Hi Patrik, Firstly I should point out that the underlying I2C code has come from the rtl-sdr tool: http://sdr.osmocom.org/trac/wiki/rtl-sdr
Which in turn (I believe) uses the tuner control source from the Linux kernel RTL2832 V4L/USB DVB drivers. That source is also found at https://github.com/mbarbon/rtl2832.git (works with 2.6) and https://gitorious.org/rtl2832 (looks like 3.0, and potential IR support). Unfortunately I understand the datasheets for both the demod and tuner chips are under NDA, so we can only go on what is already out there. This is a real shame, because I get the feeling there are some other mysteries in the demod chip's signal chain that ought to be switched off to get the most out of this as a cheap SDR receiver. All we can do at the moment is experiment with the available source and see what happens... If anyone else knows more, please spill the beans! :) Kind regards, Balint PS: I'm just in the process of adding support for more tuners, e.g. FC0012. > -----Original Message----- > From: Patrik Tast [mailto:pat...@poes-weather.com] > Sent: Sunday, 1 April 2012 9:19 PM > To: Balint Seeber; discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] RTL2832 ($20 USB SDR) support now in gr- > baz > > Hi Balint, > > Good job! > > Would it be possible to also git the I2C command document that you used to > "tame" the RTL2832 or a link to it in the README? > > Thanks, > Patrik > > ----- Original Message ----- > From: "Balint Seeber" <balint...@gmail.com> > To: <discuss-gnuradio@gnu.org> > Sent: Friday, March 30, 2012 4:43 > Subject: Re: [Discuss-gnuradio] RTL2832 ($20 USB SDR) support now in gr- > baz > > > > Hi Rafael, > > > > The intention for upstream submission is certainly there, however time > is > > not quite... hopefully soon. > > > > Some blocks need optimisation, cleaning and re-styling - if anyone > wishes > > to > > help by sending a patch, that would be wonderful (I just received my > first > > a > > little while ago!). > > > > Re: getting the dongle, I happened to get lucky on eBay. I can only > > suggest > > to keep searching! Good luck. > > > > Kind regards, > > Balint > > > > PS: Lots happening here: http://www.reddit.com/r/RTLSDR/ > > And > > > http://www.reddit.com/r/amateurradio/comments/rjp8v/20_ultracheap_software > _d > > efined_radio_with_rtl2832/ > > > >> -----Original Message----- > >> From: discuss-gnuradio-bounces+balint256=gmail....@gnu.org > >> [mailto:discuss-gnuradio-bounces+balint256=gmail....@gnu.org] On Behalf > >> Of > >> Rafael Diniz > >> Sent: Friday, 30 March 2012 3:43 AM > >> To: discuss-gnuradio@gnu.org > >> Subject: Re: [Discuss-gnuradio] RTL2832 ($20 USB SDR) support now in > gr- > >> baz > >> > >> Indeed, F****ng awesome! > >> Do you plan to submit upstream your gr-baz? > >> > >> People, in dealextreme store the dongle is sold out. > >> I do not want to start an off-topic trend, but could you please mail me > >> in > >> private where are you buying such dongle? > >> > >> Best regards, > >> Rafael Diniz > >> > >> > Awesome! I'm still waiting on my RTL-based card to arrive via > >> > snail-mail from an unknown factory on the other side of the world. > >> > Will test when it arrives! > >> > > >> > From: discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org > >> > [mailto:discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org] > >> > On Behalf Of Balint Seeber > >> > Sent: Thursday, March 29, 2012 11:22 AM > >> > To: discuss-gnuradio@gnu.org > >> > Subject: [Discuss-gnuradio] RTL2832 ($20 USB SDR) support now in > >> > gr-baz > >> > > >> > Hi folks, > >> > > >> > I've just added RTL2832 support to gr-baz with support for both > tuners > >> > (Elonics E4000 and Fitipower FC0013). > >> > > >> > If you're not aware, this is sold as a DVB-T USB receiver for ~$20, > >> > which is a pretty decent price for a device that can do general > >> > purpose SDR at > >> > 3.2 MHz and 8-bits! The journey starts with Antti > >> > Palosaari<http://thread.gmane.org/gmane.linux.drivers.video-input- > infr > >> > astructure/44461/focus=44461> who discovered it can be put in a mode > >> > where it streams baseband data directly over USB (for analog FM > >> > demodulation in software). This resulted in Steve Markgraf's > >> > rtl-sdr<http://sdr.osmocom.org/trac/wiki/rtl-sdr> > >> > user-space capture utility over at Osmocom (see the Osmocom page to > >> > find compatible devices). > >> > > >> > I've taken that source and created a fully-featured GNU Radio Source > >> > block > >> > 'baz.rtl_source_c'<http://wiki.spench.net/wiki/Gr-baz#rtl_source_c> > >> > (with GRC block) that outputs complex values, and allows adjustment > of > >> > frequency, sample rate and LNA gain. There is also an optional > >> > automatic tuner mode control for the E4000. If you also like using > >> > Winrad/HDSDR/WRplus, my ExtIO > >> > plugin<http://wiki.spench.net/wiki/USRP_Interfaces> now has support > >> > for the device too. The Source block performs internal multi-threaded > >> > buffering for smoother performance (this might be over-engineered, > but > >> it seemed to help with the ExtIO plugin). > >> > > >> > You can get the source code from my > >> > SVN<http://svn.spench.net/main/gr-baz/> or > >> > github<https://github.com/balint256/gr-baz> (though please visit the > >> > info page<http://wiki.spench.net/wiki/Gr-baz#rtl_source_c> first for > >> > more info/pre-reqs - e.g. libusb-1.0, etc). It's experimental, and > not > >> > the prettiest because I actually ported it back from the ExtIO > plugin, > >> > but it works for me and if you want to help test/clean it up then > that > >> > would be very much appreciated! > >> > > >> > To see it in action, have a peek here: http://youtu.be/FUQd9HOVTk8 > >> > > >> > Balint @spenchdotnet<http://twitter.com/spenchdotnet> > >> > _______________________________________________ > >> > Discuss-gnuradio mailing list > >> > Discuss-gnuradio@gnu.org > >> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >> > > >> > >> > >> > >> _______________________________________________ > >> Discuss-gnuradio mailing list > >> Discuss-gnuradio@gnu.org > >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
