Forum: GNU Radio Adding functionality to a GRC-generated flowgraph

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Marcus D. Leech (Guest)
on 2009-02-21 21:39
(Received via mailing list)
Josh, etc al:

What is the best way to "tack on" functionality to a GRC-generated
flowgraph--that is, things that are outside of
  the Gnu Radio "environment" but still important to your application.

I'd like to add things like a timeout function that "does things" from
time to time, as well as other important tasks, initializations,
  etc.

--
Marcus L.
Principal Investigator, Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
Josh B. (Guest)
on 2009-02-21 23:20
(Received via mailing list)
Not entirely sure what you talking about, but you can add a custom block
wrapper for basically anything. It doesnt have to be a real gr block.
Make a custom block wrapper without any inputs or outputs, and put your
special code in the <make>blah</make> that instantiates your object.

A good example is the xmlrpc server:
http://gnuradio.org/trac/browser/gnuradio/trunk/gr...
Its not a signal processing block, but it will start an xmlrpc server
and a thread inside your flow graph.

If your code is more complicated than that, you can encapsulate anything
into a python module, install it into the python path, and instantiate
it using the block wrapper <make>.

-josh
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