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Diffstat (limited to 'gnuradio-examples/python/dect/usrp_source.py')
| -rw-r--r-- | gnuradio-examples/python/dect/usrp_source.py | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/gnuradio-examples/python/dect/usrp_source.py b/gnuradio-examples/python/dect/usrp_source.py deleted file mode 100644 index df19ff278..000000000 --- a/gnuradio-examples/python/dect/usrp_source.py +++ /dev/null @@ -1,124 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 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. -# - -from gnuradio import gr, usrp, eng_notation -n2s = eng_notation.num_to_str - -# Hierarchical block implementing a USRP source for complex floats, -# with convenience functions for gain, tune, decimation, etc. -# -class usrp_source_c(gr.hier_block2): - """ - Create a USRP source object supplying complex floats. - """ - def __init__(self, which=0, subdev_spec=None, gain=None, if_rate=None, - freq=0.0, calibration=0.0, verbose=False): - # Call hierarchical block constructor - gr.hier_block2.__init__(self, - "usrp_source_c", # Block typename - gr.io_signature(0,0,0), # Input signature - gr.io_signature(1,1,gr.sizeof_gr_complex)) # Output signature - - self._verbose = verbose - self._u = usrp.source_c(which) - if self._verbose: - print 'ADC sample rate is', n2s(self._u.adc_rate()), "sps" - self.set_subdev(subdev_spec) - self.set_if_rate(if_rate) - self.set_gain(gain) - self.set_calibration(calibration) - self.tune(freq) - self.connect(self._u, self) - - def set_subdev(self, subdev_spec): - if subdev_spec is None: - subdev_spec = self.pick_subdevice() - self._subdev = usrp.selected_subdev(self._u, subdev_spec) - self._u.set_mux(usrp.determine_rx_mux_value(self._u, subdev_spec)) - if self._verbose: - print 'RX using', self._subdev.name(), 'daughterboard' - - def pick_subdevice(self): - """ - The user didn't specify a subdevice. - If there's a daughterboard on A, select A. - If there's a daughterboard on B, select B. - Otherwise, select A. - """ - if self._u.db(0, 0).dbid() >= 0: # dbid is < 0 if there's no d'board or a problem - return (0, 0) - if self._u.db(1, 0).dbid() >= 0: - return (1, 0) - return (0, 0) - - def set_if_rate(self, if_rate): - # If no IF rate specified, set to maximum decimation - if if_rate is None: - self._decim = 256 - else: - self._decim = int(self._u.adc_rate()/if_rate) - - self._u.set_decim_rate(self._decim) - self._if_rate = self._u.adc_rate()/self._decim - - if self._verbose: - print "USRP decimation rate is", self._decim - print "USRP IF rate is", n2s(self._if_rate), "sps" - - def set_gain(self, gain): - # If no gain specified, set to midrange - if gain is None: - g = self._subdev.gain_range() - gain = (g[0]+g[1])/2.0 - self._gain = gain - self._subdev.set_gain(self._gain) - - def set_calibration(self, calibration): - self._cal = calibration - if self._verbose: - print "Using frequency calibration offset of", n2s(calibration), "Hz" - - def tune(self, freq): - """ - Set the center frequency we're interested in. - - @param target_freq: frequency in Hz - @type: 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 down converter. - """ - self._tune_result = usrp.tune(self._u, 0, self._subdev, freq+self._cal) - if self._tune_result: - if self._verbose: - print "Baseband frequency is", n2s(self._tune_result.baseband_freq), "Hz" - print "DXC frequency is", n2s(self._tune_result.dxc_freq), "Hz" - print "Center frequency is", n2s(freq), "Hz" - print "Residual frequency is", n2s(self._tune_result.residual_freq), "Hz" - return True - - return False - -if __name__ == '__main__': - src = usrp_source_c(verbose=True) |