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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2019 Athanasios Theocharis <athatheoc@gmail.com>
# This was made under ESA Summer of Code in Space 2019
# by Athanasios Theocharis, mentored by Daniel Estevez
#
# This file is part of gr-satellites
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
import numpy
from gnuradio import gr
from datetime import datetime
from datetime import timedelta
import construct
import pmt
import array
from . import space_packet
class space_packet_time_stamp_adder(gr.basic_block):
"""
Time Stamp Adder (CCSDS 301.0-B-4)
--- The user should study the time code formats book and fill only the necessary fields.
--- The user, in general, should check the code of the preferred time format and confirm that the behavior is
the wanted one. Great care should be taken on the variability of the size. (E.g. in ASCII A time format,
the user should define the size of the decimal fraction of the second subfield and should change the finalHeader array.)
--- Automated time only prints a timestamp down to microseconds
--- When defining an epoch, the user should check that it fits into the bytes that were assigned to hold the difference.
E.g. If the epoch "0001 January 1" is defined in CDS, then it will not be able to fit today's date into a 16-bit
DAYS part.
"""
def __init__(self, input_manual_automatic, time_format, pfield, pfield_extension, time_code_identification_cuc,
epoch_year_cuc, epoch_month_cuc, epoch_day_cuc, pfield_extension_extended,rsvd_cuc,
time_code_identification_cds, epoch_identification_cds, epoch_year_cds, epoch_month_cds, epoch_day_cds,
time_code_identification_ccs, year, month, day, hour, minute, second, microsecond, picosecond, id_time):
gr.basic_block.__init__(self,
name="space_packet_time_stamp_adder",
in_sig=[],
out_sig=[])
##################################################
# Parameters
##################################################
self.input_manual_automatic = input_manual_automatic
self.time_format = time_format
self.pfield = pfield #Checks if the P-Field will be used
self.pfield_extension = pfield_extension #Checks if the PField will be extended
self.time_code_identification_cuc = time_code_identification_cuc
self.epoch_year_cuc = epoch_year_cuc
self.epoch_month_cuc = epoch_month_cuc
self.epoch_day_cuc = epoch_day_cuc
self.basic_time_num_octets_cuc = id_time.basic_time_num_octets_cuc
self.fractional_time_num_octets_cuc = id_time.fractional_time_num_octets_cuc
self.pfield_extension_extended = pfield_extension_extended #Checks if the PField Extension will be extended
self.additional_octets_basic_time_cuc = id_time.additional_basic_time_num_octets_cuc
self.additional_octets_fractional_time_cuc = id_time.additional_fractional_time_num_octets_cuc
self.rsvd_cuc = rsvd_cuc
self.time_code_identification_cds = time_code_identification_cds
self.epoch_identification_cds = epoch_identification_cds
self.epoch_year_cds = epoch_year_cds
self.epoch_month_cds = epoch_month_cds
self.epoch_day_cds = epoch_day_cds
self.length_of_day_cds = id_time.len_of_day
self.length_of_submillisecond_cds = id_time.len_of_submilsecs
self.time_code_identification_ccs = time_code_identification_ccs
self.calendar_variation_ccs = id_time.calendar_variation
self.number_of_subsecond_ccs = id_time.num_of_subsecs
self.add_z_terminator = id_time.add_z
self.ascii_dec_num = id_time.ascii_dec
self.year = year
self.month = month
self.day = day
self.hour = hour
self.minute = minute
self.second = second
self.microsecond = microsecond
self.picosecond = picosecond
self.id_time = id_time
if self.time_code_identification_cuc == 1:
self.epoch_cuc = datetime(1958, 1, 1)
else:
self.epoch_cuc = datetime(self.epoch_year_cuc, self.epoch_month_cuc, self.epoch_day_cuc)
if self.epoch_identification_cds == 0:
self.epoch_cds = datetime(1958, 1, 1)
else:
self.epoch_cds = datetime(self.epoch_year_cds, self.epoch_month_cds, self.epoch_day_cds)
##################################################
# Blocks
##################################################
self.message_port_register_in(pmt.intern('in'))
self.set_msg_handler(pmt.intern('in'), self.handle_msg)
self.message_port_register_out(pmt.intern('out'))
def handle_msg(self, msg_pmt):
msg = pmt.cdr(msg_pmt)
if not pmt.is_u8vector(msg):
print()
"[ERROR] Received invalid message type. Expected u8vector"
return
packet = pmt.u8vector_elements(msg)
if self.input_manual_automatic == 1:
self.now = datetime.utcnow()
if self.length_of_submillisecond_cds >= 2:
self.length_of_submillisecond_cds = 1
if self.number_of_subsecond_ccs >= 4:
self.length_of_susecond_ccs = 3
else:
self.now = datetime(self.year, self.month, self.day, self.hour, self.minute, self.second, self.microsecond)
finalHeader = []
if self.time_format == 0: #CUC
basic_time = 1 + self.basic_time_num_octets_cuc
fractional_time = self.fractional_time_num_octets_cuc
