1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
#!/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 telemetry
class telemetry_parser(gr.basic_block):
"""
docstring for block CCSDS telemetry_parser
"""
def __init__(self):
gr.basic_block.__init__(self,
name="telemetry_parser",
in_sig=[],
out_sig=[])
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 = bytearray(pmt.u8vector_elements(msg))
size = len(packet) - 6
try:
header = telemetry.PrimaryHeader.parse(packet[:])
if header.ocf_flag == 1:
size -= 4
data = telemetry.FullPacket.parse(packet[:], size=size)
except:
print("Could not decode telemetry packet")
return
print(data)
self.message_port_pub(pmt.intern('out'), msg_pmt)
|
