UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 55226

LogiCORE XAUI v11.0 - Vivado - Critical Warning - No cells match DRP path for false path constraint

Description

When using the XAUI v11.0 core with the following Variants:

- 10G or 20G rate for Artix-7 devices
- 10G rate for Virtex-7 devices using GTH Transceivers

Critical Warnings such as the following are seen:

[Vivado 12-180] No cells matched 'get_cells -hierarchical -filter {NAME =~ */gt_wrapper_i/gt0_core_gt_wrapper_i/gtrxreset_seq_i/DRP_OP_DONE_reg}'. ["/example_project/core_xaui_example/core
e_example.srcs/sources_1/ip/core_name/synth/core_name.xdc":17]

Solution

To properly constraint these paths, the word "core" in the path should be replaced with the component name that the XAUI core was generated with in /sources_1/ip/core_name/synth/core_name.xdc.  

This file is read only, but can be edited outside of the Vivado GUI. 

In the following constraints "core" should be replaced with the name of the core as shown below:

set_false_path -to [get_cells -hierarchical -filter {NAME =~ */gt0_core_name_gt_wrapper_i/gtrxreset_seq_i/gtrxreset_s_reg}]
set_false_path -to [get_cells -hierarchical -filter {NAME =~ */gt_wrapper_i/gt0_core_name_gt_wrapper_i/gtrxreset_seq_i/DRP_OP_DONE_reg}]
set_false_path -to [get_cells -hierarchical -filter {NAME =~ */gt_wrapper_i/gt1_core_name_gt_wrapper_i/gtrxreset_seq_i/DRP_OP_DONE_reg}]
set_false_path -to [get_cells -hierarchical -filter {NAME =~ */gt_wrapper_i/gt2_core_name_gt_wrapper_i/gtrxreset_seq_i/DRP_OP_DONE_reg}]
set_false_path -to [get_cells -hierarchical -filter {NAME =~ */gt_wrapper_i/gt3_core_name_gt_wrapper_i/gtrxreset_seq_i/DRP_OP_DONE_reg}]



These constraints could also be added to the design top level to constrain the path, although the critical warning will still be reported if the core specific xdc is not edited.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
54666 LogiCORE IP XAUI - Release Notes and Known Issues for Vivado 2013.1 and newer tool versions N/A N/A
AR# 55226
Date Created 03/28/2013
Last Updated 09/22/2014
Status Active
Type General Article
IP
  • XAUI