1 files changed, 110 insertions, 0 deletions
diff --git a/gnuradio-examples/python/limbo/sounder/usrp_sounder_tx.py b/gnuradio-examples/python/limbo/sounder/usrp_sounder_tx.py
new file mode 100755
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+++ b/gnuradio-examples/python/limbo/sounder/usrp_sounder_tx.py
@@ -0,0 +1,110 @@
+#!/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, 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.top_block):
+    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.top_block.__init__(self, "usrp_sounder_tx")
+        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._chip_rate = self._u._if_rate
+        self._max_time = float(self._length)/self._chip_rate
+	self._pn = sounder_tx(self._degree, self._chip_rate, self._verbose)
+        self._gain = gr.multiply_const_ff(amplitude)
+        self._f2c = gr.float_to_complex()
+	self.connect(self._pn, self._gain, self._f2c, self._u)
+        
+        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
+
+                              
+def main():
+	parser = OptionParser(option_class=eng_option)
+
+	# Transmit path options
+        parser.add_option("-T", "--tx-subdev-spec", type="subdev", default=None,
+                          help="select USRP Rx side A or B (default=first found)")
+        parser.add_option("-f", "--freq", type="eng_float", default=0.0,
+                          help="set center frequency (default=%default)")
+        parser.add_option("-c", "--cal", type="eng_float", default=0.0,
+                          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", "--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=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 = usrp_sounder_tx(options.tx_subdev_spec, options.freq, options.cal,
+				    options.verbose, options.degree, options.chip_rate,
+				    options.amplitude)
+			      
+	try:    
+            # Run forever
+            top_block.run()
+	except KeyboardInterrupt:
+            # Ctrl-C exits
+            pass
+
+if __name__ == '__main__':
+    main ()