[USRP-users] X310 RFNoC Basic Transmit Signal Source Flowgraph Not Working

Hodges, Jeff Jeff.Hodges at gtri.gatech.edu
Thu Jul 23 14:33:26 EDT 2020


Has anyone been able to transmit with RFNoC Radio using the standard FPGA image from UHD.3.15.LTS?


I have a clean installation and ran SigGen --> RFNoC: DmaFIFO --> RFNoC: DUC --> RFNoC: Radio


Most basic flow graph ever. It does not work. I get a run-time error.


Traceback (most recent call last):
  File "/home/nvd/Documents/top_block.py", line 169, in <module>
    main()
  File "/home/nvd/Documents/top_block.py", line 157, in main
    tb = top_block_cls()
  File "/home/nvd/Documents/top_block.py", line 84, in __init__
    self.uhd_rfnoc_streamer_radio_0.set_tx_gain(0, 0)
  File "/usr/local/lib/python2.7/dist-packages/ettus/ettus_swig.py", line 3235, in set_tx_gain
    return _ettus_swig.rfnoc_radio_sptr_set_tx_gain(self, gain, chan)
RuntimeError: _Map_base::at




Jeff

________________________________
From: USRP-users <usrp-users-bounces at lists.ettus.com> on behalf of Hodges, Jeff via USRP-users <usrp-users at lists.ettus.com>
Sent: Wednesday, July 22, 2020 8:49:05 PM
To: usrp-users at lists.ettus.com
Subject: [USRP-users] X310 RFNoC Basic Transmit Signal Source Flowgraph Not Working


I get a set_tx_gain error running a basic signal generator through RFNoC Radio:

Signal Source -> DMA FIFO -> DUC -> Radio  (See image below)


This is equivalent to:

Signal Source --> USRP Sink    (Works fine)


https://kb.ettus.com/File:dma_fifo_v02.png


<https://kb.ettus.com/File:dma_fifo_v02.png>

Traceback (most recent call last):
  File "/home/nvd/Documents/top_block.py", line 169, in <module>
    main()
  File "/home/nvd/Documents/top_block.py", line 157, in main
    tb = top_block_cls()
  File "/home/nvd/Documents/top_block.py", line 84, in __init__
    self.uhd_rfnoc_streamer_radio_0.set_tx_gain(0, 0)
  File "/usr/local/lib/python2.7/dist-packages/ettus/ettus_swig.py", line 3235, in set_tx_gain
    return _ettus_swig.rfnoc_radio_sptr_set_tx_gain(self, gain, chan)
RuntimeError: _Map_base::at



I am using 3.15.LTS.


Any ideas?

Thanks,


Jeff

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