2019-05-14 23:09:55 -04:00
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#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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##################################################
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# GNU Radio Python Flow Graph
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# Title: Top Block
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2019-06-02 10:46:00 -04:00
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# Generated: Sat Jun 1 12:54:09 2019
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2019-05-14 23:09:55 -04:00
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##################################################
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from gnuradio import analog
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from gnuradio import blocks
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from gnuradio import eng_notation
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from gnuradio import filter
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from gnuradio import gr
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from gnuradio.eng_option import eng_option
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from gnuradio.filter import firdes
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from optparse import OptionParser
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import osmosdr
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import time
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import socket
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import re
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2019-06-02 10:46:00 -04:00
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2019-05-14 23:09:55 -04:00
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class top_block(gr.top_block):
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def __init__(self):
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gr.top_block.__init__(self, "Top Block")
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##################################################
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# Variables
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##################################################
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2019-06-02 10:46:00 -04:00
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self.samp_rate = samp_rate = 2.2e6
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self.freq = freq = 101.5e6
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self.audio_rate = audio_rate = 48000
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self.audio_interp = audio_interp = 4
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2019-05-14 23:09:55 -04:00
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##################################################
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# Blocks
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##################################################
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self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + '' )
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self.rtlsdr_source_0.set_sample_rate(samp_rate)
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2019-06-02 10:46:00 -04:00
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self.rtlsdr_source_0.set_center_freq(freq, 0)
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2019-05-14 23:09:55 -04:00
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self.rtlsdr_source_0.set_freq_corr(0, 0)
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self.rtlsdr_source_0.set_dc_offset_mode(2, 0)
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self.rtlsdr_source_0.set_iq_balance_mode(2, 0)
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self.rtlsdr_source_0.set_gain_mode(True, 0)
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self.rtlsdr_source_0.set_gain(0, 0)
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self.rtlsdr_source_0.set_if_gain(0, 0)
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self.rtlsdr_source_0.set_bb_gain(0, 0)
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self.rtlsdr_source_0.set_antenna('', 0)
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self.rtlsdr_source_0.set_bandwidth(0, 0)
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2019-06-02 10:46:00 -04:00
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self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
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interpolation=audio_rate * audio_interp,
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decimation=int(samp_rate),
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taps=None,
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fractional_bw=None,
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)
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self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_float*1, 'raw_audio_pipe', False)
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self.blocks_file_sink_0.set_unbuffered(False)
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2019-05-14 23:09:55 -04:00
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self.analog_wfm_rcv_0 = analog.wfm_rcv(
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2019-06-02 10:46:00 -04:00
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quad_rate=audio_rate * audio_interp,
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audio_decimation=audio_interp,
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2019-05-14 23:09:55 -04:00
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)
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##################################################
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# Connections
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##################################################
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2019-06-02 10:46:00 -04:00
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self.connect((self.analog_wfm_rcv_0, 0), (self.blocks_file_sink_0, 0))
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self.connect((self.rational_resampler_xxx_0, 0), (self.analog_wfm_rcv_0, 0))
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self.connect((self.rtlsdr_source_0, 0), (self.rational_resampler_xxx_0, 0))
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2019-05-14 23:09:55 -04:00
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def get_samp_rate(self):
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return self.samp_rate
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def set_samp_rate(self, samp_rate):
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self.samp_rate = samp_rate
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self.rtlsdr_source_0.set_sample_rate(self.samp_rate)
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2019-06-02 10:46:00 -04:00
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def get_freq(self):
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return self.freq
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def set_freq(self, freq):
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self.freq = freq
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self.rtlsdr_source_0.set_center_freq(self.freq, 0)
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def get_audio_rate(self):
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return self.audio_rate
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2019-05-14 23:09:55 -04:00
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2019-06-02 10:46:00 -04:00
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def set_audio_rate(self, audio_rate):
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self.audio_rate = audio_rate
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def get_audio_interp(self):
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return self.audio_interp
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def set_audio_interp(self, audio_interp):
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self.audio_interp = audio_interp
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def is_valid_frequency(frequency):
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return frequency >= 87500000 and frequency <= 108000000
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def parse_commands(conn, tb, commands):
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quit = False
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for command in commands:
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if command == "":
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continue
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elif command[0] == '?': # Query Section
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if command[1:] == "VER":
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conn.sendall("Version 0.1\n")
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elif command[1:] == "FREQ":
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conn.sendall(str(tb.get_freq()) + '\n')
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else:
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print("UNKNOWN COMMAND: ", command)
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elif command[0] == ':': # Setter Section
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if command[1:5] == "FREQ":
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print("FREQUENCY SET")
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frequency = float(command[6:])
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if is_valid_frequency(frequency):
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tb.set_freq(frequency)
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else:
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print("ERROR: Invalid Frequency ", frequency)
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elif command[1:] == "QUIT":
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print("QUITTING")
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quit = True
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else:
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print("UNKNOWN COMMAND: ", command)
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else:
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print("UNKNOWN COMMAND", command)
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# Return state back to application
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return {'quit': quit}
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2019-05-14 23:09:55 -04:00
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def main(top_block_cls=top_block, options=None):
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tb = top_block_cls()
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tb.start()
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2019-06-02 10:46:00 -04:00
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2019-05-14 23:09:55 -04:00
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HOST = '127.0.0.1' # Loopback Address (Localhost)
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PORT = 65432 # Semi-Random Port that is non-priviledged (> 1023)
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# Avoid bind() exception: OSError: [Errno 48] Address already in use
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s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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s.bind((HOST, PORT))
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quit = False
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while not quit:
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s.listen(1) # Number of unaccepted connections before it rejects new ones
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conn, addr = s.accept()
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print("Connected by ", addr)
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while not quit:
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data = conn.recv(1024) # Not sure about the bytes argument...
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data = data.strip() # Removes \r\n
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print("DATA: ", data)
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commands = re.split(";", data)
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if data == "":
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break
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2019-06-02 10:46:00 -04:00
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state = parse_commands(conn, tb, commands)
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if state['quit']:
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quit = True
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2019-05-14 23:09:55 -04:00
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conn.close()
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s.close()
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if __name__ == '__main__':
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main()
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