Re: [Discuss-gnuradio] Check The output of a block & input captured frames to GNURadio

[Marcus Müller]

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Don't erase stuff because it takes time...
tb.wait() is necessary to let the top block wait for all the work to
finish.
GNU Radio flowgraphs will run until a) a block signals that it's done,
or b) the flow graph is stopped.
I think you want to use the "a)" approach. Add a Head block into your
flowgraph:
http://gnuradio.org/doc/doxygen/classgr_1_1blocks_1_1head.html

Your flow graph will then terminate after a specified number of
samples has passed the head block.

So what your program does is
tb.start()
tb.wait()
outpput=sink.data()

Greetings,
Marcus

On 29.03.2014 00:51, Sara Chérif wrote:
> I found that "tb.wait()" is written in the file so it takes too
> long time . Now after I erased tb.wait() .. the output on terminal
> is ---> ( ) .. I don't know why ?? Here is what is written in
> top_block.py
> 
> 
> #!/usr/bin/env python 
> ################################################## # Gnuradio
> Python Flow Graph # Title: Top Block # Generated: Sat Mar 29
> 01:47:01 2014 ##################################################
> 
> from gnuradio import blocks from gnuradio import eng_notation from
> gnuradio import gr from gnuradio.eng_option import eng_option from
> gnuradio.filter import firdes from grc_gnuradio import wxgui as
> grc_wxgui from optparse import OptionParser import wx
> 
> class top_block(grc_wxgui.top_block_gui):
> 
> def __init__(self): grc_wxgui.top_block_gui.__init__(self,
> title="Top Block") _icon_path =
> "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png" 
> self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
> 
> ################################################## # Variables 
> ################################################## self.samp_rate =
> samp_rate = 32000
> 
> ################################################## # Blocks 
> ################################################## 
> self.blocks_vector_source_x_0 = blocks.vector_source_b((6, 6), 
> True, 1, []) self.blocks_vector_sink_x_0 = blocks.vector_sink_b(1) 
> self.blocks_throttle_0 = blocks.throttle(gr.sizeof_char*1, 
> samp_rate,True)
> 
> ################################################## # Connections 
> ################################################## 
> self.connect((self.blocks_vector_source_x_0, 0), 
> (self.blocks_throttle_0, 0)) self.connect((self.blocks_throttle_0,
> 0), (self.blocks_vector_sink_x_0, 0))
> 
> 4,1           Top
> 
> # QT sink close method reimplementation
> 
> def get_samp_rate(self): return self.samp_rate
> 
> def set_samp_rate(self, samp_rate): self.samp_rate = samp_rate 
> self.blocks_throttle_0.set_sample_rate(self.samp_rate)
> 
> if __name__ == '__main__': import ctypes import sys if
> sys.platform.startswith('linux'): try: x11 =
> ctypes.cdll.LoadLibrary('libX11.so') x11.XInitThreads() except: 
> print "Warning: failed to XInitThreads()" parser =
> OptionParser(option_class=eng_option, usage="%prog: [options]") 
> (options, args) = parser.parse_args() tb = top_block() 
> tb.Start(True) print tb.blocks_vector_sink_x_0.data()
> 
> 
> 
> 2014-03-29 0:06 GMT+02:00 Sara Chérif <address@hidden>:
> 
>> I want to make a test and see the output , I put 3 blocks ,
>> vector source , throttle and vector sink . I edited the "vector"
>> parameter in vector source block to (6,6). All 3 blocks have a
>> type "byte". I generated the flow graph. I moved to the directory
>> of grc file , I wrote in terminal vim top_block.py then I write
>> to the end of file : " print tb.blocks_vector_sink_x_0.data()" 
>> and saved the changes . Then I execute the python file by writing
>> in terminal : ./top_block.py But the output takes too long time
>> and doesn't appear ! what is the problem ? and is there any other
>> method to see the output ???As I am a beginner and someone told
>> me this method. I tried this for example 10 times but every time
>> it takes too long and doesn't appear , only one time it appears!
>> 
>> Another question : If I have captured some frames using wireshark
>> (from twinkle softphone), and  I saved them .I want to make them
>> an input to ofdm transmitter . How to make them an input?
>> 
>> Thanks :)
>> 
>> 
> 
> 
> 
> _______________________________________________ Discuss-gnuradio
> mailing list address@hidden 
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
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