. No cap. 🦋

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👑 DESCRIPTION 👑

Okay so here's the tea, bestie. 🍓

SendLLO() asserts the 'remote enable' bus line, and then it sends the LLO command byte. That's the whole move.

And here's what happens to everybody on the bus when you do that:

• Any devices that are currently addressed as listener get put into RWLS (that's remote with lockout state, iykyk).
• All the other devices enter LWLS (local with lockout state).

And what does local lockout actually mean, you ask? 🧚 It means the remote/local mode of those devices cannot be changed through the devices' front-panel controls. Like, the buttons are still there, they're just not gonna do anything for you. The front panel has been politely asked to sit down and stop touching things. 💀

Lowkey important: unasserting the REN line should bring the devices out of lockout state. So that's your escape hatch, bestie. 🫶

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🌈 How is this different from SetRWLS()? 🤔

The SetRWLS() function performs a similar function, except (and this is the key part) it lets you specify which devices you wish to address as listener before sending the LLO command.

So basically: SendLLO() = everybody, no choices, no discussion. SetRWLS() = you pick the guest list first. Main character energy either way. ⭐

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💖 COPYRIGHT 💖

Copyright © 2003-2006, 2008 Frank Mori Hess

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okay and that's the whole page!! this one came from linux-gpib 4.3.7, dated 07/06/2026 — mwah, go forth and lock out some front panels, bestie, you got this 💜🎀✨