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Please have your customer look at the following posts to start.
If they are interested in a Linux Solution.
Thank you. They tried running their design with the 2019.1 SDK and a custom built hdf file on Ultra96v2 board and were able to get the mass Storage USB 3 device is functioning fully.
I have a customer using the Ultra96-v2 board. They want to use the SOM as a USB 3.0 mass storage device to a Windows PC. They are using the standalone baremetal driver usbpsu version 1.4 and xilinx SDK example sb_intr_example.c and along with chapter 9 xusb code. The design compiles successfully and runs and does print messages on JTAG. However, the PC host does not see Ultra96-v2 based usb3.0 device at all. They are using the USB0 controller on the board
They have also tried with and with out "Enable V BUS Port" under USB3.0 in IO configuration of ZYNQMP block using Vivado HLx 2018.2 tools.
Any thoughts or direction on how to resolve this would be very much appreciated!