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ADSP-BF524 Does not respond to USBHSET TEST_PACKET

Question asked by jhebert on Aug 19, 2011
Latest reply on Aug 22, 2011 by jhebert

I am trying to perform device high speed USB signal quality testing on a product that uses the ADSP-BF524.  Using the USB-IF High SPeed Electrical Test Tool (HSETT), I can enumerate the bus and perform some functions on the DSP.  However, the TEST_PACKET, which is designed to force the device to continually transmit a packet (without the host), does not work.  Therefore I can't actually complete any signal quiality tests.

 

I have performed this test before on other USB devices without issue.  I find it hard to believe that ADI would not support this test mode.  So perhaps this needs to be supported in the firmware, but I would think this TEST_PACKET function would be built into the USB controller.

 

Any ideas on how I can run HS USB signal quality tests on the Blackfin?

 

Thanks.

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