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Re: [Discuss-gnuradio] GNU Radio conditional operation

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] GNU Radio conditional operation
Date: Wed, 27 Apr 2011 12:40:37 -0400
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20110303 Thunderbird/3.1.9

On 27/04/2011 12:27 PM, Songsong Gee wrote:
Thank you for your answer.

I have one more question,
In that directory, there are lots of python script,
Unfortunately, I'm not good at that language
and I have just learned GNU Radio with GRC

Is that what I wanted now available in GRC?

Generally, custom processing blocks, which is what you'll likely be having to do, are written in C++.

In Gnu Radio, the Python is used as a kind of "glue" that sets up and "manages" flow-graphs, but the underlying signal-processing elements, and buffer and task scheduling is generally handled in C code. The vast majority of those blocks have mappings into Python (via Swig) to allow the Python
  ``management` structure to manage them.

GRC emits Python code, using the underlying Gnu Radio conventions and mechanisms to form a flow-graph.

Blocks you write yourself can be ``manifested`` (via Swig) into Python, and then ``manifested`` via XML into

The XML that GRC uses exists as a way of describing the ``surface`` of a processing block, and also as a way of describing the Python code that must be emitted in order to plug the block into the overall flow-graph.

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