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Avnet Boards General USB UART doesn't enumerate
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Related

USB UART doesn't enumerate

Former Member
Former Member over 12 years ago

I've just received my ZedBoard, and have followed the 'getting started' instructions.

The Cypress USB-to-UART driver installed correctly, but most of the time I do not get an enumerated COM port. Very occasionally, after multiple power cycles, I can eventually get it to enumerate and give me COM4, after which I can successfully use Tera Term to talk to the board.

Does anyone have a suggestion as to what the problem is here? I can only imagine that this is a faulty board. I've tried on two different PCs, and have the same behaviour.

The board always appears to boot, and I get the 'Digilent' logo appearing on the LCD display, but most of the time the USB UART does not enumerate and give me a COM port.

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  • bhfletcher
    0 bhfletcher over 12 years ago

    If you leave the terminal open to a previous successful open COM, then it will block that COM. If you can, please find a different cable and try it because it could be a bad cable. Otherwise, I think you are looking at a faulty board, and you would need to request an RMA from wherever you bought the board.

    Bryan

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  • Former Member
    0 Former Member over 12 years ago

    Thanks Bryan, it turned out to be a bad cable in the end. Swapped the cable, and all seems to be working fine.

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