Re: [Linux-gpib-general] computer in listen-only mode?

[dave p. <dpe...@gm...>]

Hi Hernán,
This little programme works for me. It sets the pad of the controller to 23
and goes into listen mode by sending the command string UNL, UNT, LSN 23 to
the controller.
tplot2 >file.hpgl
cheers,
-Dave

On Thu, 18 Sept 2025 at 09:12, Hernán Freschi <hj...@hj...> wrote:

> Is it possible to run a device (a ni_pci in particular) in "listen only"
> mode? Instead of being a controller, I'd like it to be a listen only
> device, so I can emulate a plotter
>
> My idea is to just grab all of the HPGL commands a device sends and then
> convert into PDF.
>
> This has already been discussed 2 decades ago:
> https://sourceforge.net/p/linux-gpib/mailman/linux-gpib-general/thread/446940000.1056300621%40%5B192.168.1.1%5D/#msg2697429
> but the solution is specific to a particular device.
>
> The NI  forums mention:
>
> #define IbcLON 0x0022 /*Enter listen only mode*/
>
> but it doesn't seem like linux-gpib implements this?
>
> Thanks
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