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# Copyright 2008 Free Software Foundation, Inc.
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# This file is part of GNU Radio
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# GNU Radio is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# GNU Radio is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with GNU Radio; see the file COPYING. If not, write to
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# the Free Software Foundation, Inc., 51 Franklin Street,
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# Boston, MA 02110-1301, USA.
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from gnuradio import gr, gru
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from gnuradio import usrp
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from gnuradio.eng_option import eng_option
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from gnuradio import eng_notation
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from optparse import OptionParser
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from gnuradio import gpio
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class my_top_block(gr.top_block):
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gr.top_block.__init__(self)
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self.waveform_type = gr.GR_CONST_WAVE
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self.waveform_ampl = 16000
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self.waveform_freq = 100.12345e3
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self.waveform_offset = 0
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self._instantiate_blocks ()
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self.set_waveform_type (self.waveform_type)
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return self.u.dac_freq() / self.interp
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def usb_throughput (self):
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return self.usb_freq () * 4
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def set_waveform_type (self, type):
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valid waveform types are: gr.GR_SIN_WAVE, gr.GR_CONST_WAVE,
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gr.GR_UNIFORM and gr.GR_GAUSSIAN
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self._configure_graph (type)
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self.waveform_type = type
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def set_waveform_ampl (self, ampl):
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self.waveform_ampl = ampl
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self.siggen.set_amplitude (ampl)
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self.noisegen.set_amplitude (ampl)
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def set_waveform_freq (self, freq):
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self.waveform_freq = freq
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self.siggen.set_frequency (freq)
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def set_waveform_offset (self, offset):
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self.waveform_offset = offset
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self.siggen.set_offset (offset)
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def set_interpolator (self, interp):
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self.siggen.set_sampling_freq (self.usb_freq ())
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self.u.set_interp_rate (interp)
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def _instantiate_blocks (self):
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self.u = usrp.sink_c (0, self.interp,fpga_filename=gpio.fpga_filename)
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self.siggen = gr.sig_source_c (self.usb_freq (),
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self.noisegen = gr.noise_source_c (gr.GR_UNIFORM,
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self.vecgen = gr.vector_source_c ([complex(1.0,0.0),complex(0.0,0.0),complex(1.0,1.0),complex(0.0,1.0)],True)
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# self.file_sink = gr.file_sink (gr.sizeof_gr_complex, "siggen.dat")
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def _configure_graph (self, type):
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self.disconnect_all ()
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if type == gr.GR_SIN_WAVE:
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self.connect (self.siggen, self.u)
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# self.connect (self.siggen, self.file_sink)
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self.siggen.set_waveform (type)
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self.src = self.siggen
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elif type == gr.GR_UNIFORM or type == gr.GR_GAUSSIAN:
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self.connect (self.noisegen, self.u)
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self.noisegen.set_type (type)
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self.src = self.noisegen
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elif type == gr.GR_CONST_WAVE:
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self.connect (self.vecgen, self.u)
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self.src = self.vecgen
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raise ValueError, type
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def set_freq(self, target_freq):
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Set the center frequency we're interested in.
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@param target_freq: frequency in Hz
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Tuning is a two step process. First we ask the front-end to
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tune as close to the desired frequency as it can. Then we use
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the result of that operation and our target_frequency to
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determine the value for the digital up converter.
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r = self.u.tune(self.subdev._which, self.subdev, target_freq)
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#print "r.baseband_freq =", eng_notation.num_to_str(r.baseband_freq)
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#print "r.dxc_freq =", eng_notation.num_to_str(r.dxc_freq)
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#print "r.residual_freq =", eng_notation.num_to_str(r.residual_freq)
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#print "r.inverted =", r.inverted
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parser = OptionParser (option_class=eng_option)
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parser.add_option ("-T", "--tx-subdev-spec", type="subdev", default=(0, 0),
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help="select USRP Tx side A or B")
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parser.add_option ("-f", "--rf-freq", type="eng_float", default=None,
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help="set RF center frequency to FREQ")
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parser.add_option ("-i", "--interp", type="int", default=512,
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help="set fgpa interpolation rate to INTERP [default=%default]")
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parser.add_option ("--sine", dest="type", action="store_const", const=gr.GR_SIN_WAVE,
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help="generate a complex sinusoid [default]", default=gr.GR_SIN_WAVE)
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parser.add_option ("--gaussian", dest="type", action="store_const", const=gr.GR_GAUSSIAN,
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help="generate Gaussian random output")
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parser.add_option ("--uniform", dest="type", action="store_const", const=gr.GR_UNIFORM,
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help="generate Uniform random output")
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parser.add_option ("-w", "--waveform-freq", type="eng_float", default=100e3,
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help="set waveform frequency to FREQ [default=%default]")
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parser.add_option ("-a", "--amplitude", type="eng_float", default=16e3,
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help="set waveform amplitude to AMPLITUDE [default=%default]", metavar="AMPL")
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parser.add_option ("-g", "--gain", type="eng_float", default=None,
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help="set output gain to GAIN [default=%default]")
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parser.add_option ("-o", "--offset", type="eng_float", default=0,
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help="set waveform offset to OFFSET [default=%default]")
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parser.add_option ("--digital", dest="type", action="store_const", const=gr.GR_CONST_WAVE,
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help="generate (only) a digital wave on lsb (will be output on gpio pins with special usrp firmware)")
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(options, args) = parser.parse_args ()
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if options.rf_freq is None:
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sys.stderr.write("usrp_siggen: must specify RF center frequency with -f RF_FREQ\n")
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tb.set_interpolator (options.interp)
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tb.set_waveform_type (options.type)
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tb.set_waveform_freq (options.waveform_freq)
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tb.set_waveform_ampl (options.amplitude)
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tb.set_waveform_offset (options.offset)
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# determine the daughterboard subdevice we're using
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if options.tx_subdev_spec is None:
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options.tx_subdev_spec = usrp.pick_tx_subdevice(tb.u)
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m = usrp.determine_tx_mux_value(tb.u, options.tx_subdev_spec)
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#print "mux = %#04x" % (m,)
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tb.subdev = usrp.selected_subdev(tb.u, options.tx_subdev_spec)
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print "Using TX d'board %s" % (tb.subdev.side_and_name(),)
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if options.gain is None:
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tb.subdev.set_gain(tb.subdev.gain_range()[1]) # set max Tx gain
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tb.subdev.set_gain(options.gain) # set max Tx gain
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if not tb.set_freq(options.rf_freq):
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sys.stderr.write('Failed to set RF frequency\n')
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tb.subdev.set_enable(True) # enable transmitter
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except KeyboardInterrupt:
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if __name__ == '__main__':