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USB Example for ADSP-BF527 Unstable

Question asked by victorjtfranco on Feb 18, 2013
Latest reply on Feb 26, 2013 by victorjtfranco

Hi there.

I'm having a lot of trouble using the USB Bulk Loopback example for the ADSP-BF527 EZ-KIT Lite because the board is not enumerating correctly in the system, and keeps resetting. I know this because I have run the example in a Windows virtual box in a Linux host, and tail -f /var/log/kern.log gives a lot of :

Feb 18 14:18:03 mamoa kernel: [ 5049.635883] hub 2-1:1.0: unable to enumerate USB device on port 2

Feb 18 14:18:03 mamoa kernel: [ 5049.891767] hub 2-1:1.0: unable to enumerate USB device on port 2

Feb 18 14:18:03 mamoa kernel: [ 5050.147568] hub 2-1:1.0: unable to enumerate USB device on port 2

And then a lot of :

        Feb 18 14:21:03 mamoa kernel: [ 5229.107298] usb 2-1.2: USB disconnect, device number 31

Feb 18 14:21:03 mamoa kernel: [ 5229.309477] usb 2-1.2: new high-speed USB device number 32 using ehci_hcd

Feb 18 14:21:07 mamoa kernel: [ 5233.713015] usb 2-1.2: USB disconnect, device number 32

Feb 18 14:21:07 mamoa kernel: [ 5233.913757] usb 2-1.2: new high-speed USB device number 33 using ehci_hcd

 

I wanted to know if this a known issue and if there is already a workaround for this, because it's been quite annoying waiting the USB to "calm down" and only then get to work.

 

Thanks for the Help !

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