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#!/usr/bin/env python
#
# Copyright 2005,2006,2007 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.
#
"""
Transmit 2 signals, one out each daughterboard.
Outputs SSB (USB) signals on side A and side B at frequencies
specified on command line.
Side A is 600 Hz tone.
Side B is 350 + 440 Hz tones.
"""
from gnuradio import gr
from gnuradio.eng_notation import num_to_str, str_to_num
from gnuradio import usrp
from gnuradio import audio
from gnuradio import blks2
from gnuradio.eng_option import eng_option
from optparse import OptionParser
from usrpm import usrp_dbid
import math
import sys
class example_signal_0(gr.hier_block2):
"""
Sinusoid at 600 Hz.
"""
def __init__(self, sample_rate):
gr.hier_block2.__init__(self, "example_signal_0",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
src = gr.sig_source_c (sample_rate, # sample rate
gr.GR_SIN_WAVE, # waveform type
600, # frequency
1.0, # amplitude
0) # DC Offset
self.connect(src, self)
class example_signal_1(gr.hier_block2):
"""
North American dial tone (350 + 440 Hz).
"""
def __init__(self, sample_rate):
gr.hier_block2.__init__(self, "example_signal_1",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
src0 = gr.sig_source_c (sample_rate, # sample rate
gr.GR_SIN_WAVE, # waveform type
350, # frequency
1.0, # amplitude
0) # DC Offset
src1 = gr.sig_source_c (sample_rate, # sample rate
gr.GR_SIN_WAVE, # waveform type
440, # frequency
1.0, # amplitude
0) # DC Offset
sum = gr.add_cc()
self.connect(src0, (sum, 0))
self.connect(src1, (sum, 1))
self.connect(sum, self)
class my_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
usage="%prog: [options] side-A-tx-freq side-B-tx-freq"
parser = OptionParser (option_class=eng_option, usage=usage)
(options, args) = parser.parse_args ()
if len(args) != 2:
parser.print_help()
raise SystemExit
else:
freq0 = str_to_num(args[0])
freq1 = str_to_num(args[1])
# ----------------------------------------------------------------
# Set up USRP to transmit on both daughterboards
self.u = usrp.sink_c(nchan=2) # say we want two channels
self.dac_rate = self.u.dac_rate() # 128 MS/s
self.usrp_interp = 400
self.u.set_interp_rate(self.usrp_interp)
self.usrp_rate = self.dac_rate / self.usrp_interp # 320 kS/s
# we're using both daughterboard slots, thus subdev is a 2-tuple
self.subdev = (self.u.db(0, 0), self.u.db(1, 0))
print "Using TX d'board %s" % (self.subdev[0].side_and_name(),)
print "Using TX d'board %s" % (self.subdev[1].side_and_name(),)
# set up the Tx mux so that
# channel 0 goes to Slot A I&Q and channel 1 to Slot B I&Q
self.u.set_mux(0xba98)
self.subdev[0].set_gain(self.subdev[0].gain_range()[1]) # set max Tx gain
self.subdev[1].set_gain(self.subdev[1].gain_range()[1]) # set max Tx gain
self.set_freq(0, freq0)
self.set_freq(1, freq1)
self.subdev[0].set_enable(True) # enable transmitter
self.subdev[1].set_enable(True) # enable transmitter
# ----------------------------------------------------------------
# build two signal sources, interleave them, amplify and connect them to usrp
sig0 = example_signal_0(self.usrp_rate)
sig1 = example_signal_1(self.usrp_rate)
intl = gr.interleave(gr.sizeof_gr_complex)
self.connect(sig0, (intl, 0))
self.connect(sig1, (intl, 1))
# apply some gain
if_gain = 10000
ifamp = gr.multiply_const_cc(if_gain)
# and wire them up
self.connect(intl, ifamp, self.u)
def set_freq(self, side, target_freq):
"""
Set the center frequency we're interested in.
@param side: 0 = side A, 1 = side B
@param target_freq: frequency in Hz
@rtype: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital up converter.
"""
print "Tuning side %s to %sHz" % (("A", "B")[side], num_to_str(target_freq))
r = self.u.tune(self.subdev[side].which(), self.subdev[side], target_freq)
if r:
print " r.baseband_freq =", num_to_str(r.baseband_freq)
print " r.dxc_freq =", num_to_str(r.dxc_freq)
print " r.residual_freq =", num_to_str(r.residual_freq)
print " r.inverted =", r.inverted
print " OK"
return True
else:
print " Failed!"
return False
if __name__ == '__main__':
try:
my_top_block().run()
except KeyboardInterrupt:
pass
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