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View Code? Open in Web Editor NEWPYNQ example of an OFDM Transmitter and Receiver on RFSoC.
PYNQ example of an OFDM Transmitter and Receiver on RFSoC.
Hello, I think this is a great tool and have been using it with my RFSoC 4x2 board to monitor channel disturbances due to active circuit elements in antennas. However, I was wondering if there is a way to expand the capabilities to pull the data from the constellation plots and perform some sort of EVM or BER/SER calculations on them? I have been using the help functions but with little luck.
The system will halt on initialisation if the system is not connected in loopback. A kernel interrupt is required to fix the issue.
We should add the following hierarchy to allow this overlay to be compatible with drivers from rfsoc_sam.
The IPI diagram needs the following hierarchies:
radio -> receiver -> channel_yx -> (ofdm ip cores)
radio -> transmitter -> channel_yx -> (ofdm ip cores)
radio -> rfdc (ip core)
y is the tile, and x is the block.
The IP Cores in the channel hierarchies can be linked using a software wrapper.
See the hierarchies.py and channels.py in rfsoc_sam_private for an idea of whats happening here.
I followed the exact instructions to run the ofdm demonstration on the zcu111; flashed PYNQ 2.7 and ran pip3 install git+https://github.com/strath-sdr/rfsoc_ofdm
OSError Traceback (most recent call last)
in
2 import ipywidgets as ipw
3
----> 4 ofdm_hw = Overlay()
/usr/local/share/pynq-venv/lib/python3.8/site-packages/rfsoc_ofdm-0.3.2-py3.8.egg/rfsoc_ofdm/overlay.py in init(self, bitfile_name, init_rf_clks, **kwargs)
27 self.adc_block = self.adc_tile.blocks[0]
28
---> 29 self.configure_clocks()
30 self.configure_adcs()
31 self.configure_dacs()
/usr/local/share/pynq-venv/lib/python3.8/site-packages/rfsoc_ofdm-0.3.2-py3.8.egg/rfsoc_ofdm/overlay.py in configure_clocks(self, lmk_freq, lmx_freq)
53 """
54
---> 55 xrfclk.set_ref_clks(lmk_freq=lmk_freq, lmx_freq=lmx_freq)
56
57
/usr/local/share/pynq-venv/lib/python3.8/site-packages/xrfclk/xrfclk.py in set_ref_clks(lmk_freq, lmx_freq)
248
249 for lmk in lmk_devices:
--> 250 _set_LMK_clks(lmk_freq, lmk)
251 for lmx in lmx_devices:
252 _set_LMX_clks(lmx_freq, lmx)
/usr/local/share/pynq-venv/lib/python3.8/site-packages/xrfclk/xrfclk.py in _set_LMK_clks(lmk_freq, lmk)
153 raise RuntimeError("Frequency {} MHz is not valid.".format(lmk_freq))
154 else:
--> 155 _write_LMK_regs(_Config[lmk['compatible']][lmk_freq], lmk)
156
157 def _get_spidev_path(dev):
/usr/local/share/pynq-venv/lib/python3.8/site-packages/xrfclk/xrfclk.py in _write_LMK_regs(reg_vals, lmk)
73 f.write(data[1:])
74 else:
---> 75 f.write(data)
76
77 def _write_LMX_regs(reg_vals, lmx):
OSError: [Errno 6] No such device or address
Any ideas on how to solve this error?
The following two figures are from your RFSoC-2x2 Voila notebooks, displaying the time-domain signal at the receiver block. Just looking at the waveforms I realize that the waveform denoted Decimated
, is in fact not the decimated signal at all, but the un-decimated signal input to the decimator block. Whereas the waveform denoted Symbols
(which on the other hand is true) is the decimated signal.
Not anything major, but I must say that I was a bit confused for a while when working with this.
Best regards,
Mikael Henriksson
With or without the CLK104 board.
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