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AR# 24911

Platform Cable USB - When using Platform USB cable, error occurs: "INFO: write cmdbuffer failed 20000015"

Description

Keywords: analyzer, DLC9, EDK

When using the Xilinx Platform USB cable with ChipScope Analyzer 9.1.01, or 9.1.02 iMPACT, or XMD, the following error occurs:

"INFO: write cmdbuffer failed 20000015"

The error is caused when Xilinx design tools are unable to perform the mandatory CPLD update on the Xilinx Platform USB cable.

Solution

1

You can use one of the following methods to work around this issue:

iMPACT is Installed

1. Unplug the Xilinx Platform USB cable from the computer and plug it back in.
2. Run iMPACT.
3. Open the Xilinx Platform USB cable by double-clicking Boundary Scan on the list to the left.
4. Right-click on the main window, choose Cable Setup, choose Xilinx USB Cable, and press OK.
5. A dialog box should appear stating that a firmware update will be performed on the cable; press OK.
6. After this is complete, ChipScope can be used again with the Xilinx Platform USB cable.

ChipScope 9.1.02 is Installed

1. Download the following tcl script:
http://www.xilinx.com/txpatches/pub/swhelp/ise9_updates/cpld_update_fix.zip
2. Put it in <ChipScope Installation>/bin/<platform>. (The default <ChipScope Installation> is C:\Xilinx\ChipScope_Pro_9_1i\bin\nt on Windows).
3. From a command line, go to the <ChipScope Installation>/bin/<platform> directory.
4. Run:
cs_xtclsh cpld_update_fix.tcl
5. A message is displayed indicating that the Platform USB cable requires a firmware update. After the message "Cable closed successfully" appears, ChipScope can be used with the Xilinx Platform USB Cable.

NOTE: This issue is fixed in the upcoming 9.1.03 release and will not require a work-around to perform a CPLD update on the Xilinx Platform USB cable.

XMD is Installed

This can be due to a conflict with a jtagserver driver. Disable the jtagserver and windriver drivers and force the USB cable driver reinstallation as follows:

Browse to %Xilinx%/bin/nt directory in a command prompt and enter the following:

wdreg -inf .\windrvr6.inf install

wdreg -inf .\xusbdrvr.inf install


2

Error Occurs Using EDK FlashWriter

You can solve this issue by running FlashWriter using the following command line:

xmd -tcl flashwriter.tcl


AR# 24911
Date Created 09/04/2007
Last Updated 12/16/2008
Status Active
Type General Article