def __init__(self):
gr.top_block.__init__(self)
#build graph now
#usrp_source
self.usrp = usrp.source_c()
adc_rate = self.usrp.adc_rate() #64MHz
hw_decim = 16 #so Sample rate into host is 4MHz
self.usrp.set_decim_rate(hw_decim)
self.subdev = usrp.selected_subdev(self.usrp,
usrp.pick_rx_subdevice(self.usrp))
self.usrp.set_mux(
usrp.determine_rx_mux_value(self.usrp,
usrp.pick_rx_subdevice(self.usrp)))
print "Using RX d'board %s" % (self.subdev.side_and_name(), )
self.subdev.set_gain(30)
rf_freq = 106800000 # 106.8MHz
self.set_freq(rf_freq)
print "Freq: ", rf_freq
self.subdev.select_rx_antenna("TX/RX")
#low pass filter
self.sample_rate = adc_rate / hw_decim
self.lpf_decim = 20 # so after channel filter, the sample rate is 200KHz
self.lp_filter = gr.fir_filter_ccf(
self.lpf_decim,
gr.firdes.low_pass(
1,
self.sample_rate,
100e3, # cut off freq
10e3, # transition band
gr.firdes.WIN_BLACKMAN, # Window function
6.76 # not used
))
# WBFM receiver
quad_rate = self.sample_rate #input rate of demodulator
max_dev = 75e3 #max deviation of FM Broadcast
fm_demod_gain = quad_rate / (2 * math.pi * max_dev)
self.fm_decoder = gr.quadrature_demod_cf(fm_demod_gain)
# Rational Resampler
self.audio_sample_rate = 96000
self.rational_resampler = blks2.rational_resampler_fff(
interpolation=int(self.audio_sample_rate / 1000),
decimation=int(self.sample_rate / self.lpf_decim / 1000),
taps=None,
fractional_bw=None,
)
self.audio_sink = audio.sink(int(self.audio_sample_rate), "", True)
#connections
self.connect(self.usrp, self.lp_filter, self.fm_decoder,
self.rational_resampler, self.audio_sink)
def __set_rx_from_usrp(self, subdev_spec, decimation_rate, gain, frequency, preserve):
from gnuradio import usrp
# setup USRP
self.usrp.set_decim_rate(decimation_rate)
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self.usrp)
self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, subdev_spec))
subdev = usrp.selected_subdev(self.usrp, subdev_spec)
capture_rate = self.usrp.adc_freq() / self.usrp.decim_rate()
self.info["capture-rate"] = capture_rate
if gain is None:
g = subdev.gain_range()
gain = float(g[0]+g[1])/2
subdev.set_gain(gain)
r = self.usrp.tune(0, subdev, frequency)
if not r:
raise RuntimeError("failed to set USRP frequency")
# capture file
if preserve:
try:
self.capture_filename = os.tmpnam()
except RuntimeWarning:
ignore = True
capture_file = gr.file_sink(gr.sizeof_gr_complex, self.capture_filename)
self.__connect([[self.usrp, capture_file]])
else:
self.capture_filename = None
# everything else
self.__build_graph(self.usrp, capture_rate)
def __init__(self, N, fs):
gr.hier_block2.__init__(self,
"usrp_source",
gr.io_signature(0,0,0),
gr.io_signature(1,1, gr.sizeof_gr_complex))
# Parameters.
frequency = 1575.6e6
decim_rate = int(64e6/fs)
fpga_filename = "std_4rx_0tx.rbf"
# Sources.
usrp = usrp.source_c( decim_rate=decim_rate, fpga_filename=fpga_filename )
head = gr.head( gr.sizeof_gr_complex, N*fs*1e-3 )
self.connect( usrp, head, self )
# USRP settings.
rx_subdev_spec = usrp.pick_rx_subdevice(usrp)
usrp.set_mux(usrp.determine_rx_mux_value(usrp, rx_subdev_spec))
subdev = usrp.selected_subdev( usrp, rx_subdev_spec )
print "Subdev gain range: "
print subdev.gain_range()
subdev.set_gain(70)
r = usrp.tune( 0,_subdev, frequency )
if not r:
sys.exit('Failed to set frequency')
def setup_usrp(freq, gain):
######## set up usrp
u = usrp.source_c(decim_rate=32) # 2M sampling freq
rx_subdev_spec = usrp.pick_rx_subdevice(u)
#print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
#print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
#print "rx_subdev_spec = ", options.rx_subdev_spec
mux=usrp.determine_rx_mux_value(u, rx_subdev_spec)
#print "mux = ", mux
u.set_mux(mux)
# determine the daughterboard subdevice we're using
subdev = usrp.selected_subdev(u, rx_subdev_spec)
#print "Using RX d'board %s" % (self.subdev.side_and_name(),)
input_rate = u.adc_freq() / u.decim_rate()
#print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
#print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
subdev.set_gain(gain)
r = u.tune(0, subdev, freq)
#print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
return u
def setup_usrp(freq, gain):
######## set up usrp
u = usrp.source_c(decim_rate=32) # 2M sampling freq
rx_subdev_spec = usrp.pick_rx_subdevice(u)
#print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
#print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
#print "rx_subdev_spec = ", options.rx_subdev_spec
mux = usrp.determine_rx_mux_value(u, rx_subdev_spec)
#print "mux = ", mux
u.set_mux(mux)
# determine the daughterboard subdevice we're using
subdev = usrp.selected_subdev(u, rx_subdev_spec)
#print "Using RX d'board %s" % (self.subdev.side_and_name(),)
input_rate = u.adc_freq() / u.decim_rate()
#print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
#print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
subdev.set_gain(gain)
r = u.tune(0, subdev, freq)
#print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
return u
def _setup_usrp_source(self):
self.rx_u = usrp.source_c (fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
adc_rate = self.rx_u.adc_rate()
self.rx_u.set_decim_rate(self._decim)
# determine the daughterboard subdevice we're using
if self._rx_subdev_spec is None:
print 'not set rx subdev'
self._rx_subdev_spec = usrp.pick_rx_subdevice(self.rx_u)
print self._rx_subdev_spec
self.rx_subdev = usrp.selected_subdev(self.rx_u, self._rx_subdev_spec)
gains = self.rx_subdev.gain_range()
self.rx_subdev.set_gain((gains[0]+gains[1])/2)
self.rx_u.set_mux(usrp.determine_rx_mux_value(self.rx_u, self._rx_subdev_spec))
print 'subdev size %d' % self.rx_subdev.which()
ok = self.rx_u.tune(0, self.rx_subdev, self._rx_freq)
if not ok:
print "Failed to set Rx frequency to %s" % (eng_notation.num_to_str(self._rx_freq),)
raise ValueError
self.rx_subdev.set_auto_tr(True)
def __set_rx_from_usrp(self, subdev_spec, decimation_rate, gain, frequency,
preserve):
from gnuradio import usrp
# setup USRP
self.usrp.set_decim_rate(decimation_rate)
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self.usrp)
self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, subdev_spec))
subdev = usrp.selected_subdev(self.usrp, subdev_spec)
capture_rate = self.usrp.adc_freq() / self.usrp.decim_rate()
self.info["capture-rate"] = capture_rate
if gain is None:
g = subdev.gain_range()
gain = float(g[0] + g[1]) / 2
subdev.set_gain(gain)
r = self.usrp.tune(0, subdev, frequency)
if not r:
raise RuntimeError("failed to set USRP frequency")
# capture file
if preserve:
try:
self.capture_filename = os.tmpnam()
except RuntimeWarning:
ignore = True
capture_file = gr.file_sink(gr.sizeof_gr_complex,
self.capture_filename)
self.__connect([[self.usrp, capture_file]])
else:
self.capture_filename = None
# everything else
self.__build_graph(self.usrp, capture_rate)
def _setup_usrp_source(self):
self.rx_u = usrp.source_c(fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
adc_rate = self.rx_u.adc_rate()
self.rx_u.set_decim_rate(self._decim)
# determine the daughterboard subdevice we're using
if self._rx_subdev_spec is None:
print 'not set rx subdev'
self._rx_subdev_spec = usrp.pick_rx_subdevice(self.rx_u)
print self._rx_subdev_spec
self.rx_subdev = usrp.selected_subdev(self.rx_u, self._rx_subdev_spec)
gains = self.rx_subdev.gain_range()
self.rx_subdev.set_gain((gains[0] + gains[1]) / 2)
self.rx_u.set_mux(
usrp.determine_rx_mux_value(self.rx_u, self._rx_subdev_spec))
print 'subdev size %d' % self.rx_subdev.which()
ok = self.rx_u.tune(0, self.rx_subdev, self._rx_freq)
if not ok:
print "Failed to set Rx frequency to %s" % (
eng_notation.num_to_str(self._rx_freq), )
raise ValueError
self.rx_subdev.set_auto_tr(True)
def _set_source(self):
options = self.options
fusb_block_size = gr.prefs().get_long('fusb', 'block_size', 4096)
fusb_nblocks = gr.prefs().get_long('fusb', 'nblocks', 16)
self.usrp = usrp.source_c(decim_rate=options.decim, fusb_block_size=fusb_block_size, fusb_nblocks=fusb_nblocks)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.usrp)
self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, options.rx_subdev_spec))
# determine the daughterboard subdevice
self.subdev = usrp.selected_subdev(self.usrp, options.rx_subdev_spec)
print "Using Rx d'board %s" % (self.subdev.side_and_name(),)
input_rate = self.usrp.adc_freq() / self.usrp.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
# set initial values
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
options.gain = float(g[0]+g[1])/2
r = self.usrp.tune(0, self.subdev, options.freq)
self.subdev.set_gain(options.gain)
return self.usrp
def __init__(self, N, fs):
gr.hier_block2.__init__(self, "usrp_source", gr.io_signature(0, 0, 0),
gr.io_signature(1, 1, gr.sizeof_gr_complex))
# Parameters.
frequency = 1575.6e6
decim_rate = int(64e6 / fs)
fpga_filename = "std_4rx_0tx.rbf"
# Sources.
usrp = usrp.source_c(decim_rate=decim_rate,
fpga_filename=fpga_filename)
head = gr.head(gr.sizeof_gr_complex, N * fs * 1e-3)
self.connect(usrp, head, self)
# USRP settings.
rx_subdev_spec = usrp.pick_rx_subdevice(usrp)
usrp.set_mux(usrp.determine_rx_mux_value(usrp, rx_subdev_spec))
subdev = usrp.selected_subdev(usrp, rx_subdev_spec)
print "Subdev gain range: "
print subdev.gain_range()
subdev.set_gain(70)
r = usrp.tune(0, _subdev, frequency)
if not r:
sys.exit('Failed to set frequency')
def _setup_usrp_source(self, options):
#create USRP
self._usrp = usrp.source_c(which= options.which, decim_rate = options.decim_rate)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self._usrp)
self._subdev = usrp.selected_subdev(self._usrp, options.rx_subdev_spec)
adc_rate = self._usrp.adc_rate()
mux = usrp.determine_rx_mux_value(self._usrp, options.rx_subdev_spec)
self._usrp.set_mux(mux)
tr = self._usrp.tune(0, self._subdev, options.freq)
if not (tr):
print "Failed to tune to center frequency!"
