[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] question of dual transmitter/receiver
From: |
Fisheep |
Subject: |
Re: [Discuss-gnuradio] question of dual transmitter/receiver |
Date: |
Mon, 26 Jul 2010 05:55:24 -0700 (PDT) |
Hi,
It seems you have two daughterboards on one USRP1, and you want to
communicate with these two daughterboards.
Maybe you could take a look at fm_tx_2_daughterboards.py first(in
/gnuradio-examples/python/usrp/.).
>From your code, I think you didn't modify the USRP setting that causes your
code fail.
Hope that helps,
Fisheep
YouheiFujii wrote:
>
> Hi all,
>
> I'd like to ask some questions about dual transmitter/receiver on USRP1.
>
> I want to make dual transmitter/receiver
> by remodeling benchmark_tx/rx.py.
>
> In detail,
> I want to use two daughterboard (two FLEX400) on one USRP1.
> The pair of side-A transmit and receive on 412MHz,
> and the pair of side-B transmit and receive on 420MHz.
>
>
> USRP1(tx only) USRP1(rx only)
> +------------+ +------------+
> | | | |
> |db1: | 420MHz |db1: |
> | FLEX400(A)------------FLEX400(A) |
> | | | |
> |db2: | |db2: |
> | FLEX400(B)------------FLEX400(B) |
> | | 412MHz | |
> +------------+ +------------+
>
>
> Now I made tx-node's program like attachment file,
> and execute this file.
> -----
> $ sudo python dual_tx.py -f 412M
> -----
>
> However, I got the following error.
> -----
> user:/usr/share/gnuradio/examples/digital$ sudo python dual_tx.py -f 412M
> {'verbose': False, 'discontinuous': False, 'samples_per_symbol': 2,
> 'usrpx': None, 'interp': None, 'fusb_block_size': 0, 'megabytes': 1.0,
> 'rx_freq': 412000000.0, 'size': 1500, 'show_tx_gain_range': False,
> 'log': False, 'tx_subdev_spec': (0, 0), 'fusb_nblocks': 0, 'lo_offset':
> None, 'tx_gain': None, 'which': 0, 'modulation': 'gmsk', 'excess_bw':
> 0.34999999999999998, 'bt': 0.34999999999999998, 'interface': 'eth0',
> 'freq': None, 'bitrate': 100000.0, 'from_file': None, 'tx_freq':
> 420000000, 'mac_addr': '', 'tx_amplitude': 0.25, 'gray_code': True}
>>>> gr_fir_fff: using SSE
> Requested TX Bitrate: 100k Actual Bitrate: 125k
> @@@@@
> {'verbose': False, 'discontinuous': False, 'samples_per_symbol': 2,
> 'usrpx': None, 'interp': None, 'fusb_block_size': 0, 'megabytes': 1.0,
> 'rx_freq': 412000000.0, 'size': 1500, 'show_tx_gain_range': False,
> 'log': False, 'tx_subdev_spec': (1, 0), 'fusb_nblocks': 0, 'lo_offset':
> None, 'tx_gain': None, 'which': 0, 'modulation': 'gmsk', 'excess_bw':
> 0.34999999999999998, 'bt': 0.34999999999999998, 'interface': 'eth0',
> 'freq': None, 'bitrate': 100000.0, 'from_file': None, 'tx_freq':
> 412000000, 'mac_addr': '', 'tx_amplitude': 0.25, 'gray_code': True}
> usrp_open_interface:usb_claim_interface: failed interface 1
> could not claim interface 1: Device or resource busy
> usrp_basic_tx: can't open tx interface
> Traceback (most recent call last):
> File "dual_tx.py", line 150, in <module>
> main()
> File "dual_tx.py", line 109, in main
> tb = my_top_block(mods[options.modulation], options)
> File "dual_tx.py", line 54, in __init__
> self.txpath_b = usrp_transmit_path.usrp_transmit_path(modulator,
> options)
> File "/usr/share/gnuradio/examples/digital/usrp_transmit_path.py",
> line 67, in __init__
> self._setup_usrp_sink(options)
> File "/usr/share/gnuradio/examples/digital/usrp_transmit_path.py",
> line 76, in _setup_usrp_sink
> self.u = usrp_options.create_usrp_sink(options)
> File "/usr/share/gnuradio/examples/digital/usrp_options.py", line 119,
> in create_usrp_sink
> gain=options.tx_gain,
> File "/usr/share/gnuradio/examples/digital/generic_usrp.py", line 199,
> in __init__
> _generic_usrp_base.__init__(self, **kwargs)
> File "/usr/share/gnuradio/examples/digital/generic_usrp.py", line 57,
> in __init__
> elif usrpx == '1' or self._subdev_spec: self._setup_usrpx(USRP1_TYPE)
> File "/usr/share/gnuradio/examples/digital/generic_usrp.py", line 76,
> in _setup_usrpx
> if self._type == USRP1_TYPE: self._setup_usrp1()
> File "/usr/share/gnuradio/examples/digital/generic_usrp.py", line 229,
> in _setup_usrp1
> fusb_nblocks=self._fusb_nblocks)
> File "/usr/lib/python2.6/dist-packages/gnuradio/usrp/usrp_swig.py",
> line 2412, in sink_c
> return _usrp_swig.sink_c(*args, **kwargs)
> RuntimeError: can't open usrp
> user:/usr/share/gnuradio/examples/digital$
> -----
>
>
> I think, I couldn't make two txpath.
