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CCS/TMDSEMU110-U: Cannot debug Hercules RM57 Launchpad with XDS110 Probe

surialic
Prodigy 160 points
Part Number: TMDSEMU110-U

Tool/software: Code Composer Studio

Hello,

I'm trying to debug my Hercules RM57 Launchpad using the XDS110 Debug Probe. When testing the connection, I receive the following error:

"The value is '-267' (0xfffffef5).
The title is 'SC_ERR_XDS110_TARGET_SUPPLY'.

The explanation is:
The controller could not detect valid target supply. Check target
JTAG connection and/or connection setting specifying voltage level."

I have been able to successfully debug using the internal Hercules debugger. I verified that the TVRef pin was at 3.3V voltage and ran the xdsdfu tool to see if the XDS110 probe was found (which it was).

We also verified the Launchpad schematic against the XDS110 User manual and we found what we believe to be a pin mismatch.

- Launchpad Schematic:

 

- XDS110 User Guide:

In the user Guide, pin #8 is connected to ground but in the Schematic it seems to be connected to the external debugger. Please kindly advice what could be wrong.

Thank you.

  • 0
    TI__Guru**** 196776 points
    Hi Surialic,

    The pin 8 of J18 on the Launchpad is used by TM4C129 device. The TM4C129 uses this signal to decide which emulator is used. If this signal is pulled low, the external emulator is used; otherwise, the internal XDS110 is used. This signal should not affect the connection of your external emulator.
  • 0 in reply to QJ Wang
    Prodigy 160 points
    QJ Wang,

    Thanks for your promptly reply. The information you provided was helpful but we are still not able to debug the Launchpad. We are using the 20-pin to ARM Cortex 20-pin converter adapter.

    We still keep getting the same message:

    "The value is '-267' (0xfffffef5).
    The title is 'SC_ERR_XDS110_TARGET_SUPPLY'.

    The explanation is:
    The controller could not detect valid target supply. Check target
    JTAG connection and/or connection setting specifying voltage level."

    Thanks.
  • 0 in reply to surialic
    TI__Guru**** 196776 points
    Hi Surialic,

    Are both external emulator and mini USB cable connected? I want to make sure the board is powered properly. Are you able to use the internal XDS110 emulator when the external one is plugged onto the J18 connector (it is not populated at default)?
  • 0 in reply to QJ Wang
    Prodigy 160 points
    QJ Wang,

    Yes, both external emulator and miniUSB cables are connected. The first time I connected the external one it asked me to choose a serial number (00000000 or HLR57L00) and I chose 00000000. Now every time I connect the external probe it defaults to that one and I am not able to debug using the internal one.

    Thanks.
  • 0 in reply to surialic
    TI__Guru**** 196776 points
    Hi Surialic,

    Have you solved the problem?
  • 0 in reply to QJ Wang
    Prodigy 160 points
    Hello QJ Wang,

    The problem was that I needed to use the 14 pin header instead of the 20 pin one. It was not so easy since I had to get jumpers soldered into the board with little space between them but it did resolve the problem.

    Thanks for your help.

    Regards,

    Surialic