On Nov 30, 2007 6:29 PM, Ronald Jetli <[EMAIL PROTECTED]> wrote:
> Thank you Brian !
>
> I am posting the test bench I am using to simulate / test tx_chain buffer.
> I think it has
> been set up properly to simulate CIC. And I do follow the steps while
> stimulating.
>
> However, I am having trouble setting up test cases for phase accumulator /
> Cordic.
>
> I am posting the code below. It should'nt take much change (atmost few
> lines), but I am stuck with this one.It just dosent seem to work
> for Cordic / Phase accumulator.
>
> Can anyone please chip in ?
>
> The Cordic test bench in fpga folder wasen't good either. It needs
> "sine.txt" file, which is missing.
You need to assert the interpolator_strobe and sample_strobe on a
consistent frequency basis - eg: once every 15 clock cycles. You
can't just randomly assert and deassert them.
You have no frequency set. I believe this frequency should be the
phase difference between samples of the CORDIC for each sample that
goes in where 2^31-1 is equal to 2*PI.
You probably want to see a sine wave or some filtered signal - try a
pulse train, {1, 0, 1, 0, ...} or you can download a math_real.v
module I wrote from here:
http://www.gnuradio.org/trac/browser/gnuradio/branches/developers/zhuochen/simulations/burst_test/math_real.v
Brian
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