Answers Database

FPGA Express 1.2: Optimization FE-PADMAP-3 error


Record #3296

Product Family:  Software

Product Line:  Synopsys

Problem Title:
FPGA Express 1.2: Optimization FE-PADMAP-3 error


Problem Description:
Keywords: FPGA Express, optimize, pad, port, bidirectional, FE-PADMAP-3

Urgency: Standard

General Description:
When trying to optimize a design in FPGA Express, an error message occurs:
"Pad mapping optimization cannot determine the type of pad to insert at the
ports <path of signal name>. Please see the extended error message for more deta
ils."

The pad mapping optimization program cannot determine the type of pad to be
inserted at a port, usually a bidirectional port. FPGA Express 1.2 does not
know how to deal with bidirectional ports.


Solution 1:

If the port declared as INOUT is not used as a Bidirectional I/O, this error
will still occur.

Make sure that the port declaration matches the functionality.	Also, if the
port is unused, comment out the declaration to avoid this error.



Solution 2:

Open the design implementation box (double-click on '<filename>-0-optimized.').

Select the 'Ports' tab. Under the "direction" heading, there are 3 options:
input, output, and inout.

For all of the "inout" ports, double-click the cell in the "pad" column to
open the "define pad" dialog box. Select "pad0".

For more info regarding the FE-PADMAP-3 error, refer to the Express Help files.

This problem has been fixed with FPGA Express 2.0.2.



End of Record #3296