I found Intel Cyclone 10 GX FPGA Development Kit has USB3.1 Type-C interface for demo.Do we have any source code for this demo?Thanks

Hello, unfortunately Intel does not own this USB design, hence I'm unable to provide the source code. I would recommend to talk to Intel partner SLS to inquire further on this design. Please refer to the link below to get the contact information. Thanks.

https://www.intel.com/content/www/us/en/programmable/solutions/partners/partner-profile/system-level-solutions--inc-/ip/embedded-usb-3-1-gen-2-device-controller--eusb31sf-.html