osmocom-sdr April 2018

osmocom-sdr@lists.osmocom.org

15 participants
16 discussions

by Justin Kelly

can the USB to VGA adapter output quadrature I and Q pairs via the red and blue channels? with maybe using green as a configurable local oscillator. -Justin -- --Evil people do evil things, how is irrelevant.

7 years, 1 month

osmo-fl2k

by Riccardo Rossi

Hi, i want to ask you which screen do you use in the picture in the website and also if this https://www.amazon.it/dp/B019DUI17Q/ref=cm_sw_r_wa_api_i_on53AbMBGRVYA has the correct chip Thank you Riccardo Rossi

7 years, 1 month

fl2k RGB buffer format

by Abhishek Goyal

I am trying to understand the layout of the RGB buffers sent to the fl2k over USB. From lines 755-820 in libosmo-fl2k.c I can see the RGB buffers are "serialized" in this order: g1,r1,b2,g2,b0,g0,r0,b1,b4,g4,r4,b5,r2,b3,g3,r3,r6,b7,g7,r7,g5,r5,b6,g6 (where r0 is the red component of first pixel, b3 is the blue component of fourth pixel, etc) What is this layout? Why does the chip expect the pixels to be sent in this order?

7 years, 1 month

Bug: gr-osmoscom for USRP B210 have this weird center frequency signal while gr-UHD don't

by Ignatius Rivaldi

Hi, At first I reported this bug at Gqrx mailing list: https://groups.google.com/forum/#!topic/gqrx/pVea3JObMLw , then Csete mentioned that Gqrx uses gr-osmosdr source, while I'm using gr-uhd source. Then I tried it again using osmocom source, then that weird center frequency noise appears again. I've attached several screenshots and GRC flowchart that I used to reproduce this bug (it uses gr-fosphor). Maedhros_008.png is the screenshot of gr-fosphor displaying the correct UHD: USRP source, with all of FM broadcast radio visible, while Maedhros_011.png is the gr-fosphor showing the output of osmocom source, with this big ~2MHz spike at center frequency, and all of those FM broadcast radio are not visible. I'm using Arch Linux with gnuradio, gr-fosphor, and gr-osmosdr compiled from source using makepkg/pkgbuild system, and libuhd 3.10.2.0-3

7 years, 1 month

Gnuradio >= 3.7.12.0 breaks gr-fosphor

by Ignatius Rivaldi

Hi, A QT API change in Gnuradio 3.17.12.0 : https://github.com/gnuradio/gnuradio/pull/1418 breaks modules that relies on QT windowing system, resulting in Template error on generated python file, resulting in this error when I try to run the generated python file: Executing: /usr/sbin/python2 -u /home/feanor/Development/SDR/top_block.py File "/home/feanor/Development/SDR/top_block.py", line 69 self.fosphor_qt_sink_c_2 = Template error: #set $win = 'self._%s_win'%$id ^ SyntaxError: invalid syntax >>> Done (return code 1) This also affects other modules that relies on QT: gr-inspector: https://github.com/gnuradio/gr-inspector/issues/2 Following the fix in this pull request for gr-inspector: https://github.com/gnuradio/gr-inspector/pull/21/commits/9d00bb83c155c84ee8… by changing a line: 15c15 < $(gui_hint()($win))</make> --- > $(gui_hint() % $win)</make> fixes the problem for gr-fosphor and make the flowgraph runnable again

7 years, 2 months

windows GNU Radio error 12 Fatal failed to find rtlsdr device

by Jose Mihotek

All, I installed GNU Radio for windows on my machine running Windows 10.when I try to run GRC it comes back with: <<< Welcome to GNU Radio Companion 3.7.11.1 >>> Block paths: C:\Program Files\GNURadio-3.7\share\gnuradio\grc\blocks Loading: "C:\Users\JoseM\Documents\GNU\test w grc.grc">>> Done Generating: 'C:\\Users\\JoseM\\Documents\\GNU\\top_block.py' Executing: C:\Program Files\GNURadio-3.7\gr-python27\python.exe -u C:\Users\JoseM\Documents\GNU\top_block.py Win32; Microsoft Visual C++ version 14.0; Boost_106000; UHD_003.010.001.001-0-unknown gr-osmosdr c653754d (0.1.5git) gnuradio 3.7.11.1built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf bladerf airspy redpitaya Using device #0 Generic RTL2832U OEMusb_open error -12 FATAL: Failed to open rtlsdr device. Trying to fill up 1 missing channel(s) with null source(s).This is being done to prevent the application from crashingdue to gnuradio bug #528. Anybody have any idea how to fix this ?Thanks, Jose

7 years, 2 months

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osmocom-sdr April 2018