/
GMSK_SendMOD.py
executable file
·132 lines (114 loc) · 3.95 KB
/
GMSK_SendMOD.py
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#!/usr/bin/env python2
##################################################
# GNU Radio Python Flow Graph
# Title: Gmsk Send
# Generated: Sat Apr 9 15:42:11 2016
##################################################
if __name__ == '__main__':
import ctypes
import sys
if sys.platform.startswith('linux'):
try:
x11 = ctypes.cdll.LoadLibrary('libX11.so')
x11.XInitThreads()
except:
print "Warning: failed to XInitThreads()"
from gnuradio import digital
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio import uhd
from gnuradio import zeromq
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from grc_gnuradio import blks2 as grc_blks2
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import time
import wx
###
from threading import Thread
import zmq
import struct
def sub(change_freq):
context = zmq.Context()
subscriber = context.socket(zmq.SUB)
subscriber.connect("tcp://127.0.0.1:5560")
subscriber.setsockopt(zmq.SUBSCRIBE,"")
msg = zmq.Message
while (True):
msg = subscriber.recv()
freqID = int(struct.unpack('<I',msg)[0])
print "\n" , "[Control Subscriber] Received request to change to frequency ID:", freqID
change_freq(freqID)
### End modifications ###
class GMSK_Send(grc_wxgui.top_block_gui):
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Gmsk Send")
_icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 200e3
##################################################
# Blocks
##################################################
self.zeromq_sub_source_0 = zeromq.sub_source(gr.sizeof_char, 1, "tcp://127.0.0.1:5558", 1000, False)
self.uhd_usrp_sink_0 = uhd.usrp_sink(
",".join(("", "")),
uhd.stream_args(
cpu_format="fc32",
channels=range(1),
),
)
self.uhd_usrp_sink_0.set_samp_rate(samp_rate)
self.uhd_usrp_sink_0.set_center_freq(102.3e6, 0)
self.uhd_usrp_sink_0.set_gain(75, 0)
self.uhd_usrp_sink_0.set_antenna("TX/RX", 0)
self.uhd_usrp_sink_0.set_bandwidth(200e3, 0)
self.digital_gmsk_mod_0 = digital.gmsk_mod(
samples_per_symbol=2,
bt=0.35,
verbose=False,
log=False,
)
self.blks2_packet_encoder_0 = grc_blks2.packet_mod_b(grc_blks2.packet_encoder(
samples_per_symbol=2,
bits_per_symbol=1,
preamble="",
access_code="",
pad_for_usrp=True,
),
payload_length=19,
)
##################################################
# Connections
##################################################
self.connect((self.blks2_packet_encoder_0, 0), (self.digital_gmsk_mod_0, 0))
self.connect((self.digital_gmsk_mod_0, 0), (self.uhd_usrp_sink_0, 0))
self.connect((self.zeromq_sub_source_0, 0), (self.blks2_packet_encoder_0, 0))
###
t = Thread(target=sub, args=(self.change_freq,))
t.start()
### End modifications ###
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.uhd_usrp_sink_0.set_samp_rate(self.samp_rate)
###
def change_freq(self, freqID):
if freqID == 1:
self.tx_freq = 102.3e6
elif freqID == 2:
self.tx_freq = 99.4e6
else:
self.tx_freq = 100e6
self.uhd_usrp_sink_0.set_center_freq(self.tx_freq, 0)
### End modifications ###
if __name__ == '__main__':
parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
(options, args) = parser.parse_args()
tb = GMSK_Send()
tb.Start(True)
tb.Wait()