if self.pfield == 1: #If it exists
finalHeader.extend(array.array('B', space_packet.PFieldCUC.build(
dict(pfield_extension=self.pfield_extension,
time_code_identification=self.time_code_identification_cuc,
number_of_basic_time_unit_octets=self.basic_time_num_octets_cuc,
number_of_fractional_time_unit_octets=self.fractional_time_num_octets_cuc))).tolist())
if self.pfield_extension == 1: #If it is extended
basic_time += self.additional_octets_basic_time_cuc
fractional_time +=self.additional_octets_fractional_time_cuc
finalHeader.extend(array.array('B', space_packet.PFieldCUCExtension.build(
dict(pfieldextension=self.pfield_extension_extended,
number_of_additional_basic_time_unit_octets=self.additional_octets_basic_time_cuc,
number_of_additional_fractional_time_unit_octets=self.additional_octets_fractional_time_cuc,
reserved_for_mission_definition=self.rsvd_cuc))).tolist())
temp_diff = self.now - self.epoch_cuc
total_basic = int(temp_diff.total_seconds())
total_frac = int((temp_diff.total_seconds() - total_basic)*(256**fractional_time))
finalHeader.extend(array.array('B', construct.BytesInteger(basic_time).build(total_basic)).tolist())
finalHeader.extend(array.array('B', construct.BytesInteger(fractional_time).build(total_frac)).tolist())
elif self.time_format == 1: #CDS
if self.pfield == 1:
finalHeader.extend(array.array('B', space_packet.PFieldCDS.build(dict(pfield_extension = self.pfield_extension,
time_code_identification = self.time_code_identification_cds,
epoch_identification = self.epoch_identification_cds,
length_of_day_segment = self.length_of_day_cds,
length_of_submillisecond_segment = self.length_of_submillisecond_cds))).tolist())
days_len = 2 if self.length_of_day_cds == 0 else 3
finalHeader.extend(
array.array('B', construct.BytesInteger(days_len).build((self.now - self.epoch_cds).days)).tolist())
finalHeader.extend(array.array('B', construct.Int32ub.build(self.now.microsecond/1000)).tolist())
if self.length_of_submillisecond_cds == 1:
finalHeader.extend(array.array('B', construct.Int16ub.build(self.now.microsecond % 1000)).tolist())
elif self.length_of_submillisecond_cds == 2:
finalHeader.extend(array.array('B', construct.Int32ub.build(self.picosecond)).tolist())
elif self.time_format == 2: #CCS
if self.pfield == 1:
finalHeader.extend(array.array('B', space_packet.PFieldCCS.build(dict(pfield_extension = self.pfield_extension,
time_code_identification = self.time_code_identification_ccs,
calendar_variation_flag = self.calendar_variation_ccs,
resolution=self.number_of_subsecond_ccs))).tolist())
finalHeader.extend(array.array('B', construct.Int16ub.build(self.now.year)).tolist())
if self.calendar_variation_ccs == 0:
finalHeader.extend(array.array('B', construct.Int8ub.build(self.now.month)).tolist())
finalHeader.extend(array.array('B', construct.Int8ub.build(self.now.day)).tolist())
else:
finalHeader.extend(array.array('B', construct.Int16ub.build(self.now.timetuple().tm_yday)).tolist())
finalHeader.extend(array.array('B', construct.Int8ub.build(self.now.hour)).tolist())
finalHeader.extend(array.array('B', construct.Int8ub.build(self.now.minute)).tolist())
finalHeader.extend(array.array('B', construct.Int8ub.build(self.now.second)).tolist())
if self.number_of_subsecond_ccs >= 1:
finalHeader.extend(array.array('B', construct.Int8ub.build(self.now.microsecond / 10 ** 4)).tolist())
if self.number_of_subsecond_ccs >= 2:
finalHeader.extend(
array.array('B', construct.Int8ub.build((self.now.microsecond / 10 ** 2) % 10 ** 2)).tolist())
if self.number_of_subsecond_ccs >= 3:
finalHeader.extend(array.array('B', construct.Int8ub.build(self.now.microsecond % 10 ** 2)).tolist())
if self.number_of_subsecond_ccs >= 4:
finalHeader.extend(
array.array('B', construct.Int8ub.build((self.picosecond % 10 ** 6) / 10 ** 4)).tolist())
if self.number_of_subsecond_ccs >= 5:
finalHeader.extend(
array.array('B', construct.Int8ub.build((self.picosecond % 10 ** 4) / 10 ** 2)).tolist())
if self.number_of_subsecond_ccs >= 6:
finalHeader.extend(array.array('B', construct.Int8ub.build(self.picosecond % 10 ** 2)).tolist())
elif self.time_format == 3 or self.time_format == 4:
if(self.ascii_dec_num < 0 or self.ascii_dec_num > 6):
print("Decimals of ASCII in Time Stamp Adder block should be between 0 and 6. The number was automatically set to 1.")
self.ascii_dec_num = 1
if self.time_format == 3: # ASCII A
arr = self.now.isoformat()
else: #ASCII B
arr = self.now.strftime("%Y-%jT%H:%M:%S.%f")
arr = arr[: -(6 - self.ascii_dec_num)]
if (self.add_z_terminator == 1):
arr += 'Z'
finalHeader= array.array('B', arr).tolist()
else:
print("Time Format Unknown")
finalPacket = numpy.append(finalHeader, packet)
finalPacket = array.array('B', finalPacket[:])
finalPacket = pmt.cons(pmt.PMT_NIL, pmt.init_u8vector(len(finalPacket), finalPacket))
self.message_port_pub(pmt.intern('out'), finalPacket)
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