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LAUNCHXL-F280049C: Used as standalone XDS110 to program legacy C2000

Wayne Huang
Genius 16355 points
Part Number: LAUNCHXL-F280049C

Dear Champs,

I am asking this for our customer.

Because standalone XDS110 TMDSEMU110-U is out of stock sometimes and standalone XDS200 is expensive, we suggest using the XDS110 brought out on J102 of F280049/F280025 Launchpad to program legacy F2802x/3x/6x/7x, which has 5-pin JTAG.

Connections as below:

// F280049 Launchpad  to           user's board

RESET_OUT                      to           nTRST

TMS                                   to           TMS

TDI                                     to           TDI

TDO                                   to           TDO

3.3V                                   to           3.3V

GND                                   to           DGND

Remove all shunts/jumpers on J101

CCS uses default XDS110 setting (not 2-pin cJTAG).

Because the user could not succeed in connecting it, we want to confirm if there is anything wrong above.

Wayne Huang

  • 0
    TI__Guru* 80470 points

     Wayne,

    Can you confirm that the setting for the XDS110 is "JTAG(1149.1), SWD and cJTAG are disabled"

    I would also try not connecting the 3.3V volt signal across the boards.  I don't think this is the traditional PD(power detect), but an option to source 3.3V from the USB of the XDS110/LP to the target.  Perhaps there is contention if the boards due to this.

    If the above does not work, can you ask the customer to report back the error that CCS gives when they try and connect?

    Best,

    Matthew

  • 0 in reply to MatthewPate
    TI__Genius 16355 points

    Dear Matt,

    Yes, the setting was  "JTAG(1149.1), SWD and cJTAG are disabled" by default.

    They just used the target configuration setting by default after choosing F28069 and XDS110, without changing any other setting.

    They also tried to use DC source for 3.3V rather than from F280049 Launchpad, but the result was same.

    Below is the fail report from CCS when they verified JTAG connection.

    Wayne 

  • +1 in reply to Wayne Huang
    TI__Guru* 80470 points

    Wayne,

    I'd like to try something a bit different.  Have the customer dis-connect both the 3.3V and the RESET_OUT signals from the Launch pad to the target.

    Can they manually pull TRSTn high at the C2000 target using a jumper wire, or other connection, then try to connect via CCS.  We're trying to see if Reset_out is not TRSTn equivalent in this case.

    Best,

    Matthew

  • +1 in reply to MatthewPate
    TI__Genius 16355 points

    Dear Matt,

    By connecting nTRST to 3.3V directly, we find it works.

    In summary,

    // F280049 Launchpad  to           user's board

    RESET_OUT                      to           ignore

    3.3V                                   to           nTRST

    TMS                                   to           TMS

    TDI                                     to           TDI

    TDO                                   to           TDO

    3.3V                                   to           3.3V

    GND                                   to           DGND

    Remove all shunts/jumpers on J101

    CCS uses default XDS110 setting (not 2-pin cJTAG).

    Thank you.

    Wayne Huang