133 lines
4.5 KiB
Python
Executable File
133 lines
4.5 KiB
Python
Executable File
#!/usr/bin/env python
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#
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###############################################################################
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# Copyright (C) 2016-2018 Cortney T. Buffington, N0MJS <n0mjs@me.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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###############################################################################
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from bitarray import bitarray
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__author__ = 'Cortney T. Buffington, N0MJS'
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__copyright__ = 'Copyright (c) 2016-2018 Cortney T. Buffington, N0MJS and the K0USY Group'
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__credits__ = ''
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__license__ = 'GNU GPLv3'
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__maintainer__ = 'Cort Buffington, N0MJS'
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__email__ = 'n0mjs@me.com'
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# Slot Type Data types
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DMR_SLT_VHEAD = b'\x01'
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DMR_SLT_VTERM = b'\x02'
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# Sync patterns used for LC and Voice Burst A packets
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BS_VOICE_SYNC = bitarray()
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BS_DATA_SYNC = bitarray()
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BS_VOICE_SYNC.frombytes(b'\x75\x5F\xD7\xDF\x75\xF7')
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BS_DATA_SYNC.frombytes(b'\xDF\xF5\x7D\x75\xDF\x5D')
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SYNC = {
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'BS_VOICE': BS_VOICE_SYNC,
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'BS_DATA': BS_DATA_SYNC
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}
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# LC Options - G for Group, U for unit, LC_OPT is legacy for group.
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LC_OPT_G = b'\x00\x00\x00'
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LC_OPT_U = b'\x03\x00\x00'
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LC_OPT = LC_OPT_G
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# Precomputed EMB values, where CC always = 1, and PI always = 0
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EMB = {
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'BURST_B': bitarray('0001001110010001'),
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'BURST_C': bitarray('0001011101110100'),
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'BURST_D': bitarray('0001011101110100'),
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'BURST_E': bitarray('0001010100000111'),
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'BURST_F': bitarray('0001000111100010')
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}
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# Precomputed Slot Type values where CC always = 1
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SLOT_TYPE = {
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'PI_HEAD': bitarray('00010000001101100111'),
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'VOICE_LC_HEAD': bitarray('00010001101110001100'),
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'VOICE_LC_TERM': bitarray('00010010101001011001'),
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'CSBK': bitarray('00010011001010110010'),
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'MBC_HEAD': bitarray('00010100100111110000'),
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'MBC_CONT': bitarray('00010101000100011011'),
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'DATA_HEAD': bitarray('00010110000011001110'),
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'1/2_DATA': bitarray('00010111100000100101'),
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'3/4_DATA': bitarray('00011000111010100001'),
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'IDLE': bitarray('00011001011001001010'),
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'1/1_DATA': bitarray('00011010011110011111'),
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'RES_1': bitarray('00011011111101110100'),
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'RES_2': bitarray('00011100010000110110'),
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'RES_3': bitarray('00011101110011011101'),
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'RES_4': bitarray('00011110110100001000'),
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'RES_5': bitarray('00011111010111100011')
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}
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# LC infor for first 3 Bytes:
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# Byte 1: PF (1),Res(1),FLCO(6) -- Byte 2: FID(8) -- Byte 3: Service Options(8)
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LC_VOICE = {
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'FLCO-GRP': bitarray('00000000'),
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'FLCO-USR': bitarray('00000011'),
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'FID-GENC': bitarray('00000000'),
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'FID-MOTO': bitarray('00010000'),
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'SVC-OVCM': bitarray('00100000'),
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'SVC-NONE': bitarray('00000000')
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}
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# Data Type as defined for use in the Slot Type Message
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DATA_TYPE = {
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'PI_HEAD': bitarray('0000'),
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'VOICE_LC_HEAD': bitarray('0001'),
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'VOICE_LC_TERM': bitarray('0010'),
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'CSBK': bitarray('0011'),
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'MBC_HEAD': bitarray('0100'),
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'MBC_CONT': bitarray('0101'),
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'DATA_HEAD': bitarray('0110'),
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'1/2_RATE': bitarray('0111'),
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'3/4_RATE': bitarray('1000'),
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'IDLE': bitarray('1001'),
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'1/1_RATE': bitarray('1010'),
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'RES_1': bitarray('1011'),
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'RES_2': bitarray('1100'),
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'RES_3': bitarray('1101'),
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'RES_4': bitarray('1110'),
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'RES_5': bitarray('1111')
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}
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'''
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EMB: CC(4b), PI(1b), LCSS(2b), EMB Parity(9b - QR 16,7,5)
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Slot Type: CC(4b), DataType(4), Slot Type Parity(12b - )
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'''
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#------------------------------------------------------------------------------
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# Used to execute the module directly to run built-in tests
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#------------------------------------------------------------------------------
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if __name__ == '__main__':
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from pprint import pprint
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pprint(SYNC)
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pprint(EMB)
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pprint(SLOT_TYPE)
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print(LC_OPT)
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