diff options
| author | eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-09-27 05:14:03 +0000 |
|---|---|---|
| committer | eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-09-27 05:14:03 +0000 |
| commit | f1c41f807cb29472d0924149e39d6ec8ad90e6a2 (patch) | |
| tree | 47e42f8cdfc83aaa3b706e06862c3efa4ba16745 /gnuradio-examples/python/gmsk2/tunnel.py | |
| parent | 04bb51ec4f1539c51c861b7fcad2ca8047a872a3 (diff) | |
Merged changes from eb/digital-wip into trunk.
This includes:
* renaming gnuradio-examples/python/gmsk2 to gnuradio-examples/python/digital
* refactoring the digital data tx and rx test code into benchmark_tx
and benchmark_rx. These accept a -m <modulation> argument.
<modulation> can currently be selected from gmsk, dbpsk, dqpsk
* Two new AGC blocks: gr_agc2: separate attack and delay rates;
gr_feedforward_agc: FIR-ish compressor. Normalizes to peak envelope.
* Working DBPSK mod/demod (works fine)
* Working DQPSK mod/demod (works, but still needs more work)
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3662 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-examples/python/gmsk2/tunnel.py')
| -rwxr-xr-x | gnuradio-examples/python/gmsk2/tunnel.py | 310 |
1 files changed, 0 insertions, 310 deletions
diff --git a/gnuradio-examples/python/gmsk2/tunnel.py b/gnuradio-examples/python/gmsk2/tunnel.py deleted file mode 100755 index faf16a6349..0000000000 --- a/gnuradio-examples/python/gmsk2/tunnel.py +++ /dev/null @@ -1,310 +0,0 @@ -#!/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 2, 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. -# - - -# ///////////////////////////////////////////////////////////////////////////// -# -# This code sets up up a virtual ethernet interface (typically gr0), -# and relays packets between the interface and the GNU Radio PHY+MAC -# -# What this means in plain language, is that if you've got a couple -# of USRPs on different machines, and if you run this code on those -# machines, you can talk between them using normal TCP/IP networking. -# -# ///////////////////////////////////////////////////////////////////////////// - - -from gnuradio import gr, gru, blks -from gnuradio import usrp -from gnuradio import eng_notation -from gnuradio.eng_option import eng_option -from optparse import OptionParser - -import random -import time -import struct -import sys -import os - -# from current dir -from transmit_path import transmit_path -from receive_path import receive_path -import fusb_options - -#print os.getpid() -#raw_input('Attach and press enter') - - -# ///////////////////////////////////////////////////////////////////////////// -# -# Use the Universal TUN/TAP device driver to move packets to/from kernel -# -# See /usr/src/linux/Documentation/networking/tuntap.txt -# -# ///////////////////////////////////////////////////////////////////////////// - -# Linux specific... -# TUNSETIFF ifr flags from <linux/tun_if.h> - -IFF_TUN = 0x0001 # tunnel IP packets -IFF_TAP = 0x0002 # tunnel ethernet frames -IFF_NO_PI = 0x1000 # don't pass extra packet info -IFF_ONE_QUEUE = 0x2000 # beats me ;) - -def open_tun_interface(tun_device_filename): - from fcntl import ioctl - - mode = IFF_TAP | IFF_NO_PI - TUNSETIFF = 0x400454ca - - tun = os.open(tun_device_filename, os.O_RDWR) - ifs = ioctl(tun, TUNSETIFF, struct.pack("16sH", "gr%d", mode)) - ifname = ifs[:16].strip("\x00") - return (tun, ifname) - - -# ///////////////////////////////////////////////////////////////////////////// -# the flow graph -# ///////////////////////////////////////////////////////////////////////////// - -class my_graph(gr.flow_graph): - - def __init__(self, mod_class, demod_class, - tx_subdev_spec, rx_subdev_spec, - rx_callback, - options, kwargs): - - gr.flow_graph.__init__(self) - self.txpath = transmit_path(self, mod_class, tx_subdev_spec, - options.bitrate, options.interp, options.spb, - options.tx_gain, options, kwargs) - self.rxpath = receive_path(self, demod_class, rx_subdev_spec, - options.bitrate, options.decim, options.spb, - rx_callback, options, {}) - - def send_pkt(self, payload='', eof=False): - return self.txpath.send_pkt(payload, eof) - - def carrier_sensed(self): - """ - Return True if the receive path thinks there's carrier - """ - return self.rxpath.carrier_sensed() - - -# ///////////////////////////////////////////////////////////////////////////// -# Carrier Sense MAC -# ///////////////////////////////////////////////////////////////////////////// - -class cs_mac(object): - """ - Prototype carrier sense MAC - - Reads packets from the TUN/TAP interface, and sends them to the PHY. - Receives packets from the PHY via phy_rx_callback, and sends them - into the TUN/TAP interface. - - Of course, we're not restricted to getting packets via TUN/TAP, this - is just an example. - """ - def __init__(self, tun_fd, verbose=False): - self.tun_fd = tun_fd # file descriptor for TUN/TAP interface - self.verbose = verbose - self.fg = None # flow graph (access to PHY) - - def set_flow_graph(self, fg): - self.fg = fg - - def phy_rx_callback(self, ok, payload): - """ - Invoked by thread associated with PHY to pass received packet up. - - @param ok: bool indicating whether payload CRC was OK - @param payload: contents of the packet (string) - """ - if self.verbose: - print "Rx: ok = %r