eive-obsw/gomspace/libcsp/utils/cfpsplit.py

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2020-11-19 18:24:03 +01:00
#!/usr/bin/env python
# Cubesat Space Protocol - A small network-layer protocol designed for Cubesats
# Copyright (C) 2012 GomSpace ApS (http://www.gomspace.com)
# Copyright (C) 2012 AAUSAT3 Project (http://aausat3.space.aau.dk)
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# Split CFP header in protocol fields
import sys
def usage():
print("usage: cfpsplit.py HEADER")
def main():
try:
hdr = sys.argv[1]
except:
usage()
sys.exit(-1)
try:
hdrhex = int(hdr, 16)
except:
print("HEADER must be in hexadecimal format")
sys.exit(-1)
if hdrhex > 0x1fffffff:
print("HEADER is not a valid CFP header")
sys.exit(-1)
print("Source: {0}".format((hdrhex >> 24) & 0x1f))
print("Destination: {0}".format((hdrhex >> 19) & 0x1f))
print("Type: {0}".format("MORE" if ((hdrhex >> 18) & 0x01) else "BEGIN"))
print("Remain: {0}".format((hdrhex >> 10) & 0xff))
print("Identifier: {0}".format((hdrhex >> 0) & 0x3ff))
if __name__ == "__main__":
main()