else:
print "Center frequency:", n2s(options.freq)
if options.gain is None:
g = self._subdev.gain_range();
options.gain = float(g[0]+g[1])/2.0
self._subdev.set_gain(options.gain)
#the bitrate option is initialised to value
self.rs_rate = options.rate
#Hard initialisation of bits per symbol
self.bits_per_symbol = 1
if options.verbose:
print "USRP source:", self._usrp
print "Decimation:", options.decim_rate
def _set_source(self):
options = self.options
fusb_block_size = gr.prefs().get_long('fusb', 'block_size', 4096)
fusb_nblocks = gr.prefs().get_long('fusb', 'nblocks', 16)
self.usrp = usrp.source_c(decim_rate=options.decim,
fusb_block_size=fusb_block_size,
fusb_nblocks=fusb_nblocks)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.usrp)
self.usrp.set_mux(
usrp.determine_rx_mux_value(self.usrp, options.rx_subdev_spec))
# determine the daughterboard subdevice
self.subdev = usrp.selected_subdev(self.usrp, options.rx_subdev_spec)
print "Using Rx d'board %s" % (self.subdev.side_and_name(), )
input_rate = self.usrp.adc_freq() / self.usrp.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
# set initial values
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
options.gain = float(g[0] + g[1]) / 2
r = self.usrp.tune(0, self.subdev, options.freq)
self.subdev.set_gain(options.gain)
return self.usrp
def main():
tb = gr.top_block()
ofdm_rx = howto.ofdm_rx();
#rs = gr.vector_source_c()
#rs = gr.file_source(gr.sizeof_gr_complex,'out.dat')
src = usrp.source_c(0)
#nchannel
src.set_nchannels(1)
sample_rate = 1e6
ulist = [src]
print "ulist"
print ulist
for u in ulist:
rdecim = int(u.adc_rate() / sample_rate)
u.set_decim_rate(rdecim)
sys.stderr.write("the decimate = %d\n"%(rdecim))
srx1 = usrp.pick_rx_subdevice(src)
print "srx1="
print srx1
subdev = ()
"""configure USRP mux and set rx/tx subdev """
ulist = [src]
assert len(ulist) == 1
src = ulist[0]
src.set_mux( usrp.determine_rx_mux_value(src, srx1))
subdev += (usrp.selected_subdev(src, srx1), )
for s in subdev: exec("if not hasattr(s, '_u'): s._u = src")
for s in subdev: s.set_auto_tr(True)
print "subdev"
print subdev
freq = 2400000000.0
for s in subdev:
r = usrp.tune(s._u, s.which(), s, freq)
if r:
sys.stderr.write("setting frequency of %s :\n"%(str(s)))
sys.stderr.write(" baseband frequency = %s \n" %(eng_notation.num_to_str(r.baseband_freq)))
sys.stderr.write(" DUC/DDC offset = %s\n" %(eng_notation.num_to_str(r.dxc_freq)))
elif not r:
sys.stderr.write("Unable to set frequency of %s to %g MHz \n"%(str(s), freq/ 1.0e6))
#g = 40.0
for s in subdev:
gain_range = s.gain_range()
#rx_gain = max(min(g, gain_range[1]), gain_range[0])
rx_gain = 0.3 * gain_range[1]
s.set_gain(rx_gain)
sys.stderr.write("the rx_gain = %d \n " %(rx_gain))
tb.connect(src, ofdm_rx)
print 'connect'
tb.run()
def __init__(self):
gr.top_block.__init__(self)
#build graph now
#usrp_source
self.usrp = usrp.source_c()
adc_rate = self.usrp.adc_rate() #64MHz
hw_decim = 16 #so Sample rate into host is 4MHz
self.usrp.set_decim_rate(hw_decim)
self.subdev = usrp.selected_subdev(self.usrp, usrp.pick_rx_subdevice(self.usrp))
self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, usrp.pick_rx_subdevice(self.usrp)))
print "Using RX d'board %s" % (self.subdev.side_and_name(),)
self.subdev.set_gain(30)
rf_freq = 106800000 # 106.8MHz
self.set_freq(rf_freq)
print "Freq: ", rf_freq
self.subdev.select_rx_antenna("TX/RX")
#low pass filter
self.sample_rate = adc_rate / hw_decim
self.lpf_decim = 20 # so after channel filter, the sample rate is 200KHz
self.lp_filter = gr.fir_filter_ccf( self.lpf_decim, gr.firdes.low_pass ( 1,
self.sample_rate,
100e3, # cut off freq
10e3, # transition band
gr.firdes.WIN_BLACKMAN, # Window function
6.76 # not used
))
# WBFM receiver
quad_rate = self.sample_rate #input rate of demodulator
max_dev = 75e3 #max deviation of FM Broadcast
fm_demod_gain = quad_rate/(2 * math.pi * max_dev)
self.fm_decoder = gr.quadrature_demod_cf (fm_demod_gain)
# Rational Resampler
self.audio_sample_rate = 96000
self.rational_resampler = blks2.rational_resampler_fff ( interpolation = int(self.audio_sample_rate/1000),
decimation = int(self.sample_rate/self.lpf_decim/1000),
taps = None,
fractional_bw = None,
)
self.audio_sink = audio.sink (int(self.audio_sample_rate), "", True)
#connections
self.connect ( self.usrp, self.lp_filter, self.fm_decoder, self.rational_resampler, self.audio_sink )
def __init__(self, options):
gr.top_block.__init__(self)
# Create a USRP source with GPIO FPGA build, then configure
u = usrp.source_s(decim_rate=options.decim,
fpga_filename=gpio.fpga_filename)
if options.force_complex_RXA:
# This is a dirty hack to force complex mode (receive both I and Q) on basicRX or LFRX
# This forces the receive board in RXA (side A) to be used
# FIXME: This has as a side effect that the gain for Q is not set. So only use with gain 0 (--gain 0)
options.rx_subdev_spec = (0, 0)
u.set_mux(0x10)
if not (0 == options.gain):
print "WARNING, you should set the gain to 0 with --gain 0 when using --force-complex-RXA"
print "The gain for Q will now still be zero while the gain for I is not"
#options.gain=0
else:
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(u)
u.set_mux(usrp.determine_rx_mux_value(u, options.rx_subdev_spec))
subdev = usrp.selected_subdev(u, options.rx_subdev_spec)
print "Using RX d'board %s" % (subdev.side_and_name(), )
input_rate = u.adc_freq() / u.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = subdev.gain_range()
options.gain = float(g[0] + g[1]) / 2
#TODO setting gain on basicRX only sets the I channel, use a second subdev to set gain of Q channel
#see gnuradio-examples/multi-antenna for possible solutions
subdev.set_gain(options.gain)
#TODO check if freq has same problem as gain when trying to use complex mode on basicRX
r = u.tune(0, subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
# Connect pipeline
src = u
if options.nsamples is not None:
head = gr.head(gr.sizeof_short, int(options.nsamples) * 2)
self.connect(u, head)
src = head
ana_strip = gr.and_const_ss(0xFFFE)
dig_strip = gr.and_const_ss(0x0001)
ana_sink = gr.file_sink(gr.sizeof_short, options.ana_filename)
dig_sink = gr.file_sink(gr.sizeof_short, options.dig_filename)
self.connect(src, ana_strip, ana_sink)
self.connect(src, dig_strip, dig_sink)
def __init__(self, options):
gr.top_block.__init__(self)
# Create a USRP source with GPIO FPGA build, then configure
u = usrp.source_s(decim_rate=options.decim,fpga_filename=gpio.fpga_filename)
if options.force_complex_RXA:
# This is a dirty hack to force complex mode (receive both I and Q) on basicRX or LFRX
# This forces the receive board in RXA (side A) to be used
# FIXME: This has as a side effect that the gain for Q is not set. So only use with gain 0 (--gain 0)
options.rx_subdev_spec=(0,0)
u.set_mux(0x10)
if not (0==options.gain):
print "WARNING, you should set the gain to 0 with --gain 0 when using --force-complex-RXA"
print "The gain for Q will now still be zero while the gain for I is not"
#options.gain=0
else:
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(u)
u.set_mux(usrp.determine_rx_mux_value(u, options.rx_subdev_spec))
subdev = usrp.selected_subdev(u, options.rx_subdev_spec)
print "Using RX d'board %s" % (subdev.side_and_name(),)
input_rate = u.adc_freq()/u.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = subdev.gain_range()
options.gain = float(g[0]+g[1])/2
#TODO setting gain on basicRX only sets the I channel, use a second subdev to set gain of Q channel
#see gnuradio-examples/multi-antenna for possible solutions
subdev.set_gain(options.gain)
#TODO check if freq has same problem as gain when trying to use complex mode on basicRX
r = u.tune(0, subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
# Connect pipeline
src = u
if options.nsamples is not None:
head = gr.head(gr.sizeof_short, int(options.nsamples)*2)
self.connect(u, head)
src = head
ana_strip = gpio.and_const_ss(0xFFFE)
dig_strip = gpio.and_const_ss(0x0001)
ana_sink = gr.file_sink(gr.sizeof_short, options.ana_filename)
dig_sink = gr.file_sink(gr.sizeof_short, options.dig_filename)
self.connect(src, ana_strip, ana_sink)
self.connect(src, dig_strip, dig_sink)
def _setup_usrp1(self):
self._u = usrp.source_c (self._which,
fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
# determine the daughterboard subdevice we're using
if self._subdev_spec is None:
self._subdev_spec = usrp.pick_rx_subdevice(self._u)
self._subdev = usrp.selected_subdev(self._u, self._subdev_spec)
self._u.set_mux(usrp.determine_rx_mux_value(self._u, self._subdev_spec))
self._dxc = 0
def _setup_usrp1(self):
self._u = usrp.source_c(self._which,
fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
# determine the daughterboard subdevice we're using
if self._subdev_spec is None:
self._subdev_spec = usrp.pick_rx_subdevice(self._u)
self._subdev = usrp.selected_subdev(self._u, self._subdev_spec)
self._u.set_mux(usrp.determine_rx_mux_value(self._u,
self._subdev_spec))
self._dxc = 0
def _setup_usrp(self):
self._u = usrp.source_c(fpga_filename='usrp_radar_mono.rbf')
if self._subdev_spec == None:
self._subdev_spec = usrp.pick_rx_subdevice(self._u)
self._u.set_mux(usrp.determine_rx_mux_value(self._u, self._subdev_spec))
self._subdev = usrp.selected_subdev(self._u, self._subdev_spec)
if self._verbose:
print "Using", self._subdev.side_and_name(), "for radar receiver."
print "Setting receiver gain to", self._gain
self.set_gain(self._gain)
self.tune(self._frequency)
def _setup_usrp_source(self):
self.u = usrp.source_c (fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
adc_rate = self.u.adc_rate()
self.u.set_decim_rate(self._decim)
# determine the daughterboard subdevice we're using
if self._rx_subdev_spec is None:
self._rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.subdev = usrp.selected_subdev(self.u, self._rx_subdev_spec)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, self._rx_subdev_spec))
def _setup_usrp(self):
self._u = usrp.source_c(fpga_filename='usrp_radar_mono.rbf')
if self._subdev_spec == None:
self._subdev_spec = usrp.pick_rx_subdevice(self._u)
self._u.set_mux(usrp.determine_rx_mux_value(self._u,
self._subdev_spec))
self._subdev = usrp.selected_subdev(self._u, self._subdev_spec)
if self._verbose:
print "Using", self._subdev.side_and_name(), "for radar receiver."
print "Setting receiver gain to", self._gain
self.set_gain(self._gain)
self.tune(self._frequency)
def _setup_usrp_source(self):
self.u = usrp.source_c (fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
adc_rate = self.u.adc_rate()
self.u.set_decim_rate(self._decim)
# determine the daughterboard subdevice we're using
if self._rx_subdev_spec is None:
self._rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.subdev = usrp.selected_subdev(self.u, self._rx_subdev_spec)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, self._rx_subdev_spec))
def __init__(self, options, queue):
gr.top_block.__init__(self, "usrp_flex_all")
if options.from_file is not None:
src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
if options.verbose:
print "Reading samples from file", options.from_file
else:
src = usrp.source_c()
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(src)
subdev = usrp.selected_subdev(src, options.rx_subdev_spec)
src.set_mux(
usrp.determine_rx_mux_value(src, options.rx_subdev_spec))
src.set_decim_rate(20)
result = usrp.tune(src, 0, subdev,
930.5125e6 + options.calibration)
if options.verbose:
print "Using", subdev.name(), " for receiving."
