You could try to use issue_stream_cmd directly from the DDC or the Radio rather than from the rx_streamer. If this test is successful (i.e., the data stream passes thru your gain block to UHD), then this implies that the "action propagation" is not working as expected. Here is how it should work.... When you call rx_streamer->issue_stream_cmd(), this action should be propagated to your gain block (assuming this is the adjacent upstream block), then the DDC block, and finally the Radio block (which will start the streaming). If something is broken in the action propagation of your gain block, the action will never reach the Radio and thus will never start streaming.
On a likely related issue, it seems that your gain block is showing up as "Block#0" which means that UHD does not find your custom block controller. I think it is likely that this is causing the issue, but I don't know for sure. If you have a custom block controller you may need to make sure your OOT lib is copied to the same folder as the installed UHD lib (or other method so that your OOT lib is found). Rob On Mon, Dec 6, 2021 at 3:56 AM <[email protected]> wrote: > I'm currently attempting to realize the RFNoC example described in the > "Out-of-tree Modules" section of this web page. > https://kb.ettus.com/Getting_Started_with_RFNoC_in_UHD_4.0 > > I've followed step by step the instructions until the make > x310_rfnoc_image_core command. Since I'm targeting a N320 device I had to > do some modifications inside the rfnoc-demo directory. > Below the additional step I've performed > > I've created a n320_rfnoc_core.yml inside rfnoc-demo/icores > > > This file was created from the original n320_rfnoc_core.yml located in > uhd/fpga/usrp3/top/n3xx/ with the following modifications: > > -- creation of a new endpoint > ep4: # Stream endpoint name > ctrl: False # Endpoint passes control traffic > data: True # Endpoint passes data traffic > buff_size: 32768 # Ingress buffer size for data > > -- definition of the gain block: > gain0: > block_desc: ’gain.yml’ > > -- connection between the block and the endpoint > > - > > { srcblk: ep4, srcport: out0, dstblk: gain0, dstport: in } > - > > { srcblk: gain0, srcport: out, dstblk: ep4, dstport: in0 } > > Then I've modified the CMakeLists.txt inside rfnoc-demo by > replacing all the occurrences of X310 with N320. > I've deleted the content of the rfnoc-demo/build directory > and I've performed the following commands : > > cd ~/rfnoc-demo/build > cmake -DUHD_FPGA_DIR=<UHD4.1 repo>/fpga/ ../ > make n320_rfnoc_image_core > > I've loaded the generated bitstream inside the n320. At this point > I've executed the following Python script : > > import sys > import re > import uhd > import numpy as np > import matplotlib > from matplotlib import pyplot > > graph = uhd.rfnoc.RfnocGraph("addr=192.168.0.1") > for edge in graph.enumerate_static_connections(): > print(edge.to_string()) > radio_noc_block = graph.get_block("0/Radio#0") > radio_block = uhd.rfnoc.RadioControl(radio_noc_block) > > pkt_length = 4 > > radio_noc_block = graph.get_block("0/Radio#0") > radio_block = uhd.rfnoc.RadioControl(radio_noc_block) > radio_block.set_properties(f'spp={pkt_length}', 0) > > sa = uhd.usrp.StreamArgs("fc32", "sc16") > sa.args = "spp=" + str(pkt_length) > > ddc_block = uhd.rfnoc.DdcBlockControl(graph.get_block("0/DDC#0")) > > rx_streamer = graph.create_rx_streamer(1, sa) > > graph.connect("0/Radio#0", 0, "0/DDC#0", 0, False) > print("Graph with gain_block \n") > graph.connect("0/DDC#0", 0, "0/Block#0", 0, False) > graph.connect("0/Block#0", 0, rx_streamer, 0) > graph.commit() > > radio_block.set_rx_frequency(2500e6, 0) > radio_block.set_rx_gain(40, 0) > radio_block.set_rx_antenna("RX2", 0) > radio_block.set_rate(125e6) > > ddc_block.set_input_rate(125e6, 0) > ddc_block.set_output_rate(5e6, 0) > > num_samples = int(ddc_block.get_output_rate(0) * 3) > radio_data = np.zeros((1, num_samples), dtype="complex64") > > stream_cmd = uhd.types.StreamCMD(uhd.types.StreamMode.num_done) > stream_cmd.num_samps = num_samples > stream_cmd.stream_now = True > > rx_streamer.issue_stream_cmd(stream_cmd) > num_samples_received = rx_streamer.recv(radio_data, > uhd.types.RXMetadata(), 15.0) > print("Nb of samples received = " + str(num_samples_received)) > > matplotlib.pyplot.plot(range(np.size(radio_data[0])), > np.real(radio_data[0]), "g", range(np.size(radio_data[0])), > np.imag(radio_data[0]), "r") > pyplot.show() > > Below you can see the output of this script : > > [INFO] [UHD] linux; GNU C++ version 9.3.0; Boost_107100; > UHD_4.1.0.4-118-g06a9ded7 > [INFO] [MPMD] Initializing 1 device(s) in parallel with args: > mgmt_addr=192.168.0.1,type=n3xx,product=n320,serial=31A5C61,fpga=HG,claimed=False,addr=192.168.0.1 > [INFO] [MPM.PeriphManager] init() called with device args > fpga=HG,mgmt_addr=192.168.0.1,product=n320,clock_source=internal,time_source=internal'. > [INFO] [MPM.Rhodium-0] init() called with args > fpga=HG,mgmt_addr=192.168.0.1,product=n320,clock_source=internal,time_source=internal' > [INFO] [MPM.Rhodium-1] init() called with args > `fpga=HG,mgmt_addr=192.168.0.1,product=n320,clock_source=internal,time_source=internal' > [INFO] [MPM.Rhodium-0.init.LMK04828] LMK initialized and locked! > [INFO] [MPM.Rhodium-0.DAC37J82] DAC PLL Locked! > [INFO] [MPM.Rhodium-0.AD9695] ADC PLL Locked! > [INFO] [MPM.Rhodium-0.init] JESD204B Link Initialization & Training > Complete > [WARNING] [UDP] The send buffer could not be resized sufficiently. > Target sock buff size: 2500000 bytes. > Actual sock buff size: 1048576 bytes. > See the transport application notes on buffer resizing. > Please run: sudo sysctl -w net.core.wmem_max=2500000 > [WARNING] [RFNOC::BLOCK_FACTORY] Could not find block with Noc-ID 0xb16, > 0xffff > 0/SEP#0:0==>0/DUC#0:0 > 0/DUC#0:0==>0/Radio#0:0 > 0/Radio#0:0==>0/DDC#0:0 > 0/DDC#0:0==>0/SEP#0:0 > 0/SEP#1:0==>0/DUC#1:0 > 0/DUC#1:0==>0/Radio#1:0 > 0/Radio#1:0==>0/DDC#1:0 > 0/DDC#1:0==>0/SEP#1:0 > 0/SEP#2:0==>0/Replay#0:0 > 0/Replay#0:0==>0/SEP#2:0 > 0/SEP#3:0==>0/Replay#0:1 > 0/Replay#0:1==>0/SEP#3:0 > 0/SEP#4:0==>0/Block#0:0 > 0/Block#0:0==>0/SEP#4:0 > Graph with gain_block > > [WARNING] [UDP] The send buffer could not be resized sufficiently. > Target sock buff size: 2500000 bytes. > Actual sock buff size: 1048576 bytes. > See the transport application notes on buffer resizing. > Please run: sudo sysctl -w net.core.wmem_max=2500000 > [WARNING] [0/Radio#0] Coercing requested sample rate from 125 MHz to 200 > MHz, the closest possible rate. > [INFO] [MPM.Rhodium-0] init() called with args > `fpga=HG,mgmt_addr=192.168.0.1,product=n320,clock_source=internal,time_source=internal,master_clock_rate=200000000.0,ref_clk_freq=25000000.0' > [INFO] [MPM.Rhodium-0.init.LMK04828] LMK initialized and locked! > [INFO] [MPM.Rhodium-0.DAC37J82] DAC PLL Locked! > [INFO] [MPM.Rhodium-0.AD9695] ADC PLL Locked! > [INFO] [MPM.Rhodium-0.init] JESD204B Link Initialization & Training > Complete > Nb of samples received = 0 > > As you can see the static connections inside the FPGA look good, but the > gain block seems to prevent any samples to reach the Rx_streamer. By > directly connecting the > DDC to the RX_streamer the N320 starts to produce data. My guess is, there > might be something I've missed out on the Python script, but I cannot find > any information > about this part of the RFNoC process. > > I have also posted this issue on the UHD github web page > > https://github.com/EttusResearch/uhd/issues/538 > > Unfortunately, I have not yet received any answer. I'm running out of > ideas, any input is welcome. > Thanks in advance! > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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