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RVI ICE box can't connect to target.

Xuewen He
Note: This was originally posted on 25th August 2010 at http://forums.arm.com

As we know, JTAG connect target by TDI/TMS/TCK/TDO/nTRST pin in general.
Now I try ICE box to connect target failed, but TDI/TMS/TCK/TDO/nTRST pin is fine because I can connect target successfully by JLink.
So I want to know whether other pins of JTAG cable port cause connection failed? In my board, the pins 11/17/19/2 are floating. They are RTCK/DBGRQ/DBGACK/Vsupply.

And how will I modify the board to let ice box work well?

Any comment will be great appreciated.
Xuewen
  • Note: This was originally posted on 25th August 2010 at http://forums.arm.com

    Thank you, Joseph,

    But I am using cortex-M3; both JTAG and SWD work well with IAR/J-Link, but still fail by ICE box.

    Now the configuration of JTAG port is following:

    1 VTref  ---- VCC
    3 nTRST ---- pull-up
    5 TDI  ---- pull-up
    7 TMS ---- pull-up
    [color="#FF0000"]9 TCK ---- pull-up (also tried pull-down)
    11 RTCK ---- floating ( tried to connect with TCK)[/color]
    13 TDO ---- no pull-up or pull-down
    15 nSRST ---- pull-up
    [color="#FF0000"]17 DBGRQ ---- floating
    19 DBGACK ---- floating[/color]

    2 Vsupply ---- pull-up to VCC
    4,6,8,10,12,14,16,18,20 ---- GND

    Do you think whether something wrong with the set of JTAG port?

    Best Regards.

    Xuewen
  • Note: This was originally posted on 26th August 2010 at http://forums.arm.com

    Hi Joseph,

    The version of RealView Debugger is 3.1, and have updated the firmware. I can connect successfully to ARM cortex-M3 stardard board SMT32, so I think the box and firmware should be OK.

    Regarding the fault,
    1. sometimes, when I double kick the selection of usb ice box, it said "no connection to target".
    2. if 1 is ok, but set a jtag speed is 100K and run Auto Configure Scan Chain, it will fail.

    But the connection is fine. I try it ok by J-Link.
    I ever thought the ICE box was bad, but it still can connect SMT32 successfully.

    Thank you very much.

    Xuewen
  • Arm Employee Badge
    Note: This was originally posted on 26th August 2010 at http://forums.arm.com

    Did the auto detect in RealView Debugger detect the JTAG chain at all?
    Which version of RealView Debugger are you using? (I think it need to be version 3.1 or later)
    Has the RV-ICE firmware been updated?

    regards,
    Joseph
  • Arm Employee Badge
    Note: This was originally posted on 26th August 2010 at http://forums.arm.com

    It might be that the signal level of the TDO is too low for RealView-ICE.

    See [url="http://infocenter.arm.com/help/topic/com.arm.doc.dui0517a/Babgcibd.html"]http://infocenter.arm.com/help/topic/com.a...a/Babgcibd.html[/url]

    Do you have access to a LVDS Probe v2?

    Joseph
  • Arm Employee Badge
    Note: This was originally posted on 25th August 2010 at http://forums.arm.com

    You might need to try to lower the operation frequency of the TCK. 1 MHz perhaps. This is configurable in the connection settings.

    You can also try connect RTCK to TCK, pin 2 to VCC.

    Another possible issue is the voltage level.

    If you are using Cortex-M0, please check if the chip support JTAG. Some Cortex-M0 microcontrollers support Serial-Wire protocol only.  When using JLink, it might be connecting using serial wire protocol rather than JTAG.  With RV-ICE, connecting using Serial wire requires the use the the LVDS probe v2.

    regards,
    Joseph