DA start unsuccessfully

liqixue12

Hello
I have two troubles in using artiq.

When power on and initializing, the DA device (zotino) can not start normally while other devices are working well, e.g. DDS device (urukul), TTL device. As for this problem, i have ever seen in your github pages, but there is no corresponding reason or solution, so can you tell me how to deal with this?
Our artiq program with python is fixed absolutely, then i want to accelerate the schedule of running artiq, for exampple, skipping the compile process of .py files. Is there any solution for me?

sb10q

liqixue12 When power on and initializing, the DA device (zotino) can not start normally while other devices are working well, e.g. DDS device (urukul), TTL device. As for this problem, i have ever seen in your github pages, but there is no corresponding reason or solution, so can you tell me how to deal with this?

Please provide more information. What is the error message/unexpected behavior, system variant, ARTIQ firmware and software version, etc.

Our artiq program with python is fixed absolutely, then i want to accelerate the schedule of running artiq, for exampple, skipping the compile process of .py files. Is there any solution for me?

On the long term the new compiler project (NAC3) will speed up compilation.
If your program is indeed fixed and does not do RPC, you can use artiq_compile to produce a ELF file.

liqixue12

sb10q

There is no running error on the artiq program, the phenomenon is that the DA's output is only 0.0V whatever the value you set. Both the firmware and software version is 4.x series.
Our python program only need read several .txt files for loading some parameters before running in the Kernel, can this condition be speed up?

sb10q

liqixue12 There is no running error on the artiq program, the phenomenon is that the DA's output is only 0.0V whatever the value you set. Both the firmware and software version is 4.x series.

Was it working before? Did you do anything to the software or hardware that caused the problem?

Our python program only need read several .txt files for loading some parameters before running in the Kernel, can this condition be speed up?

Maybe you can put those values into the core device cache and then use a pre-compiled kernel with artiq_compile?

liqixue12

sb10q
Thanks for your reply!

This problem exist since i get the devices in 2018, but this problem is getting more frequent. I find the only solution is to power on and initialize the devices several times, but i don't know if this specical solution will be failed in the future. I want to know the reason about it to solve it absolutely, because i have ever seen the same question in the github of sinara-hw.
Ok, we will study artiq_compile carefully to see if it could solve our problem.

sb10q

With a Zotino from 2018 it is most likely this issue:
https://github.com/sinara-hw/Zotino/issues/2
and fix:
https://github.com/sinara-hw/Zotino/issues/2#issuecomment-405894610

liqixue12

sb10q
I carefully read the issue you share for me, and i guess the two peoblems are not the same.
Maybe the problem i face is simpler.
Our Zotino is just unable to start successfully sometimes after re-powering on, and the phenomenon is that DA's output is only 0.0V whatever the value you set.
However, when i start zotino successfully through re-powering on and initializing several times，the DA device can be work well all the time.

sb10q

Check the issue carefully; this is a latch-up issue and it can definitely cause the symptoms you are seeing (and worse). And your Zotino dates back from before we identified the problem and fixed the design.

liqixue12

sb10q 1. I read all the discussion about the issue carefully, and i am aware of what maybe cause this problem. But i can't change any circuit of our zotino now, because it has embed into our experiment system. I can only pray that it won't get worse.

Can you please briefly tell me how to use the artiq_compile to produce a ELF file and how to run it?