print "Tuned USRP to", 930.5125e6 + options.calibration
taps = gr.firdes.low_pass(1.0, 1.0, 1.0 / 128.0 * 0.4,
1.0 / 128.0 * 0.1, gr.firdes.WIN_HANN)
if options.verbose:
print "Channel filter has", len(taps), "taps"
bank = blks2.analysis_filterbank(128, taps)
self.connect(src, bank)
if options.log and options.from_file == None:
src_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
self.connect(src, src_sink)
for i in range(128):
if i < 64:
freq = 930.5e6 + i * 25e3
else:
freq = 928.9e6 + (i - 64) * 25e3
if (freq < 929.0e6 or freq > 932.0e6):
self.connect((bank, i), gr.null_sink(gr.sizeof_gr_complex))
else:
self.connect((bank, i),
pager.flex_demod(queue, freq, options.verbose,
options.log))
if options.log:
self.connect(
(bank, i),
gr.file_sink(gr.sizeof_gr_complex, 'chan_' + '%3.3f' %
(freq / 1e6) + '.dat'))
def __init__(self, options, queue):
gr.top_block.__init__(self, "usrp_flex_all")
if options.from_file is not None:
src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
if options.verbose:
print "Reading samples from file", options.from_file
else:
src = usrp.source_c()
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(src)
subdev = usrp.selected_subdev(src, options.rx_subdev_spec)
src.set_mux(usrp.determine_rx_mux_value(src, options.rx_subdev_spec))
src.set_decim_rate(20)
result = usrp.tune(src, 0, subdev, 930.5125e6+options.calibration)
if options.verbose:
print "Using", subdev.name(), " for receiving."
print "Tuned USRP to", 930.5125e6+options.calibration
taps = gr.firdes.low_pass(1.0,
1.0,
1.0/128.0*0.4,
1.0/128.0*0.1,
gr.firdes.WIN_HANN)
if options.verbose:
print "Channel filter has", len(taps), "taps"
bank = blks2.analysis_filterbank(128, taps)
self.connect(src, bank)
if options.log and options.from_file == None:
src_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
self.connect(src, src_sink)
for i in range(128):
if i < 64:
freq = 930.5e6+i*25e3
else:
freq = 928.9e6+(i-64)*25e3
if (freq < 929.0e6 or freq > 932.0e6):
self.connect((bank, i), gr.null_sink(gr.sizeof_gr_complex))
else:
self.connect((bank, i), pager.flex_demod(queue, freq, options.verbose, options.log))
if options.log:
self.connect((bank, i), gr.file_sink(gr.sizeof_gr_complex, 'chan_'+'%3.3f'%(freq/1e6)+'.dat'))
def _setup_usrp(self, which, decim, subdev_spec, freq, gain):
self._usrp = usrp.source_c(which=which, decim_rate=decim)
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self._usrp)
self._subdev = usrp.selected_subdev(self._usrp, subdev_spec)
mux = usrp.determine_rx_mux_value(self._usrp, subdev_spec)
self._usrp.set_mux(mux)
tr = self._usrp.tune(0, self._subdev, freq)
if not (tr):
print "Failed to tune to center frequency!"
else:
print "Center frequency:", n2s(freq)
if gain is None:
g = self._subdev.gain_range()
gain = float(g[0] + g[1]) / 2.0
self._subdev.set_gain(gain)
print "RX d'board:", self._subdev.side_and_name()
def _setup_usrp(self, which, decim, subdev_spec, freq, gain):
self._usrp = usrp.source_c(which=which, decim_rate=decim)
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self._usrp)
self._subdev = usrp.selected_subdev(self._usrp, subdev_spec)
mux = usrp.determine_rx_mux_value(self._usrp, subdev_spec)
self._usrp.set_mux(mux)
tr = self._usrp.tune(0, self._subdev, freq)
if not (tr):
print "Failed to tune to center frequency!"
else:
print "Center frequency:", n2s(freq)
if gain is None:
g = self._subdev.gain_range();
gain = float(g[0]+g[1])/2.0
self._subdev.set_gain(gain)
print "RX d'board:", self._subdev.side_and_name()
def setup_usrp(freq):
# Constants
interp = 128
decim = 64
# Make USRP instances to TX and RX
utx = usrp.sink_c(fpga_filename="local_rssi5.rbf")
urx = usrp.source_c(fpga_filename="local_rssi5.rbf")
# Set decim and interp rates
utx.set_interp_rate(interp)
urx.set_decim_rate(decim)
# Pick subdevice
subdev_spec_tx = usrp.pick_tx_subdevice(utx)
subdev_spec_rx = usrp.pick_rx_subdevice(urx)
# Set up mux
mux_tx = usrp.determine_tx_mux_value(utx, subdev_spec_tx)
mux_rx = usrp.determine_rx_mux_value(urx, subdev_spec_rx)
utx.set_mux(mux_tx)
urx.set_mux(mux_rx)
# pick d'board
subdev_tx = usrp.selected_subdev(utx, subdev_spec_tx)
subdev_rx = usrp.selected_subdev(urx, subdev_spec_rx)
print "Using TX d'board %s" %(subdev_tx.side_and_name())
print "Using RX d'board %s" %(subdev_rx.side_and_name())
# Gain
subdev_tx.set_gain((subdev_tx.gain_range()[0] + subdev_tx.gain_range()[1]) / 2)
subdev_rx.set_gain((subdev_rx.gain_range()[0] + subdev_rx.gain_range()[1]) / 2)
# Tune
if not utx.tune(subdev_tx._which, subdev_tx, freq):
DEBUG( "error tuning TX")
if not urx.tune(subdev_rx._which, subdev_rx, freq):
DEBUG( "error tuning RX")
# Power on
subdev_tx.set_enable(True)
subdev_rx.set_enable(True)
sys.stdout.flush()
return utx, urx
def _setup_usrp_source(self):
self.u = usrp.source_c (fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
adc_rate = self.u.adc_rate()
# derive values of bitrate, samples_per_symbol, and decim from desired info
(self._bitrate, self._samples_per_symbol, self._decim) = \
pick_rx_bitrate(self._bitrate, self._demod_class.bits_per_symbol(), \
self._samples_per_symbol, self._decim, adc_rate)
self.u.set_decim_rate(self._decim)
# determine the daughterboard subdevice we're using
if self._rx_subdev_spec is None:
self._rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.subdev = usrp.selected_subdev(self.u, self._rx_subdev_spec)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, self._rx_subdev_spec))
def _setup_usrp_source(self):
self.u = usrp.source_c(self._which,
fusb_block_size=self._fusb_block_size,
fusb_nblocks=self._fusb_nblocks)
adc_rate = self.u.adc_rate()
# derive values of bitrate, samples_per_symbol, and decim from desired info
(self._bitrate, self._samples_per_symbol, self._decim) = \
pick_rx_bitrate(self._bitrate, self._demod_class.bits_per_symbol(), \
self._samples_per_symbol, self._decim, adc_rate)
self.u.set_decim_rate(self._decim)
# determine the daughterboard subdevice we're using
if self._rx_subdev_spec is None:
self._rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.subdev = usrp.selected_subdev(self.u, self._rx_subdev_spec)
self.u.set_mux(
usrp.determine_rx_mux_value(self.u, self._rx_subdev_spec))
def __init__(self, subdev_spec, decim, gain=None, calibration=0.0):
gr.hier_block2.__init__(self, "usrp_src",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._decim = decim
self._src = usrp.source_c()
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self._src)
self._subdev = usrp.selected_subdev(self._src, subdev_spec)
self._src.set_mux(usrp.determine_rx_mux_value(self._src, subdev_spec))
self._src.set_decim_rate(self._decim)
# If no gain specified, set to midrange
if gain is None:
g = self._subdev.gain_range()
gain = (g[0]+g[1])/2.0
self._subdev.set_gain(gain)
self._cal = calibration
self.connect(self._src, self)
def set_subdev (self, spec=None):
""" assumes nchannels has been set """
""" call set_freq after subdev is set """
self.subdev = ()
if self.fake_rf: return # no subdev for fake rf
""" get subdev spec """
if spec is None:
srx1 = usrp.pick_rx_subdevice(self.src)
else:
srx1 = spec
""" configure USRP mux and set rx/tx subdev """
ulist = [self.src]
if self.nchannels == 1:
assert len(ulist) == 1, "[radiorx]: Invalid number of USRP boards!"
src = ulist[0]
src.set_mux (usrp.determine_rx_mux_value(src, srx1) )
self.subdev += (usrp.selected_subdev(src, srx1), )
for s in self.subdev: exec("if not hasattr(s, '_u'): s._u = src")
elif self.nchannels == 2:
assert len(ulist) == 1, "[radiorx]: Invalid number of USRP boards!"
srx2 = ((srx1[0]+1)%2, srx1[1])
src = ulist[0]
src.set_mux(gru.hexint(0x23012301) )
#src.set_mux(gru.hexint(0x32103210) )
self.subdev += (usrp.selected_subdev(src, srx1), )
self.subdev += (usrp.selected_subdev(src, srx2), )
for s in self.subdev: exec("if not hasattr(s, '_u'): s._u = src")
elif self.nchannels == 4:
assert len(ulist) == 2, "[radiorx]: Invalid number of USRP boards!"
srx2 = ((srx1[0]+1)%2, srx1[1])
for src in ulist:
src.set_mux(gru.hexint(0x23012301) )
self.subdev += (usrp.selected_subdev(src, srx1), )
self.subdev += (usrp.selected_subdev(src, srx2), )
for s in self.subdev: exec("if not hasattr(s, '_u'): s._u = src")
else:
return self.error("Unable to set subdev; invalid value for " \
+ "nchannels=%d"%(self.nchannels) )
self.set_auto_tr(True) # enable Automatic Tx/Rx Switching
def __init__(self, subdev_spec, decim, gain=None, calibration=0.0):
gr.hier_block2.__init__(
self,
"usrp_src",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._decim = decim
self._src = usrp.source_c()
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self._src)
self._subdev = usrp.selected_subdev(self._src, subdev_spec)
self._src.set_mux(usrp.determine_rx_mux_value(self._src, subdev_spec))
self._src.set_decim_rate(self._decim)
# If no gain specified, set to midrange
if gain is None:
g = self._subdev.gain_range()
gain = (g[0] + g[1]) / 2.0
self._subdev.set_gain(gain)
self._cal = calibration
self.connect(self._src, self)
def _setup_usrp_source(self):
self.u_src = usrp.source_c(which = self._usrp,
fusb_block_size = self._fusb_block_size,
fusb_nblocks = self._fusb_nblocks)
self.u_src.set_verbose(self._verbose)
self.u_src.set_decim_rate(int(self.u_src.converter_rate() / self._sample_rate))
# determine the daughterboard subdevice we're using
if self._rx_subdev_spec is None:
self._rx_subdev_spec = usrp.pick_rx_subdevice(self.u_src)
self.u_src.set_mux(usrp.determine_rx_mux_value(self.u_src, self._rx_subdev_spec))
self.rx_subdev = usrp.selected_subdev(self.u_src, self._rx_subdev_spec)
self.rx_subdev.set_auto_tr(False)
if self._rx_antenna != None:
self.rx_subdev.select_rx_antenna(self._rx_antenna)
gain = self._rx_gain
if gain is None:
gain = (self.rx_subdev.gain_range()[0] + self.rx_subdev.gain_range()[1]) / 2
self.rx_subdev.set_gain(gain)
def __init__(self):
gr.top_block.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option("-m", "--dab-mode", type="int", default=1,
help="DAB mode [default=%default]")
parser.add_option("-f", "--freq", type="eng_float", default=206352000,
help="Carrier frequency [default=%default]")
parser.add_option("-g", "--gain", type="eng_float", default=8,
help="USRP gain (dB) [default=%default]")
parser.add_option("-n", "--config", type="string", default="channel.conf",
help="DAB+ channel configuration file [default=%default]")
(options, args) = parser.parse_args ()
if len(args)>0:
parser.print_help()
raise SystemExit, 1
self.conf=options.config
######## set up usrp
self.u = usrp.source_c(decim_rate=32) # 2M sampling freq
rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
#print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
#print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
#print "rx_subdev_spec = ", options.rx_subdev_spec
mux=usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
#print "mux = ", mux
self.u.set_mux(mux)
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
#print "Using RX d'board %s" % (self.subdev.side_and_name(),)
input_rate = self.u.adc_freq() / self.u.decim_rate()
#print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
#print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
#print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
mode=options.dab_mode
param = dabp.parameters(mode)
# null symbol detector
samples_per_null_sym=param.get_Nnull()
#print "samples per null symbol : %d" % samples_per_null_sym
nulldet = dabp.detect_null(samples_per_null_sym)
# ofdm demod
demod = dabp.ofdm_demod(mode)
# FIC/MSC demultiplexer
demux = dabp.fic_msc_demux(0, mode)
# depuncturer
punc = dabp.depuncturer_fic(mode)
I=punc.getI()
# viterbi
vit = dabp.vitdec(I)
# descrambler
scram = dabp.scrambler(I)
# FIB sink
self.dst = dabp.fib_sink()
nullsink = gr.null_sink(gr.sizeof_char)
# connect everything
self.connect(self.u, nulldet)
self.connect(self.u, (demod,0))
self.connect(nulldet, (demod,1))
self.connect((demod,0), demux, punc, vit, scram, self.dst)
self.connect((demod,1), nullsink)
def __init__(self):
gr.top_block.__init__(self)
usage="%prog: [options] output_filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
help="select USRP Rx side A or B (default=A)")
parser.add_option("-d", "--decim", type="int", default=16,
help="set fgpa decimation rate to DECIM [default=%default]")
parser.add_option("-f", "--freq", type="eng_float", default=None,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-8", "--width-8", action="store_true", default=False,
help="Enable 8-bit samples across USB")
parser.add_option( "--no-hb", action="store_true", default=False,
help="don't use halfband filter in usrp")
parser.add_option( "-s","--output-shorts", action="store_true", default=False,
help="output interleaved shorts in stead of complex floats")
parser.add_option("-N", "--nsamples", type="eng_float", default=None,
help="number of samples to collect [default=+inf]")
(options, args) = parser.parse_args ()
if len(args) != 1:
parser.print_help()
raise SystemExit, 1
filename = args[0]
if options.freq is None:
parser.print_help()
sys.stderr.write('You must specify the frequency with -f FREQ\n');
raise SystemExit, 1
# build the graph
if options.no_hb or (options.decim<8):
self.fpga_filename="std_4rx_0tx.rbf" #Min decimation of this firmware is 4. contains 4 Rx paths without halfbands and 0 tx paths.
