[USRP-users] Problems duplicating rfnoc_rxtx.grc radios for two UBX-160's in an X310

Martin Braun martin.braun at ettus.com
Wed Jul 5 17:07:51 EDT 2017


On 06/27/2017 02:32 PM, Swanson, Craig via USRP-users wrote:
> Jonathon,
> 
> I am able to successfully run the flowgraph from the
> gr-ettus/examples/rfnoc directory called rfnoc_rxtx.grc.  This works
> great for a single UBX-160. 
> 
> 
> But if I have two daughtercards, I am running into two problems:
> 
> 1) It needs two dmafifos.  How do I instantiate two dmafifos?

Craig,

why do you need 2 DMA FIFOs? It has 2 channels after all.

> 2) I get errors where it seems to be unable to grab ddc_1 and duc_1.  It
> errors out because it says ddc_0 and duc_0 are already connected.

Are you using multi_usrp API?

-- M
> 
> 
> This is all happening with the HG or XG version of usrp_x310_fpga_HG.bit
> or usrp_x310_fpga_RFNOC_HG.bit found in the images directory.
> 
> 
> GNU C++ version 5.4.0 20160609; Boost_105800;
> UHD_4.0.0.rfnoc-devel-369-g1908672f]
> 
> 
> Craig
> 
> 
> *Craig F. Swanson*
> */Research Engineer II
> /*
> */Information and Communications Laboratory/*
> */Communications, Systems, and Spectrum Division/*
> /Georgia Tech Research Institute/
> /Room 560
> 250 14th St NW
> /
> /Atlanta, GA 30318/
> /Cell: 770.298.9156/
> http://www.gtri.gatech.edu
> <https://mail.gtri.gatech.edu/owa/redir.aspx?C=c20925f2f0af4dd29329ddf0701ecfff&URL=http%3a%2f%2fwww.gtri.gatech.edu%2f> 
> 
> 
> 
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