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# 45851

CORE Generator - Error not flagged for FIR v6.2 when coefficient is not negative-symetric

Description

In ISE Design Suite 13.x and 14.x, when customizing the FIR v6.2 block, if the user has a coefficient vector that is not negative-symmetric and if they choose Implementation -> Coeff Structure=negative-symmetric, an error appears.

However, in ISE Design Suite 13.2 and later, this error does not pop up anymore. I am incorrectly allowed to save my module that has non negative-symmetric coefficients.

Other coefficient DRCs are still present.

Solution

If the CORE Generator software is run in debug mode (-d option), the following message is generated:

DEBUG [ipmodel] - Parameter Coefficient_Structure was detected to be invalid while updating Coefficient Vector. Issue: Coefficients provided do not match
coefficient structure 'Negative Symmetric'

However, the pop-up window is no longer present for FIR v6.2.

NOTE: The DRC pop-up is displayed for the FIFO v6.1 IP.

AR# 45851
Date Created 01/16/2012
Last Updated 06/24/2013
Status Active
Type Known Issues
Tools
  • ISE Design Suite - 13.2
  • ISE Design Suite - 13.3
  • ISE Design Suite - 13.4
  • ISE Design Suite - 14.1