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AR# 33510

11.1 ISE - XST does not synthesize/process IP Cores in new default location

Description

As of ISE 11.1, an IP core generated in Project Navigator is stored in a ipcores_dir subdirectory by default.

XST's default behavior is to look for core netlists in the main project directory.

Project Navigator is NOT automatically specifying the XST -sd flag for the generated cores. Thus, XST blackboxes the cores and cannot read them for any kind of preliminary timing data, etc.

Solution

You can work around this issue by manually specifying the Cores Search Directories (-sd flag) under Synthesis Options to tell XST where to find the cores.

This issue is resolved in the ISE 11.3 update.

AR# 33510
Date Created 09/15/2009
Last Updated 12/15/2012
Status Active
Type General Article