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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
import pmt
from . import space_packet
import array
class space_packet_primaryheader_adder(gr.basic_block):
"""
docstring for block space_packet_primaryheader_adder
"""
def __init__(self, packet_type, secondary_header_flag, AP_ID, count_or_name, packet_sequence_name):
gr.basic_block.__init__(self,
name="space_packet_primaryheader_adder",
in_sig=[],
out_sig=[])
##################################################
# Parameters
##################################################
self.ccsds_version = 0
self.packet_type = packet_type
self.secondary_header_flag = secondary_header_flag
self.AP_ID = AP_ID
self.sequence_flags = 3
self.packet_sequence_count = 0
self.packet_sequence_name = packet_sequence_name
self.count_or_name = count_or_name
self.data_length = 0
##################################################
# 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)
self.data_length = len(packet)
self.packet_sequence_count += 1
count_or_name = self.packet_sequence_count if self.packet_type == 0 or self.count_or_name == 0 else self.packet_sequence_name
finalHeader = array.array('B', space_packet.PrimaryHeader.build(dict(ccsds_version = self.ccsds_version,
packet_type = self.packet_type,
secondary_header_flag = self.secondary_header_flag,
AP_ID = self.AP_ID,
sequence_flags = self.sequence_flags,
packet_sequence_count_or_name = count_or_name,
data_length = self.data_length))).tolist()
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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