Hi Rob, This is definitely one of those trying to use it in a way for which it was not intended cases. I personally think you will spend more time trying to mix the multi_usrp and device APIs than just re-writing the code for the device3 API. There are a lot of subtle issues and corner cases that can potentially cause problems. If you want to do some more exploring though, you can look at the code in host/lib/rfnoc/legacy_compat.cpp. That is the code responsible for connecting the blocks for the multi_usrp API and handling all the calls from the multi_usrp API that need extra interpretation before calling into the device3 API.
Regards, Michael On Fri, Oct 19, 2018 at 2:21 PM Rob Kossler via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi, > I am wondering about the possibility (perhaps advisability) of using the > multi_usrp object (in a custom C++ application with UHD) with an RFNoC FPGA > image that includes a custom block. I realize that the multi_usrp object is > only advertised to work with the default image, but that doesn't mean it > can't be used with custom ones. > > Specifically, I am interested in using the 'Replay' block. I would like > to create my multi_usrp object as usual which will presumably create an > RFNoC graph as follows: > - transmit flow: Host -> RAM FIFO -> DUC -> Radio > - receive flow: Radio -> DDC -> Host > > After multi_usrp object creation, I would like to re-wire the graph to > replace the RAM FIFO with the Replay Block. This is desirable because it > allows me to retain the bulk of my code that uses the multi_usrp object > (with its handling of multiple devices and channel enumerations). I > realize that I would still have some 'Replay' block specific code for > populating the samples (recording) and then initiating the playback, but > that should be relatively straightforward to implement. > > Let me know if this is a good or bad approach. If good, how would I go > about re-wiring the graph? > 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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