Consuming block of data in python block

GNU Radio
1

Hi list,

I’m trying to implement my first GNURadio block in python.

I followed the how_to_square_ff tutorial.

In that block, each input generates an output. Now what I want is to
change
this behavior so that the how_to_square_ff receives a block of data (512
for
example) and output only a single value (I know it is strange, but is
only
for learning purpose).

How I declare this in my block ?
Now the declaration is as follow:

gr.sync_block.__init__(
    self,
    name = "my_block",
    in_sig =  [numpy.float32], # Input signature: 1 float at a time

(want
512)
out_sig = [numpy.float32], # Output signature: 1 float at a time
)

Thanks

–
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http://gnuradio.4.n7.nabble.com/Consuming-block-of-data-in-python-block-tp39244.html
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2

On Tue, Jan 29, 2013 at 02:00:15PM +0800, Sreeraj Rajendran wrote:

              out_sig=[numpy.float32])

Also go through fixed/arbitrary ratio blocks in [2] for implementing blocks
with different rate.

$ gr_modtool -t decimator -l python BLOCKNAME

will take you there.

M

–
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin B.
Research Associate

Kaiserstraße 12
Building 05.01
76131 Karlsruhe

Phone: +49 721 608-43790
Fax: +49 721 608-46071
www.cel.kit.edu

KIT – University of the State of Baden-Württemberg and
National Laboratory of the Helmholtz Association

3

As Josh explained in [1] input can be anything that you can represent as
a numpy data type.

Try using something like

gr.block.init(self, name=“my block”,

in_sig=[numpy.dtype((numpy.float32,2))],

out_sig=[numpy.float32])

Also go through fixed/arbitrary ratio blocks in [2] for implementing
blocks with different rate.

[1]Vector inputs/outputs with GRExtras block interface - GNU Radio - Ruby-Forum
[2]Blocks Coding Guide · guruofquality/grextras Wiki · GitHub

-Sreeraj

From: maiconkist [email protected]
To: [email protected]
Sent: Tuesday, 29 January 2013 7:10 AM
Subject: [Discuss-gnuradio] Consuming block of data in python block

Hi list,

I’m trying to implement my first GNURadio block in python.

I followed the how_to_square_ff tutorial.

In that block, each input generates an output. Now what I want is to
change
this behavior so that the how_to_square_ff receives a block of data (512
for
example) and output only a single value (I know it is strange, but is
only
for learning purpose).

How I declare this in my block ?
Now the declaration is as follow:

gr.sync_block.init(
self,
name = “my_block”,
in_sig = [numpy.float32], # Input signature: 1 float at a time (want
512)
out_sig = [numpy.float32], # Output signature: 1 float at a time
)

Thanks

–
View this message in context:
http://gnuradio.4.n7.nabble.com/Consuming-block-of-data-in-python-block-tp39244.html
Sent from the GnuRadio mailing list archive at Nabble.com.