#
# Copyright 2008 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, eng_notation, uhd
from gnuradio.eng_option import eng_option
from optparse import OptionParser
from transmit_path import transmit_path
import sys
_dac_rate = 128e6
n2s = eng_notation.num_to_str
class tx_bpsk_block(gr.top_block):
def __init__(self, options):
gr.top_block.__init__(self, "tx_mpsk")
self._transmitter = transmit_path(options.sps,
options.excess_bw,
options.amplitude)
if_rate = options.rate*options.sps
interp = int(_dac_rate/if_rate)
print "Modulation:", n2s(options.rate), "bits/sec"
print "TX IF rate:", n2s(if_rate), "samples/sec"
print "USRP interpolation:", interp
print "DAC amplitude:", options.amplitude
self._setup_usrp(options.ip,
interp,
options.gain,
options.tx_freq)
self.connect(self._transmitter, self._usrp)
def _setup_usrp(self,ip,interp, gain, tx_freq):
self._usrp = uhd.usrp_sink(device_addr="",
io_type=uhd.io_type.COMPLEX_FLOAT32,
num_channels=1
)
#set Tx Gain
self._usrp.set_gain(gain,0)
print "Gain d'board:",(n2s(gain)),"dB"
#Tune to center frequency
tr = self._usrp.set_center_freq(options.tx_freq, 0)
if not (tr):
print "Failed to tune to Tx frequency to %s" % (n2s(options.tx_freq))
else:
print "Actual center frequency",n2s(options.tx_freq)
def get_options():
parser = OptionParser(option_class=eng_option)
parser.add_option("--ip", "--device_addr",type="string",default="192.168.10.2",
help="device address[default=%default]")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set TX gain (default is midpoint)")
parser.add_option("-f", "--tx-freq", type="eng_float", default=None,
help="set Tx frequency to FREQ", metavar="FREQ")
parser.add_option("-a", "--amplitude", type="eng_float", default=2000,
help="set Tx amplitude (0-32767) (default=%default)")
parser.add_option("-r", "--rate", type="eng_float", default=250e3,
help="Select modulation symbol rate (default=%default)")
parser.add_option("", "--sps", type="int", default=2,
help="Select samples per symbol (default=%default)")
parser.add_option("", "--excess-bw", type="eng_float", default=0.35,
help="Select RRC excess bandwidth (default=%default)")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
if options.tx_freq == None:
print "Must supply frequency as -f or --freq"
sys.exit(1)
return (options, args)
if __name__ == "__main__":
(options, args) = get_options()
tb = tx_bpsk_block(options)
try:
tb.run()
except KeyboardInterrupt:
pass
Hi
Thanks marcus. I am new to Gnu Radio and Python. I am working on USRP N200 with RFX2400. I am trying to make digital-bert scripts to work for UHD. I made some changes in the code but i am encoutering errors. The latest error is shown below:
aravind@COE-CW85V91:~/gnuradio/gnuradio-examples/python/digital-bert$ ./benchmark_tx1.py --tx-freq=2500M -g 32 --ip=192.168.10.2
linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.001.002-5239879
>>> gr_fir_ccf: using SSE
Modulation: 250k bits/sec
TX IF rate: 500k samples/sec
USRP interpolation: 256
DAC amplitude: 2000
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 131071 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 131071 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
-- mboard0 is MIMO master
UHD Warning:
Unable to set the thread priority. Performance may be negatively affected.
Please see the general application notes in the manual for instructions.
EnvironmentError: OSError: error in pthread_setschedparam
Gain d'board: 32 dB
Actual center frequency 2.5G
UUterminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::math::rounding_error> >'
what(): Error in function boost::math::iround<d>(d): Value 7.3939377762685976e+134 can not be represented in the target integer type.
Aborted
any help or feedback will be appreciated.
Thanks
--Saketh
Hi
I am trying to make digital-bert scripts work with USRP N200, RFX2400. I have changed my code a little bit. But it shows me an error saying "object has no attribute".
aravind@COE-2X85V91:~/gnuradio/gnuradio-examples/python/digital-bert$ ./benchmark_tx1.py -f 2500M
linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.001.002-ba0e3c8
>>> gr_fir_ccf: using SSE
Modulation: 250k bits/sec
TX IF rate: 500k samples/sec
USRP interpolation: 256
DAC amplitude: 2000
Traceback (most recent call last):
File "./benchmark_tx1.py", line 108, in <module>
tb = tx_bpsk_block(options)
File "./benchmark_tx1.py", line 52, in __init__
self._setup_usrp(options.ip,
File "/usr/local/lib/python2.6/dist-packages/gnuradio/gr/top_block.py", line 94, in __getattr__
return getattr(self._tb, name)
AttributeError: 'gr_top_block_sptr' object has no attribute '_setup_usrp'
Can anyone help me out, how to resolve this error ? Attached is my little modified code.
--
Saketh Kumar
--
Saketh Kumar
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