Hello, I am having USRP X300 device with following tool versions:
Vivado 2021.1 - AR76780n, GNU radio version - v3.11.0.0git-820-g2adbd4ea UHD version - UHD_4.7.0.0-84-gbdada1ed I have added FFT and Spliter RFNoC blocks in my bit file. The "uhd_usrp_probe" command shows correct connection in the blocks. | | RFNoC blocks on this device: | | | | * 0/DDC#0 | | * 0/FFT#0 | | * 0/Radio#0 | | * 0/Replay#0 | | * 0/SplitStream#0 | _____________________________________________________ | / | | Static connections on this device: | | * 0/Radio#0:0==>0/DDC#0:0 | | * 0/Radio#0:1==>0/DDC#0:1 | | * 0/DDC#0:1==>0/SEP#0:0 | | * 0/DDC#0:0==>0/SplitStream#0:0 | | * 0/SplitStream#0:1==>0/FFT#0:0 | | * 0/SplitStream#0:0==>0/SEP#2:0 | | * 0/FFT#0:0==>0/SEP#1:0 | | * 0/SEP#3:0==>0/Replay#0:0 | | * 0/Replay#0:0==>0/SEP#3:0 | | * 0/SEP#4:0==>0/Replay#0:1 | | * 0/Replay#0:1==>0/SEP#4:0 However, on running example code available on GNURADIO *"rfnoc_split_stream.grc"*. I get following error: *1. When FFT size = 1024 (as in the example given in gnu radio)* *--------------------------------------------------------------------------------------------------------------------------* *[ERROR] [RxStreamer#0] Cannot resolve spp! Must be a multiple of 1024 but max value is 364Traceback (most recent call last): File "/home/quasar/gnuradio/gr-uhd/examples/grc/rfnoc_split_stream.py", line 347, in <module> main() File "/home/quasar/gnuradio/gr-uhd/examples/grc/rfnoc_split_stream.py", line 326, in main tb.start() File "/usr/local/lib/python3.8/dist-packages/gnuradio/gr/top_block.py", line 116, in start top_block_start_unlocked(self._impl, max_noutput_items)RuntimeError: ValueError: Samples per packet is incompatible with atomic item size!* *--------------------------------------------------------------------------------------------------------------------------* How to know what is atomic size and how can I set it. On searching for this error I came across following link: *https://github.com/EttusResearch/uhd/commit/f163af41a47ab4c702ffbdb10352cf875d604d74 <https://github.com/EttusResearch/uhd/commit/f163af41a47ab4c702ffbdb10352cf875d604d74>* This says rx stream is having a bug and AIS is in unit bytes, and spp in unit items. It was a response of two years back with the uhd version v4.3.0.0-rc1 <https://github.com/EttusResearch/uhd/releases/tag/v4.3.0.0-rc1>. Does this explanation still hold? What is the max FFT size I can use? I want to use *2048*, what changes need to be done for it. *1. When FFT size = 256* *--------------------------------------------------------------------------------------------------------------------------* *[ERROR] [RFNOC::GRAPH::DETAIL] The following properties could not be resolved:[ERROR] [RFNOC::GRAPH::DETAIL] Dirty: RxStreamer#1[INPUT_EDGE:0 atomic_item_size]Traceback (most recent call last): File "/home/quasar/gnuradio/gr-uhd/examples/grc/rfnoc_split_stream.py", line 347, in <module> main() File "/home/quasar/gnuradio/gr-uhd/examples/grc/rfnoc_split_stream.py", line 326, in main tb.start() File "/usr/local/lib/python3.8/dist-packages/gnuradio/gr/top_block.py", line 116, in start top_block_start_unlocked(self._impl, max_noutput_items)RuntimeError: RfnocError: ResolveError: Could not resolve properties.* *--------------------------------------------------------------------------------------------------------------------------* Am I doing anything wrong in the yml script because the connection seems correct in the uhd_usrp_probe command. On further searching I found that SPP i.e. sample per packet must be the same for all the blocks. Tried doing it in gnu radio by assigning the args option with f"spp={fft_size}". Is this correct? It gives no change in error howver I get additional warning as [WARNING] [0/FFT#0] set_properties() cannot set property `spp': No such property. [WARNING] [0/DDC#0] set_properties() cannot set property `spp': No such property. Please help me to solve these errors. -- Regards, *Nidhi Panda* *Cyronics Innovation Labs Pvt Ltd* #11, Electronics Co-op Estate Satara Road, Pune - 411009
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