Thank you both very much for your responses Doug and Colby. I have now gone through the code in gr-usrp2 and usrp2/host thoroughly and I can see how the data is handled before sent on to the processing blocks.
I can also see that the metadata is discarded at a point, and I found some post in the archive about that this will be changed in later releases. I'm curious if anyone knows if this is something anyone is working on at the moment? /Ulrika -----Ursprungligt meddelande----- Från: Douglas Geiger [mailto:doug.gei...@bioradiation.net] Skickat: den 26 augusti 2009 19:33 Till: Ulrika Uppman Kopia: GNU Radio Discussion Ämne: Re: [Discuss-gnuradio] fundamentals of block-connections, message queue etc. As far as the usrp->gnuradio block goes - the frame to stream 'conversion' happens in the usrp (or usrp2) source block (and on the tx side that similarly gets hidden by the sink block). You can look in the gr-usrp (or gr-usrp2) directories to see how that happens. But in general, you don't have to worry about what format the samples get to/from the usrp in, that's taken care of by the gr-usrp blocks. For learning about some of the basics of GNURadio, I'd recommend looking at some of the simpler examples (802.11 is not the simplest standard to deal with) in the gnuradio-examples directories (the digital-bert example for example). -- Doug Geiger doug.gei...@bioradiation.net _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
