3 # Copyright 2004,2005,2007,2008 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 # GNU Radio example program to record a dial tone to a WAV file
25 from gnuradio import gr
26 from gnuradio.eng_option import eng_option
27 from optparse import OptionParser
29 class my_top_block(gr.top_block):
32 gr.top_block.__init__(self)
34 usage = "%prog: [options] filename"
35 parser = OptionParser(option_class=eng_option, usage=usage)
36 parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
37 help="set sample rate to RATE (48000)")
38 parser.add_option("-N", "--samples", type="eng_float", default=None,
39 help="number of samples to record")
40 (options, args) = parser.parse_args ()
41 if len(args) != 1 or options.samples is None:
45 sample_rate = int(options.sample_rate)
48 src0 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, ampl)
49 src1 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, ampl)
50 head0 = gr.head(gr.sizeof_float, int(options.samples))
51 head1 = gr.head(gr.sizeof_float, int(options.samples))
52 dst = gr.wavfile_sink(args[0], 2, int(options.sample_rate), 16)
54 self.connect(src0, head0, (dst, 0))
55 self.connect(src1, head1, (dst, 1))
57 if __name__ == '__main__':
60 except KeyboardInterrupt: