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DLPLCRC900DEVM: DLPLCRC900DEVM and DLPLCR90EVM Cannot Connect to GUI

TI-CSC
Genius 12965 points
Part Number: DLPLCRC900DEVM
Other Parts Discussed in Thread: DLPLCR90EVM

Tool/software:

Hello E2E Experts,

Good day.

Our lab has been used DLPLCRC900DEVM and DLPLCR90EVM pair. However, suddenly the Lightcrafter9000 shows disconnected status from few days ago.
What I tried so far is switching cables and PC, J11 capping for bootloader, reinstalling SW and FW.
Mainboard has a good heart beat flashing, and display board shows default pattern when powered on.
The screenshot image of the lightcrafter9000 status display is attached here. 
Could you please diagnose the problems? 
 
Regards,
TICSC
  • 0
    TI__Guru 54540 points

    Hello Jonard,

    Have they restarted the host computer, or another USB cable?  That is the first place to start.

    Fizix

  • 0 in reply to Fizix
    TI__Genius 12965 points

    Hello Fizix,

    Good day.

    Yes, have tried restarting the host computer and changing USB cable.

    Any other advise for us?

    Regards,

    TICSC

  • 0 in reply to TI-CSC
    TI__Guru 54540 points

    Hello TI-CSC,

    Since you were able to reprogram by putting the bootHOLD jumper on, then it must be showing "connected" for the reprogramming to work.

    Now try the boothold jumper again except this time set the firmware page as follows:

    Complete image and do NOT skip the bootloader area.

    Fizix

  • 0 in reply to Fizix
    TI__Genius 12965 points

    Hello Fizix,

    Good day.

    I’d like to clarify what I’ve done and what I’m seeing now:

    • Previously, setting the BootHOLD jumper on J11 allowed me to reprogram the board without issues.

    • Suddenly, the system began reporting “Disconnected,” despite power and USB being connected.

    • I tried the BootHOLD procedure again—jumper on J11 → power cycle → connect USB → upload firmware—if this procedure including uploading firmware is the correct procedure of bootHOLD jumper.

    Could you confirm whether my understanding of the BootHOLD reprogramming flow is correct? If it is, what’s the likelihood that the USB port or related components have failed?

    Regards,

    TICSC

  • 0 in reply to TI-CSC
    TI__Guru 54540 points

    Hello TICSC,

    If the system no longer shows connected when the BootHOLD jumper is on then the FW will have to be loaded via JTAG.  This usually indicates that the bootloader has somehow become corrupted.  Please refer to the DLPU102 [https://www.ti.com/lit/ug/dlpu102/dlpu102.pdf] section 4.12 JTAG Flash Programming.

    You will need to obtain the FTDI USB to JTAG chip and make the programming cable as described there.  Follow the instructions in the guide.

    Fizix