len(payload) = %4d" % (ok, len(payload)) - if ok: - os.write(self.tun_fd, payload) - - def main_loop(self): - """ - Main loop for MAC. - Only returns if we get an error reading from TUN. - - FIXME: may want to check for EINTR and EAGAIN and reissue read - """ - min_delay = 0.001 # seconds - - while 1: - payload = os.read(self.tun_fd, 10*1024) - if not payload: - self.fg.send_pkt(eof=True) - break - - if self.verbose: - print "Tx: len(payload) = %4d" % (len(payload),) - - delay = min_delay - while self.fg.carrier_sensed(): - sys.stderr.write('B') - time.sleep(delay) - if delay < 0.050: - delay = delay * 2 # exponential back-off - - self.fg.send_pkt(payload) - - -# ///////////////////////////////////////////////////////////////////////////// -# main -# ///////////////////////////////////////////////////////////////////////////// - -def main(): - - parser = OptionParser (option_class=eng_option) - parser.add_option("-f", "--freq", type="eng_float", default=423.1e6, - help="set Tx and Rx frequency to FREQ [default=%default]", - metavar="FREQ") - parser.add_option("-r", "--bitrate", type="eng_float", default=None, - help="specify bitrate. spb and interp will be derived.") - parser.add_option("-g", "--rx-gain", type="eng_float", default=27, - help="set rx gain") - parser.add_option("-p", "--tx-gain", type="eng_float", default=100, - help="set tx gain") - parser.add_option("-T", "--tx-subdev-spec", type="subdev", default=None, - help="select USRP Tx side A or B") - parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, - help="select USRP Rx side A or B") - parser.add_option("-S", "--spb", type="int", default=None, - help="set samples/baud [default=%default]") - parser.add_option("-d", "--decim", type="intx", default=None, - help="set fpga decim rate to DECIM [default=%default]") - parser.add_option("-i", "--interp", type="intx", default=None, - help="set fpga interpolation rate to INTERP [default=%default]") - parser.add_option("-c", "--carrier-threshold", type="eng_float", default=30, - help="set carrier detect threshold (dB) [default=%default]") - parser.add_option("", "--bt", type="float", default=0.3, - help="set bandwidth-time product [default=%default]") - parser.add_option("","--tun-device-filename", default="/dev/net/tun", - help="path to tun device file [default=%default]") - parser.add_option("-v","--verbose", action="store_true", default=False) - fusb_options.add_options(parser) - (options, args) = parser.parse_args () - - if len(args) != 0: - parser.print_help() - sys.exit(1) - - if options.freq < 1e6: - options.freq *= 1e6 - - mod_kwargs = { - 'bt' : options.bt, - } - - # open the TUN/TAP interface - (tun_fd, tun_ifname) = open_tun_interface(options.tun_device_filename) - - # 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" - - - # If the user hasn't set the fusb_* parameters on the command line, - # pick some values that will reduce latency. - - if options.fusb_block_size == 0 and options.fusb_nblocks == 0: - if realtime: # be more aggressive - options.fusb_block_size = gr.prefs().get_long('fusb', 'rt_block_size', 1024) - options.fusb_nblocks = gr.prefs().get_long('fusb', 'rt_nblocks', 16) - else: - options.fusb_block_size = gr.prefs().get_long('fusb', 'block_size', 4096) - options.fusb_nblocks = gr.prefs().get_long('fusb', 'nblocks', 16) - - print "fusb_block_size =", options.fusb_block_size - print "fusb_nblocks =", options.fusb_nblocks - - # instantiate the MAC - mac = cs_mac(tun_fd, verbose=True) - - - # build the graph (PHY) - fg = my_graph(blks.gmsk2_mod, blks.gmsk2_demod, - options.tx_subdev_spec, options.rx_subdev_spec, - mac.phy_rx_callback, - options, mod_kwargs) - - mac.set_flow_graph(fg) # give the MAC a handle for the PHY - - if fg.txpath.bitrate() != fg.rxpath.bitrate(): - print "WARNING: Transmit bitrate = %sb/sec, Receive bitrate = %sb/sec" % ( - eng_notation.num_to_str(fg.txpath.bitrate()), - eng_notation.num_to_str(fg.rxpath.bitrate())) - - print "bitrate: %sb/sec" % (eng_notation.num_to_str(fg.txpath.bitrate()),) - print "spb: %3d" % (fg.txpath.spb(),) - print "interp: %3d" % (fg.txpath.interp(),) - - ok = fg.txpath.set_freq(options.freq) - if not ok: - print "Failed to set Tx frequency to %s" % (eng_notation.num_to_str(options.freq),) - raise SystemExit - - ok = fg.rxpath.set_freq(options.freq) - if not ok: - print "Failed to set Rx frequency to %s" % (eng_notation.num_to_str(options.freq),) - raise SystemExit - - print "Tx gain: ", options.tx_gain - fg.rxpath.set_gain(options.rx_gain) - print "Rx gain_range: ", fg.rxpath.subdev.gain_range(), " using", fg.rxpath.gain - - fg.rxpath.set_carrier_threshold(options.carrier_threshold) - print "Carrier sense threshold:", options.carrier_threshold, "dB" - - print - print "Allocated virtual ethernet interface: %s" % (tun_ifname,) - print "You must now use ifconfig to set its IP address. E.g.," - print - print " $ sudo ifconfig %s 10.10.10.1" % (tun_ifname,) - print - print "Be sure to use a different address in the same subnet for each machine." - print - - - fg.start() # Start executing the flow graph (runs in separate threads) - - mac.main_loop() # don't expect this to return... - - fg.stop() # but if it does, tell flow graph to stop. - fg.wait() # wait for it to finish - - -if __name__ == '__main__': - try: - main() - except KeyboardInterrupt: - pass |