2 # Copyright 2005,2006 Free Software Foundation, Inc.
4 # This file is part of GNU Radio
6 # GNU Radio is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2, or (at your option)
11 # GNU Radio is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with GNU Radio; see the file COPYING. If not, write to
18 # the Free Software Foundation, Inc., 51 Franklin Street,
19 # Boston, MA 02110-1301, USA.
22 from gnuradio import gr, gru, blks
23 from gnuradio import usrp
24 from gnuradio import eng_notation
32 # /////////////////////////////////////////////////////////////////////////////
34 # /////////////////////////////////////////////////////////////////////////////
36 class transmit_path(gr.hier_block):
37 def __init__(self, fg, options):
39 See below for what options should hold
42 options = copy.copy(options) # make a copy so we can destructively modify
44 self._verbose = options.verbose
45 self._tx_amplitude = options.tx_amplitude # digital amplitude sent to USRP
47 self.ofdm_mod = ofdm.ofdm_mod(fg, options)
48 self.packet_transmitter = \
49 blks.mod_ofdm_pkts(fg,
55 self.amp = gr.multiply_const_cc(1)
56 self.set_tx_amplitude(self._tx_amplitude)
58 # Display some information about the setup
62 # Create and setup transmit path flow graph
63 fg.connect(self.packet_transmitter, self.amp)
64 gr.hier_block.__init__(self, fg, None, self.amp)
66 def set_tx_amplitude(self, ampl):
68 Sets the transmit amplitude sent to the USRP
69 @param: ampl 0 <= ampl < 32768. Try 8000
71 self._tx_amplitude = max(0.0, min(ampl, 32767.0))
72 self.amp.set_k(self._tx_amplitude)
74 def send_pkt(self, payload='', eof=False):
76 Calls the transmitter method to send a packet
78 return self.packet_transmitter.send_pkt(payload, eof)
83 def samples_per_symbol(self):
84 return self._samples_per_symbol
86 def add_options(normal, expert):
88 Adds transmitter-specific options to the Options Parser
90 normal.add_option("", "--tx-amplitude", type="eng_float", default=12000, metavar="AMPL",
91 help="set transmitter digital amplitude: 0 <= AMPL < 32768 [default=%default]")
92 normal.add_option("-v", "--verbose", action="store_true", default=False)
93 expert.add_option("", "--log", action="store_true", default=False,
94 help="Log all parts of flow graph to file (CAUTION: lots of data)")
96 # Make a static method to call before instantiation
97 add_options = staticmethod(add_options)
99 def _print_verbage(self):
101 Prints information about the transmit path
103 print "Tx amplitude %s" % (self._tx_amplitude)