AR# 71517

CPRI v8.9 - Patch Update for Hard FEC Wrapper latency Issue in Vivado 2018.1

Description

This answer record contains the CPRI patch for CPRI v8.9 rev 0 included in the Vivado 2018.1 release. 

It will no longer be needed in CPRI included in Vivado 2018.3.

Solution

This patch fixes the following CPRI v8.9 issues in Vivado 2018.1:

  1. (Xilinx Answer 71369): Link resyncs every 10ms when IQ RX is loopbacked to IQ TX.

  2. The inconsistent latency through the Hard FEC wrapper part of the IP core.
    The core now provides fixed and variable component parts of the Hard FEC latency.
    Both the fixed and variable latencies are described in the attached document.


Installation:


METHOD 1: (Vivado 2014.4 and later only)

  1. Navigate to the $XILINX_VIVADO/patches directory (Linux) or C:\Xilinx\Vivado\<vivado_version>\patches (Windows) directory (create this directory if it does not exist)
  2. Extract the contents of the ".zip" archive to a directory starting with the name AR71517
    Note: most extraction tools will allow you to automatically create a directory the same name as the zip file
  3. Run Vivado software tools from the original install location.

METHOD 2:

  1. Creating a separate directory containing patched files
  2. Extract the contents of the ".zip" archive to the desired patch directory location.
  3. Set the XILINX_PATH environment variable to point to this patch directory
    i.e. set XILINX_PATH=C:\XILINX_PATH\vivado-patch-AR71517\vivado\
  4. Run Vivado software tools from the original install location.


For a list of known issues for CPRI IP, please refer to (Xilinx Answer 54473)

Attachments

Associated Attachments

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
54473 LogiCORE IP CPRI Core - Release Notes and Known Issues for Vivado 2013.1 and newer tool versions N/A N/A

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
71369 CPRI 8.9 - Link resyncs every 10ms when the IQ RX is looped back to the IQ TX N/A N/A
AR# 71517
Date 09/10/2018
Status Active
Type General Article
IP