AR# 54163

描述

When using the Tri-Mode Ethernet MAC v5.5 example design in Vivado 2012.4 on a Windows machine, the core level XDC file is not properly loaded when opening the implemented design.  

Critical warnings similar to the following are received:

unrecognised command 'current_instance' in core_name.xdc

The XDC constraints are not properly loaded for running Timing Reports.

解决方案

This can be worked around by manually loading the XDC file after the implemented design is opened:

1. Run synthesis.
2. Run implementation.
3. Open the implemented design.
4. Read the XDC file with the following command:
    

read_xdc -cells trimac_fifo_block/trimac_block/inst C:/path_to_project/example_project/core_name_example/core_name_example.srcs/sources_1/ip/core_name/synth/core_name.xdc