Fast VHDL CORDIC Sine and Cosine Component on Lattice XP2 Device Using Diamond 3.12

RE: Fast VHDL CORDIC Sine and Cosine Component on Lattice XP2 Device Using Diamond 3.12

jc2048 — Wed, 05 Apr 2023 09:22:14 GMT

Just to emphasise that this is still work in progress, here are the sine and cosine waveforms at full amplitude where my arithmetic wraps round. Given the way the algorithm works, I think I'll probably need an extra bit of resolution for headroom to deal with that, but we'll see. Needs a little more consideration, in any case.

RE: Fast VHDL CORDIC Sine and Cosine Component on Lattice XP2 Device Using Diamond 3.12

Jan Cumps — Sat, 01 Apr 2023 09:24:57 GMT

Replicated on a Spartan-7:

Vivado didn't want to tell the resource use, I'd have to build a little design with the generics for that.

RE: Fast VHDL CORDIC Sine and Cosine Component on Lattice XP2 Device Using Diamond 3.12

michaelkellett — Fri, 31 Mar 2023 15:45:51 GMT

Interesting.

I've used the Lattice Cordic IP in the past, it likes to grab memory for biggish look up tables.

They still make you pay for it.

The Effinix core is free, data for their Trion part below:

The Titanium part is about the same resource utilisation but about 3x faster.

It looks as if sin and cos are approx 16 bit precision so your work looks competetive in terms of resource use and speed.