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#!/usr/bin/env python
#
# Copyright 2004,2005,2007,2008,2012 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
from gnuradio import gr, gru
from gnuradio import audio
from gnuradio.eng_arg import eng_float
from argparse import ArgumentParser
import os
try:
from gnuradio import analog
except ImportError:
sys.stderr.write("Error: Program requires gr-analog.\n")
sys.exit(1)
class my_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
parser = ArgumentParser()
parser.add_argument("-O", "--audio-output", default="",
help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
parser.add_argument("-r", "--sample-rate", type=eng_float, default=48000,
help="set sample rate to RATE (%(default)r)")
args = parser.parse_args()
sample_rate = int(args.sample_rate)
ampl = 0.1
src0 = analog.sig_source_f(sample_rate, analog.GR_SIN_WAVE, 350, ampl)
src1 = analog.sig_source_f(sample_rate, analog.GR_SIN_WAVE, 440, ampl)
dst = audio.sink(sample_rate, args.audio_output)
self.connect(src0, (dst, 0))
self.connect(src1, (dst, 1))
if __name__ == '__main__':
pid = gru.daemonize()
print "To stop this program, enter 'kill %d'" % pid
my_top_block().run()
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