Thanks Eric, that makes sense. I expect to go around the houses a bit on this but I have working C code so essentially first off I just need to code the interfaces. I guess therefore I have the equivalent of usrp2 and need to do a somewhat simplified version of gr-usrp2.
Bob On 12/07/2010 20:17, Eric Blossom wrote: > 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
