Here you can find the drivers, Arduino side and FPGA side, related to the project explained into my Linkedin article.
Please, refer to it for a detailed explaination.
Copy the folder FPGADriver into your Arduino libraries folder
Open a project inside \fpga with the related programming tool.
\fpga\cmod-a7\arduino_cmod-a7.xpr --> Xilinx Vivado
\fpga\tang-nano20k\arduino_fpga.gprj --> GOWIN FPGA Designer
\fpga\tang-nano9k\arduino_fpga.gprj --> GOWIN FPGA Designer
Have fun