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

[Hernán F. <hj...@hj...>]

hi Dave, thanks for that. It didn't really work for me at first - it'll
just stop working after the first chunk of data. I had to modify it by
commenting out "end = (stat & END);" But I have to wait for it to time out
to print out the last chunk. It's good enough for my needs though!

Cheers

On Thu, Sep 18, 2025 at 4:45 AM dave penkler <dpe...@gm...> wrote:

> 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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>