FPGA Prototyping By Verilog Examples: Xilinx Spartan-3 Version cover
FPGA Prototyping By Verilog Examples: Xilinx Spartan-3 Version
by Pong P. Chu
ISBN: 0470185325
Buy on Amazon
Found in 1 comment on Hacker News
duskwuff · 2017-08-25 · Original thread
Not an online course, but my go-to recommendation is "FPGA Prototyping by Verilog Examples" [1]. Or, if you want to learn VHDL, [2].

[1]: https://www.amazon.com/dp/0470185325

[2]: https://www.amazon.com/dp/0470185317