if options.output_shorts:
self.u = usrp.source_s(decim_rate=options.decim,fpga_filename=self.fpga_filename)
else:
self.u = usrp.source_c(decim_rate=options.decim,fpga_filename=self.fpga_filename)
else:
#standard fpga firmware "std_2rxhb_2tx.rbf" contains 2 Rx paths with halfband filters and 2 tx paths (the default) min decimation 8
if options.output_shorts:
self.u = usrp.source_s(decim_rate=options.decim)
else:
self.u = usrp.source_c(decim_rate=options.decim)
if options.width_8:
sample_width = 8
sample_shift = 8
format = self.u.make_format(sample_width, sample_shift)
r = self.u.set_format(format)
if options.output_shorts:
self.dst = gr.file_sink(gr.sizeof_short, filename)
else:
self.dst = gr.file_sink(gr.sizeof_gr_complex, filename)
if options.nsamples is None:
self.connect(self.u, self.dst)
else:
if options.output_shorts:
self.head = gr.head(gr.sizeof_short, int(options.nsamples)*2)
else:
self.head = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
self.connect(self.u, self.head, self.dst)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
print "Using RX d'board %s" % (self.subdev.side_and_name(),)
input_rate = self.u.adc_freq() / self.u.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
options.gain = float(g[0]+g[1])/2
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
def __init__(self, subdev_spec, gain, audio_output):
gr.hier_block2.__init__(
self,
"receive_path",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self.u = usrp.source_c()
adc_rate = self.u.adc_rate()
self.if_rate = 256e3 # 256 kS/s
usrp_decim = int(adc_rate // self.if_rate)
if_decim = 4
self.u.set_decim_rate(usrp_decim)
self.quad_rate = self.if_rate // if_decim # 64 kS/s
audio_decim = 2
self.audio_rate = self.quad_rate // audio_decim # 32 kS/s
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self.u)
self.subdev = usrp.selected_subdev(self.u, subdev_spec)
print "Using RX d'board %s" % (self.subdev.side_and_name(), )
self.u.set_mux(usrp.determine_rx_mux_value(self.u, subdev_spec))
# Create filter to get actual channel we want
chan_coeffs = gr.firdes.low_pass(
1.0, # gain
self.if_rate, # sampling rate
8e3, # low pass cutoff freq
2e3, # width of trans. band
gr.firdes.WIN_HANN) # filter type
print "len(rx_chan_coeffs) =", len(chan_coeffs)
# Decimating Channel filter with frequency translation
# complex in and out, float taps
self.ddc = gr.freq_xlating_fir_filter_ccf(
if_decim, # decimation rate
chan_coeffs, # taps
0, # frequency translation amount
self.if_rate) # input sample rate
if USE_SIMPLE_SQUELCH:
self.squelch = gr.simple_squelch_cc(20)
else:
self.squelch = blks2.standard_squelch(self.audio_rate)
# instantiate the guts of the single channel receiver
self.fmrx = blks2.nbfm_rx(self.audio_rate, self.quad_rate)
# audio gain / mute block
self._audio_gain = gr.multiply_const_ff(1.0)
# sound card as final sink
audio_sink = audio.sink(int(self.audio_rate), audio_output)
# now wire it all together
if USE_SIMPLE_SQUELCH:
self.connect(self.u, self.ddc, self.squelch, self.fmrx,
self._audio_gain, audio_sink)
else:
self.connect(self.u, self.ddc, self.fmrx, self.squelch,
self._audio_gain, audio_sink)
if gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
gain = float(g[0] + g[1]) / 2
self.set_gain(gain)
v = self.volume_range()
self.set_volume((v[0] + v[1]) / 2)
s = self.squelch_range()
self.set_squelch((s[0] + s[1]) / 2)
def __init__(self, subdev_spec, center_freq, offset_freq, decim, squelch, gain):
gr.top_block.__init__(self)
# configure USRP
u = usrp.source_c()
u.set_decim_rate(decim)
capture_rate = u.adc_freq() / u.decim_rate()
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(u)
subdev = usrp.selected_subdev(u, subdev_spec)
u.set_mux(usrp.determine_rx_mux_value(u, subdev_spec))
print "Using RX d'board %s" % (subdev.side_and_name(),)
if gain is None:
g = subdev.gain_range()
gain = float(g[0] + g[1]) / 2
subdev.set_gain(gain)
u.tune(0, subdev, center_freq)
# setup receiver attributes
channel_rate = 125000
symbol_rate = 4800
# channel filter
self.channel_offset = offset_freq
channel_decim = capture_rate // channel_rate
channel_rate = capture_rate // channel_decim
trans_width = 12.5e3 / 2;
trans_centre = trans_width + (trans_width / 2)
coeffs = gr.firdes.low_pass(1.0, capture_rate, trans_centre, trans_width, gr.firdes.WIN_HANN)
self.channel_filter = gr.freq_xlating_fir_filter_ccf(channel_decim, coeffs, self.channel_offset, capture_rate)
self.connect(u, self.channel_filter)
# power squelch
power_squelch = gr.pwr_squelch_cc(squelch, 1e-3, 0, True)
self.connect(self.channel_filter, power_squelch)
# FM demodulator
self.symbol_deviation = 600.0
fm_demod_gain = channel_rate / (2.0 * pi * self.symbol_deviation)
fm_demod = gr.quadrature_demod_cf(fm_demod_gain)
self.connect(power_squelch, fm_demod)
# symbol filter
symbol_decim = 1
samples_per_symbol = channel_rate // symbol_rate
symbol_coeffs = (1.0/samples_per_symbol,) * samples_per_symbol
symbol_filter = gr.fir_filter_fff(symbol_decim, symbol_coeffs)
self.connect(fm_demod, symbol_filter)
# C4FM demodulator
autotuneq = gr.msg_queue(2)
self.demod_watcher = demod_watcher(autotuneq, self.adjust_channel_offset)
demod_fsk4 = op25.fsk4_demod_ff(autotuneq, channel_rate, symbol_rate)
self.connect(symbol_filter, demod_fsk4)
# symbol slicer
levels = [ -2.0, 0.0, 2.0, 4.0 ]
slicer = op25.fsk4_slicer_fb(levels)
self.connect(demod_fsk4, slicer)
# frame decoder
decoder = op25.decoder_bf()
self.connect(slicer, decoder)
# try to connect audio output device
try:
audio_sink = audio.sink(8000, "plughw:0,0", True)
self.connect(decoder, audio_sink)
except Exception:
sink = gr.null_sink(gr.sizeof_float)
self.connect(decoder, sink)
def __init__(self, options, queue):
gr.top_block.__init__(self, "usrp_flex")
self.options = options
self.offset = 0.0
self.adj_time = time.time()
self.verbose = options.verbose
if options.from_file is None:
# Set up USRP source with specified RX daughterboard
self.src = usrp.source_c()
if options.rx_subdev_spec == None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.src)
self.subdev = usrp.selected_subdev(self.src,
options.rx_subdev_spec)
self.src.set_mux(
usrp.determine_rx_mux_value(self.src, options.rx_subdev_spec))
# Grab 250 KHz of spectrum (sample rate becomes 250 ksps complex)
self.src.set_decim_rate(256)
# If no gain specified, set to midrange
if options.gain is None:
g = self.subdev.gain_range()
options.gain = (g[0] + g[1]) / 2.0
self.subdev.set_gain(options.gain)
# Tune daughterboard
actual_frequency = options.frequency + options.calibration
tune_result = usrp.tune(self.src, 0, self.subdev, actual_frequency)
if not tune_result:
sys.stderr.write("Failed to set center frequency to " +
` actual_frequency ` + "\n")
sys.exit(1)
if options.verbose:
print "Using RX daughterboard", self.subdev.side_and_name()
print "USRP gain is", options.gain
print "USRP tuned to", actual_frequency
else:
# Use supplied file as source of samples
self.src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
if options.verbose:
print "Reading samples from", options.from_file
if options.log and not options.from_file:
usrp_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
self.connect(self.src, usrp_sink)
# Set up 22KHz-wide bandpass about center frequency. Decimate by 10
# to get channel rate of 25Ksps
taps = optfir.low_pass(
1.0, # Filter gain
250e3, # Sample rate
11000, # One-sided modulation bandwidth
12500, # One-sided channel bandwidth
0.1, # Passband ripple
60) # Stopband attenuation
if options.verbose:
print "Channel filter has", len(taps), "taps."
