How vector sink/source work?

GNU Radio
1

hi,
I have data below
src_data = (0,1,1,0,1,0,1,0,1,1,10)
and I put them in a vector by using
src = gr.vector_source_b (src_data,False) .
I want to put this vector in vector sink and read data in sink, I use
commands below
sink = gr.vector_sink_b()
fg.connect(src,sink)
sink_data = sink.data()
print sink_data

but what is printed is : ()

kindly tell me how can I see data of sink.

Regards,
Mehdi

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2

Hello Mehdi

looks to me like you forgot to run() your application:

src_data = (0,1,1,0,1,0,1,0,1,1,10)
src = gr.vector_source_b (src_data,False) .
sink = gr.vector_sink_b()
fg.connect(src,sink)

fg.run()

sink_data = sink.data()
print sink_data

Regards, Andreas

3

On Tue, Jun 17, 2008 at 02:52:32AM -0700, mehdimolu wrote:

sink_data = sink.data()
print sink_data

but what is printed is : ()

kindly tell me how can I see data of sink.

Regards,
Mehdi

You have to run the graph before extracting the data.

Take a look at any of the QA code in
gnuradio-core/src/python/gnuradio/gr/qa_*.py.
They all use vector sources and sinks.

Eric