--- /dev/null
+#!/usr/bin/env python
+#
+# Copyright 2005, 2006 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 usrp
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+import time, struct, sys
+
+# from current dir
+from transmit_path import transmit_path
+from pick_bitrate import pick_tx_bitrate
+import fusb_options
+
+class my_top_block(gr.top_block):
+ def __init__(self, options):
+ gr.top_block.__init__(self)
+
+ self._tx_freq = options.tx_freq # tranmitter's center frequency
+ self._tx_subdev_spec = options.tx_subdev_spec # daughterboard to use
+ self._interp = options.interp # interpolating rate for the USRP (prelim)
+ self._fusb_block_size = options.fusb_block_size # usb info for USRP
+ self._fusb_nblocks = options.fusb_nblocks # usb info for USRP
+
+ if self._tx_freq is None:
+ sys.stderr.write("-f FREQ or --freq FREQ or --tx-freq FREQ must be specified\n")
+ raise SystemExit
+
+ # Set up USRP sink; also adjusts interp, and bitrate
+ self._setup_usrp_sink()
+
+ # copy the final answers back into options for use by modulator
+ #options.bitrate = self._bitrate
+
+ self.txpath = transmit_path(options)
+
+ self.connect(self.txpath, self.u)
+
+ def _setup_usrp_sink(self):
+ """
+ Creates a USRP sink, determines the settings for best bitrate,
+ and attaches to the transmitter's subdevice.
+ """
+ self.u = usrp.sink_c(fusb_block_size=self._fusb_block_size,
+ fusb_nblocks=self._fusb_nblocks)
+
+ self.u.set_interp_rate(self._interp)
+
+ # determine the daughterboard subdevice we're using
+ if self._tx_subdev_spec is None:
+ self._tx_subdev_spec = usrp.pick_tx_subdevice(self.u)
+ self.u.set_mux(usrp.determine_tx_mux_value(self.u, self._tx_subdev_spec))
+ self.subdev = usrp.selected_subdev(self.u, self._tx_subdev_spec)
+
+ # Set center frequency of USRP
+ ok = self.set_freq(self._tx_freq)
+ if not ok:
+ print "Failed to set Tx frequency to %s" % (eng_notation.num_to_str(self._tx_freq),)
+ raise ValueError
+
+ # Set the USRP for maximum transmit gain
+ # (Note that on the RFX cards this is a nop.)
+ self.set_gain(self.subdev.gain_range()[1])
+
+ # enable Auto Transmit/Receive switching
+ self.set_auto_tr(True)
+
+ def set_freq(self, target_freq):
+ """
+ Set the center frequency we're interested in.
+
+ @param target_freq: frequency in Hz
+ @rypte: 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 up converter.
+ """
+ r = self.u.tune(self.subdev.which(), self.subdev, target_freq)
+ if r:
+ return True
+
+ return False
+
+ def set_gain(self, gain):
+ """
+ Sets the analog gain in the USRP
+ """
+ self.gain = gain
+ self.subdev.set_gain(gain)
+
+ def set_auto_tr(self, enable):
+ """
+ Turns on auto transmit/receive of USRP daughterboard (if exits; else ignored)
+ """
+ return self.subdev.set_auto_tr(enable)
+
+ def interp(self):
+ return self._interp
+
+ def add_options(normal, expert):
+ """
+ Adds usrp-specific options to the Options Parser
+ """
+ add_freq_option(normal)
+ normal.add_option("-T", "--tx-subdev-spec", type="subdev", default=None,
+ help="select USRP Tx side A or B")
+ normal.add_option("-v", "--verbose", action="store_true", default=False)
+
+ expert.add_option("", "--tx-freq", type="eng_float", default=None,
+ help="set transmit frequency to FREQ [default=%default]", metavar="FREQ")
+ expert.add_option("-i", "--interp", type="intx", default=256,
+ help="set fpga interpolation rate to INTERP [default=%default]")
+ # Make a static method to call before instantiation
+ add_options = staticmethod(add_options)
+
+ def _print_verbage(self):
+ """
+ Prints information about the transmit path
+ """
+ print "Using TX d'board %s" % (self.subdev.side_and_name(),)
+ print "modulation: %s" % (self._modulator_class.__name__)
+ print "interp: %3d" % (self._interp)
+ print "Tx Frequency: %s" % (eng_notation.num_to_str(self._tx_freq))
+
+
+def add_freq_option(parser):
+ """
+ Hackery that has the -f / --freq option set both tx_freq and rx_freq
+ """
+ def freq_callback(option, opt_str, value, parser):
+ parser.values.rx_freq = value
+ parser.values.tx_freq = value
+
+ if not parser.has_option('--freq'):
+ parser.add_option('-f', '--freq', type="eng_float",
+ action="callback", callback=freq_callback,
+ help="set Tx and/or Rx frequency to FREQ [default=%default]",
+ metavar="FREQ")
+
+# /////////////////////////////////////////////////////////////////////////////
+# main
+# /////////////////////////////////////////////////////////////////////////////
+
+def main():
+
+ def send_pkt(payload='', eof=False):
+ return tb.txpath.send_pkt(payload, eof)
+
+ parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
+ expert_grp = parser.add_option_group("Expert")
+ parser.add_option("-s", "--size", type="eng_float", default=400,
+ help="set packet size [default=%default]")
+ parser.add_option("-M", "--megabytes", type="eng_float", default=1.0,
+ help="set megabytes to transmit [default=%default]")
+ parser.add_option("","--discontinuous", action="store_true", default=False,
+ help="enable discontinuous mode")
+
+ my_top_block.add_options(parser, expert_grp)
+ transmit_path.add_options(parser, expert_grp)
+ blks2.ofdm_mod.add_options(parser, expert_grp)
+ blks2.ofdm_demod.add_options(parser, expert_grp)
+ fusb_options.add_options(expert_grp)
+
+ (options, args) = parser.parse_args ()
+
+ # build the graph
+ tb = my_top_block(options)
+
+ r = gr.enable_realtime_scheduling()
+ if r != gr.RT_OK:
+ print "Warning: failed to enable realtime scheduling"
+
+ tb.start() # start flow graph
+
+ # generate and send packets
+ nbytes = int(1e6 * options.megabytes)
+ n = 0
+ pktno = 0
+ pkt_size = int(options.size)
+
+ while n < nbytes:
+ send_pkt(struct.pack('!H', pktno) + (pkt_size - 2) * chr(pktno & 0xff))
+ n += pkt_size
+ sys.stderr.write('.')
+ if options.discontinuous and pktno % 5 == 1:
+ time.sleep(1)
+ pktno += 1
+
+ send_pkt(eof=True)
+ tb.wait() # wait for it to finish
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass
projects / debian / gnuradio / blobdiff