2. Support
  3. AR# 3888: 12.1 Timing Closure - How does Timing Analyzer list the number of timing errors?
  4. AR# 38886: Spartan-6 FPGA Integrated Block for PCI Express -WARNING:XdmHelpers:376 - Unexpected value of "1'b0" found for attribute GTP_SEL

AR# 38886

Spartan-6 FPGA Integrated Block for PCI Express -WARNING:XdmHelpers:376 - Unexpected value of "1'b0" found for attribute GTP_SEL

Description

Version Found: 1.1; v2.1
Version Resolved and other Known Issues: See (Xilinx Answer 45702).

When implementingthe Spartan-6 FPGA Integrated Block Wrapper for the PCI Express design example, NGDBUILD gives the following warnings:

"WARNING:XdmHelpers:376 - Unexpected value of "1'b0" found for attribute GTP_SEL. Unable to convert this to the expected numeric value.
WARNING:XdmHelpers:376 - Unexpected value of "1'b0" found for attribute GTP_SEL. Unable to convert this to the expected numeric value.
WARNING:NgdBuild:1403 - edif property 'GTP_SEL' of type 'string' on object 'PCIE_A1' is being ignored. It is recognized property but does not have the expected type of 'integer'."

These messages appear onlywhen using Synplify to synthesize a Verilog design.

Solution

To work around this issue, in the generated core's source directory edit the file with the same name as the generated coreandmake following modification. For example, if the CORE Generator default name is used, the file would be called s6_pcie_v2_3.v.

Change:

parameter [2:0] PM_CAP_AUXCURRENT= 3'd0

to

parameter PM_CAP_AUXCURRENT = 0

These warnings do not occur when using XST or Synplify with a VHDL design.

Revision History:
01/18/2012 - Updated; added reference to 45072
07/06/2011 - Initial Release

Note: "Version Found" refers to the version the problem was first discovered. The problem might also exist in earlier versions, but no specific testing has been performed to verify earlier versions.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
42569 Spartan-6 FPGA Integrated Block Wrapper for PCI Express (AXI) - Resolved issues in v2.3 N/A N/A

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
45702 Spartan-6 FPGA Integrated Block for PCI Express - Release Notes and Known Issues for all AXI Interface versions N/A N/A
AR# 38886
Date 12/15/2012
Status Active
Type General Article
IP