Brett (and anyone else who might have some insight.)
Several months ago, you and I had discussed a comb filter implementation. At the time, I was asking why the simulation/probe was not working properly. We assumed that this was just a simulation problem and moved on. Now we are finding that the filter does not actually work on the hardware as expected.
The equation that we want is : y(n) = x(n) - x(n - N) + alpha*y(n-N).
I have attached my implementation, and I'm not seeing what is wrong. It behaves as if the y(n-N) is not there.