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Visitor micael.a
Visitor
226 Views
Registered: ‎10-18-2018

Force USB 1.1 on Zynq Ultrascale+

We have a customer who have intermittent problems using USB2.0 devices on a custom board using XZCU3EG. This is most likely due to the signal integrity over multiple cables and connectors. The HW (including cables & connectors) are fixed and cannot be changed. Transfer speeds is not important in this case so we would like to try to force the USB ports to be USB1.1, but we are not sure if this is even possible.

We have trid altering the 'maximum-speed' property to 'full-speed' of the dwc3-node in the device tree, but the speed is still reported as 480M. Any thoughts or advices?

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Moderator
Moderator
188 Views
Registered: ‎04-24-2017

Re: Force USB 1.1 on Zynq Ultrascale+

Hi @micael.a,

We haven't tested this use case. I can double check on this.

Thanks,
Sandeep
PetaLinux Yocto | Embedded SW Support

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Visitor micael.a
Visitor
170 Views
Registered: ‎10-18-2018

Re: Force USB 1.1 on Zynq Ultrascale+

Hi @sandeepg,

Thank you for looking into this, any help we can get is much appreciated.

//Micael

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