diff options
Diffstat (limited to 'gnuradio-examples/python/hier/sounder/usrp_sounder_tx.py')
| -rwxr-xr-x | gnuradio-examples/python/hier/sounder/usrp_sounder_tx.py | 66 |
1 files changed, 60 insertions, 6 deletions
diff --git a/gnuradio-examples/python/hier/sounder/usrp_sounder_tx.py b/gnuradio-examples/python/hier/sounder/usrp_sounder_tx.py index c96313c67..00146146c 100755 --- a/gnuradio-examples/python/hier/sounder/usrp_sounder_tx.py +++ b/gnuradio-examples/python/hier/sounder/usrp_sounder_tx.py @@ -23,8 +23,49 @@ from gnuradio import gr, eng_notation from gnuradio.eng_option import eng_option from optparse import OptionParser +from usrp_sink import usrp_sink_c from sounder_tx import sounder_tx +n2s = eng_notation.num_to_str + +class usrp_sounder_tx(gr.hier_block2): + def __init__(self, subdev_spec, freq, cal, verbose, degree, chip_rate, amplitude): + + # Call hierarchical block constructor + # Top-level blocks have no inputs or outputs + gr.hier_block2.__init__(self, + "usrp_sounder_tx", # Block typename + gr.io_signature(0,0,0), # Input signature + gr.io_signature(0,0,0)) # Output signature + + self._freq = freq + self._cal = cal + self._verbose = verbose + self._degree = degree + self._length = 2**degree-1 + self._amplitude = amplitude + + self._u = usrp_sink_c(0, subdev_spec, chip_rate, self._freq, self._cal, self._verbose) + self.define_component("usrp", self._u) + self._chip_rate = self._u._if_rate + self._max_time = float(self._length)/self._chip_rate + self.define_component("pn", sounder_tx(self._degree, self._chip_rate, self._verbose)) + self.define_component("gain", gr.multiply_const_ff(amplitude)); + self.define_component("f2c", gr.float_to_complex()) + + if self._verbose: + print "Chip rate is", n2s(self._chip_rate), "chips/sec" + print "Resolution is", n2s(1.0/self._chip_rate), "sec" + print "Using PN code of degree", self._degree, "length", 2**self._degree-1 + print "Maximum measurable impulse response is", n2s(self._max_time), "sec" + print "Output amplitude is", amplitude + + # Ultimately this will be + # self.connect("pn gain f2c usrp") + self.connect("pn", 0, "gain", 0) + self.connect("gain", 0, "f2c", 0) + self.connect("f2c", 0, "usrp", 0) + def main(): parser = OptionParser(option_class=eng_option) @@ -37,22 +78,35 @@ def main(): help="set frequency calibration offset (default=%default)") parser.add_option("-v", "--verbose", action="store_true", default=False, help="print extra debugging info") - parser.add_option("-d", "--max-delay", type="eng_float", default=10e-6, - help="set maximum delay spread (default=%default)") + parser.add_option("-d", "--degree", type="int", default=10, + help="set PN code degree (length=2**degree-1, default=%default)") parser.add_option("-r", "--chip-rate", type="eng_float", default=8e6, help="set sounder chip rate (default=%default)") - parser.add_option("-g", "--amplitude", type="eng_float", default=32000.0, + parser.add_option("-g", "--amplitude", type="eng_float", default=8000.0, help="set output amplitude (default=%default)") + parser.add_option("", "--real-time", action="store_true", default=False, + help="Attempt to enable real-time scheduling") (options, args) = parser.parse_args() if len(args) != 0: parser.print_help() sys.exit(1) + if not options.real_time: + realtime = False + else: + # Attempt to enable realtime scheduling + r = gr.enable_realtime_scheduling() + if r == gr.RT_OK: + realtime = True + else: + realtime = False + print "Note: failed to enable realtime scheduling" + # Create an instance of a hierarchical block - top_block = sounder_tx(options.tx_subdev_spec, options.freq, options.cal, - options.verbose, options.max_delay, options.chip_rate, - options.amplitude) + top_block = usrp_sounder_tx(options.tx_subdev_spec, options.freq, options.cal, + options.verbose, options.degree, options.chip_rate, + options.amplitude) # Create an instance of a runtime, passing it the top block # to process |