AR# 54697

Vivado- CRITICAL WARNING: [Constraints 18-76] The AREA GROUP attribute 'GROUP' is not supported in this version of software

Description

I am trying to create a pblock with the constraints:

create_pblock test
add_cells_to_pblock [get_pblocks test] [get_cells [list sb]]
resize_pblock [get_pblocks test] -add {SLICE_X20Y50:SLICE_X30Y60}
set_property GROUP {CLOSED} [get_pblocks test]
set_property PLACE {CLOSED} [get_pblocks test]

Vivado tool gives the following message:

CRITICAL WARNING: [Constraints 18-76] The AREA GROUP attribute 'GROUP' is not supported in this version of software. There does not exist an XDC equivalent. It will not be converted.

Solution

The message is valid. The GROUP is allowed in PlanAhead tool but not in Vivado Design Suite.

The equivalent constraint in Vivado tool to close the pblock is: set_property EXCLUDE_PLACEMENT 1 [get_pblocks test]

Note that this only closes the pblock's sites. Outside logic can still use routing resources. We do not yet have EXCLUDE_ROUTING. We do have CONTAIN_ROUTING to keep the routing of the Pblock within its sites.

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AR# 54697
Date	04/05/2013
Status	Archive
Type	General Article
Tools	Vivado Design Suite

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