strath-sdr/rfsoc_ofdm

PYNQ example of an OFDM Transmitter and Receiver on RFSoC.

rfsoc_ofdm's Issues

Clean up the transmit and receive hierarchies

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.

If loopback is not connected the system halts

The system will halt on initialisation if the system is not connected in loopback. A kernel interrupt is required to fix the issue.

Error when running "make all"

After make all completes I receive this error. The bitstream has been generated successfully. Also running the three makefiles independently has no issues. Was just wondering what the cause of this is.

Add the ZCU670 Development Board

With or without the CLK104 board.

Overlay xrfclk issue

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

However, as soon as the overlay is loaded there is an issue:

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?

Decimated vs. un-decimated signal

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

Numerical Analysis

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.