 04 Jun 2020, Stefan Ritt, Forum, Template of slow control frontend
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> I’m beginner of Midas, and trying to develop the slow control front-end with the latest Midas.
> I found the scfe.cxx in the “example”, but not enough to refer to write the front-end for my own devices
> because it contains only nulldevice and null bus driver case...
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05 Jun 2020, Stefan Ritt, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Marius,
your fix is good. Thanks for digging out this deep-lying issue, which would have haunted us if we would not fix it.
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10 Jun 2020, Stefan Ritt, Forum, slow-control equipment crashes when running multi-threaded on a remote machine
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Few comments:
- As KO write, we might need semaphores also on a remote front-end, in case several programs share the same hardware. So it should work and cm_get_path() |
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15 Jun 2020, Stefan Ritt, Bug Report, deprecated function stime()
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The function stime() has been replaced by clock_settime() on Feb. 2020:
https://bitbucket.org/tmidas/midas/commits/c732120e7c68bbcdbbc6236c1fe894c401d9bbbd
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18 Jun 2020, Stefan Ritt, Forum, ODB key length
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No. But if you need more than 32 characters, you do something wrong. The
information you want to put into the ODB key name should probably be stored in
another string key or so.
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23 Jun 2020, Stefan Ritt, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Marius,
thanks for your help, you identified the problematic location. I changed that to
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 24 Jun 2020, Stefan Ritt, Info, New image history system available 
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I'm happy to report that the Corona Lockdown in Europe also had some positive side
effects: Finally I found time to implement an image history system in midas,
something I wanted to do since many years, but never found time for that.
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15 Jul 2020, Stefan Ritt, Info, Makefile update
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Please note that you can also compile midas in the standard cmake way with
$ mkdir build
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15 Jul 2020, Stefan Ritt, Info, Minimal CMakeLists.txt for your midas front-end
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Since a few people asked me, here is a "minimal" CMakeLists.txt file for a user-written front-end
program "myfe":
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10 Aug 2020, Stefan Ritt, Bug Report, data missing in runXXXXXX.mid
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> Dear all
>
> We just started our beam time at ILL and just found yesterday that for certain
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10 Aug 2020, Stefan Ritt, Bug Report, data missing in runXXXXXX.mid
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> Both set to -1. We only have one logging channel. If we run a sequence with a few runs and the
> same settings, sometimes data is in the .mid file and sometimes it is not.
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10 Aug 2020, Stefan Ritt, Bug Report, data missing in runXXXXXX.mid
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> So I did a quick check. The file size is about the same (322K and 329K). When I dump the .mid I don't see
> the banks. It only prints two lines with "------ Event# 0 ------" and "------ Event# 1 ------" whereas for
> the file with data I get the two banks with all the data. Our online analyzer also fails to see the banks.
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10 Aug 2020, Stefan Ritt, Bug Report, data missing in runXXXXXX.mid
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| Have you tried longer files? Maybe a few 100 MB or so. Maybe a buffer is not flushed correctly at the end of a run. |
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10 Aug 2020, Stefan Ritt, Bug Report, data missing in runXXXXXX.mid
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I have to reproduce the problem to fix it. Why don't you go and modify midas/examples/experiment/frontend.cxx in such a way that
it creates exactly the banks you have, just with random data. If you see the same problem, send me your frontend file so that I
can reproduce it. |
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13 Aug 2020, Stefan Ritt, Suggestion, adding db_get_mode ti check access mode for keys
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> Hello,
>
> I am wondering if there is a function that checks the access mode for a key? I
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24 Aug 2020, Stefan Ritt, Forum, time information
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> 1. Is it possible to get "Running time" using, for example, jsonrpc? (please see
> the attached file)
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20 Oct 2020, Stefan Ritt, Info, About remote control of front end part of MIDAS on chip
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We also use a Zynq chip and boot in the following order:
1. SD Card
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17 Nov 2020, Stefan Ritt, Info, Equipment "common" settings in ODB
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Today I addressed a topic which bugged me since long time. The ODB contains
settings under /Equipment/<name>/Common which are a "mirror" of the equipment[]
setting in a frontend (using the mfe.cxx framework). If the "Common" entry in
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19 Nov 2020, Stefan Ritt, Forum, History plot consuming too much memory
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The history code is right now programmes in such a way that when you request
an old time window, then all data from that window until the present date
gets loaded. When we implemented that, this worked fine for data ranges of
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20 Nov 2020, Stefan Ritt, Forum, History plot consuming too much memory
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> Taking this down a tangent, I have a mild concern that a user could temporarily
> flood our gigabit network if we do have faster disks to read the history data. Have
> there been any plans or thoughts on limiting the bandwidth users can pull from
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