Hi Wade, I thought that the recent changes regarding atomic_item_size would eliminate the need for the user to configure spp for the case of the FFT (and perhaps all cases). Is that true? If so, what is the UHD version needed for this functionality - UHD 4.2? Rob
On Tue, Jan 10, 2023 at 9:15 PM Wade Fife <[email protected]> wrote: > One trick with the FFT block I think is that the packet size needs to > match the FFT size. Try something like: > > radio = uhd.rfnoc.RadioControl(graph.get_block("0/Radio#0")) > radio.set_properties("spp=" + str(fft_size)) > > Wade > > > On Sat, Jan 7, 2023 at 12:11 PM Piotr Krysik <[email protected]> wrote: > >> Hello, >> >> Does anybody have a working example of usage of FFT RFNoC block on X410? >> >> Recent example for other USRP i.e. X310 would also be quite good. >> >> I followed the description here: >> https://kb.ettus.com/Getting_Started_with_RFNoC_in_UHD_4.0 >> to add the fft block (I've attached my changed RFNoC's YML). >> Here are my additions to stock rfnoc image core yml >> (x410_200_rfnoc_image_core.yml): >> >> stream_endpoints: >> ep_fft: >> ctrl: False >> data: True >> buff_size_bytes: 32768 >> >> noc_blocks: >> fft0: >> block_desc: 'fft_1x64.yml' >> >> connections: >> # FFT Blocks Connections >> - { srcblk: ep_fft, srcport: out0, dstblk: fft0, dstport: in_0 } >> - { srcblk: fft0, srcport: out_0, dstblk: ep_fft, dstport: in0 } >> >> clk_domains: >> - { srcblk: _device_, srcport: radio_2x, dstblk: fft0, dstport: >> ce } >> >> When I use FFT block I don't get any samples (checked with Wireshark) >> - I get only timeout errors and information about overflows. >> >> I've attached an example Python code. The same result is obtained in GNU >> Radio. >> >> Probably there is something wrong with the FFT block, but I don't know >> what it might be exactly. I've tried to use different clock rate >> ('radio' clock) >> but without success. >> >> -- >> Best Regards, >> Piotr Krysik >> _______________________________________________ >> USRP-users mailing list -- [email protected] >> To unsubscribe send an email to [email protected] >> > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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