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?