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benchmark_tx.py
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benchmark_tx.py
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#!/usr/bin/env python
#
# Copyright 2010,2011,2013 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 oml4py import OMLBase
import sys, os
path = os.path.dirname(sys.argv[0]).split("share")[0] + "lib/python2.7/dist-packages"
sys.path.append(path)
os.environ['SHELL'] = "/bin/bash"
os.environ['LC_ALL'] = 'C'
os.environ['LANG'] = 'C'
os.environ['PYTHONPATH'] = os.path.dirname(sys.argv[0]).split("share")[0] +'lib/python2.7/dist-packages'
os.environ['PKG_CONFIG_PATH'] = os.path.dirname(sys.argv[0]).split("share")[0] +'lib/pkgconfig'
from gnuradio import gr
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import uhd
from gnuradio import analog
from gnuradio.eng_option import eng_option
from optparse import OptionParser
# From gr-digital
from gnuradio import digital
# from current dir
from transmit_path import transmit_path
from uhd_interface import uhd_transmitter
import time, struct
import socket
import random
#import os
#print os.getpid()
#raw_input('Attach and press enter')
class my_top_block(gr.top_block):
def __init__(self, modulator, options):
gr.top_block.__init__(self)
if(options.tx_freq is not None):
# Work-around to get the modulation's bits_per_symbol
args = modulator.extract_kwargs_from_options(options)
symbol_rate = options.bitrate / modulator(**args).bits_per_symbol()
self.sink = uhd_transmitter(options.args, symbol_rate,
options.samples_per_symbol, options.tx_freq,
options.lo_offset, options.tx_gain,
options.spec, options.antenna,
options.clock_source, options.verbose)
options.samples_per_symbol = self.sink._sps
elif(options.to_file is not None):
sys.stderr.write(("Saving samples to '%s'.\n\n" % (options.to_file)))
self.sink = blocks.file_sink(gr.sizeof_gr_complex, options.to_file)
else:
sys.stderr.write("No sink defined, dumping samples to null sink.\n\n")
self.sink = blocks.null_sink(gr.sizeof_gr_complex)
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
self.txpath = transmit_path(modulator, options)
alpha = 0.001
thresh = 20
self.probe = analog.probe_avg_mag_sqrd_c(thresh,alpha)
self.source = uhd.usrp_source(
",".join(("", "")),
uhd.stream_args(
cpu_format="fc32",
channels=range(1),
),
)
self.source.set_samp_rate(self.sink._rate)
self.source.set_center_freq(uhd.tune_request(options.tx_freq,0))
self.source.set_gain(options.tx_gain)
self.connect(self.source, self.probe)
self.connect(self.txpath, self.sink)
print >> sys.stderr, options
# /////////////////////////////////////////////////////////////////////////////
# main
# /////////////////////////////////////////////////////////////////////////////
def main():
random.seed(os.urandom(100))
def send_pkt(payload='', eof=False):
return tb.txpath.send_pkt(payload, eof)
mods = digital.modulation_utils.type_1_mods()
parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
expert_grp = parser.add_option_group("Expert")
parser.add_option("-m", "--modulation", type="choice", choices=mods.keys(),
default='gmsk',
help="Select modulation from: %s [default=%%default]"
% (', '.join(mods.keys()),))
parser.add_option("-s", "--size", type="eng_float", default=1500,
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 discontinous transmission (bursts of 5 packets)")
parser.add_option("","--from-file", default=None,
help="use intput file for packet contents")
parser.add_option("","--to-file", default=None,
help="Output file for modulated samples")
parser.add_option("-E", "--exp-id", type="string", default="test",
help="specify the experiment ID")
parser.add_option("-N", "--node-id", type="string", default="tx",
help="specify the experiment ID")
parser.add_option("","--server", action="store_true", default=False,
help="To take data from the server")
parser.add_option("", "--port", type="int", default=None,
help="specify the server port")
transmit_path.add_options(parser, expert_grp)
uhd_transmitter.add_options(parser)
for mod in mods.values():
mod.add_options(expert_grp)
(options, args) = parser.parse_args ()
omlDb = OMLBase("gnuradiorx",options.exp_id,options.node_id,"tcp:nitlab3.inf.uth.gr:3003")
omlDb.addmp("packets", "type:string value:long")
omlDb.start()
if len(args) != 0:
parser.print_help()
sys.exit(1)
if options.from_file is not None:
source_file = open(options.from_file, 'r')
# build the graph
tb = my_top_block(mods[options.modulation], 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)
# connect to server
if options.server:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# server_address = ('10.0.1.200', 51000)
server_address = ('10.0.1.200', options.port)
print >>sys.stderr, 'connecting to %s port %s' % server_address
sock.connect(server_address)
freq_list = [options.tx_freq, options.tx_freq+1000000.0, options.tx_freq-1000000.0]
payload_buffer = []
curr_freq = best_freq= options.tx_freq
while pktno<1000:
if options.server:
data = "";
while len(data) < pkt_size:
if (pktno<1000):
data += sock.recv(pkt_size - len(data))
if data == '':
# No more data received from server
sock.close()
break;
elif options.from_file is None:
data = (pkt_size - 2) * chr(pktno & 0xff)
else:
data = source_file.read(pkt_size - 2)
if data == '':
break;
if pktno%200==0:
time.sleep(0.7)
tb.source.set_center_freq(uhd.tune_request(curr_freq,0))
time.sleep(0.01)
if(tb.probe.level()>0.15): #find best freq
lowest=3
i=0
for i in range (len(freq_list)):
#if freq_list[i]!=curr_freq:
tb.source.set_center_freq(uhd.tune_request(freq_list[i],0))
time.sleep(0.01)
measurement = tb.probe.level()
if measurement<lowest:
lowest = measurement
best_freq = freq_list[i]
curr_freq = best_freq
tb.sink.set_freq(best_freq,0)
payload = struct.pack('!H', pktno & 0xffff) + data
send_pkt(payload)
payload_buffer.insert(pktno,payload)
n += len(payload)
sys.stderr.write('.')
omlDb.inject("packets", ("sent", pktno))
if options.discontinuous and pktno % 5 == 4:
time.sleep(1)
pktno += 1
i=0
while(1):
if i==40 :#problematic packets
for k in range(0,5):
send_pkt(payload_buffer[k*200+199])
send_pkt(payload_buffer[k*200])
if i%200==0:
time.sleep(0.7)
tb.source.set_center_freq(uhd.tune_request(curr_freq,0))
time.sleep(0.01)
if(tb.probe.level()>0.15): #find best freq
lowest=3
for j in range (len(freq_list)):
#if freq_list[j]!=curr_freq:
tb.source.set_center_freq(uhd.tune_request(freq_list[j],0))
time.sleep(0.01)
measurement = tb.probe.level()
if measurement<lowest:
lowest = measurement
best_freq = freq_list[j]
curr_freq = best_freq
tb.sink.set_freq(best_freq,0)
send_pkt(payload_buffer[i%1000])
i+=1
send_pkt(eof=True)
tb.wait() # wait for it to finish
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass