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No connection to evaluation board after performing TMS570 - cpu-selftest

Marco Techt
Prodigy 110 points

Hi,

actually I'm trying to get the selftest of th tms570 running.

I'd configured the self-test controller and started the test.

After performing the cpu-test I should have disabled it (after reset) - but i haven't done it.

Now I can't connect to my development board anymore.

I'm using IAR Embedded workbench as IDE , J-Link as ICE and mcbtms570 as evaluation board.

I've also tryed to flash the cpu via nowFLAH (ti) - without success.

 

I would be very glad to receive helpfull comments.

  • 0
    TI__Mastermind 30845 points

    Marco,

    Once LBIST or STC is completed a CPU reset is generated as the CPU registers are corrupted and a fresh start is required. As a result of the CPU reset, the JTAG connection is lost. Thus it is important to check for TEST_DONE bit in the STCGSTAT register as part of the start up routine.

    What hardware are you using? If you are using the USB stick, I am afraid the only solution may be to keep reset held and start nowFlash. Once nowFlash attempts to connect, release reset and hope! I have had that problem too and it can take a couple of tries to get the timing right. Unfortunately there may not be a sure shot way of connecting.

    Regards,

    Abhishek

  • 0 in reply to A Arora
    Prodigy 110 points

    Hello Abhisek,

    thank you very much for your response!

    I'm using the evaluation board mcbtms570 from Keil.

    This week I'm not at office any more. Next week I will try to solve the problem with your mentioned solution and post the results I get.

    Best Regards,

    Marco

     

     

  • 0 in reply to Marco Techt
    Prodigy 110 points

    Hello Abhisek,

     

    yesterday I've solved the problem.

    After many tries with my programming tools (J-Link, NowFlash) I was able to reprogramm the board with the NowFlash-tool.

    Now the cpu-self-test is running without disturbing the JTAG-communication.

    Thank you very much for your help!

     

    Best regards

    Marco

  • 0 in reply to Marco Techt
    Intellectual 510 points

    Hi Marco Techt,

    I'm now using the same MCU with you, and i'm implementing cpu selftest(LBIST) now, but i have some unclear items. Can you share your implementing code and debug methods to me? If you have some LBIST related materials, can you share it with me ? i only have the Techinical Reference Manual, thanks very much. My email: fumin.li@siemens.com