1 files changed, 97 insertions, 0 deletions
diff --git a/gr-digital/examples/ofdm/transmit_path.py b/gr-digital/examples/ofdm/transmit_path.py
new file mode 100644
index 000000000..c5a7fd53d
--- /dev/null
+++ b/gr-digital/examples/ofdm/transmit_path.py
@@ -0,0 +1,97 @@
+#
+# Copyright 2005,2006,2011 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.
+# 
+
+from gnuradio import gr, blks2
+from gnuradio import eng_notation
+from gnuradio import digital
+
+import copy
+import sys
+
+# /////////////////////////////////////////////////////////////////////////////
+#                              transmit path
+# /////////////////////////////////////////////////////////////////////////////
+
+class transmit_path(gr.hier_block2): 
+    def __init__(self, options):
+        '''
+        See below for what options should hold
+        '''
+
+	gr.hier_block2.__init__(self, "transmit_path",
+				gr.io_signature(0, 0, 0),
+				gr.io_signature(1, 1, gr.sizeof_gr_complex))
+
+        options = copy.copy(options)    # make a copy so we can destructively modify
+
+        self._verbose      = options.verbose      # turn verbose mode on/off
+        self._tx_amplitude = options.tx_amplitude # digital amp sent to radio
+
+        self.ofdm_tx = blks2.ofdm_mod(options,
+                                      msgq_limit=4,
+                                      pad_for_usrp=False)
+
+        self.amp = gr.multiply_const_cc(1)
+        self.set_tx_amplitude(self._tx_amplitude)
+
+        # Display some information about the setup
+        if self._verbose:
+            self._print_verbage()
+
+        # Create and setup transmit path flow graph
+        self.connect(self.ofdm_tx, self.amp, self)
+
+    def set_tx_amplitude(self, ampl):
+        """
+        Sets the transmit amplitude sent to the USRP
+        @param: ampl 0 <= ampl < 1.0.  Try 0.10
+        """
+        self._tx_amplitude = max(0.0, min(ampl, 1))
+        self.amp.set_k(self._tx_amplitude)
+        
+    def send_pkt(self, payload='', eof=False):
+        """
+        Calls the transmitter method to send a packet
+        """
+        return self.ofdm_tx.send_pkt(payload, eof)
+        
+    def add_options(normal, expert):
+        """
+        Adds transmitter-specific options to the Options Parser
+        """
+        normal.add_option("", "--tx-amplitude", type="eng_float",
+                          default=0.1, metavar="AMPL",
+                          help="set transmitter digital amplitude: 0 <= AMPL < 1.0 [default=%default]")
+        normal.add_option("-v", "--verbose", action="store_true",
+                          default=False)
+        expert.add_option("", "--log", action="store_true",
+                          default=False,
+                          help="Log all parts of flow graph to file (CAUTION: lots of data)")
+
+    # Make a static method to call before instantiation
+    add_options = staticmethod(add_options)
+
+    def _print_verbage(self):
+        """
+        Prints information about the transmit path
+        """
+        print "Tx amplitude     %s" % (self._tx_amplitude)
+