DVK/custom board are behaving differently (CYU3P_USB_LOG_LTSSM_U0 events) | Cypress Semiconductor
DVK/custom board are behaving differently (CYU3P_USB_LOG_LTSSM_U0 events)
Hallo, I have the BulkSourceSink firmware running on 2 different targets: a Cypress DVK board and a custom designed FPGA board with an FX3.
I enabled the event tracing mechanism provided by Cypress and the output si routed to a UART. My custom HW is failing ( using c++ demo streamer host application) after a while. DVK instead is working without any issue (I attached theme EXCLUSIVELY and to the same USB 3.0 host port)
I noticed that the BulkSourceSink firmware on the DVK board after the initial events do not reports any new event with exception of an "still alive" message (one per second) which I added. On our custom board instead the sourcesink fimware (exactly the same firmware) is reporting continuously CYU3P_USB_LOG_LTSSM_U0 (0x90).
If things are going right I would expect both target producing the same result, isn't it?
What is the meaning of this particular event (LOG_LTSSM_U0 (0x90))? What could trigger this event ?