self.chan = gr.freq_xlating_fir_filter_ccf(
10, # Decimation rate
taps, # Filter taps
0.0, # Offset frequency
250e3) # Sample rate
if options.log:
chan_sink = gr.file_sink(gr.sizeof_gr_complex, 'chan.dat')
self.connect(self.chan, chan_sink)
# FLEX protocol demodulator
self.flex = pager.flex_demod(queue, options.frequency, options.verbose,
options.log)
self.connect(self.src, self.chan, self.flex)
def main():
parser = OptionParser(option_class=eng_option)
parser.add_option("-R",
"--rx-subdev-spec",
type="subdev",
default=None,
help="select USRP Rx side A or B (default=A)")
parser.add_option("-f",
"--freq",
type="eng_float",
default=144.800e6,
help="set frequency to FREQ",
metavar="FREQ")
parser.add_option("-g",
"--gain",
type="eng_float",
default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-d",
"--do-logging",
action="store_true",
default=False,
help="enable logging on datafiles")
parser.add_option("-s",
"--use-datafile",
action="store_true",
default=False,
help="use usrp.dat (256kbps) as input")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
markfreq = 2200
spacefreq = 1200
bitrate = 1200
usrp_decim = 250
if_rate = 64e6 / usrp_decim #256e3
sf = (if_rate * 3) / 5 #153600
bit_oversampling = 8
sw_decim = int(sf / bitrate / bit_oversampling) #8
bf = sf / sw_decim
symdev = abs(markfreq - spacefreq) / 2
symcf = min(markfreq, spacefreq) + symdev
nbfmdev = 3e3
nbfmk = if_rate / (2 * pi * nbfmdev)
symk = bf / (2 * pi * symdev)
fg = gr.flow_graph()
if options.do_logging:
logger1 = gr.file_sink(gr.sizeof_gr_complex, "usrpout.dat")
logger2 = gr.file_sink(gr.sizeof_float, "demod.dat")
logger3 = gr.file_sink(gr.sizeof_float, "clkrec.dat")
logger4 = gr.file_sink(gr.sizeof_char, "slicer.dat")
if options.use_datafile:
src = gr.file_source(gr.sizeof_gr_complex, "usrp.dat")
else:
u = usrp.source_c()
u.set_decim_rate(usrp_decim)
if options.rx_subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(u)
else:
subdev_spec = options.rx_subdev_spec
subdev = usrp.selected_subdev(u, subdev_spec)
print "Using RX d'board %s" % (subdev.side_and_name(), )
u.set_mux(usrp.determine_rx_mux_value(u, subdev_spec))
print "MUX:%x" % (usrp.determine_rx_mux_value(u, subdev_spec))
if options.gain is None:
g = subdev.gain_range()
gain = float(g[0] + g[1]) / 2
else:
gain = options.gain
subdev.set_gain(gain)
print "Gain set to", str(gain)
r = usrp.tune(u, 0, subdev, options.freq)
if r:
print "Frequency set to", options.freq
else:
print "Frequency set to", options.freq, "failed"
src = u
chan_taps = gr.firdes.low_pass(1, if_rate, 13e3, 4e3, gr.firdes.WIN_HANN)
chan = gr.fir_filter_ccf(1, chan_taps) #256e3
dee = blks.fm_deemph(fg, if_rate, 75e-6)
fmdem = gr.quadrature_demod_cf(nbfmk)
res_taps = blks.design_filter(3, 5, 0.4)
res = blks.rational_resampler_fff(fg, 3, 5, res_taps) #153600
lo = gr.sig_source_c(sf, gr.GR_SIN_WAVE, -symcf, 1)
mix = gr.multiply_cc()
r2c = gr.float_to_complex()
lp_taps = gr.firdes.low_pass(sw_decim, sf, 600, 2e3, gr.firdes.WIN_HANN)
lp = gr.fir_filter_ccf(sw_decim, lp_taps)
dem = gr.quadrature_demod_cf(symk)
alpha = 0.0001
freqoff = gr.single_pole_iir_filter_ff(alpha)
sub = gr.sub_ff()
_def_gain_mu = 0.05
_def_mu = 0.5
_def_freq_error = 0.00
_def_omega_relative_limit = 0.005
_omega = bit_oversampling * (1 + _def_freq_error)
_gain_omega = .25 * _def_gain_mu * _def_gain_mu
clkrec = gr.clock_recovery_mm_ff(_omega, _gain_omega, _def_mu,
_def_gain_mu, _def_omega_relative_limit)
slicer = gr.binary_slicer_fb()
pktq = gr.msg_queue()
sink = packetradio.hdlc_framer(pktq, 0)
watcher = queue_watcher_thread(pktq, rx_callback)
fg.connect(src, chan, fmdem, dee, res, r2c, (mix, 0))
fg.connect(lo, (mix, 1))
fg.connect(mix, lp, dem)
fg.connect(dem, (sub, 0))
fg.connect(dem, freqoff, (sub, 1))
fg.connect(sub, clkrec, slicer)
fg.connect(slicer, sink)
if options.do_logging:
fg.connect(src, logger1)
fg.connect(sub, logger2)
fg.connect(clkrec, logger3)
fg.connect(slicer, logger4)
fg.start()
fg.wait()
def __init__(self, subdev_spec, center_freq, offset_freq, decim, squelch,
gain):
gr.top_block.__init__(self)
# configure USRP
u = usrp.source_c()
u.set_decim_rate(decim)
capture_rate = u.adc_freq() / u.decim_rate()
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(u)
subdev = usrp.selected_subdev(u, subdev_spec)
u.set_mux(usrp.determine_rx_mux_value(u, subdev_spec))
print "Using RX d'board %s" % (subdev.side_and_name(), )
if gain is None:
g = subdev.gain_range()
gain = float(g[0] + g[1]) / 2
subdev.set_gain(gain)
u.tune(0, subdev, center_freq)
# setup receiver attributes
channel_rate = 125000
symbol_rate = 4800
# channel filter
self.channel_offset = offset_freq
channel_decim = capture_rate // channel_rate
channel_rate = capture_rate // channel_decim
trans_width = 12.5e3 / 2
trans_centre = trans_width + (trans_width / 2)
coeffs = gr.firdes.low_pass(1.0, capture_rate, trans_centre,
trans_width, gr.firdes.WIN_HANN)
self.channel_filter = gr.freq_xlating_fir_filter_ccf(
channel_decim, coeffs, self.channel_offset, capture_rate)
self.connect(u, self.channel_filter)
# power squelch
power_squelch = gr.pwr_squelch_cc(squelch, 1e-3, 0, True)
self.connect(self.channel_filter, power_squelch)
# FM demodulator
self.symbol_deviation = 600.0
fm_demod_gain = channel_rate / (2.0 * pi * self.symbol_deviation)
fm_demod = gr.quadrature_demod_cf(fm_demod_gain)
self.connect(power_squelch, fm_demod)
# symbol filter
symbol_decim = 1
samples_per_symbol = channel_rate // symbol_rate
symbol_coeffs = (1.0 / samples_per_symbol, ) * samples_per_symbol
symbol_filter = gr.fir_filter_fff(symbol_decim, symbol_coeffs)
self.connect(fm_demod, symbol_filter)
# C4FM demodulator
autotuneq = gr.msg_queue(2)
self.demod_watcher = demod_watcher(autotuneq,
self.adjust_channel_offset)
demod_fsk4 = op25.fsk4_demod_ff(autotuneq, channel_rate, symbol_rate)
self.connect(symbol_filter, demod_fsk4)
# symbol slicer
levels = [-2.0, 0.0, 2.0, 4.0]
slicer = op25.fsk4_slicer_fb(levels)
self.connect(demod_fsk4, slicer)
# frame decoder
decoder = op25.decoder_bf()
self.connect(slicer, decoder)
# try to connect audio output device
try:
audio_sink = audio.sink(8000, "plughw:0,0", True)
self.connect(decoder, audio_sink)
except Exception:
sink = gr.null_sink(gr.sizeof_float)
self.connect(decoder, sink)
def __init__(self, options, queue):
gr.top_block.__init__(self, "usrp_flex")
self.options = options
self.offset = 0.0
self.adj_time = time.time()
self.verbose = options.verbose
if options.from_file is None:
# Set up USRP source with specified RX daughterboard
self.src = usrp.source_c()
if options.rx_subdev_spec == None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.src)
self.subdev = usrp.selected_subdev(self.src, options.rx_subdev_spec)
self.src.set_mux(usrp.determine_rx_mux_value(self.src, options.rx_subdev_spec))
# Grab 250 KHz of spectrum (sample rate becomes 250 ksps complex)
self.src.set_decim_rate(256)
# If no gain specified, set to midrange
if options.gain is None:
g = self.subdev.gain_range()
options.gain = (g[0]+g[1])/2.0
self.subdev.set_gain(options.gain)
# Tune daughterboard
actual_frequency = options.frequency+options.calibration
tune_result = usrp.tune(self.src, 0, self.subdev, actual_frequency)
if not tune_result:
sys.stderr.write("Failed to set center frequency to "+`actual_frequency`+"\n")
sys.exit(1)
if options.verbose:
print "Using RX daughterboard", self.subdev.side_and_name()
print "USRP gain is", options.gain
print "USRP tuned to", actual_frequency
else:
# Use supplied file as source of samples
self.src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
if options.verbose:
print "Reading samples from", options.from_file
if options.log and not options.from_file:
usrp_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
self.connect(self.src, usrp_sink)
# Set up 22KHz-wide bandpass about center frequency. Decimate by 10
# to get channel rate of 25Ksps
taps = optfir.low_pass(1.0, # Filter gain
250e3, # Sample rate
11000, # One-sided modulation bandwidth
12500, # One-sided channel bandwidth
0.1, # Passband ripple
60) # Stopband attenuation
if options.verbose:
print "Channel filter has", len(taps), "taps."
self.chan = gr.freq_xlating_fir_filter_ccf(10, # Decimation rate
taps, # Filter taps
0.0, # Offset frequency
250e3) # Sample rate
if options.log:
chan_sink = gr.file_sink(gr.sizeof_gr_complex, 'chan.dat')
self.connect(self.chan, chan_sink)
# FLEX protocol demodulator
self.flex = pager.flex_demod(queue, options.frequency, options.verbose, options.log)
self.connect(self.src, self.chan, self.flex)
def __init__(self):
gr.top_block.__init__(self)
usage="%prog: [options] output_filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
help="select USRP Rx side A or B (default=A)")
parser.add_option("-d", "--decim", type="int", default=128,
help="set selfpa decimation rate to DECIM [default=%default]")
parser.add_option("-f", "--freq", type="eng_float", default=0.0,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-n", "--nchan", type="intx", default=2,
help="set nchannels to NCHAN")
parser.add_option("-N", "--nsamples", type="eng_float", default=None,
help="number of samples to collect [default=+inf]")
parser.add_option ("-o", "--output-file-m", default="usrp_rx_m.dat",
help="write master data to FILE", metavar="FILE")
parser.add_option ("--output-file-m2", default="usrp_rx_m2.dat",
help="write master data from second channel to FILE", metavar="FILE")
parser.add_option ("-p", "--output-file-s", default="usrp_rx_s.dat",
help="write slave data to FILE", metavar="FILE")
parser.add_option ("--output-file-s2", default="usrp_rx_s2.dat",
help="write slave data from second channel to FILE", metavar="FILE")
parser.add_option("-x", "--master-serialno", type="string", default=None,
help="Serial_no of the usrp which should be the MASTER (default= select any)")
(options, args) = parser.parse_args ()
if len(args) != 0:
parser.print_help()
raise SystemExit, 1
if options.freq is None:
parser.print_help()
sys.stderr.write('You must specify the frequency with -f FREQ\n');
raise SystemExit, 1
# build the graph
self.multi=usrp_multi.multi_source_align( fg=self, master_serialno=options.master_serialno, decim=options.decim,
nchan=options.nchan )
self.um=self.multi.get_master_usrp()
self.us=self.multi.get_slave_usrp()
dst_m=gr.file_sink (gr.sizeof_gr_complex, options.output_file_m)
dst_s=gr.file_sink (gr.sizeof_gr_complex, options.output_file_s)
if options.nsamples is None:
self.connect((self.multi.get_master_source_c(),1),dst_m)
self.connect((self.multi.get_slave_source_c(),1),dst_s)
else:
head_m = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
head_s = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
self.connect((self.multi.get_master_source_c(),1),head_m,dst_m)
self.connect((self.multi.get_slave_source_c(),1),head_s,dst_s)
if(4==options.nchan):
dst_m2=gr.file_sink (gr.sizeof_gr_complex, options.output_file_m2)
dst_s2=gr.file_sink (gr.sizeof_gr_complex, options.output_file_s2)
if options.nsamples is None:
self.connect((self.multi.get_master_source_c(),2),dst_m2)
self.connect((self.multi.get_slave_source_c(),2),dst_s2)
else:
head_m2 = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
head_s2 = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
self.connect((self.multi.get_master_source_c(),2),head_m2,dst_m2)
self.connect((self.multi.get_slave_source_c(),2),head_s2,dst_s2)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.um)
if (options.nchan!=4):
mux=usrp.determine_rx_mux_value(self.um, options.rx_subdev_spec)
mux= (mux<<8 & 0xffffffff) | (mux & 0xff)
self.um.set_mux(mux)
self.us.set_mux(mux)
# determine the daughterboard subdevice we're using
self.subdevm = usrp.selected_subdev(self.um, options.rx_subdev_spec)
self.subdevs = usrp.selected_subdev(self.us, options.rx_subdev_spec)
print "Using MASTER RX d'board %s" % (self.subdevm.side_and_name(),)
print "Using SLAVE RX d'board %s" % (self.subdevs.side_and_name(),)
input_rate = self.um.adc_freq() / self.um.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdevm.gain_range()
options.gain = float(g[0]+g[1])/2
