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Diffstat (limited to 'gr-uhd/examples/fm_tx_2_daughterboards.py')
| -rwxr-xr-x | gr-uhd/examples/fm_tx_2_daughterboards.py | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/gr-uhd/examples/fm_tx_2_daughterboards.py b/gr-uhd/examples/fm_tx_2_daughterboards.py new file mode 100755 index 000000000..36d237616 --- /dev/null +++ b/gr-uhd/examples/fm_tx_2_daughterboards.py @@ -0,0 +1,203 @@ +#!/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", "--address", type="string", + default="addr=192.168.10.2", + help="Address of UHD device, [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.address)) + uhd_type = d[0].get('type') + + self.u = uhd.usrp_sink(device_addr=options.address, + 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 |