I’m trying to access the loaded overlay from multiple python interpreters while writing a package and can’t get a proof of concept to work in a root ipython interpreter. I know this is possible as running to notebooks and downloading an overlay in one will clearly affect what is available in the oth…

Hi, What pynq version are you using? In 2.7 I was able to do this using this piece of code import pynq ol = pynq.Overlay(<your_overlay>.bit, download=False) pynq.Device.active_device.reset(ol.parser, ol.timestamp, ol.bitfile_name) Mario

We were on 2.6 on this board (ZCU111). On a possibly related note we were finding a difference in the list of devices available. In the script this code: def configure(bitstream, mig='mig_modified_ip_layout_mem_topology.xclbin', ignore_version=False, clocks=False, download=True): import pynq, x…

@marioruiz any chance you know of a workaround for 2.6 or have any other thoughts?

Hi, Mario gave you the solution. Have only one python process, the first one to start, when you invoke Overlay(…) set download=True. Have all the others set it to download=False. Then of course don’t access the same PL entities/registers at once for hardware that can’t tolerate it. This works i…

That isn’t my experience. I’ve now updated to pynq 2.7 and of a fresh sd image do the following: ssh in sudo ipython import pynq pynq.Overlay(path_to_my_bitstream, download=False) This results in RuntimeError: No Devices Found as does executing the command with download=True I do get the warni…

PYNQ uses the fpga_manager to download bitstreams, so you need to run as root or with root permissions to be able to download the bitstream. Additionally, in the PYNQ SD card image 2.7, the pynq package is installed in a virtual environment. So, you need to source the environment first (for regular …

Right, and I see that scripts to do that are in profile.d, but are all of those needed? Mainly I want to make sure that I’m sourcing neither too few nor too many for the systemd root services I’m planning to spin up. As for it being sourced automatically, I’m not clear what you mean. Running su in …

@marioruiz Is there documentation on properly sourcing the pynq2.7 venv, especially for a given board, I’m not seeing any in the docs? It looks like pointing pycharm at /usr/local/share/pynq-venv/bin/python for a remote ssh interpreter works well as does source /etc/profile.d/pynq-venv.sh in an ssh…

Hi @baileyji , Generally what I do when using pynq over an ssh connection is add source /etc/profile.d/pynq-venv.sh to the end of my /root/.bashrc file. Have you tried this on your target board? Then when a root shell opens it will source everything for the environment. You could also try just inclu…

Could you possibly load your Overlay using boot.py which gets executed as part of startup? Then have your other future ipython sessions use the download=False option? There are some details in another thread here: [image] Boot.py to download different bitstream Support F…

Accessing an overlay from multiple python interpreters

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Accessing an overlay from multiple python interpreters

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