56 lines
1.7 KiB
Python
Executable File
56 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
from gnuradio import gr, gru, audio, eng_notation, analog, blocks, filter
|
|
from gnuradio.eng_option import eng_option
|
|
from optparse import OptionParser
|
|
import numpy as np
|
|
|
|
import op25_repeater
|
|
import lfsr
|
|
|
|
class app_top_block(gr.top_block):
|
|
def __init__(self, options):
|
|
gr.top_block.__init__(self, "mhp")
|
|
|
|
self.lfsr = lfsr.p25p2_lfsr(options.nac, options.sysid, options.wacn)
|
|
xor_mask = ''
|
|
for c in self.lfsr.xorsyms:
|
|
xor_mask += chr(c)
|
|
|
|
IN = blocks.file_source(gr.sizeof_char, options.input_file)
|
|
|
|
slotid = options.tdma_slotid
|
|
FRAMER = op25_repeater.p25p2_frame(0, slotid)
|
|
FRAMER.set_xormask(xor_mask)
|
|
|
|
S2F = blocks.short_to_float()
|
|
M = blocks.multiply_const_ff(1.0 / 32767.0)
|
|
|
|
SINK = audio.sink(8000, 'plughw:0,0')
|
|
|
|
self.connect(IN, FRAMER, S2F, M, SINK)
|
|
|
|
def main():
|
|
parser = OptionParser(option_class=eng_option)
|
|
parser.add_option("-v", "--verbose", action="store_true", default=False)
|
|
parser.add_option("-i", "--input-file", type="string", default=None, help="input file name")
|
|
parser.add_option("-n", "--nac", type="int", default=0, help="NAC")
|
|
parser.add_option("-s", "--sysid", type="int", default=0, help="sysid")
|
|
parser.add_option("-t", "--tdma-slotid", type="int", default=0, help="tdma-slotid (0 or 1)")
|
|
parser.add_option("-w", "--wacn", type="int", default=0, help="WACN")
|
|
(options, args) = parser.parse_args()
|
|
if len(args) != 0:
|
|
parser.print_help()
|
|
sys.exit(1)
|
|
|
|
assert options.tdma_slotid == 0 or options.tdma_slotid == 1
|
|
|
|
tb = app_top_block(options)
|
|
try:
|
|
tb.run()
|
|
except KeyboardInterrupt:
|
|
tb.stop()
|
|
|
|
if __name__ == "__main__":
|
|
main()
|