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xc7: linux litex test: remove PCF and SDC and fix XDC constrs

Open acomodi opened this issue 3 years ago • 2 comments

This fixes https://github.com/SymbiFlow/symbiflow-examples/issues/235 and https://github.com/SymbiFlow/symbiflow-examples/issues/234 and supersedes https://github.com/SymbiFlow/symbiflow-examples/pull/236

Signed-off-by: Alessandro Comodi [email protected]

acomodi avatar Jan 05 '22 13:01 acomodi

@mithro At the moment, we need to post-process the XDC generated by LiteX to avoid having unrecognized commands which are not yet implemented in the yosys plugin. Examples of these commands are the set_false_path or set_clock_groups.

IMO we may proceed by merging this PR, so we eliminate the confusion around which constraint file is to be used.

acomodi avatar Jan 10 '22 09:01 acomodi

Please make sure there are bugs logged for each XDC command which doesn't work. My understanding was that we had full support for XDC needed for LiteX.

mithro avatar Jan 10 '22 17:01 mithro