On Mon, Jul 12, 2010 at 02:18:43PM +0100, Bob Cowdery wrote: > Hi, > > I've just started investigating the possibility of building a > source/sink to a USB device. I've read the 'How to Write a Signal > Processing Block', built GNURadio on Ubuntu 10.04 and played around a > bit with building the example gr-how -to-write-a -block. I've also had a > cursory look at the usrp directories. I'm looking for a little bit of a > leg-up to kick me off. I'm assuming that the structure of the usrp2 > directories would be the best place to start. I have noticed that the > document 'How to Write a Signal Processing Block' shows a different > directory structure to that in the code example and the usrp directories > are different again. There is also a gr-usrp2 and usrp2 and it's not > immediately obvious to me how they are split up and why.
usrp2 provides a non-GNU Radio specific interface to the usrp2. gr-usrp2 builds on usrp2 and implements the actual sources and sinks. > 1. Which would be the best structure to take as a template and do I need > both structures as in usrp2. Easiest way to get the build framework started is to run $ create-gnuradio-out-of-tree-project <my-module-name> It will create a directory tree starting with <my-module-name> > 2. Most of the documentation talks about processing blocks, sources and > sinks. Is there anything that talks about a device which is both a > source and a sink or do I need to trawl through the usrp code to see how > to handle that. The usrp code is a reasonable place to start your study. It's probably more complicated than you need, but then the USRP is really flexible. You should be able to use the fast usb classes as is. Good luck! Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
