Not able to find the Core using JLink

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  • Not able to find the Core using JLink

    Hallo,

    I am using segger Jlink with Fujitsu MB9DF126.
    The following message is displayed when we click the "J-Link ARM V4.50k"

    SEGGER J-Link Commander V4.50k ('?' for help)
    Compiled Jul 2 2012 16:03:36
    DLL version V4.50k, compiled Jul 2 2012 16:03:19
    Firmware: J-Link ARM V8 compiled Jun 19 2012 11:29:30
    Hardware: V8.00
    S/N: 58007830
    VTarget = 3.261V
    Info: TotalIRLen = 4, IRPrint = 0x01

    ****** Error: Bad JTAG communication: Write to IR: Expected 0x1, got 0x0 (TAP Co
    mmand : 10) @ Off 0x3E.
    Bad JTAG communication: Write to IR: Expected 0x1, got 0x0 (TAP Command : 10) @
    Off 0x5.
    Could not power up debug port: Control/Status register reads 00000000
    No devices found on JTAG chain. Trying to find device on SWD.
    No device found on SWD.
    Did not find any core.
    Info: TotalIRLen = ?, IRPrint = 0x..FFFFFFFFFFFFFFF050520001
    Info: TotalIRLen = ?, IRPrint = 0x..FFFFFFFFFFFFFFF052570000
    No devices found on JTAG chain. Trying to find device on SWD.
    No device found on SWD.
    Did not find any core.
    J-Link>

    When the reset target command - r was entered it displays the following

    J-Link>r
    Info: TotalIRLen = 4, IRPrint = 0x01
    Reset delay: 0 ms
    Reset type UNKNOWN: ???
    Info: TotalIRLen = 4, IRPrint = 0x01
    Info: TotalIRLen = 4, IRPrint = 0x01
    Info: TotalIRLen = 4, IRPrint = 0x01

    WARNING: CPU not halted after Reset, halting using Halt request

    ****** Error: Bad JTAG communication: Write to IR: Expected 0x1, got 0x0 (TAP Co
    mmand : 10) @ Off 0x3E.
    Bad JTAG communication: Write to IR: Expected 0x1, got 0x0 (TAP Command : 10) @
    Off 0x5.
    No APB-AP found.
    Bad JTAG communication: Write to IR: Expected 0x1, got 0x0 (TAP Command : 14) @
    Off 0x5.
    JTAG Id mismatch. Expected: 0x0BA00000, found: 0x00000000)
    J-Link>

    We could not erase the chip from "J-Flash ARM V4.50k" too.

    Can you please provide some hints to correct this error.

    Thanks in advance.

  • Hi,

    The Fujitsu MB9DF126 (Atlas) device is a Cortex-R4 device which needs special handling and needs a so-called J-Link Script File (do not confuse with files to be used when using J-Link Commander in script mode).
    Please see UM08001 (J-Link User Guide), chapter 5.10 for more information about J-Link script files.

    To the best of my knowledge, Fujitsu has created and provides the J-Link script file for this device.
    I suggest you get in touch with Fujitsu regarding this.


    Best regards
    Alex
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