#!/usr/bin/env python # # Copyright 2005-2007,2011 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, uhd, blks2 from gnuradio.eng_notation import num_to_str, str_to_num from gnuradio.eng_option import eng_option from optparse import OptionParser 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] tx-freq0 tx-freq1" parser = OptionParser (option_class=eng_option, usage=usage) parser.add_option("-a", "--args", type="string", default="", help="UHD device address args [default=%default]") parser.add_option("-A", "--antenna", type="string", default=None, help="select Rx Antenna where appropriate") parser.add_option("-s", "--samp-rate", type="eng_float", default=320e3, help="set sample rate [default=%default]") parser.add_option("-g", "--gain", type="eng_float", default=None, help="set gain in dB (default is midpoint)") (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 d = uhd.device_find(uhd.device_addr(options.args)) uhd_type = d[0].get('type') self.u = uhd.usrp_sink(device_addr=options.args, io_type=uhd.io_type.COMPLEX_FLOAT32, num_channels=2) # Set up USRP system based on type if(uhd_type == "usrp"): self.u.set_subdev_spec("A:0 B:0") tr0 = uhd.tune_request(freq0) tr1 = uhd.tune_request(freq1) else: if abs(freq0 - freq1) > 5.5e6: sys.stderr.write("\nError: When not using two separate d'boards, frequencies must bewithin 5.5MHz of each other.\n") raise SystemExit self.u.set_subdev_spec("A:0 A:0") mid_freq = (freq0 + freq1)/2.0 tr0 = uhd.tune_request(freq0, rf_freq=mid_freq, rf_freq_policy=uhd.tune_request.POLICY_MANUAL) tr1 = uhd.tune_request(freq1, rf_freq=mid_freq, rf_freq_policy=uhd.tune_request.POLICY_MANUAL) # Use the tune requests to tune each channel self.set_freq(tr0, 0) self.set_freq(tr1, 1) self.usrp_rate = options.samp_rate self.u.set_samp_rate(self.usrp_rate) dev_rate = self.u.get_samp_rate() # ---------------------------------------------------------------- # 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)) # Correct for any difference in requested and actual rates rrate = self.usrp_rate / dev_rate resamp = blks2.pfb_arb_resampler_ccf(rrate) # and wire them up self.connect(intl, resamp, self.u) if options.gain is None: # if no gain was specified, use the mid-point in dB g = self.u.get_gain_range() options.gain = float(g.start()+g.stop())/2.0 self.set_gain(options.gain, 0) self.set_gain(options.gain, 1) def set_freq(self, target_freq, chan): """ Set the center frequency we're interested in. @param side: 0 = side A, 1 = side B @param target_freq: frequency in Hz @rtype: bool """ print "Tuning channel %s to %sHz" % \ (chan, num_to_str(target_freq)) r = self.u.set_center_freq(target_freq, chan) if r: return True else: print " Set Frequency Failed!" return False def set_gain(self, gain, chan): self.u.set_gain(gain, chan) if __name__ == '__main__': try: my_top_block().run() except KeyboardInterrupt: pass