When to open a discussion

[coretl]

Please use this discussion area to ask any general PandA questions

[jc70100322]

I am a novice user of Pandabox. When I was conducting the simulation of simserver and pymalcolm in the Pandabox-server project, I encountered the following errors: it indicated that block query was not supported, the server ended abnormally, and the client timed out and exited. Could someone please help me figure out what the possible causes of this problem might be?

[coretl]

Please could you post the exact command you ran that exited? Which versions of the modules do you have cloned?

[jc70100322]

Thanks for your replay. sim_server is from "https://github.com/PandABlocks/PandABlocks-FPGA" latest version, i am download zip package，and imalcolm.py is from malcolmjs which is also download zip format from master branch.

The exact command refers to the link shown in the following screenshot.

malcolmjs:

[coretl]

I see, unfortunately the simulation has fallen into disrepair as no-one has been using it, so we are about to remove the current simulation method and replace it with a more maintainable version. Can I ask what you would like to use the simulation for?

[jc70100322]

I am familiar with Zynq-based FPGA, Linux Kernel and Python development. Recently, I came across this open-source project and I think its overall structure is very ingeniously designed. I have gained a preliminary understanding of the FPGA and WebServer projects, and have also replicated some experiments. I think this joint simulation experiment is quite interesting. During the operation, I encountered the aforementioned problems.

[coretl]

It was definitely an interesting experiment having a python simulation and VHDL source in step and faithfully accurate for a mostly idle system, but keeping two parallel implementations in sync was too much of a burden. We are currently trying a different approach using a cocotb testbench to run the actual VHDL code, but extracting any counters from it, and winding them forward when the block is idle so we can do a near realtime simulation of a mostly idle system. Progress will be documented in PandABlocks/PandABlocks-FPGA#227

[jc70100322]

OK，Thank you for your sharing.