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MicroZed Hardware Design USB dongles not enumerating
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Related

USB dongles not enumerating

Former Member
Former Member over 9 years ago

Hi, I am having problems with a couple of WI-FI USB dongles that, when connected to the microzed board running Linux, do not get enumerated (the protocol is stuck very very early in the process).
If I put an hub in between all works fine.
Has anyone experienced anything like this? many other dongles work flawlessly but two of them (D-Link DWA-140 and Edimax EW-7718uN) don't.
Obiously the two dongles work everywhere else.

The same problem replicates on our custom board that was developed as a close copy of the microzed so it must be a design or component problem (phy related?)

Any information would be very much appreciated,
thanks
Jo

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  • Former Member
    0 Former Member over 9 years ago

    Hello Johann,

     

    Could the problem be adequate power for the dongles? I don't know how you are powering your MicroZed but if it is only through the USB input and the hub is powered that might explain what you are observing.

     

    -Gary

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  • Former Member
    0 Former Member over 9 years ago

    Hey Gary.

    I don't think that it could be a power problem, because when the (unpowered) hub is in between, it can easily handle not one, but three dongles, including the mentioned two that without the hub would not work.


    Jo

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  • Former Member
    0 Former Member over 9 years ago

    Hi Johann,

     

    You don't mention what flavor or version of Linux you are using but this forum thread might be useful:

     

    http://zedboard.org/content/microzed-petalinux-20154-kernel-usb-driver-settings

     

    -Gary

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  • Former Member
    0 Former Member over 9 years ago

    The Linux I'm using comes with Yocto Dora and the kernel version is 3.8.11.
    The Xilinx layer comes from github.com/architech-boards/meta-xilinx.git (so it's not Petalinux).

    The problem appears very consistently on the zedboard, microzed and our custom boards even if they are equipped with different PHYs.

    j

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  • Former Member
    0 Former Member over 9 years ago

    If possible, you might want to try the dongles with the Pulsar Linux image certified for the MicroZed board.  You can obtain/download the image from the links in the MicroZed Reference Designs.

    Ron

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