osmocom-sdr

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903 discussions

Fwd: Calculation of allowed vco frequency in osmocom sources

by Harald Welte

Hi all, with permission of its author, I'm forwarding this message to the list. Regards, Harald -- - 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)

13 years, 1 month

Sources for VHDL and FPGA flashing committed

by Christian Daniel -- maintech GmbH

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello everybody, I've committed the VHDL source code and the needed projects files for Lattice Diamond into the repository. With this everybody can build a FPGA image for the OsmoSDR. The most important feature in this new FPGA firmware version is, that we now have an integrated decimation filter, which can be configured in from 1:2 to 1:64. I have added a tool to convert the files, that Lattice Diamond produces to something we can upload via USB DFU and I also modified the DFU loader to include FPGA flashing support. Since the post office was already closed yesterday and today we had a holiday in Germany, the boards will find their way to the mail tomorrow. Best regards, Christian - -- - --------------------------------------------------- | maintech # Dipl. Inf (FH) Christian Daniel | | GmbH ### Otto-Hahn-Str. 15 · D-97204 Höchberg | - --------------------------------------------------- | AG Würzburg, HRB 8790 Tax-ID DE242279645 | - --------------------------------------------------- | http://www.maintech.de cd(a)maintech.de | - --------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPtWY8AAoJEHkgzUIsAWrig/oH/2b9oummF4S/gDN/A6SlIIf4 ppmcg+j+gLCJ7n2Otpb/eq+Uk8BK8NgFu0qlaWVSJ9q2HtHXGsxzUFnkRGRNIjjv I8DIImuUiDpUXfiX/mQEe9kGNJwJIcCB4ulFHeU8EDo7NcbI/O8nHQQOtX46Uegl yzdkqw9KaPJxeABdsa9PzTKOvWDigMrWw6IEibJRqrMVkAOxHby2084NqFQPNLze +f/uSQ4FW64hlc0Gli5nyXGR10CaY8/SXTP7VTNtI3Gnjwvf4VcKkCFrFLR9/UZE +4HuIXu0JMX3jFTF72ttwKG+oGxk9G+IorTgW+VUzKJ2ni+D0Zy8zaCAjnNBYOg= =ykxM -----END PGP SIGNATURE-----

13 years, 1 month

PATCH: Remove pow() and math.h from rtl-sdr.

by Christian Vogel

Hi, apparently #include <math.h> is only needed for the declaration of pow(2,22) used in rtlsdr_set_sample_rate(). Now gcc is smart enough to convert pow(2,22) to a constant, but for example clang isn't, and it complains about the missing math library. Attached patches replace pow(2,22) by (float)1<<22 and remove the math headers. Chris [tort /home/chris/rtl-sdr (b345963947b451f6…)] $ make (...) ./.libs/librtlsdr.so: undefined reference to `exp2' collect2: ld returned 1 exit status clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [rtl_sdr] Error 1 make[2]: Leaving directory `/home/chris/rtl-sdr/src'

13 years, 1 month

OsmoSDR developer beta

by Harald Welte

Hi all! There are something like 16 units of OsmoSDR that we are able to sell in something like one week. Sale will happen via the https://shop.sysmocom.de/ webshop. However, as there are only 16 units right now, and as the firmware and host software is in an incomplete state, we would like to make sure that those 16 units get sold to people who actually have an interest (and time!) to fix and improve the current shortcomings. So if you want to be among the first 16, I suggest you reply to this message and give us a short description of who you are (if you are not a Osmocom regular) as well as some committment that you are actually going to work on improving the code. If you already know an area that you'd like to work on, please state that, too. The price will be 180 EUR incl. VAT (that's 151.26 EUR without), i.e. the same price as for the units that will later be sold openly. I have put together a wiki page with the current status at http://sdr.osmocom.org/trac/wiki/OsmoSDR/Status to make you aware where we are and what is missing. Thanks in advance for your willingness to be early users and help us to improve the codebase. Regards, Harald -- - 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)

13 years, 1 month

[PATCH 2/2] #include <math.h> was not needed.

by Christian Vogel

--- src/rtl-sdr.c | 1 - src/rtl_sdr.c | 1 - src/rtl_tcp.c | 1 - 3 files changed, 0 insertions(+), 3 deletions(-) diff --git a/src/rtl-sdr.c b/src/rtl-sdr.c index da79acb..b6f9163 100644 --- a/src/rtl-sdr.c +++ b/src/rtl-sdr.c @@ -22,7 +22,6 @@ #include <string.h> #include <stdio.h> #include <stdlib.h> -#include <math.h> #ifndef _WIN32 #include <unistd.h> #define min(a, b) (((a) < (b)) ? (a) : (b)) diff --git a/src/rtl_sdr.c b/src/rtl_sdr.c index fed0d30..98d5fc5 100644 --- a/src/rtl_sdr.c +++ b/src/rtl_sdr.c @@ -21,7 +21,6 @@ #include <string.h> #include <stdio.h> #include <stdlib.h> -#include <math.h> #ifndef _WIN32 #include <unistd.h> diff --git a/src/rtl_tcp.c b/src/rtl_tcp.c index 3cea790..7cfd524 100644 --- a/src/rtl_tcp.c +++ b/src/rtl_tcp.c @@ -22,7 +22,6 @@ #include <string.h> #include <stdio.h> #include <stdlib.h> -#include <math.h> #ifndef _WIN32 #include <unistd.h> -- 1.7.0.4 --dDRMvlgZJXvWKvBx--

