osmocom-sdr

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904 discussions

[notifications@github.com: [rtl-sdr] drop option -a and be independent from interface ip-address (#2)]

by Harald Welte

somebody sending pull requests to a mirror of the official repository... -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

9 years, 2 months

Time to rename projects.osmocom.org to osmocom.org

by Holger Freyther

Hi, I think we all liked tnt's proposal to just call it osmocom.org. Are we ready to make the redmine available as osmocom.org (and redirect www.osmocom.org, projects.osmocom.org to it)? As first step of redirects I propose: http://bb.osmocom.org/ -> http://osmocom.org/projects/baseband http://openbsc.osmocom.org/ -> http://osmocom.org/projects/openbsc http://tetra.osmocom.org/ -> http://osmocom.org/projects/tetra http://simtrace.osmocom.org/ -> http://osmocom.org/projects/simtrace http://security.osmocom.org/ -> http://osmocom.org/projects/security http://gmr.osmocom.org/ -> http://osmocom.org/projects/gmr http://sdr.osmocom.org/ -> http://osmocom.org/projects/sdr any objections or corrections to that? kind regards holger

9 years, 3 months

AirSpy & sdr tools ?

by Jean-Paul Le Fèvre

Hi, After having played with a DX-Patrol device for a while using the sdr tools (sdr_tcp, sdr_fm, etc.) I've purchased an AirSpy and I would like to experiment with it. However reading the GrOsmoSDR page I see that AirSpy is supposed to be supported by the gr-osmosdr library but on the other hand the wiki page rtl-sdr does not mention it. I've recompiled the file librtlsdr.c after having added the id product and vendor of the AirSpy in the code. But I figure out that it is not sufficient and even maybe that it does not make sense. Is there a way to make the sdr tool set (sdr_*) compatible with the AirSpy ? -- Jean-Paul Le Fèvre - CEA Saclay Irfu Svom Scientific Ground Segment project manager

9 years, 3 months

[PATCH] allow both >=3.7.4 and git version of GnuRadio

by P

This patch make GnuRadion version less strict and allows build with GnuRadio 3.8 (current git version). It makes live more bearable for those of us who live on bleeding edge. P

9 years, 3 months

Airspy patch to enable USB bit packing

by Martin Smith

Last July there were several changes made to the Airspy firmware and libairspy that added support for a new bit packing mode where 4 sets of 12 bit samples are packed into 3 sets of 16 bits for the transfer across the USB bus ( https://i.imgur.com/qXnWoEK.png?1 ). 25% less data is transferred across the bus and this is good for some computers with cheap USB chipsets. There is an overhead of extra memory bandwidth required on the host side to unpack the data into a useful format, so for optimal performance bit packing is disabled by default. The data is automatically unpacked within libairspy before being passed along, so no changes are required anywhere else if packing is enabled (or not enabled). Airspy firmware older than v1.0.0-rc6 does not have the function, but that is detected and handled by libairspy. I wrote the attached patch to enable packing in gr-osmosdr, which I tested and it works. It is basically a clone of the bias=0|1 lines as pack=0|1 and calls the needed libairspy function. ref: https://github.com/airspy/firmware/commit/7e1806b https://github.com/airspy/firmware/commit/5b7dcab https://github.com/airspy/host/commit/a51eccb --- Do some Baseline test with Airspy command line tools to have something to compare USB throughput results -------------------------------------------------------------------------------------------------------- $ sudo mount -t debugfs none /sys/kernel/debug $ sudo modprobe usbmon $ wireshark -i usbmod3 & $ airspy_info ; sleep 120 ; \ airspy_rx -t 4 -r /dev/null -n 2400000000 ; sleep 120 ; \ airspy_rx -t 4 -r /dev/null -p 1 -n 2400000000 ; sleep 120 ; \ airspy_info Wireshark->Statistics->IO Graph The Bytes/Tick are double the actual data rate because of way wireshark collects the USB packets, I could have added a filter to fix this. But the relationship is valid 25% less with packing enabled. The data rate in the IO Grahp drops from 80MB/sec (in+out) [really 40MB/sec] to 60MB/second (in+out) [really 30MB/sec] from unpacked to packed. 10MSPS no packing, packing https://i.imgur.com/pA9LPdE.png?1 2.5MSPS no packing, packing https://i.imgur.com/lA8q5aq.png?1 Verification test with my patched gr-osmosdr -------------------------------------------- $ sudo mount -t debugfs none /sys/kernel/debug $ sudo modprobe usbmon $ wireshark -i usbmod3 & $ osmocom_fft -a "airspy=0" -s 10000000 --fft-rate=1 $ osmocom_fft -a "airspy=0,pack=1" -s 10000000 --fft-rate=1 $ osmocom_fft -a "airspy=0" -s 2500000 --fft-rate=1 $ osmocom_fft -a "airspy=0,pack=1" -s 2500000 --fft-rate=1 $ osmocom_fft -a "airspy=0" -s 2500000 --fft-rate=1 $ osmocom_fft -a "airspy=0,pack=0" -s 2500000 --fft-rate=1 I ran all of the above tests and the wireshark USB throughput graphs showed exactly what was expected. 40MB/sec(10MSPS+normal),30MB/sec(10MSPS+packing),10MB/sec(2.5MSPS+normal),7.5MB/sec(2.5MSPS+packing),10MB/sec(2.5MSPS+normal),10MB/sec(2.5MSPS+normal). 25% less when packing was enabled and if you did not specify the "pack=1", then no bit packing is performed by libairspy. All the magnitudes within the FFT windows looked exactly the same as they do without bit packing.

