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USB errors


Mike Boich

Question

I've had reliability problems with 4 different usb wi-fi adapters running Petalinux on my Cora board.  I finally realized that the problem seems to be in the USB communications between the wifi device and the host.  Occasionally,  I see messages like this:

usb 1-1: new full-speed USB device number 4 using ci_hdrc
usb 1-1: device descriptor read/64, error -110

Any suggestions on how to debug?  I don't have any experience debugging USB.

 

- Mike

 

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I now believe the USB errors were caused by using a suspect fsbl, rather than the one that Petalinux generated.  I'm still having some issues, but I believe they are now related to the extra power used by the wifi module, and not quite tolerated by my dc power supply.

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