On 04/20/2016 04:48 PM, Jingyi Sun wrote: > tagged_stream_mux works when substituted for my block, so I think all of > my inputs are tagged streams. Also, my inputs are coming from the > outputs of OFDM_frame_equalizer, which I think propagates tagged streams?
Yes. M > I think it's an error somewhere in the code, but the changes I mentioned > are the only changes I made between the block working and the block not > working. > > My code is based on OFDM_frame_equalizer, but without the actual signal > processing part. I will fill in my own signal processing after I know I > can at least pass one out of three inputs along so that the outputs are > the same as if this new block were bypassed. > > > > > On Wed, Apr 20, 2016 at 6:24 PM, Martin Braun <[email protected] > <mailto:[email protected]>> wrote: > > The tagged_stream_mux is an example of this kind of block. As Andrej > points out, you need to make sure every input signal is actually a > tagged stream. > > Cheers, > M > > On 04/20/2016 03:12 PM, Andrej Rode wrote: > > Hello Jenny, > > > > I can try to help you, but I'm not quite sure if I am right. If I > am wrong I > > will be corrected soon. > > > >>>> Generating: "/home/jenny/Tutorials/rx_ofdm.py" > >>>> Executing: "/home/jenny/Tutorials/rx_ofdm.py" > >>>> Using Volk machine: sse4_2_64_orc > >>>> gr::log :FATAL: geese_vcvc0 - Missing a required length tag on > port 1 at > >>>> item #0 > >>>> thread[thread-per-block[46]: <block geese_vcvc (1)>]: Missing > length tag. > > > > This error tells you that your block is missing a length tag in > one of his > > inputs. A Stream Tag on the first sample is a requirement for a > tagged stream > > block. This Stream Tag has to provide information about how much > input data > > your block has to process. > > I assume you don't have an tagged stream on each of your inputs > and this > > causes a problem for your tagged stream block. > > > > Best you provide a screenshot of your example flowgraph (the > relevant parts). > > Based on the error it is nothing inside of your block but the way > you are > > trying to feed it with samples. > > > > Best Regards, > > Andrej > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] <mailto:[email protected]> > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] <mailto:[email protected]> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
