Hello Özkan,
I haven't looked into the flowgraphs carefully yet, but you MUST not use a
throttle block SDR source/sink is in the same path. GNU Radio gave you a
warning about this:
>>> Warning: This flow graph contains a throttle block and another rate
>>> limiting block, e.g. a hardware source or sink. This is usually undesired.
>>> Consider removing the throttle block.
Throttle block is used to intentionally slow down the execution of the
flowgraph, for simulation purposes. It causes data drops if used with real
hardware.
Regards,
Kyeong Su Shin
________________________________
보낸 사람: Özkan Sezer <ozkanse...@gmail.com> 대신 Discuss-gnuradio
<discuss-gnuradio-bounces+ksshin=postech.ac...@gnu.org>
보낸 날짜: 2021년 12월 17일 금요일 오전 2:00
받는 사람: discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org>
제목: Fwd: ofdm adalm-pluto
yes, I want to send a file with transmitter adalm-pluto to receiver
adalm-pluto. there is no problem with a direct connection (without adalm-pluto
SDRs). And I take periodic faults with adalm-pluto SDRs like these
Block paths:
/usr/share/gnuradio/grc/blocks
Loading: "/home/sezer/Masaüstü/tx_ofdm.grc"
>>> Done
Generating: '/home/sezer/Masaüstü/tx_ofdm.py'
>>> Warning: This flow graph contains a throttle block and another rate
>>> limiting block, e.g. a hardware source or sink. This is usually undesired.
>>> Consider removing the throttle block.
Executing: /usr/bin/python3 -u /home/sezer/Masaüstü/tx_ofdm.py
ERROR: Unable to find host: İsim ya da servis bilinmiyor
ERROR: Unable to find host: İsim ya da servis bilinmiyor
Traceback (most recent call last):
File "/home/sezer/Masaüstü/tx_ofdm.py", line 395, in <module>
main()
File "/home/sezer/Masaüstü/tx_ofdm.py", line 371, in main
tb = top_block_cls(uri=options.uri)
File "/home/sezer/Masaüstü/tx_ofdm.py", line 191, in __init__
self.iio_pluto_source_0 = iio.pluto_source(uri, 2400000000, 2084000,
20000000, 32768, True, True, True, 'manual', 64, '', True)
File "/usr/lib/python3/dist-packages/iio/iio_pluto_source_swig.py", line 92,
in make
return _iio_pluto_source_swig.pluto_source_make(*args, **kwargs)
RuntimeError: Unable to create context
>>> Done (return code 1)
Generating: '/home/sezer/Masaüstü/tx_ofdm.py'
>>> Warning: This flow graph contains a throttle block and another
>>> rate-limiting block, e.g. a hardware source or sink. This is usually
>>> undesired. Consider removing the throttle block.
Executing: /usr/bin/python3 -u /home/sezer/Masaüstü/tx_ofdm.py
WARNING: Unknown parameter '0' in <context>
WARNING: Unknown parameter '23' in <context>
WARNING: Unknown parameter 'v0.23' in <context>
gr::log :INFO: packet_headerparser_b0 - Detected an invalid packet at item 0
gr::log :INFO: header_payload_demux0 - Parser returned #f
gr::log :INFO: packet_headerparser_b0 - Detected an invalid packet at item 48
gr::log :INFO: header_payload_demux0 - Parser returned #f
gr::log :INFO: packet_headerparser_b0 - Detected an invalid packet at item 96
gr::log :INFO: header_payload_demux0 - Parser returned #f
gr::log :INFO: packet_headerparser_b0 - Detected an invalid packet at item 144
gr::log :INFO: header_payload_demux0 - Parser returned #f
gr::log :INFO: packet_headerparser_b0 - Detected an invalid packet at item 192
gr::log :INFO: header_payload_demux0 - Parser returned #f
gr::log :INFO: packet_headerparser_b0 - Detected an invalid packet at item 240
gr::log :INFO: header_payload_demux0 - Parser returned #f
gr::log :INFO: packet_headerparser_b0 - Detected an invalid packet at item 288
I think the periodic item is 48 and plus,
Are the same faults with other SDRs?
---------- Forwarded message ---------
Gönderen: Marcin Puchlik
<m.puch...@is-wireless.com<mailto:m.puch...@is-wireless.com>>
Date: 16 Ara 2021 Per, 17:15
Subject: Re: ofdm adalm-pluto
To: Özkan Sezer <ozkanse...@gmail.com<mailto:ozkanse...@gmail.com>>
Cc: GNURadio Discussion List
<discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org>>
Hi,
Is this a periodic problem with the same packets?
Marcin
czw., 16 gru 2021 o 14:54 Özkan Sezer
<ozkanse...@gmail.com<mailto:ozkanse...@gmail.com>> napisał(a):
Hi Marcus,
Thanks for your answer, yes it's unexpected because the transmitter and
receiver are so
close. OFDM block same as gr-digital; is the extra spec for Adalm-pluto SDR?
--
Özkan SEZER
