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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 telecommand
import array
class telecommand_primaryheader_adder(gr.basic_block):
"""
docstring for block telecommand_primaryheader_adder
"""
def __init__(self, bypass, control, spacecraft_id, virtual_channel_id):
gr.basic_block.__init__(self,
name="telecommand_primaryheader_adder",
in_sig=[],
out_sig=[])
##################################################
# Parameters
##################################################
self.transfer_frame_version = 0
self.bypass = bypass
self.control = control
self.RSVD_spare = 0
self.spacecraft_id = spacecraft_id
self.virtual_channel_id = virtual_channel_id
self.frame_length = 0
self.frame_sequence_number = 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.frame_length = len(packet) + 5
if self.bypass == 1:
self.frame_sequence_number = 0
else:
self.frame_sequence_number += 1
finalHeader = array.array('B', telecommand.PrimaryHeader.build(dict(transfer_frame_version = self.transfer_frame_version,
bypass = self.bypass,
control = self.control,
RSVD_spare = self.RSVD_spare,
spacecraft_id = self.spacecraft_id,
virtual_channel_id = self.virtual_channel_id,
frame_length = self.frame_length,
frame_sequence_number = self.frame_sequence_number))).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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