Hi Paul, Your Nocscript has an error on line 47, you are a missing a comma: LE($config 1) should be LE($config, 1). That may not be the source of your issue, but try fixing that first.
Jonathon On Thu, Feb 28, 2019 at 1:14 AM Paul Boven via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi everyone, > > As part of the VLBI[1] backend that I'm making in RFNOC, my first step > is to make a rational resampler. It takes the 100MS/s signal from a > TwinRX, and reduces it to 80MS/s. This can be done with a 5:4 resampler. > In order to make this work, I'm using the axi_rate_change block. > > Although the block works in simulation, I keep running into problems > with the GRC integration, in particular SWIG throwing run-time errors. > > The problem seems to be in the way that the arguments (N, M, config) are > passed around, but studying other blocks like the DDC block hasn't > provided the clues for me to get past this hurdle. > > The resampler itself does work, which I tested by having it emit zeroes > instead of the 'deleted' samples, and using a 'keen 1 in N' in GRC itself. > > At the moment, the block exits in VLBI_swig.py in set_arg: > return _VLBI_swig_resamplerd5x4_sptr_set_arg(self, *args) > RuntimeError: SyntaxError: Parsing Stopped at: $N, 5) > > If you're familiar with RFNOC, can you please have a look at: > > http://www.jive.nl/~boven/rfnoc-VLBI > > It contains the source, and also a compiled bitfile for the X310 for > your convenience (but use at your own risk, of course). > > Regards, Paul Boven. > > [1] Very Long Baseline Interferometry > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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