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SV: [Discuss-gnuradio] fundamentals of block-connections, message queue

From: Ulrika Uppman
Subject: SV: [Discuss-gnuradio] fundamentals of block-connections, message queue etc.
Date: Thu, 27 Aug 2009 17:00:57 +0200

 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?


-----Ursprungligt meddelande-----
Från: Douglas Geiger [mailto:address@hidden 
Skickat: den 26 augusti 2009 19:33
Till: Ulrika Uppman
Kopia: GNU Radio Discussion
Ämne: Re: [Discuss-gnuradio] fundamentals of block-connections, message queue 

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

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