13 years, 1 month

[PATCH] Using a #define for constant 2^22 (not pow())

by Christian Vogel

pow() might require the math library to be linked with rtl-sdl (e.g. when compiling with clang), even though it's actually constant. --- src/rtl-sdr.c | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) diff --git a/src/rtl-sdr.c b/src/rtl-sdr.c index 6a9539b..da79acb 100644 --- a/src/rtl-sdr.c +++ b/src/rtl-sdr.c @@ -675,6 +675,9 @@ int rtlsdr_set_tuner_gain_mode(rtlsdr_dev_t *dev, int mode) return r; } +/* two raised to the power of n */ +#define TWO_POW(n) ((double)(1ULL<<(n))) + int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate) { uint16_t tmp; @@ -688,10 +691,10 @@ int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate) if (samp_rate > MAX_SAMP_RATE) samp_rate = MAX_SAMP_RATE; - rsamp_ratio = (dev->rtl_xtal * pow(2, 22)) / samp_rate; + rsamp_ratio = (dev->rtl_xtal * TWO_POW(22)) / samp_rate; rsamp_ratio &= ~3; - real_rate = (dev->rtl_xtal * pow(2, 22)) / rsamp_ratio; + real_rate = (dev->rtl_xtal * TWO_POW(22)) / rsamp_ratio; if ( ((double)samp_rate) != real_rate ) fprintf(stderr, "Exact sample rate is: %f Hz\n", real_rate); -- 1.7.0.4 --dDRMvlgZJXvWKvBx Content-Type: text/x-diff; charset=us-ascii Content-Disposition: attachment; filename="0002-include-math.h-was-not-needed.patch"

13 years, 1 month

why Docs for the ELONICS E4000 are not published

by Jay Salsburg

Is the reason why Docs for the ELONICS E4000 are not published because it is Chinese? If anyone has the Datasheets for the ELONICS E4000 and REALTECH RTL2832, please share them to osmocom-sdr(a)lists.osmocom.org or post them to http://sdr.osmocom.org/trac/wiki/Hardware Thanks

13 years, 1 month

Recent librtlsdr and example program don't work

by Andrea Montefusco

After about a month, I refreshed the local git sandbox but I was not anymore able to receive any sample, even with the test program. I am using a Terratec NOXON DAB/DAB+ USB dongle (rev 1) on Ubuntu 11.10 x86_64 . ./rtl_sdr - Found 1 device(s): 0: Terratec NOXON DAB/DAB+ USB dongle (rev 1) Using device 0: Terratec NOXON DAB/DAB+ USB dongle (rev 1) Found Fitipower FC0013 tuner Tuned to 100000000 Hz. Tuner gain set to -1.000000 dB. Reading samples in async mode... but I can get no output. *am* --------------------------------------------------------- Andrea Montefusco iw0hdv http://www.montefusco.com tel: +393356992791 fax: +390623318709 ---------------------------------------------------------

13 years, 1 month

Re: OT: usb hub power switching (Re: Recent librtlsdr and example program don't work)

by Dieter Spaar

Hello Peter, On Tue, 8 May 2012 23:47:33 +0200, "Peter Stuge" <peter(a)stuge.se> wrote: > > Yes, I haven't seen it available in any userspace API on any system. :\ > > It may be possible to send the request to the hub from userspace, but > I haven't tried it. Older Windows Version (before Vista) had IOCTL_USB_HUB_CYCLE_PORT to perform a power cycle. I think there is still a way in newer version too, If I am not wrong the WHQL driver testings tools do perform USB power cycles frequently when testing USB devices. Of course the above is only relevant if you care about Windows ;-) Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

13 years, 1 month

RTL2832 questions

by Jeff Gustafson

Hi all, First of all, props to the person that found out how to put the RTL chip into a SDR compatible mode! I've been wanting to play around with SDR and, specifically, P25 for a while now. Finally an inexpensive way to get my feet wet. My question is probably a bit of a noob question. I have successfully received a broadcast FM radio station with the RTL dongle. The problem is that I can't seem to decode anything else. I tried to receive some ham radio (NFM) transmissions from my radio and I didn't get any sound. The white noise blanked out, the scope in gnuradio spiked up, but no real demodulation. Would someone be willing to share a .grc file they know will decode NFM with the gr-osmosdr/rtl-sdr driver? I tried taking some files that used the USRP driver and swapping out the USRP driver with the osmosdr/rtl driver, but no go. Could it be that I don't have all the sampling rates and decimation rates set correctly? ...Jeff

13 years, 1 month

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