`design.getBELAttrs()` returns None

[dg-deus]

To work with RapidWright design pacakges in python, I implemented a simple mux, and placed it in a single site. Then I created dcp file of it with the corresponding edif file as you can find in the attachments. mux16.zip

Then, I loaded it to test design pacakges like the below. At this time, I wanted to query properties of used BELs (not Cells) in the site.

import jpype.imports
jpype.startJVM(classpath=["rapidwright-2023.2.1-standalone-win64.jar"])
RwDesign = Design.readCheckpoint('mux16.dcp', 'mux16.edif')
for RwSite, RwSiteConfig in RwDesign.getBELAttrs().items():
    print(f"{RwSite}, {RwSiteConfig}")

However, RwDesign.getBELAttrs() returns None. How can I access BEL properties(attributes) used in the netlist of given checkpoint file?

Thank you in advance.

[clavin-xlnx]

The SiteConfig and BELAttr objects are to support representation in the Versal device series,. The DCP that you have provided targets a Series 7 device, so these constructs are not used (see discussion here: https://github.com/Xilinx/RapidWright/discussions/598).

Can you describe some of the specific attributes you are looking for? Most configuration exists on the Cell and/or SiteInst objects, so those are the likely candidates to query.

[dg-deus]

I want to query configuration options of BELs used to implement the given properties of Cells in netlist.

[clavin-xlnx]

I want to query configuration options of BELs used to implement the given properties of Cells in netlist.

Unfortunately, there is not a comprehensive list of these properties, they mostly need to be queried or computed adhoc.