125 lines
3.4 KiB
Python
125 lines
3.4 KiB
Python
#!/usr/bin/python
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"""
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Written by: Tony Tiger 6/2019
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This program generates manchester encoded data packets for LRS pagers and GNU Radio.
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Output file name: pager.bin
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Watch the YouTube video for more information: https://www.youtube.com/watch?v=ycLLb4eVZpI
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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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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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import sys
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import re
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import struct
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def encode_manchester( bin_list ):
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pre = [] # create extra preambles to wake up the pager
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for x in range(0,50):
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pre.append('1')
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pre.append('0')
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l = re.findall('.', "".join( pre + bin_list ) ) # join the preamble and the rest of the packet
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m = []
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print '\n'
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print "".join(str(x) for x in l) # convert list to string
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for x in l: # convert to manchaster coding
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if( x == '0'):
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m.append(1)
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m.append(0)
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if( x == '1'):
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m.append(0)
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m.append(1)
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return m
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# calculate the crc
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def calculate_crc( pre, sink_word, rest_id, station_id, pager_n, alert_type ):
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l = re.findall('..', pre + sink_word + rest_id + station_id + pager_n + '0000000000' + alert_type )
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bin_array = []
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for c in l:
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bin_array.append ( (format( int(c, 16) , '08b')))
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sum=0
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for b in bin_array:
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sum += int(b , 2)
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print '\n{0} {1} {2} {3} {4} {5} {6} {7}'.format( pre, sink_word, rest_id, station_id, pager_n, '0000000000', alert_type, format( ( sum % 255), '02x' ))
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bin_array.append( format( ( sum % 255), '08b') )
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return bin_array
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##########################################
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# main program start #
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##########################################
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try:
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rest_id=int(raw_input('\nEnter restaurant id 0-255: '))
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except ValueError:
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print "Not a number"
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try:
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pagers=(raw_input('Enter one or more pager numbers 0-1023 : '))
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except ValueError:
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print "Not a number"
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pager_list = []
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pager_list = map( int, re.split('\s+',pagers))
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print '1 Flash 30 Seconds\n2 Flash 5 Minutes\n3 Flash/Beep 5X5\n4 Beep 3 Times\n5 Beep 5 Minutes\n6 Glow 5 Minutes\n7 Glow/Vib 15 Times\n10 Flash/Vib 1 Second\n68 beep 3 times\n'
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try:
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alert_type=int(raw_input('Enter alert type: '))
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except ValueError:
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print "Not a number"
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handle = open('pager.bin', 'wb')
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data = []
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for pager_n in pager_list:
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crc_out = ( calculate_crc( format(11184810, '06x') , format( 64557,'04x'), format(rest_id, '02x'), '0', format( pager_n ,'03x' ), format(alert_type, '02x') ) )
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data = encode_manchester( crc_out )
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[ data.append(0) for x in range(0,100) ]
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print '\n';
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print "".join(str(x) for x in data)
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print '\n'
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for d in data:
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if d == 0:
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handle.write(struct.pack('f', .0001))
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elif d == 1:
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handle.write(struct.pack('f', 1))
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else:
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print "Error detected in data"
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sys.exit()
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handle.close()
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