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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
class pathID_demultiplexer(gr.basic_block):
"""
docstring for block pathID_demultiplexer
"""
def __init__(self, pathID_outputs):
gr.basic_block.__init__(self,
name="pathID_demultiplexer",
in_sig=[],
out_sig=[])
self.pathID_outputs = pathID_outputs
self.message_port_register_in(pmt.intern('in'))
self.outputDict = {}
for i in range(len(pathID_outputs)):
self.outputDict[pathID_outputs[i]] = i
self.message_port_register_out(pmt.intern('out'+str(i)))
self.message_port_register_out(pmt.intern('discarded'))
self.set_msg_handler(pmt.intern('in'), self.handle_msg)
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 = bytearray(pmt.u8vector_elements(msg))
try:
data = space_packet.PrimaryHeader.parse(packet[:])
except:
print("Could not decode space packet primary header")
return
outPort = data.AP_ID
try:
port = self.outputDict[outPort]
except KeyError:
self.message_port_pub(pmt.intern('discarded'), msg_pmt)
print("Discarded message")
else:
self.message_port_pub(pmt.intern('out' + str(port)), msg_pmt)
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