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SC_ERR_PATH_BROKEN-233 error

FENG SUN57683
Intellectual 895 points
Other Parts Discussed in Thread: CCSTUDIO

hi:

       We have a self made dual C6747 board, and a seedxds560 emulator.  The JTAG chain worked fine for quite a few days but now the CCS4.1.3  is not able to connect to the board any more, although nothing was changed.

       the  SC_ERR_PATH_BROKEN-233 error repeats to show. we have

       1.  rebulid the driver for the seedxds560 emulator for CCS4

       2. test another board (same layout)

       but the same broblem repeats.

       we have measured  the TDO pin, when the jtag head was not connceted to the board, is 0v ; after we connected the emulator , it seems the votage lever was 1.7V;

when we tried to connect the board, TDI signal varied from 0 to 3.3V, but the TDO varied just form 1.7 to 3.3V.   is that ok?

        The TDI is 3.3V, TCK is 500KHZ.

      

      Can any one help? thanks a lot!

  • 0
    Intellectual 895 points

    BTW, when we run dbgjtag.exe in the cmd window,  like

    C:\CCStudio_v3.3\cc\bin>dbgjtag -f brddat\ccbrd0.dat -v -S brokenpath

    we get


    -----[An error has occurred and this utility has aborted]--------------------

    This error is generated by TI's USCIF driver.

    The value is '-233' (0xffffff17).
    The title is 'SC_ERR_PATH_BROKEN'.

    The explanation is:
    The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.
    An attempt to scan the JTAG scan-path has failed.
    The target's JTAG scan-path appears to be broken
    with a stuck-at-ones or stuck-at-zero fault.

    But if we do not plug the jtag head into the connector on the board, we get

    -----[An error has occurred and this utility has aborted]--------------------

    This error is generated by TI's USCIF driver.

    The value is '-183' (0xffffff49).
    The title is 'SC_ERR_CTL_CBL_BREAK_FAR'.

    The explanation is:
    The controller has detected a cable break far-from itself.
    The user must connect the cable/pod to the target.

    dose that mean that the JTAG emulator is ok but the C6747 is not work now?

  • 0
    Intellectual 895 points

    turns out the DSP is broken, just as SC_ERR_PATH_BROKEN-233  indicates.

  • 0 in reply to FENG SUN57683
    TI__Mastermind 37915 points

    Hi Feng,

    How did you resolve this -233 issue when connecting to emulator?I have the same issue now anc don't know how to fix it,thanks a lot.

    Tiger

  • 0 in reply to Dale Li
    Intellectual 895 points

    Just  a s what I said above, after a long testing process, we made the conclusion that at least one of the DSPs on the JTAG chain was broken (maybe both of them). so we had nothing to do but to replace both of the DSPs, and that really works.

    We think the DSP was destroied by improper operation, that is, pulling out and pluging in the emulator while the power is still on. This is a very good lesson to us.

    hope this can help.