diff options
Diffstat (limited to 'gnuradio-core/src/python/gnuradio/blks2impl/pkt.py')
| -rw-r--r-- | gnuradio-core/src/python/gnuradio/blks2impl/pkt.py | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/pkt.py b/gnuradio-core/src/python/gnuradio/blks2impl/pkt.py deleted file mode 100644 index 908437ef2b..0000000000 --- a/gnuradio-core/src/python/gnuradio/blks2impl/pkt.py +++ /dev/null @@ -1,164 +0,0 @@ -# -# Copyright 2005, 2006, 2007 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 math import pi -from gnuradio import gr, packet_utils -import gnuradio.gr.gr_threading as _threading - - -# ///////////////////////////////////////////////////////////////////////////// -# mod/demod with packets as i/o -# ///////////////////////////////////////////////////////////////////////////// - -class mod_pkts(gr.hier_block2): - """ - Wrap an arbitrary digital modulator in our packet handling framework. - - Send packets by calling send_pkt - """ - def __init__(self, modulator, access_code=None, msgq_limit=2, pad_for_usrp=True, use_whitener_offset=False): - """ - Hierarchical block for sending packets - - Packets to be sent are enqueued by calling send_pkt. - The output is the complex modulated signal at baseband. - - @param modulator: instance of modulator class (gr_block or hier_block2) - @type modulator: complex baseband out - @param access_code: AKA sync vector - @type access_code: string of 1's and 0's between 1 and 64 long - @param msgq_limit: maximum number of messages in message queue - @type msgq_limit: int - @param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples - @param use_whitener_offset: If true, start of whitener XOR string is incremented each packet - - See gmsk_mod for remaining parameters - """ - - gr.hier_block2.__init__(self, "mod_pkts", - gr.io_signature(0, 0, 0), # Input signature - gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature - - self._modulator = modulator - self._pad_for_usrp = pad_for_usrp - self._use_whitener_offset = use_whitener_offset - self._whitener_offset = 0 - - if access_code is None: - access_code = packet_utils.default_access_code - if not packet_utils.is_1_0_string(access_code): - raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,) - self._access_code = access_code - - # accepts messages from the outside world - self._pkt_input = gr.message_source(gr.sizeof_char, msgq_limit) - self.connect(self._pkt_input, self._modulator, self) - - def send_pkt(self, payload='', eof=False): - """ - Send the payload. - - @param payload: data to send - @type payload: string - """ - if eof: - msg = gr.message(1) # tell self._pkt_input we're not sending any more packets - else: - # print "original_payload =", string_to_hex_list(payload) - pkt = packet_utils.make_packet(payload, - self._modulator.samples_per_symbol(), - self._modulator.bits_per_symbol(), - self._access_code, - self._pad_for_usrp, - self._whitener_offset) - #print "pkt =", string_to_hex_list(pkt) - msg = gr.message_from_string(pkt) - if self._use_whitener_offset is True: - self._whitener_offset = (self._whitener_offset + 1) % 16 - - self._pkt_input.msgq().insert_tail(msg) - - - -class demod_pkts(gr.hier_block2): - """ - Wrap an arbitrary digital demodulator in our packet handling framework. - - The input is complex baseband. When packets are demodulated, they are passed to the - app via the callback. - """ - - def __init__(self, demodulator, access_code=None, callback=None, threshold=-1): - """ - Hierarchical block for demodulating and deframing packets. - - The input is the complex modulated signal at baseband. - Demodulated packets are sent to the handler. - - @param demodulator: instance of demodulator class (gr_block or hier_block2) - @type demodulator: complex baseband in - @param access_code: AKA sync vector - @type access_code: string of 1's and 0's - @param callback: function of two args: ok, payload - @type callback: ok: bool; payload: string - @param threshold: detect access_code with up to threshold bits wrong (-1 -> use default) - @type threshold: int - """ - - gr.hier_block2.__init__(self, "demod_pkts", - gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature - gr.io_signature(0, 0, 0)) # Output signature - - self._demodulator = demodulator - if access_code is None: - access_code = packet_utils.default_access_code - if not packet_utils.is_1_0_string(access_code): - raise ValueError, "Invalid access_code %r. Must be string of 1's and 0's" % (access_code,) - self._access_code = access_code - - if threshold == -1: - threshold = 12 # FIXME raise exception - - self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY - self.correlator = gr.correlate_access_code_bb(access_code, threshold) - - self.framer_sink = gr.framer_sink_1(self._rcvd_pktq) - self.connect(self, self._demodulator, self.correlator, self.framer_sink) - - self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback) - - -class _queue_watcher_thread(_threading.Thread): - def __init__(self, rcvd_pktq, callback): - _threading.Thread.__init__(self) - self.setDaemon(1) - self.rcvd_pktq = rcvd_pktq - self.callback = callback - self.keep_running = True - self.start() - - - def run(self): - while self.keep_running: - msg = self.rcvd_pktq.delete_head() - ok, payload = packet_utils.unmake_packet(msg.to_string(), int(msg.arg1())) - if self.callback: - self.callback(ok, payload) |