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Re: [Discuss-gnuradio] Icarus simulation help

From: Sebastiaan Heunis
Subject: Re: [Discuss-gnuradio] Icarus simulation help
Date: Thu, 28 Aug 2008 23:07:30 +0200


Thanks again for the testbed file.  I see what phase_acc does now.
When we do a downconversion, the initial phase that gets written to
the FR_RX_PHASE_0 register is 0, right?  I just want to make sure of
that and that the phase value repeats after about 16 clock cycles.  I
would just like to know if you know of a good testbed tutorial around.
 What I would like to do now is generate a sine wave at 20MHz, sampled
at 64MHz and save this to a text file.  I would also like to save the
phase values generated by phase_acc to a text file.  I then want to
write a testbench for cordic.v with the incoming sine wave and phase
values and save the output from the cordic to a text or datafile.  If
you know how to access and read/write files in Iverilog, could you
please just show me a line of code or two to do it?

Thank you very much.

Sebastiaan Heunis

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