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Original question:

DLPLCR4500EVM: USB connection issue

DLPLCR4500EVM: EVM doesn't connect via USB

Gabriel Moreau
Prodigy 10 points
Part Number: DLPLCR4500EVM


Tool/software:

Hello,

I am trying to connect to a lightcrafter 4500 EVM via USB. I've installed the lightcrafter GUI but the "connected" light remains red. I've tried 3 different cables and computers, each time the device manager does not update when I unplug/replug the USB cable, does this indicate the USB interface is defective?

Thanks,

Gabriel

  • 0
    TI__Guru 54705 points

    Hello Gabriel,

    There are several possibilities:

    • If this connected previously to a different system, but will not connect to this system it is possible that older drivers are missing in a newer environment (i.e.  Win 11).
    • The FW/bootloader has become corrupted.  
    • The USB interface is defective.

    Could you give a brief rundown of the provenance of this EVM?

    Fizix

  • 0 in reply to Fizix
    Prodigy 10 points

    Hi Fizix,

    This is a brand new EVM (unpacked yesterday). It boots up and displays the demo screen fine but I haven't yet been able to get it to connect to any PC via USB.

    Thanks,

    Gabriel

  • 0 in reply to Gabriel Moreau
    TI__Guru 54705 points

    Hello Gabriel,

    Thank you for letting us know. 

    Here are some questions:

    • What OS are you using?  
    • When you plugged the USB in, did the system indicate that a device was detected?
    • In device manager, is there a device with an error beside it?

    Fizix

  • 0 in reply to Fizix
    Prodigy 10 points

    Hi Fizix,

    I have tried a windows 10 machine, a windows 11 machine running on parallels, and a macOS machine. In all 3 cases there is no indication that the device is detected (no pop up, no peripheral devices under "This PC" on the windows machines, and no change to the device manager). 

    There are no devices with an error beside it in device manager, suspiciously, the device manager doesn't update when I unplug/replug the USB cable from the PC, as if the change isn't being registered by the PC at all. I've tried both available usb ports on the PC. I also tried adjusting the mini-usb end of the cable while the cable is plugged in to the PC to check it wasn't just a bad connection.

    Is there a way to update the firmware without the USB connection? Are there any switch or jumper states that could lead to such issues?

    Thanks,

    Gabriel

  • 0 in reply to Gabriel Moreau
    Prodigy 10 points

    I just tried plugging in a different device using the same mini-usb cable/pc combination and in that case the PC makes a sound when I plug/unplug the cable and the device manager refreshes as well. Still no luck with the EVM unfortunately.

  • 0 in reply to Gabriel Moreau
    TI__Guru 54705 points

    Gabriel,

    I am going to send a friend invite so you can get the purchase information to me.

    Fizix

  • 0 in reply to Fizix
    TI__Guru 54705 points

    Hello again Gabriel,

    Also please make sure that J23 is NOT populated.

    Fizix

  • 0 in reply to Fizix
    TI__Guru 54705 points

    Gabriel,

    Since we took this offline, I am going to mark this public thread as complete.

    Fizix