self.multi.set_gain_all_rx(options.gain)
result,r1,r2,r3,r4 = self.multi.tune_all_rx(options.freq)
if not result:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
def __init__(self):
gr.top_block.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option("-m", "--dab-mode", type="int", default=1,
help="DAB mode [default=%default]")
parser.add_option("-f", "--freq", type="eng_float", default=206352000,
help="Carrier frequency [default=%default]")
parser.add_option("-g", "--gain", type="eng_float", default=8,
help="USRP gain (dB) [default=%default]")
parser.add_option("-i", "--subchid", type="int", default=-1,
help="Subchannel ID")
parser.add_option("-n", "--config", type="string", default="channel3.conf",
help="DAB+ channel configuration file [default=%default]")
parser.add_option("-o", "--output", type="string", default="-",
help="Output AAC file [default=%default]")
parser.add_option("-p", "--mplayer", action="store_true", default=False,
help="Play the program by MPlayer [default=%default, stdout]")
(options, args) = parser.parse_args ()
if len(args)>0:
parser.print_help()
raise SystemExit, 1
######## set up usrp
self.u = usrp.source_c(decim_rate=32) # 2M sampling freq
rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
#print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
#print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
#print "rx_subdev_spec = ", options.rx_subdev_spec
mux=usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
#print "mux = ", mux
self.u.set_mux(mux)
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
#print "Using RX d'board %s" % (self.subdev.side_and_name(),)
input_rate = self.u.adc_freq() / self.u.decim_rate()
#print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
#print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
#print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
# channel configuration
cc = dabp.channel_conf(options.config)
sys.stderr.write("Playing Channel: "+cc.get_label(options.subchid)+"\n")
start_addr = cc.get_start_addr(options.subchid)
subchsz = cc.get_subchsz(options.subchid)
optprot = cc.get_optprot(options.subchid)
#print "start_addr=%d, subchsz=%d, optprot=%d" % (start_addr, subchsz, optprot)
mode=options.dab_mode
param = dabp.parameters(mode)
# null symbol detector
samples_per_null_sym=param.get_Nnull()
#print "samples per null symbol : %d" % samples_per_null_sym
nulldet = dabp.detect_null(samples_per_null_sym)
# ofdm demod
demod = dabp.ofdm_demod(mode)
# FIC/MSC demultiplexer
demux = dabp.fic_msc_demux(1, mode)
cifsz = param.get_cifsz()
scs = dabp.subchannel_selector(cifsz,start_addr,subchsz)
intlv = dabp.time_deinterleaver(subchsz)
punc = dabp.depuncturer(subchsz,optprot)
I = punc.getI()
vit = dabp.vitdec(I)
scram = dabp.scrambler(I)
len_logfrm=scram.get_nbytes()
sync = dabp.super_frame_sync(len_logfrm)
subchidx = sync.get_subchidx()
rs = dabp.super_frame_rsdec(subchidx)
if options.mplayer:
mplayer = subprocess.Popen(['mplayer', '-ac', 'faad', '-rawaudio', 'format=0xff', '-demuxer', 'rawaudio','-'], stdin=subprocess.PIPE)
dst = dabp.super_frame_sink(subchidx, mplayer.stdin.fileno())
else:
dst = dabp.super_frame_sink(subchidx, options.output)
nullsink = gr.null_sink(gr.sizeof_char)
# connect everything
self.connect(self.u, nulldet)
self.connect(self.u, (demod,0))
self.connect(nulldet, (demod,1))
self.connect((demod,0), demux, scs, intlv, punc, vit, scram, sync, rs, dst)
self.connect((demod,1), nullsink)
def __init__(self):
gr.top_block.__init__(self)
usage = "%prog: [options] output_filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-R",
"--rx-subdev-spec",
type="subdev",
default=(0, 0),
help="select USRP Rx side A or B (default=A)")
parser.add_option(
"-d",
"--decim",
type="int",
default=16,
help="set fgpa decimation rate to DECIM [default=%default]")
parser.add_option("-f",
"--freq",
type="eng_float",
default=None,
help="set frequency to FREQ",
metavar="FREQ")
parser.add_option("-g",
"--gain",
type="eng_float",
default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-8",
"--width-8",
action="store_true",
default=False,
help="Enable 8-bit samples across USB")
parser.add_option("--no-hb",
action="store_true",
default=False,
help="don't use halfband filter in usrp")
parser.add_option(
"-s",
"--output-shorts",
action="store_true",
default=False,
help="output interleaved shorts in stead of complex floats")
parser.add_option("-N",
"--nsamples",
type="eng_float",
default=None,
help="number of samples to collect [default=+inf]")
(options, args) = parser.parse_args()
if len(args) != 1:
parser.print_help()
raise SystemExit, 1
filename = args[0]
if options.freq is None:
parser.print_help()
sys.stderr.write('You must specify the frequency with -f FREQ\n')
raise SystemExit, 1
# build the graph
if options.no_hb or (options.decim < 8):
self.fpga_filename = "std_4rx_0tx.rbf" #Min decimation of this firmware is 4. contains 4 Rx paths without halfbands and 0 tx paths.
if options.output_shorts:
self.u = usrp.source_s(decim_rate=options.decim,
fpga_filename=self.fpga_filename)
else:
self.u = usrp.source_c(decim_rate=options.decim,
fpga_filename=self.fpga_filename)
else:
#standard fpga firmware "std_2rxhb_2tx.rbf" contains 2 Rx paths with halfband filters and 2 tx paths (the default) min decimation 8
if options.output_shorts:
self.u = usrp.source_s(decim_rate=options.decim)
else:
self.u = usrp.source_c(decim_rate=options.decim)
if options.width_8:
sample_width = 8
sample_shift = 8
format = self.u.make_format(sample_width, sample_shift)
r = self.u.set_format(format)
if options.output_shorts:
self.dst = gr.file_sink(gr.sizeof_short, filename)
else:
self.dst = gr.file_sink(gr.sizeof_gr_complex, filename)
if options.nsamples is None:
self.connect(self.u, self.dst)
else:
if options.output_shorts:
self.head = gr.head(gr.sizeof_short, int(options.nsamples) * 2)
else:
self.head = gr.head(gr.sizeof_gr_complex,
int(options.nsamples))
self.connect(self.u, self.head, self.dst)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.u.set_mux(
usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
print "Using RX d'board %s" % (self.subdev.side_and_name(), )
input_rate = self.u.adc_freq() / self.u.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
options.gain = float(g[0] + g[1]) / 2
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
def __init__(self):
gr.top_block.__init__(self)
usage="%prog: [options] output_filename. \n Special output_filename \"sdl\" will use video_sink_sdl as realtime output window. " \
"You then need to have gr-video-sdl installed. \n" \
"Make sure your input capture file containes interleaved shorts not complex floats"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
help="select USRP Rx side A or B (default=A)")
parser.add_option("-c", "--contrast", type="eng_float", default=1.0,
help="set contrast (default is 1.0)")
parser.add_option("-b", "--brightness", type="eng_float", default=0.0,
help="set brightness (default is 0)")
parser.add_option("-d", "--decim", type="int", default=8,
help="set fgpa decimation rate to DECIM [default=%default]")
parser.add_option("-i", "--in-filename", type="string", default=None,
help="Use input file as source. samples must be interleaved shorts \n " +
"Use usrp_rx_file.py or usrp_rx_cfile.py --output-shorts. \n"
"Special name \"usrp\" results in realtime capturing and processing using usrp. \n" +
"You then probably need a decimation factor of 64 or higher.")
parser.add_option("-f", "--freq", type="eng_float", default=None,
help="set frequency to FREQ.\nNote that the frequency of the video carrier is not at the middle of the TV channel", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-p", "--pal", action="store_true", default=False,
help="PAL video format (this is the default)")
parser.add_option("-n", "--ntsc", action="store_true", default=False,
help="NTSC video format")
parser.add_option("-r", "--repeat", action="store_false", default=True,
help="repeat in_file in a loop")
parser.add_option("-8", "--width-8", action="store_true", default=False,
help="Enable 8-bit samples across USB")
parser.add_option("-N", "--nframes", type="eng_float", default=None,
help="number of frames to collect [default=+inf]")
parser.add_option( "--no-hb", action="store_true", default=False,
help="don't use halfband filter in usrp")
(options, args) = parser.parse_args ()
if not (len(args) == 1):
parser.print_help()
sys.stderr.write('You must specify the output. FILENAME or sdl \n');
sys.exit(1)
filename = args[0]
if options.in_filename is None:
parser.print_help()
sys.stderr.write('You must specify the input -i FILENAME or -i usrp\n');
raise SystemExit, 1
if not (filename=="sdl"):
options.repeat=False
if not (options.in_filename=="usrp"):
self.filesource = gr.file_source(gr.sizeof_short,options.in_filename,options.repeat) # file is data source, capture with usr_rx_csfile.py
self.istoc = gr.interleaved_short_to_complex()
self.connect(self.filesource,self.istoc)
self.adc_rate=64e6
self.src=self.istoc
else:
if options.freq is None:
parser.print_help()
sys.stderr.write('You must specify the frequency with -f FREQ\n');
raise SystemExit, 1
if abs(options.freq) < 1e6:
options.freq *= 1e6
if options.no_hb or (options.decim<8):
self.fpga_filename="std_4rx_0tx.rbf" #contains 4 Rx paths without halfbands and 0 tx paths
else:
self.fpga_filename="std_2rxhb_2tx.rbf" # contains 2 Rx paths with halfband filters and 2 tx paths (the default)
# build the graph
self.u = usrp.source_c(decim_rate=options.decim,fpga_filename=self.fpga_filename)
self.src=self.u
if options.width_8:
sample_width = 8
sample_shift = 8
format = self.u.make_format(sample_width, sample_shift)
r = self.u.set_format(format)
self.adc_rate=self.u.adc_freq()
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
print "Using RX d'board %s" % (self.subdev.side_and_name(),)
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
options.gain = float(g[0]+g[1])/2
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
input_rate = self.adc_rate / options.decim
print "video sample rate %s" % (eng_notation.num_to_str(input_rate))
self.agc=gr.agc_cc(1e-7,1.0,1.0) #1e-7
self.am_demod = gr.complex_to_mag ()
self.set_blacklevel=gr.add_const_ff(options.brightness +255.0)
self.invert_and_scale = gr.multiply_const_ff (-options.contrast *128.0*255.0/(200.0))
self.f2uc=gr.float_to_uchar()
# sdl window as final sink
if not (options.pal or options.ntsc):
options.pal=True #set default to PAL
if options.pal:
lines_per_frame=625.0
frames_per_sec=25.0
show_width=768
elif options.ntsc:
lines_per_frame=525.0
frames_per_sec=29.97002997
show_width=640
width=int(input_rate/(lines_per_frame*frames_per_sec))
height=int(lines_per_frame)
if filename=="sdl":
#Here comes the tv screen, you have to build and install gr-video-sdl for this (subproject of gnuradio, only in cvs for now)
try:
video_sink = video_sdl.sink_uc ( frames_per_sec, width, height,0,show_width,height)
except:
print "gr-video-sdl is not installed"
print "realtime \"sdl\" video output window is not available"
raise SystemExit, 1
self.dst=video_sink
else:
print "You can use the imagemagick display tool to show the resulting imagesequence"
print "use the following line to show the demodulated TV-signal:"
print "display -depth 8 -size " +str(width)+ "x" + str(height) + " gray:" +filename
print "(Use the spacebar to advance to next frames)"
file_sink=gr.file_sink(gr.sizeof_char, filename)
self.dst =file_sink
if options.nframes is None:
self.connect(self.src, self.agc)
else:
self.head = gr.head(gr.sizeof_gr_complex, int(options.nframes*width*height))
self.connect(self.src, self.head, self.agc)
self.connect (self.agc,self.am_demod,self.invert_and_scale, self.set_blacklevel,self.f2uc,self.dst)
def __init__(self):
gr.top_block.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option("-m",
"--dab-mode",
type="int",
default=1,
help="DAB mode [default=%default]")
parser.add_option("-f",
"--freq",
type="eng_float",
default=206352000,
help="Carrier frequency [default=%default]")
