Quick update. Still no fix but if I put a Null Source instead of the RFNoC Radio block for the RX side, now I get the following error. RuntimeError: On node 0/DDC_0, input port 0 is already connected.
The error has moved from the output port of the Radio block to the input port of the DDC. Is there something wrong with how the GNU Radio Companion instantiates the RFNoC blocks? The FPGA has 2 DDC blocks in it. I tried changing Block Select from -1 to 1 to use DDC_1. But I get the same error as above but with DDC_1 instead of DDC_0. On Tue, May 29, 2018 at 3:25 PM, Peter Sanchez <petersand...@gmail.com> wrote: > Hi all, > > I want to transmit using a Signal Source + UHD USRP Sink on Channel A, > while receiving using RFNoC Radio + RFNoC DDC on Channel B. The USRP Sink > block has Mb0 Subdev Spec set to A:0. The RFNoC Radio has Radio Select > set to B. Attached a picture of the flow graph. > > If I disable the RX blocks and leave just the TX blocks, GNU Radio > Companion runs the flow graph without errors. And if I disable the TX > blocks and leave just the RX blocks GNU Radio Companion runs without errors > again. > > But if the TX and RX blocks are both set enabled then I get the following > error. > >> Traceback (most recent call last): >> File "/home/user/rfnoc/src/uhd-fpga/usrp3/tools/scripts/tester.py", >> line 235, in <module> >> main() >> File "/home/user/rfnoc/src/uhd-fpga/usrp3/tools/scripts/tester.py", >> line 229, in main >> tb = top_block_cls() >> File "/home/user/rfnoc/src/uhd-fpga/usrp3/tools/scripts/tester.py", >> line 160, in __init__ >> self.device3.connect(self.uhd_rfnoc_streamer_radio_1.get_block_id(), >> 0, self.uhd_rfnoc_streamer_ddc_0.get_block_id(), 0) >> File "/home/user/rfnoc/lib/python2.7/dist-packages/ettus/ettus_swig.py", >> line 1673, in connect >> return _ettus_swig.device3_sptr_connect(self, *args) >> RuntimeError: RuntimeError: On node 0/Radio_1, output port 0 is already >> connected. >> > > What can I do so I can RX and TX at the same time without getting this > error? > > Cheers > > >
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