Hi Rob, I wanted to give you a quick update. I was able to reproduce the issue you found. There were two problems.
First, the example you shared calls play_halt() for the replay block each time replay is stopped. This basically stops it as soon as possible, even if that means it can't send a final packet with EOB. The DUC needs the EOB to start/stop cleanly or else the timestamps the DUC generates aren't correct when the next set of data comes through. The second problem I found is part of some known issues that are already fixed in UHD 4.0. I'm going to add these fixes to 3.15 since I know there was a lot of interest in the Replay block in 3.15. So once these fixes appear, you should be able to remove the call the play_halt() and the example will work as expected. Thanks, Wade On Thu, Apr 23, 2020 at 9:34 PM Rob Kossler <rkoss...@nd.edu> wrote: > > Great. I forgot to mention that I was using an n310. > > On Thu, Apr 23, 2020 at 10:18 PM Wade Fife <wade.f...@ettus.com> wrote: > >> Hi Rob, >> >> Thanks for the example! I'd take a look to see if I can reproduce the >> issue and figure out what's going on. I've been working recently on the >> Replay block, so I'm very interested to understand what's going on. >> >> Thanks, >> >> Wade >> >> On Thu, Apr 23, 2020 at 1:36 PM Rob Kossler via USRP-users < >> usrp-users@lists.ettus.com> wrote: >> >>> Hi, >>> I am having an issue with UHD 3.15.LTS using the replay block. When I >>> play out my previously stored samples the first time, everything works >>> fine. But after stopping the first time, if I try to start playing out >>> again, I get a whole bunch of 'Lates' and no RF output. >>> >>> In order to duplicate the problem with an Ettus example, I modified >>> 'replay_samples_from_file' to add a loop and command prompt so that the >>> user could hit <enter> to start playing out while still using <ctrl-c> to >>> stop. Unfortunately for me, this worked fine and did not show the problem. >>> >>> Next, I further modified the example to place a DUC block in between the >>> Replay block and the Radio. Now it duplicates the issue perfectly >>> (modified example attached). >>> >>> So, perhaps I need to clear the DUC in some way when stopping the >>> streaming?? But if so, I'm not really sure how to do so. >>> >>> Thanks. >>> Rob >>> >> _______________________________________________ >>> USRP-users mailing list >>> USRP-users@lists.ettus.com >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>> >>
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