这是delphi 关于USB通信的例子，有上位机，还有HID.学初学者的参考资料。-This is the delphi examples on USB communication with the host computer , as well as HID. Beginners reference.

The Nexys4 DDR board is a complete, ready-to-use digital circuit development platform based on the latest Artix-7™ Field Programmable Gate Array (FPGA) Xilinx® . With its large, high-capacity FPGA (Xilinx part number XC7A100T-1CSG324C)