On Thu, Aug 9, 2012 at 1:53 PM, abdullah unutmaz <abdullahunut...@yahoo.com> wrote: > Greetings, > > I would like to ask you how to read the data stored in a vector sink. I > tried the solutions I found in the discussion list. You can see some part of > my python code below. > ------------------------------------------------------------------------------------------------------------------------------------------------------ > ################################################## > # Connections > ################################################## > self.connect((self.my_vec_src, 0), (self.my_thro, 0)) > vector_source -> throttle > self.connect((self.my_thro, 0), (self.my_h, 0)) > throttle -> head > self.connect((self.my_h, 0), (self.my_vec_snk, 0)) head -> > vector_sink > > time.sleep(10) > my_data=self.my_vec_snk.data() > print "data: ",my_data > -------------------------------------------------------------------------------------------------------------------------------------------------------- > if __name__ == '__main__': > parser = OptionParser(option_class=eng_option, usage="%prog: [options]") > (options, args) = parser.parse_args() > tb = top_block() > tb.Run(True) > ---------------------------------------------------------------------------------------------------------------------------------------------------------- > Output of the program : > > data: () > > I need to read an incoming data to correlate with some predefined data, > vector. If I am not wrong the best solution is to save data in a vector sink > same length as the predefined vector, then applying the cross-correlation to > them. The program above is just a test program to examine what the vector > sink > stores, but I am confused why it does not work, because I saw a similar > working use of a vector sink with USRPs. I already save the data in a file, > but it does not seem to me as a good solution at least due to possible > memory waste, though clearing the file is possible in run-time. > > Thanks in advance, > Abdullah > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
vector_sink is useful if you're running for a short time, for example in a test. You can access that data using snk.data() after tb.run() has completed. So something like: tb.run() time.sleep(10) my_data = tb.my_vec_snk.data() print "data: ",my_data To extract data from a running flow graph use the probe blocks (gr.probe_signal_*). tb.start() time.sleep(10) my_data = tb.my_probe_signal.level() print "data: ",my_data _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
