Arithmetic (from Shift Registers) Using the Tang Nano 9K FPGA Board

This video shows an FPGA project (my first) that interacts with a Raspberry Pi. The FPGA implements registers A, B, and C. It supports serial loading of A and B, the math operation C = C + A*B, and serial reading of C. It uses the educational version of the Gowin IDE, and shows how a parallel-in, parallel-out shift register is synthesized.

Chapters
0:00 FPGA resources to be used.
0:35 Project goals and function.
1:05 Design.
2:43 Hardware setup.
2:57 Pin assignments on FPGA and Raspberry Pi.
3:36 Tour of project running.
5:40 Verilog introduction.
6:22 Serial-in, parallel-out shift register.
7:45 Parallel-in, parallel-out shift register.
10:28 What the PIPO synthesizes to.
15:16 Top-level module design.
16:02 Top-level module Verilog.
18:31 FPGA constraints file (assigns pins)
19:03 C program for the Raspberry Pi
21:03 Wrapping up.

See here for project source: https://github.com/grughuhler/grug_mi...

This is an updated repo from the one referenced in the video. It is more complete, but has no substantial changes. See README on the git for pin connections.

git clone https://github.com/grughuhler/grug_mi...
cd grug_misc_projects.git/tang_nano_mac_fpga

Use Gowin project file: tang_mac_fpga.gprj and C program c/mac_command

See README files on the git repo.

See here for my getting started video on the Tang Nano 9K:
   • Getting started with the Tang Nano 9K FPGA...