> (I can make "txpath_a", but can't make "txpath_b")
> But we can make two path ( txpath and rxpath) in tunnel.py.
> Why I can't make two txpath like this way?
>
> I can't make dual transmit path like this way.
>
> Does anyone has some idea to make ?
> If you know, please tell me dual transmit path technique.
>
>
> Thanks,
> youhei
>
>
>
> #!/usr/bin/env python
> #
> # Copyright 2005,2006,2007,2009 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, gru, modulation_utils
> from gnuradio import usrp
> from gnuradio import eng_notation
> from gnuradio.eng_option import eng_option
> from optparse import OptionParser
>
> import random, time, struct, sys
>
> # from current dir
> import usrp_transmit_path
>
> #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)
>
> # options setting for side A
> options.tx_subdev_spec = (0,0)
> options.tx_freq = 420000000
> print options
> self.txpath_a = usrp_transmit_path.usrp_transmit_path(modulator,
> options)
> print "@@@@@"
>
> # options setting for side B
> options.tx_subdev_spec = (1,0)
> options.tx_freq = 412000000
> print options
> self.txpath_b = usrp_transmit_path.usrp_transmit_path(modulator,
> options)
> print "@@@@@"
>
> self.connect(self.txpath_a)
> self.connect(self.txpath_b)
>
>
> #
> /////////////////////////////////////////////////////////////////////////////
> # main
> #
> /////////////////////////////////////////////////////////////////////////////
>
> def main():
>
> def rx_callback(ok, payload):
> print "ok = %r, payload = '%s'" % (ok, payload)
>
> mods = 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 file for packet contents")
>
> usrp_transmit_path.add_options(parser, expert_grp)
>
> for mod in mods.values():
> mod.add_options(expert_grp)
>
> (options, args) = parser.parse_args ()
>
> if len(args) != 0:
> parser.print_help()
> sys.exit(1)
>
> if options.tx_freq is None:
> sys.stderr.write("You must specify -f FREQ or --freq FREQ\n")
> parser.print_help(sys.stderr)
> 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)
>
> while n < nbytes:
> if options.from_file is None:
> data = (pkt_size - 2) * chr(pktno & 0xff)
> else:
> data = source_file.read(pkt_size - 2)
> if data == '':
> break;
>
> payload = struct.pack('!H', pktno & 0xffff) + data
>
> tb.txpath_a.send_pkt(payload) #0724#
> tb.txpath_b.send_pkt(payload) #0724#
>
> n += len(payload)
> sys.stderr.write('.')
> if options.discontinuous and pktno % 5 == 4:
> time.sleep(1)
> pktno += 1
>
> tb.txpath_a.send_pkt_a(eof=True) #0724#
> tb.txpath_b.send_pkt_b(eof=True) #0724#
>
> tb.wait() # wait for it to finish
>
> if __name__ == '__main__':
> try:
> main()
> except KeyboardInterrupt:
> pass
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
--
View this message in context:
http://old.nabble.com/question-of-dual-transmitter-receiver-tp29253936p29266247.html
Sent from the GnuRadio mailing list archive at Nabble.com.