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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @file
# @author Piotr Krysik <ptrkrysik@gmail.com>
# @section LICENSE
#
# Gr-gsm 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.
#
# Gr-gsm 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 gr-gsm; 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
from fn_time import fn_time_delta
import pmt
import numpy
class txtime_bursts_tagger(gr.basic_block):
"""
A block that adds txtime metadata to a burst
"""
def __init__(self, init_fn=0, init_time=0, time_hint=None):
gr.basic_block.__init__(self,
name="txtime_bursts_tagger",
in_sig=[],
out_sig=[])
self.set_fn_time_reference(init_fn, init_time)
if time_hint is not None:
self.set_time_hint(time_hint)
self.message_port_register_in(pmt.intern("fn_time"))
self.message_port_register_in(pmt.intern("bursts"))
self.message_port_register_out(pmt.intern("bursts"))
self.set_msg_handler(pmt.intern("fn_time"), self.process_fn_time_reference)
self.set_msg_handler(pmt.intern("bursts"), self.process_txtime_of_burst)
def process_fn_time_reference(self, msg):
time_hint = pmt.to_python(pmt.dict_ref(msg, pmt.intern("time_hint"), pmt.PMT_NIL))
fn_time = pmt.to_python(pmt.dict_ref(msg, pmt.intern("fn_time"), pmt.PMT_NIL))
# if self.fn_ref is None:
if time_hint is not None:
self.time_hint = time_hint
elif fn_time is not None:
self.fn_ref = fn_time[0][0]
self.ts = fn_time[0][1]
full = fn_time[1][0]
frac = fn_time[1][1]
self.time_ref = full+frac
self.time_hint = self.time_ref
def process_txtime_of_burst(self, msg):
burst_with_header = pmt.to_python(pmt.cdr(msg))
fn = burst_with_header[11]+burst_with_header[10]*2**8+burst_with_header[9]*2**16+burst_with_header[8]*2**24
ts_num = burst_with_header[3]
if self.fn_ref is not None:
fn_delta, txtime = fn_time_delta(self.fn_ref, self.time_ref, fn, self.time_hint, ts_num)
txtime_secs = int(txtime)
txtime_fracs = txtime-int(txtime)
#print "txtime_secs",txtime_secs,"txtime_fracs",txtime_fracs
tags_dict = pmt.dict_add(pmt.make_dict(), pmt.intern("tx_time"), pmt.make_tuple(pmt.from_uint64(txtime_secs),pmt.from_double(txtime_fracs)))
new_msg = pmt.cons(tags_dict, pmt.cdr(msg))
self.message_port_pub(pmt.intern("bursts"), new_msg)
def set_fn_time_reference(self, init_fn, init_time):
self.fn_ref = init_fn
self.time_ref = init_time
self.set_time_hint(init_time)
def set_time_hint(self, time_hint):
self.time_hint = time_hint
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