Re: [sigrok-devel] Siglent SDS2000X Plus series

[Christian M. <os...@c-...>]

Hello Marcel,

thanks for your answer. It's great that I reached you with the mail.

On 19/06/2020 08:16, marchelh wrote:
> Hi Christian,
> 
> I'm the author of the current implementation of the Siglent device
> driver. So maybe I can help finding the issue, also I have a almost
> direct path to Siglent engineering, and I'm able to ask direct questions
> when I have problems. I didn't read the complete message back but what I
> understand is that the device does not responde with the correct
> identification? Or does some functionality not work?

The device identifies itself with "SDS2000X Plus". I attached the patch
from my first mail again. With that patch I get some data but after some
samples (between half and two thirds of the data on the scope screen) I
only get a bit of noise and Sigrok hangs.

> If the device
> identification string is not recognized, than probably adding the device
> specific string in the list should work, however, it is possible that
> some of the properties that get set in this area need to be set for the
> 2000 Plus. I will have a look this weekend if I can find, based on the
> spec sheet, if there are any properties that need attention. 

I assume that one of the first problems is to get the values for the
fields in the structures right. The big problems are
- max_timebase in struct siglent_sds
- min_vdiv in struct siglent_sds
- min_timebase in siglent_sds_model

I'm not sure why these fields are arrays with two values each and I
haven't started reading the code yet to find that out.

> 
> Kind regards,
> Marcel. 
> 
> P.S. The Siglent devices have some quirks that some responces are slow,
> specially the older series. Als due to program memory limitations, not
> all advertised functions are available at API level. I have made some
> notes on that on the compatibility sheet of SigRok. 

Noted. From what I've seen the SDS2000X seemed quite fast. I haven't had
a really slow operation or response yet. But I haven't checked too much
on the network interface yet.

Best regards

Christian

> 
> 
> 
> -------- Oorspronkelijk bericht --------
> Van: Gerhard Sittig <ger...@gm...>
> Datum: 07-06-2020 22:15 (GMT+01:00)
> Aan: sig...@li...
> Onderwerp: Re: [sigrok-devel] Siglent SDS2000X Plus series
> 
> On Sun, 2020-06-07 at 16:40 +0200, Christian Mauderer wrote:
>>
>> I had already a short look at the structure definitions when adding this
>> but some haven't been clear without some further analysis. Therefore I
>> hoped that I would reach someone via the mailing list who has experience
>> with Siglent devices and maybe still has some notes from an earlier
>> port. That would be a better starting point. Analyzing the code without
>> that was my second best option after that.
> 
> Take my words with a grain of salt. And there are more than five
> people on the mailing list AFAIK. :) Let's see what others can
> say. Perhaps the author of the current Siglent SDS support is
> around as well. May just take a few days to respond perhaps.
> 
> 
> virtually yours
> Gerhard Sittig
> --
>      If you don't understand or are scared by any of the above
>              ask your parents or an adult to help you.
> 
> 
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