From f1c41f807cb29472d0924149e39d6ec8ad90e6a2 Mon Sep 17 00:00:00 2001
From: eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 27 Sep 2006 05:14:03 +0000
Subject: 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
---
gnuradio-examples/python/gmsk2/tunnel.py | 310 -------------------------------
1 file changed, 310 deletions(-)
delete mode 100755 gnuradio-examples/python/gmsk2/tunnel.py
(limited to 'gnuradio-examples/python/gmsk2/tunnel.py')
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
--
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