9 years, 3 months

rtl_test

by Ashish Kurian

Hi, When I run the command rtl_test I get the message like Reading samples in async mode and then there is no output. But when I give commands like rtl_test -p I get the expected output. Please help me in fixing this issue. Best Regards, Ashish Kurian

9 years, 4 months

Building rtl-sdr under mingw64

by Momchil Ivanov

Hi, I was trying to build rtl-sdr on windows using mingw64 and stumbled upon the error described here [1] [ 40%] Building C object src/CMakeFiles/rtl_adsb.dir/rtl_adsb.c.o Linking C executable rtl_adsb.exe libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x1e5): undefined reference to `rtlsdr_set_tuner_gain_mode' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x1e5): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `rtlsdr_set_tuner_gain_mode' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x1fb): undefined reference to `rtlsdr_get_tuner_gains' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x1fb): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `rtlsdr_get_tuner_gains' and so on.... I was able to build rtl-sdr using the attached patch. I exchange the order of linking libraries. 1: http://lists.osmocom.org/pipermail/osmocom-sdr/2015-April/000048.html Greetings, Momchil

9 years, 4 months

Status of Hardware

by Mark Richards

Greetings. As I am looking to build a multi-channel NBFM communications recording device for a public service event, I'd like to know the status of the Osmocom hardware. I can use the RTL-SDR, but perhaps a board with more horsepower would be good. /K1MGY

9 years, 4 months

[patch]: rtl_sdr, fix -n parameter

by Henk

Fix bytes_to_read adjustment in callback. For example bug exposes itself with: rtl_sdr -f 100e6 -s 2048000 -n 245.76e6 /tmp/100M.iq and does not terminate after the expected 245.76e6 samples. Which is an exact multiple of "out_block_size". Signed-off-by: Henk vergonet <henk.vergonet(a)gmail.com>

9 years, 4 months

Ubuntu+Windows binaries for GNURadio/GrOsmo

by Josh Blum

Hey list, This is an update and an announcement: Alexandru Csete and I have been maintaining an Ubuntu PPA for SDR community software for some time. We just updated to GNU Radio 3.7.9 and GrOsmoSDR with RedPitaya support. The goal of the PPA is to have have recent releases of community software (SDR drivers, GNU Radio, and related projects) across several versions of Ubuntu. Simply follow the apt-get instructions here: http://wiki.myriadrf.org/Packaging I figure that a lot of people (both developers and users) can benefit from the shared effort. If you find a bug, have a request, or want to get involved; please let us know, we would love to hear it: https://discourse.myriadrf.org/c/projects/packaging On the windows side of things, I am pleased to announce the PothosSDR installer/development environment; which now includes around 40 open source projects. We just updated to the latest GNURadio/GrOsmoSDR, and recently additions include GQRX, gr-rds, and zeromq support. Instructions for GNURadio/GRC and GQRX users: https://github.com/pothosware/PothosSDR/wiki/GNURadio https://github.com/pothosware/PothosSDR/wiki/GQRX Special thanks to Andrew Back and Myriadrf for all of the support and hosting the software! Thanks, -josh

9 years, 4 months

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