parser.add_option("-g",
"--gain",
type="eng_float",
default=8,
help="USRP gain (dB) [default=%default]")
parser.add_option(
"-n",
"--config",
type="string",
default="channel.conf",
help="DAB+ channel configuration file [default=%default]")
(options, args) = parser.parse_args()
if len(args) > 0:
parser.print_help()
raise SystemExit, 1
self.conf = options.config
######## set up usrp
self.u = usrp.source_c(decim_rate=32) # 2M sampling freq
rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
#print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
#print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
#print "rx_subdev_spec = ", options.rx_subdev_spec
mux = usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
#print "mux = ", mux
self.u.set_mux(mux)
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
#print "Using RX d'board %s" % (self.subdev.side_and_name(),)
input_rate = self.u.adc_freq() / self.u.decim_rate()
#print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
#print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
#print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
mode = options.dab_mode
param = dabp.parameters(mode)
# null symbol detector
samples_per_null_sym = param.get_Nnull()
#print "samples per null symbol : %d" % samples_per_null_sym
nulldet = dabp.detect_null(samples_per_null_sym)
# ofdm demod
demod = dabp.ofdm_demod(mode)
# FIC/MSC demultiplexer
demux = dabp.fic_msc_demux(0, mode)
# depuncturer
punc = dabp.depuncturer_fic(mode)
I = punc.getI()
# viterbi
vit = dabp.vitdec(I)
# descrambler
scram = dabp.scrambler(I)
# FIB sink
self.dst = dabp.fib_sink()
nullsink = gr.null_sink(gr.sizeof_char)
# connect everything
self.connect(self.u, nulldet)
self.connect(self.u, (demod, 0))
self.connect(nulldet, (demod, 1))
self.connect((demod, 0), demux, punc, vit, scram, self.dst)
self.connect((demod, 1), nullsink)
def __init__(self):
gr.flow_graph.__init__(self)
usage="%prog: [options] output_filename"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
help="select USRP Rx side A or B (default=A)")
parser.add_option("-d", "--decim", type="int", default=128,
help="set selfpa decimation rate to DECIM [default=%default]")
parser.add_option("-f", "--freq", type="eng_float", default=0.0,
help="set frequency to FREQ", metavar="FREQ")
parser.add_option("-g", "--gain", type="eng_float", default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-n", "--nchan", type="intx", default=2,
help="set nchannels to NCHAN")
parser.add_option("-N", "--nsamples", type="eng_float", default=None,
help="number of samples to collect [default=+inf]")
parser.add_option ("-o", "--output-file-m", default="usrp_rx_m.dat",
help="write master data to FILE", metavar="FILE")
parser.add_option ("--output-file-m2", default="usrp_rx_m2.dat",
help="write master data from second channel to FILE", metavar="FILE")
parser.add_option ("-p", "--output-file-s", default="usrp_rx_s.dat",
help="write slave data to FILE", metavar="FILE")
parser.add_option ("--output-file-s2", default="usrp_rx_s2.dat",
help="write slave data from second channel to FILE", metavar="FILE")
parser.add_option("-x", "--master-serialno", type="string", default=None,
help="Serial_no of the usrp which should be the MASTER (default= select any)")
(options, args) = parser.parse_args ()
if len(args) != 0:
parser.print_help()
raise SystemExit, 1
if options.freq is None:
parser.print_help()
sys.stderr.write('You must specify the frequency with -f FREQ\n');
raise SystemExit, 1
# build the graph
self.multi=usrp_multi.multi_source_align( fg=self, master_serialno=options.master_serialno, decim=options.decim,
nchan=options.nchan )
self.um=self.multi.get_master_usrp()
self.us=self.multi.get_slave_usrp()
dst_m=gr.file_sink (gr.sizeof_gr_complex, options.output_file_m)
dst_s=gr.file_sink (gr.sizeof_gr_complex, options.output_file_s)
if options.nsamples is None:
self.connect((self.multi.get_master_source_c(),1),dst_m)
self.connect((self.multi.get_slave_source_c(),1),dst_s)
else:
head_m = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
head_s = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
self.connect((self.multi.get_master_source_c(),1),head_m,dst_m)
self.connect((self.multi.get_slave_source_c(),1),head_s,dst_s)
if(4==options.nchan):
dst_m2=gr.file_sink (gr.sizeof_gr_complex, options.output_file_m2)
dst_s2=gr.file_sink (gr.sizeof_gr_complex, options.output_file_s2)
if options.nsamples is None:
self.connect((self.multi.get_master_source_c(),2),dst_m2)
self.connect((self.multi.get_slave_source_c(),2),dst_s2)
else:
head_m2 = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
head_s2 = gr.head(gr.sizeof_gr_complex, int(options.nsamples))
self.connect((self.multi.get_master_source_c(),2),head_m2,dst_m2)
self.connect((self.multi.get_slave_source_c(),2),head_s2,dst_s2)
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.um)
if (options.nchan!=4):
mux=usrp.determine_rx_mux_value(self.um, options.rx_subdev_spec)
mux= (mux<<8 & 0xffffffff) | (mux & 0xff)
self.um.set_mux(mux)
self.us.set_mux(mux)
# determine the daughterboard subdevice we're using
self.subdevm = usrp.selected_subdev(self.um, options.rx_subdev_spec)
self.subdevs = usrp.selected_subdev(self.us, options.rx_subdev_spec)
print "Using MASTER RX d'board %s" % (self.subdevm.side_and_name(),)
print "Using SLAVE RX d'board %s" % (self.subdevs.side_and_name(),)
input_rate = self.um.adc_freq() / self.um.decim_rate()
print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdevm.gain_range()
options.gain = float(g[0]+g[1])/2
self.multi.set_gain_all_rx(options.gain)
result,r1,r2,r3,r4 = self.multi.tune_all_rx(options.freq)
if not result:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
def __init__(self, options, queue):
gr.top_block.__init__(self, "usrp_flex")
self.options = options
self.offset = 0.0
self.file_offset = 0.0
self.adj_time = time.time()
self.verbose = options.verbose
if options.from_file is None:
# Set up USRP source with specified RX daughterboard
self.src = usrp.source_c()
if options.rx_subdev_spec == None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.src)
self.subdev = usrp.selected_subdev(self.src,
options.rx_subdev_spec)
self.src.set_mux(
usrp.determine_rx_mux_value(self.src, options.rx_subdev_spec))
# set FPGA decimation rate
self.src.set_decim_rate(options.decim)
# If no gain specified, set to midrange
if options.gain is None:
g = self.subdev.gain_range()
options.gain = (g[0] + g[1]) / 2.0
self.subdev.set_gain(options.gain)
# Tune daughterboard
actual_frequency = options.frequency + options.calibration
tune_result = usrp.tune(self.src, 0, self.subdev, actual_frequency)
if not tune_result:
sys.stderr.write("Failed to set center frequency to " +
` actual_frequency ` + "\n")
sys.exit(1)
if options.verbose:
print "Using RX daughterboard", self.subdev.side_and_name()
print "USRP gain is", options.gain
print "USRP tuned to", actual_frequency
else:
# Use supplied file as source of samples
self.file_offset = options.calibration
print "File input offset", self.offset
self.src = gr.file_source(gr.sizeof_gr_complex, options.from_file)
if options.verbose:
print "Reading samples from", options.from_file
if options.log and not options.from_file:
usrp_sink = gr.file_sink(gr.sizeof_gr_complex, 'usrp.dat')
self.connect(self.src, usrp_sink)
# following is rig to allow fast and easy swapping of signal configuration
# blocks between this example and the oscope example which uses self.msgq
self.msgq = queue
#-------------------------------------------------------------------------------
if options.protocol == 0:
# ---------- RD-LAP 19.2 kbps (9600 ksps), 25kHz channel,
self.symbol_rate = 9600 # symbol rate; at 2 bits/symbol this corresponds to 19.2kbps
self.channel_decimation = 10 # decimation (final rate should be at least several symbol rate)
self.max_frequency_offset = 12000.0 # coarse carrier tracker leash, ~ half a channel either way
self.symbol_deviation = 1200.0 # this is frequency offset from center of channel to +1 / -1 symbols
self.input_sample_rate = 64e6 / options.decim # for USRP: 64MHz / FPGA decimation rate
self.protocol_processing = fsk4.rdlap_f(
self.msgq,
0) # desired protocol processing block selected here
self.channel_rate = self.input_sample_rate / self.channel_decimation
# channel selection filter characteristics
channel_taps = optfir.low_pass(
1.0, # Filter gain
self.input_sample_rate, # Sample rate
10000, # One-sided modulation bandwidth
12000, # One-sided channel bandwidth
0.1, # Passband ripple
60) # Stopband attenuation
# symbol shaping filter characteristics
symbol_coeffs = gr.firdes.root_raised_cosine(
1.0, # gain
self.channel_rate, # sampling rate
self.symbol_rate, # symbol rate
0.2, # width of trans. band
500) # filter type
if options.protocol == 1:
# ---------- APCO-25 C4FM Test Data
self.symbol_rate = 4800 # symbol rate; at 2 bits/symbol this corresponds to 19.2kbps
self.channel_decimation = 20 # decimation
self.max_frequency_offset = 6000.0 # coarse carrier tracker leash
self.symbol_deviation = 600.0 # this is frequency offset from center of channel to +1 / -1 symbols
self.input_sample_rate = 64e6 / options.decim # for USRP: 64MHz / FPGA decimation rate
self.protocol_processing = fsk4.apco25_f(self.msgq, 0)
self.channel_rate = self.input_sample_rate / self.channel_decimation
# channel selection filter
channel_taps = optfir.low_pass(
1.0, # Filter gain
self.input_sample_rate, # Sample rate
5000, # One-sided modulation bandwidth
6500, # One-sided channel bandwidth
0.1, # Passband ripple
60) # Stopband attenuation
# symbol shaping filter
symbol_coeffs = gr.firdes.root_raised_cosine(
1.0, # gain
self.channel_rate, # sampling rate
self.symbol_rate, # symbol rate
0.2, # width of trans. band
500) # filter type
# ---------- End of configuration
if options.verbose:
print "Channel filter has", len(channel_taps), "taps."
self.chan = gr.freq_xlating_fir_filter_ccf(
self.channel_decimation, # Decimation rate
channel_taps, # Filter taps
0.0, # Offset frequency
self.input_sample_rate) # Sample rate
# also note:
# this specifies the nominal frequency deviation for the 4-level fsk signal
self.fm_demod_gain = self.channel_rate / (2.0 * pi *
self.symbol_deviation)
self.fm_demod = gr.quadrature_demod_cf(self.fm_demod_gain)
symbol_decim = 1
self.symbol_filter = gr.fir_filter_fff(symbol_decim, symbol_coeffs)
# eventually specify: sample rate, symbol rate
self.demod_fsk4 = fsk4.demod_ff(self.msgq, self.channel_rate,
self.symbol_rate)
if options.log:
chan_sink = gr.file_sink(gr.sizeof_gr_complex, 'chan.dat')
self.connect(self.chan, chan_sink)
if options.log:
chan_sink2 = gr.file_sink(gr.sizeof_float, 'demod.dat')
self.connect(self.demod_fsk4, chan_sink2)
self.connect(self.src, self.chan, self.fm_demod, self.symbol_filter,
self.demod_fsk4, self.protocol_processing)
def __init__(self):
gr.top_block.__init__(self)
usage="%prog: [options] output_filename. \n Special output_filename \"sdl\" will use video_sink_sdl as realtime output window. " \
"You then need to have gr-video-sdl installed. \n" \
"Make sure your input capture file containes interleaved shorts not complex floats"
parser = OptionParser(option_class=eng_option, usage=usage)
parser.add_option("-R",
"--rx-subdev-spec",
type="subdev",
default=(0, 0),
help="select USRP Rx side A or B (default=A)")
parser.add_option("-c",
"--contrast",
type="eng_float",
default=1.0,
help="set contrast (default is 1.0)")
parser.add_option("-b",
"--brightness",
type="eng_float",
default=0.0,
help="set brightness (default is 0)")
parser.add_option(
"-d",
"--decim",
type="int",
default=8,
help="set fgpa decimation rate to DECIM [default=%default]")
parser.add_option(
"-i",
"--in-filename",
type="string",
default=None,
help=
"Use input file as source. samples must be interleaved shorts \n "
+ "Use usrp_rx_file.py or usrp_rx_cfile.py --output-shorts. \n"
"Special name \"usrp\" results in realtime capturing and processing using usrp. \n"
+ "You then probably need a decimation factor of 64 or higher.")
