> My overall idea here is to connect directly to midas so having some frontend features to analyze the data etc. do 
> you also have already a library for this? I can also extend your stuff.

No, sadly I don't have something like this yet. It has been on my "fun things to do at some point" list for too
long, but I haven't had the time.

If you start working on something like this, please keep me in the loop/link a repo here. I would be interested
on keeping an eye/contributing to something like this :)

> > I am writing a Rust based midas file reader
> 
> You might find this library I wrote useful: https://crates.io/crates/midasio
> 
> It should "just work", and if it doesn't, I would be interested to know.

Nice! I did not know about this. I have now also one simple reader but yours looks much more advanced. My 
overall idea here is to connect directly to midas so having some frontend features to analyze the data etc. do 
you also have already a library for this? I can also extend your stuff.

Best,
Marius

> I am writing a Rust based midas file reader

You might find this library I wrote useful: https://crates.io/crates/midasio

It should "just work", and if it doesn't, I would be interested to know.

> > Hi,
> > 
> > I am writing a Rust based midas file reader however it was kind of hard to understand the full midas file 
> > structure from the documentation.
> > 
> > Only at the end of the page 
> > https://daq00.triumf.ca/MidasWiki/index.php/Event_Structure#MIDAS_Format_Event one finds under the 
> > headline “tape format” that there are special events which mark the start and the end of the run. It would 
> > be better to place this information more prominent maybe we a headline: “Special Events”. Maybe a link to 
> > this section at the top of the page could help. Also at the mlogger page there is no information about this.
> > 
> > Best,
> > Marius
> 
> Ben was so kind to update the event documentation:
> 
>   https://daq00.triumf.ca/MidasWiki/index.php/Event_Structure
> 
> Please have a look and let us know if that's better now.
> 
> Best,
> Stefan

Thank you Ben! Now its super clear!

> Hi,
> 
> I am writing a Rust based midas file reader however it was kind of hard to understand the full midas file 
> structure from the documentation.
> 
> Only at the end of the page 
> https://daq00.triumf.ca/MidasWiki/index.php/Event_Structure#MIDAS_Format_Event one finds under the 
> headline “tape format” that there are special events which mark the start and the end of the run. It would 
> be better to place this information more prominent maybe we a headline: “Special Events”. Maybe a link to 
> this section at the top of the page could help. Also at the mlogger page there is no information about this.
> 
> Best,
> Marius

Ben was so kind to update the event documentation:

  https://daq00.triumf.ca/MidasWiki/index.php/Event_Structure

Please have a look and let us know if that's better now.

Best,
Stefan

Hi,

I am writing a Rust based midas file reader however it was kind of hard to understand the full midas file 
structure from the documentation.

Only at the end of the page 
https://daq00.triumf.ca/MidasWiki/index.php/Event_Structure#MIDAS_Format_Event one finds under the 
headline “tape format” that there are special events which mark the start and the end of the run. It would 
be better to place this information more prominent maybe we a headline: “Special Events”. Maybe a link to 
this section at the top of the page could help. Also at the mlogger page there is no information about this.

Best,
Marius

Ok, no relevant complains so far, so I removed mana and rmana from the CMake build 
process, but left the file mana.cxx still in the repository for educational 
purposes ;-)

Stefan

> This request came more than once in the past. One thing I could implement is a "atexit" function similarly to the C funciton atexit().
> 
> Then we would have a function in the script which gets called whenever one does "stop immediately". This function can then restore
> some ODB values or do whatever is necessary. 
> 
> If the sequencer gets killed in the middle, it can safely be restarted since the complete sequencer state is kept in the ODB under
> /Sequencer/State. After the restart, the sequencer continues exactly where it has been killed before.
> 
> Would that solve your problem?
> 
> Stefan

Yes, an "atexit" functionality within the Midas Sequencer Language would be useful for us with this issue.  Is this easy for you to implement?

Thanks,
Scott Oser

> > The linux kernel driver for the Universe-II VME to PCI bridge is updated to 
> > version -KO7. It now builds and runs with Debian-12 stock kernel 6.1.0-22-686.

Ahem, and the location is:

git clone https://daq00.triumf.ca/~olchansk/git/kernel-module-universe.git

K.O.

> The linux kernel driver for the Universe-II VME to PCI bridge is updated to 
> version -KO7. It now builds and runs with Debian-12 stock kernel 6.1.0-22-686.

I have a report that this driver might work on 64-bit VME CPUs (minus a bug in the 
MIDAS VME library). I do not have such hardware, cannot test, cannot confirm. (All our 
64-bit VME CPUs have the tsi148 bridge and run Ubuntu kernels and userland).

https://daq00.triumf.ca/elog-midas/Midas/2566

K.O.

The linux kernel driver for the Universe-II VME to PCI bridge is updated to 
version -KO7. It now builds and runs with Debian-12 stock kernel 6.1.0-22-686.

I pxe boot (isolinux/pxelinux) the linux kernel and NFS-mount the stock 32-bit 
Debian-12 userland. Userland tarball is available by request. PXE and NFS-Root 
configuration is written up on the wiki at daq.triumf.ca, example config files 
are available on request.

https://daq00.triumf.ca/DaqWiki/index.php/Ubuntu#setup_diskless_network_booting
https://daq00.triumf.ca/DaqWiki/index.php/VME-CPU

The Debian-11 kernel also works (use -KO6 driver is -KO7 bombs), but Debian-11 
kernel with Debian-12 userland and Ubuntu-22 NFS server fails with "file too 
big" errors, the best I can tell this has to do with old 32-bit kernels getting 
unhappy about 64-bit NFS inode numbers.

Cross-compilation from 64-bit Ubuntu-22 to 32-bit VME processors running 32-bit 
Debian-12 is written up here:
https://daq00.triumf.ca/DaqWiki/index.php/Ubuntu#32-bit_intel_cross-compiler

To cross-build 32-bit MIDAS for 32-bit VME processor use "make linux32" or build 
natively (pretty slow on 1 GHz Pentium-III).

K.O.

This request came more than once in the past. One thing I could implement is a "atexit" function similarly to the C funciton atexit().

Then we would have a function in the script which gets called whenever one does "stop immediately". This function can then restore
some ODB values or do whatever is necessary. 

If the sequencer gets killed in the middle, it can safely be restarted since the complete sequencer state is kept in the ODB under
/Sequencer/State. After the restart, the sequencer continues exactly where it has been killed before.

Would that solve your problem?

Stefan

We often use the MIDAS sequencer to temporarily control detector settings, such as:

* <change some setting>
* WAIT 60 seconds
* <revert setting to original value>

The question arises of what happens if the sequencer scripts gets aborted during that wait, preventing the value from being reset.  Depending on the setting, this could be undesirable or even damage something if left uncorrected for too long.

Is there any way to have a "safe abort" from the sequencer so that the "Stop immediately" button will call some cleanup script to leave things in a safe state?  Or what about if the sequencer process itself gets killed in the middle of a script?

How have other experiments using MIDAS protected themselves from unplanned terminations of sequencer scripts?

We are considering to remove the analyzer framework mana.cxx from MIDAS. It 
currently has some compiler warnings and we wonder if we should fix them which 
would take some time or just remove the file. We have now to much more modern 
analyzer frameworks "manalyzer" and "ROOTANA" which should be used instead.

Is anybody still using the mana.cxx framework?

/Stefan