Hi Paul, thank you for your reply. Do you remember how you set the SPP block parameter? Did you set it in a GNU Radio flowgraph, a script, or something else?
Regards Luca Von: Paul Atreides <maud.dib1...@gmail.com> Gesendet: Montag, 14. August 2023 16:35 An: Bachmaier, Luca <luca.bachma...@iis.fraunhofer.de> Cc: usrp-users@lists.ettus.com Betreff: Re: [USRP-users] RFNoC 4: RFNoC FFT Block in GNU Radio companion Luca: At one point I was trying a Fosphor FPGA image and I remember it was important to set the spp block parameter to be equal in all the blocks that would accept that parameter. So spp=1024 or whatever your FFT size is. That may have changed since 4.0 but that was the case in the past. <end transmission> On Aug 14, 2023, at 10:29, Bachmaier, Luca <luca.bachma...@iis.fraunhofer.de<mailto:luca.bachma...@iis.fraunhofer.de>> wrote: Hello everyone, I’m currently developing a GNU Radio flowgraph with RFNoC 4.3 which uses the RFNoC FFT block. According to this workshop (https://www.youtube.com/watch?v=4XXqk0yGvCI @ 18:10) there are five runtime parameters you have to set for the FFT block: magnitude, direction, length, fft_scaling, shift_config. I’m not exactly sure where in the flowgraph I can set these properties. E.g. is setting the “Block Args” parameter of the FFT block to “magnitude=complex,direction=1,length=1024” correct? If not, what is the right way to set the runtime parameters? After setting them as I described I get two python errors when trying to run the flowgraph: 1. Setting magnitude=complex causes this: RuntimeError: RuntimeError: Property magnitude:RuntimeError: Cannot convert `complex' to int! In the flowgraph, the output of the RFNoC FFT block is connected directly to an RFNoC Rx Streamer block. It seems that all default RFNoC blocks only accept an int input. This error seems strange and that’s why I doubt that I set the magnitude parameter correctly. 2. No matter what parameter I set for the FFT, I get the following error: RuntimeError: ValueError: samples per package must not be smaller than atomic item size I was not able to find any sufficient information about this online unfortunately. I hope I was able to describe my problems clearly and would be glad to receive help regarding any of those. Thank you in advance and regards Luca _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> To unsubscribe send an email to usrp-users-le...@lists.ettus.com<mailto:usrp-users-le...@lists.ettus.com>
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