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1,421 Views
Registered: ‎05-30-2018

split jtag : NO operation is possible with arm dap

When we are trying to build the sample UART application with the ZCU102 board, we are getting the error as described in the following URL: https://www.xilinx.com/support/answers/58053.html 

We tried the solution provided in Xilinx website but its not working, so please have look at the URL to understand the problem.
We are getting the ERROR message has split jtag : NO operation is possible with arm dap while trying to build the program, even though we are running in Jtag mode.
 

 

 

Prob.JPG
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4 Replies
Xilinx Employee
Xilinx Employee
1,386 Views
Registered: ‎08-25-2010

Re: split jtag : NO operation is possible with arm dap

Hi jharaves@asu.edu

 

Interim Fix mentioned in AR#58053 is working or not?

 

Thanks

Simon

Thanks
Simon
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1,380 Views
Registered: ‎05-30-2018

Re: split jtag : NO operation is possible with arm dap

Hi simon,

 

I tried but it is not working.

 

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Observer 123mutt123
Observer
1,095 Views
Registered: ‎10-08-2018

Re: split jtag : NO operation is possible with arm dap

I have this same problem bringing up the zc706 board. I am running the zc706_bist.bat. The PL from ready_for_download correctly installs the bit as follows

 

****** Xilinx Microprocessor Debugger (XMD) Engine
****** XMD v2015.4 (64-bit)
  **** SW Build 1412921 on Wed Nov 18 09:43:45 MST 2015
    ** Copyright 1986-2015 Xilinx, Inc. All Rights Reserved.

Executing user script : download_bit.tcl
Configuring Device 1 (xc7z045) with Bitstream -- system_wrapper.bit
....................10...................20...................30....................40...................50...................60..
..................70...................80...................90....................Successfully downloaded bit file.

JTAG chain configuration
--------------------------------------------------
Device   ID Code        IR Length    Part Name
 1       23731093           6        xc7z045

 

 but the subsequent attempt to configure the bist_app.elf elicits the following error.

 

****** Xilinx Microprocessor Debugger (XMD) Engine
****** XMD v2015.4 (64-bit)
  **** SW Build 1412921 on Wed Nov 18 09:43:45 MST 2015
    ** Copyright 1986-2015 Xilinx, Inc. All Rights Reserved.

Executing user script : download_elf.tcl

JTAG chain configuration
--------------------------------------------------
Device   ID Code        IR Length    Part Name
 1       23731093           6        xc7z045
Error Executing User Script : download_elf.tcl
Error :: ERROR:
        Could not find a ARM device on the board. Please check if the target is in:
         1. Split JTAG mode - No operations are possible with ARM DAP
         2. Non Jtag bootmode - Bootrom may need time to enable DAP. Please try again

 

Physically the diligent jtag cable is connected to windows machine and the USB is connected to a separate Linux machine. Nothing appears on the serial port so I wonder whether the arm device is correctly initialising?

 

Can anyone help?

 

thanks

Matt

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Xilinx Employee
Xilinx Employee
1,015 Views
Registered: ‎10-11-2011

Re: split jtag : NO operation is possible with arm dap

There's no ARM DAP in the targets which means the bootROM didn't complete execution or the JTAG chain is split (it's one of the boot mode pins). On a  ZCU106 I would suggest to double check the boot modes and be sure you are in JTAG with cascade configuration.

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