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AR# 21881

7.1i EDK - "ERROR:Bitgen:42 - Unknown setting "4" for option "ConfigRate"."

Description

Keywords: BitGen, base, system, builder, BSB, Spartan-3

Urgency: Standard

General Description:
When I target my embedded project to a Spartan-3E FPGA, the following error occurs during bitstream creation:

"ERROR:Bitgen:42 - Unknown setting "4" for option "ConfigRate". Please consult
the "BitGen" Section in Chapter Twelve of the Development System Reference
Guide for the appropriate command-line options to create a bitstream file or
consult the "Implementation Options" Section of the Design Manager/Flow
Engine Reference/User Guide for Configuration Template Settings.
make: *** [implementation/system.bit] Error 1
Done."

Solution

XPS is creating an invalid BitGen options file. Valid options for the "ConfigRate" are 6, 3, 12, 25, 50, 100, with the default being 6. To work around this problem:

- Double-click on the "bitgen.ut" file under the Project Files hierarchy, located in the System tab in XPS
- Change the ConfigRate setting from 4 to 6
- Save and close the "bitgen.ut" file
AR# 21881
Date Created 08/08/2005
Last Updated 04/16/2007
Status Archive
Type General Article