That shouldn't be. Even if you connect both outputs to the host? I admit I got fed up with it in my own application (don't want both streams going into the host) and just modified the addsub block to be an add-only block.
On Tue, Sep 3, 2019 at 8:43 PM Quadri,Adnan <adnan.qua...@louisville.edu> wrote: > I tried connecting one Signal Source block to both the inputs of addsub > block. It still throws the same error. > > Adnan > ------------------------------ > *From:* Nick Foster <bistrom...@gmail.com> > *Sent:* Tuesday, September 3, 2019 11:40:05 PM > *To:* Quadri,Adnan <adnan.qua...@louisville.edu> > *Cc:* usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> > *Subject:* Re: [USRP-users] Addsub HLS Block Error > > Oh, I see. You have separate sources connected to the same addsub block. > It's telling you that you need to use timed stream commands to start the > stream, or else you will see undefined behavior. Personally I think that > error should be demoted to a warning -- anyone from Ettus want to chime in? > > On Tue, Sep 3, 2019 at 3:53 PM Quadri,Adnan <adnan.qua...@louisville.edu> > wrote: > >> Hello, >> >> Thank you for your prompt response. I have connected both the addsub >> output to two QT Gui Sink but I still get the same error. I have the Copy >> block in the middle as well. >> >> I am attaching a screenshot of my flowgraph. I tried with different USRP >> sources/Signal Sources as well. But it is the same error. >> >> Thanks, >> Adnan >> >> ------------------------------ >> *From:* Nick Foster <bistrom...@gmail.com> >> *Sent:* Tuesday, September 3, 2019 3:57 PM >> *To:* Quadri,Adnan <adnan.qua...@louisville.edu> >> *Cc:* usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> >> *Subject:* Re: [USRP-users] Addsub HLS Block Error >> >> I ran into this the other day and it's independent of the HLS component >> of the addsub block (since the interface is identical). You need to connect >> both outputs of the addsub block to something, even a null sink. I'm pretty >> sure this wasn't the intended behavior and also pretty sure that it wasn't >> like this last time I checked (which was more than a year ago), so maybe it >> should be filed as a bug. >> >> Nick >> >> On Tue, Sep 3, 2019 at 1:48 PM Quadri,Adnan via USRP-users < >> usrp-users@lists.ettus.com> wrote: >> >> Hello, >> >> We are trying to run the RFNoC addsub HLS block. >> >> I was able to build the FPGA Image and made sure in the noc_block verilog >> code to point to the HLS implementation for addsub block on RFNoC as >> opposed to the verilog/VHDL implementation. >> >> But when we run the example Flowgraph with two signal source as input to >> the two inputs for addsub block on GRC, we get the following error - >> >> ERROR: >> thread[thread-per-block[4]: <block uhd_rfnoc_AddSub (1)>]: RuntimeError: >> Invalid recv stream command - stream now on multiple channels in a single >> streamer will fail to time align. >> >> Does this have anything to do with the C++ code for HLS implementation or >> is it a problem at UHD level? >> >> Thanks, >> Adnan >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> <https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.ettus.com_mailman_listinfo_usrp-2Dusers-5Flists.ettus.com&d=DwMFaQ&c=OAG1LQNACBDguGvBeNj18Swhr9TMTjS-x4O_KuapPgY&r=JoNl3b2Pn0MHhs668QvjpcSGl6s3MEmtJLBypH6x02U&m=XH0fqWeFmcl-P0_Y01iOhbHXEKDsJDUBaImT_nfh0t4&s=_hsJH03rqnDSUZXWGyx31-8I7HJLsU5_S5hs-j5_WRw&e=> >> >>
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