def main():
gr.enable_realtime_scheduling()
tb = gr.top_block ()
src = gr.file_source(gr.sizeof_gr_complex, "transmit-data.dat", True)
parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
(options, args) = parser.parse_args ()
d = {'verbose': True, 'discontinuous': False, 'samples_per_symbol': 2, 'usrpx': None, 'interp': INTERP, 'fusb_block_size': 0, 'megabytes': 1.0, 'rx_freq': 2.475e9, 'size': 1500, 'show_tx_gain_range': False, 'log': False, 'tx_subdev_spec': None, 'fusb_nblocks': 0, 'lo_offset': None, 'tx_gain': TXGAIN, 'which': 0, 'modulation': 'gmsk', 'excess_bw': 0.34999999999999998, 'bt': 0.34999999999999998, 'interface': 'eth0', 'freq': None, 'bitrate': 100000.0, 'from_file': None, 'tx_freq': 2475000000.0, 'mac_addr': '', 'tx_amplitude': 0.1, 'gray_code': True}
for i, j in d.items():
setattr(options, i, j)
u = usrp_options.create_usrp_sink(options)
dac_rate = u.dac_rate()
if options.verbose:
print 'USRP Sink:', u
(_bitrate, _samples_per_symbol, _interp) = \
pick_tx_bitrate(options.bitrate, 2, \
options.samples_per_symbol, options.interp, dac_rate, \
u.get_interp_rates())
u.set_interp(_interp)
u.set_auto_tr(True)
if not u.set_center_freq(options.tx_freq):
print "Failed to set Rx frequency to %s" % (eng_notation.num_to_str(options.tx_freq))
raise ValueError, eng_notation.num_to_str(options.tx_freq)
m = gr.multiply_const_cc(CONSTANT)
tb.connect(src, m, u)
tb.run()
def _setup_sink(self, options):
self.sink = usrp_options.create_usrp_sink(options)
dac_rate = self.sink.dac_rate()
if options.verbose:
print 'USRP Sink:', self.sink
self._interp = options.interp
self.sink.set_interp(self._interp)
self._sample_rate = options.sample_rate
self.sink.set_samp_rate(self._sample_rate)
self.sink.set_auto_tr(True)
self._bandwidth = options.bandwidth
self.sink.set_bandwidth(self._bandwidth)
if not self.sink.set_center_freq(options.tx_freq):
print "Failed to set Tx frequency to %s" % (eng_notation.num_to_str(options.tx_freq))
raise ValueError, eng_notation.num_to_str(options.tx_freq)
def _setup_usrp_sink(self, options):
"""
Creates a USRP sink, determines the settings for best bitrate,
and attaches to the transmitter's subdevice.
"""
self.u = usrp_options.create_usrp_sink(options)
dac_rate = self.u.dac_rate()
if options.verbose:
print 'USRP Sink:', self.u
(self._bitrate, self._samples_per_symbol, self._interp) = \
pick_tx_bitrate(options.bitrate, self._modulator_class.bits_per_symbol(), \
options.samples_per_symbol, options.interp, dac_rate, \
self.u.get_interp_rates())
self.u.set_interp(self._interp)
self.u.set_auto_tr(True)
if not self.u.set_center_freq(options.tx_freq):
print "Failed to set Rx frequency to %s" % (eng_notation.num_to_str(options.tx_freq))
raise ValueError, eng_notation.num_to_str(options.tx_freq)
