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AR# 22819

8.1i iMPACT - Swap bits is always true when generating HEX PROM file

Description

In iMPACT 8.1, when generating generic HEX file format, the "swap bits" function is always enabled regardless of the state of the check box. Even after loading a CDF file with "Swap bits" set to FALSE, the HEX file is generated with swapped bits. The PROM file properties shows the box checked, and unchecking the box has no effect.

Solution

The problem is that the iMPACT GUI or batch mode will not execute the correct PROMGen command line:

promgen -w -p hex -c FF -o output_file.hex -u 0 input_file.bit

promgen -w -p hex -b -c FF -o output_file.hex -u 0 input_file.bit

The PROMGen command line options are explained further in the PROMGen section of the Development System Reference Guide:

http://www.xilinx.com/support/software_manuals.htm

There are two ways to work around this problem:

1. Use iMPACT 7.1.04i

2. Run PROMGen from the command line.

This issue is scheduled to be fixed in ISE 8.2i.

If you need further assistance with this problem, open an online WebCase with Xilinx Customer Support at: http://www.xilinx.com/support/clearexpress/websupport.htm

AR# 22819
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article