parser.add_option(
"-f",
"--freq",
type="eng_float",
default=None,
help=
"set frequency to FREQ.\nNote that the frequency of the video carrier is not at the middle of the TV channel",
metavar="FREQ")
parser.add_option("-g",
"--gain",
type="eng_float",
default=None,
help="set gain in dB (default is midpoint)")
parser.add_option("-p",
"--pal",
action="store_true",
default=False,
help="PAL video format (this is the default)")
parser.add_option("-n",
"--ntsc",
action="store_true",
default=False,
help="NTSC video format")
parser.add_option("-r",
"--repeat",
action="store_false",
default=True,
help="repeat in_file in a loop")
parser.add_option("-8",
"--width-8",
action="store_true",
default=False,
help="Enable 8-bit samples across USB")
parser.add_option("-N",
"--nframes",
type="eng_float",
default=None,
help="number of frames to collect [default=+inf]")
parser.add_option("--no-hb",
action="store_true",
default=False,
help="don't use halfband filter in usrp")
(options, args) = parser.parse_args()
if not (len(args) == 1):
parser.print_help()
sys.stderr.write('You must specify the output. FILENAME or sdl \n')
sys.exit(1)
filename = args[0]
if options.in_filename is None:
parser.print_help()
sys.stderr.write(
'You must specify the input -i FILENAME or -i usrp\n')
raise SystemExit, 1
if not (filename == "sdl"):
options.repeat = False
if not (options.in_filename == "usrp"):
self.filesource = gr.file_source(
gr.sizeof_short, options.in_filename, options.repeat
) # file is data source, capture with usr_rx_csfile.py
self.istoc = gr.interleaved_short_to_complex()
self.connect(self.filesource, self.istoc)
self.adc_rate = 64e6
self.src = self.istoc
else:
if options.freq is None:
parser.print_help()
sys.stderr.write(
'You must specify the frequency with -f FREQ\n')
raise SystemExit, 1
if abs(options.freq) < 1e6:
options.freq *= 1e6
if options.no_hb or (options.decim < 8):
self.fpga_filename = "std_4rx_0tx.rbf" #contains 4 Rx paths without halfbands and 0 tx paths
else:
self.fpga_filename = "std_2rxhb_2tx.rbf" # contains 2 Rx paths with halfband filters and 2 tx paths (the default)
# build the graph
self.u = usrp.source_c(decim_rate=options.decim,
fpga_filename=self.fpga_filename)
self.src = self.u
if options.width_8:
sample_width = 8
sample_shift = 8
format = self.u.make_format(sample_width, sample_shift)
r = self.u.set_format(format)
self.adc_rate = self.u.adc_freq()
if options.rx_subdev_spec is None:
options.rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
self.u.set_mux(
usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
print "Using RX d'board %s" % (self.subdev.side_and_name(), )
if options.gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
options.gain = float(g[0] + g[1]) / 2
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
input_rate = self.adc_rate / options.decim
print "video sample rate %s" % (eng_notation.num_to_str(input_rate))
self.agc = gr.agc_cc(1e-7, 1.0, 1.0) #1e-7
self.am_demod = gr.complex_to_mag()
self.set_blacklevel = gr.add_const_ff(options.brightness + 255.0)
self.invert_and_scale = gr.multiply_const_ff(-options.contrast *
128.0 * 255.0 / (200.0))
self.f2uc = gr.float_to_uchar()
# sdl window as final sink
if not (options.pal or options.ntsc):
options.pal = True #set default to PAL
if options.pal:
lines_per_frame = 625.0
frames_per_sec = 25.0
show_width = 768
elif options.ntsc:
lines_per_frame = 525.0
frames_per_sec = 29.97002997
show_width = 640
width = int(input_rate / (lines_per_frame * frames_per_sec))
height = int(lines_per_frame)
if filename == "sdl":
#Here comes the tv screen, you have to build and install gr-video-sdl for this (subproject of gnuradio, only in cvs for now)
try:
video_sink = video_sdl.sink_uc(frames_per_sec, width, height,
0, show_width, height)
except:
print "gr-video-sdl is not installed"
print "realtime \"sdl\" video output window is not available"
raise SystemExit, 1
self.dst = video_sink
else:
print "You can use the imagemagick display tool to show the resulting imagesequence"
print "use the following line to show the demodulated TV-signal:"
print "display -depth 8 -size " + str(width) + "x" + str(
height) + " gray:" + filename
print "(Use the spacebar to advance to next frames)"
file_sink = gr.file_sink(gr.sizeof_char, filename)
self.dst = file_sink
if options.nframes is None:
self.connect(self.src, self.agc)
else:
self.head = gr.head(gr.sizeof_gr_complex,
int(options.nframes * width * height))
self.connect(self.src, self.head, self.agc)
self.connect(self.agc, self.am_demod, self.invert_and_scale,
self.set_blacklevel, self.f2uc, self.dst)
def __init__(self, subdev_spec, gain, audio_output):
gr.hier_block2.__init__(self, "receive_path",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(0, 0, 0)) # Output signature
self.u = usrp.source_c ()
adc_rate = self.u.adc_rate()
self.if_rate = 256e3 # 256 kS/s
usrp_decim = int(adc_rate // self.if_rate)
if_decim = 4
self.u.set_decim_rate(usrp_decim)
self.quad_rate = self.if_rate // if_decim # 64 kS/s
audio_decim = 2
audio_rate = self.quad_rate // audio_decim # 32 kS/s
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self.u)
self.subdev = usrp.selected_subdev(self.u, subdev_spec)
print "RX using", self.subdev.name()
self.u.set_mux(usrp.determine_rx_mux_value(self.u, subdev_spec))
# Create filter to get actual channel we want
chan_coeffs = gr.firdes.low_pass (1.0, # gain
self.if_rate, # sampling rate
13e3, # low pass cutoff freq
4e3, # width of trans. band
gr.firdes.WIN_HANN) # filter type
print "len(rx_chan_coeffs) =", len(chan_coeffs)
# Decimating Channel filter with frequency translation
# complex in and out, float taps
self.ddc = gr.freq_xlating_fir_filter_ccf(if_decim, # decimation rate
chan_coeffs, # taps
0, # frequency translation amount
self.if_rate) # input sample rate
# instantiate the guts of the single channel receiver
self.fmrx = blks2.nbfm_rx(audio_rate, self.quad_rate)
# standard squelch block
self.squelch = blks2.standard_squelch(audio_rate)
# audio gain / mute block
self._audio_gain = gr.multiply_const_ff(1.0)
# sound card as final sink
audio_sink = audio.sink (int(audio_rate), audio_output)
# now wire it all together
self.connect (self.u, self.ddc, self.fmrx, self.squelch, self._audio_gain, audio_sink)
if gain is None:
# if no gain was specified, use the mid-point in dB
g = self.subdev.gain_range()
gain = float(g[0]+g[1])/2
self.enabled = True
self.set_gain(gain)
v = self.volume_range()
self.set_volume((v[0]+v[1])/2)
s = self.squelch_range()
self.set_squelch((s[0]+s[1])/2)
def __init__(self):
gr.top_block.__init__(self)
parser = OptionParser(option_class=eng_option)
parser.add_option("-m",
"--dab-mode",
type="int",
default=1,
help="DAB mode [default=%default]")
parser.add_option("-f",
"--freq",
type="eng_float",
default=206352000,
help="Carrier frequency [default=%default]")
parser.add_option("-g",
"--gain",
type="eng_float",
default=8,
help="USRP gain (dB) [default=%default]")
parser.add_option("-i",
"--subchid",
type="int",
default=-1,
help="Subchannel ID")
parser.add_option(
"-n",
"--config",
type="string",
default="channel3.conf",
help="DAB+ channel configuration file [default=%default]")
parser.add_option("-o",
"--output",
type="string",
default="-",
help="Output AAC file [default=%default]")
parser.add_option(
"-p",
"--mplayer",
action="store_true",
default=False,
help="Play the program by MPlayer [default=%default, stdout]")
(options, args) = parser.parse_args()
if len(args) > 0:
parser.print_help()
raise SystemExit, 1
######## set up usrp
self.u = usrp.source_c(decim_rate=32) # 2M sampling freq
rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
#print "u.db(0,0).dbid() = ", self.u.db(0,0).dbid()
#print "u.db(1,0).dbid() = ", self.u.db(1,0).dbid()
#print "rx_subdev_spec = ", options.rx_subdev_spec
mux = usrp.determine_rx_mux_value(self.u, rx_subdev_spec)
#print "mux = ", mux
self.u.set_mux(mux)
# determine the daughterboard subdevice we're using
self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
#print "Using RX d'board %s" % (self.subdev.side_and_name(),)
input_rate = self.u.adc_freq() / self.u.decim_rate()
#print "ADC sampling @ ", eng_notation.num_to_str(self.u.adc_freq())
#print "USB sample rate %s" % (eng_notation.num_to_str(input_rate))
self.subdev.set_gain(options.gain)
r = self.u.tune(0, self.subdev, options.freq)
#print "freq range = [%s, %s]" % (eng_notation.num_to_str(self.subdev.freq_min()), eng_notation.num_to_str(self.subdev.freq_max()))
if not r:
sys.stderr.write('Failed to set frequency\n')
raise SystemExit, 1
# channel configuration
cc = dabp.channel_conf(options.config)
sys.stderr.write("Playing Channel: " + cc.get_label(options.subchid) +
"\n")
start_addr = cc.get_start_addr(options.subchid)
subchsz = cc.get_subchsz(options.subchid)
optprot = cc.get_optprot(options.subchid)
#print "start_addr=%d, subchsz=%d, optprot=%d" % (start_addr, subchsz, optprot)
mode = options.dab_mode
param = dabp.parameters(mode)
# null symbol detector
samples_per_null_sym = param.get_Nnull()
#print "samples per null symbol : %d" % samples_per_null_sym
nulldet = dabp.detect_null(samples_per_null_sym)
# ofdm demod
demod = dabp.ofdm_demod(mode)
# FIC/MSC demultiplexer
demux = dabp.fic_msc_demux(1, mode)
cifsz = param.get_cifsz()
scs = dabp.subchannel_selector(cifsz, start_addr, subchsz)
intlv = dabp.time_deinterleaver(subchsz)
punc = dabp.depuncturer(subchsz, optprot)
I = punc.getI()
vit = dabp.vitdec(I)
scram = dabp.scrambler(I)
len_logfrm = scram.get_nbytes()
sync = dabp.super_frame_sync(len_logfrm)
subchidx = sync.get_subchidx()
rs = dabp.super_frame_rsdec(subchidx)
if options.mplayer:
mplayer = subprocess.Popen([
'mplayer', '-ac', 'faad', '-rawaudio', 'format=0xff',
'-demuxer', 'rawaudio', '-'
],
stdin=subprocess.PIPE)
dst = dabp.super_frame_sink(subchidx, mplayer.stdin.fileno())
else:
dst = dabp.super_frame_sink(subchidx, options.output)
nullsink = gr.null_sink(gr.sizeof_char)
# connect everything
self.connect(self.u, nulldet)
self.connect(self.u, (demod, 0))
self.connect(nulldet, (demod, 1))
self.connect((demod, 0), demux, scs, intlv, punc, vit, scram, sync, rs,
dst)
self.connect((demod, 1), nullsink)