def set_freq_chan0(self, target_freq, sync=True):
"""
Set the center frequency we're interested in for rx chan 0 only on MASTER and SLAVE.
@param target_freq: frequency in Hz
@param sync: sync the usrps after setting the freqs (this will clear any phase differences in the DDCS)
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
rm = usrp.tune(self.um, 0, self.subdevm, target_freq)
rs = usrp.tune(self.us, 0, self.subdevs, target_freq)
r=rm
if sync:
self.sync_usrps() #sync master and slave and clear any DDC phase differences
if r:
self.myform['freq'].set_value(target_freq) # update displayed value
if self.show_debug_info:
self.myform['baseband'].set_value(r.baseband_freq)
self.myform['ddc'].set_value(r.dxc_freq)
return True
return False
def set_freq_chan0(self, target_freq, sync=True):
"""
Set the center frequency we're interested in for rx chan 0 only on MASTER and SLAVE.
@param target_freq: frequency in Hz
@param sync: sync the usrps after setting the freqs (this will clear any phase differences in the DDCS)
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
rm = usrp.tune(self.um, 0, self.subdevm, target_freq)
rs = usrp.tune(self.us, 0, self.subdevs, target_freq)
r=rm
if sync:
self.sync_usrps() #sync master and slave and clear any DDC phase differences
if r:
self.myform['freq'].set_value(target_freq) # update displayed value
if self.show_debug_info:
self.myform['baseband'].set_value(r.baseband_freq)
self.myform['ddc'].set_value(r.dxc_freq)
return True
return False
def __init__( self, decim ):
self.freq = -2.5e6
self.src = usrp.source_c( )
self.subdev = usrp.pick_subdev( self.src,
(usrp_dbid.BASIC_RX,
usrp_dbid.TV_RX,
usrp_dbid.TV_RX_REV_2,
usrp_dbid.TV_RX_REV_3,
usrp_dbid.TV_RX_MIMO,
usrp_dbid.TV_RX_REV_2_MIMO,
usrp_dbid.TV_RX_REV_3_MIMO))
print self.subdev
self.subdevice = usrp.selected_subdev( self.src,
self.subdev )
self.mux = usrp.determine_rx_mux_value( self.src,
self.subdev )
self.decim = decim
self.adc_rate = self.src.adc_rate()
self.usrp_rate = self.adc_rate / self.decim
self.src.set_decim_rate( self.decim )
self.src.set_mux( self.mux )
usrp.tune( self.src, 0, self.subdevice, self.freq )
def tune_all_rx(self, target_freq):
result = True
r1 = usrp.tune(self.usrp_master, 0, self.subdev_mAr, target_freq)
if r1 is None:
result = False
r2 = usrp.tune(self.usrp_master, 1, self.subdev_mBr, target_freq)
if r2 is None:
result = False
r3 = usrp.tune(self.usrp_slave, 0, self.subdev_sAr, target_freq)
if r3 is None:
result = False
r4 = usrp.tune(self.usrp_slave, 1, self.subdev_sBr, target_freq)
if r4 is None:
result = False
return result, r1, r2, r3, r4
def tune_all_rx(self,target_freq):
result = True
r1 = usrp.tune(self.usrp_master, 0, self.subdev_mAr, target_freq)
if r1 is None:
result=False
r2 = usrp.tune(self.usrp_master, 1, self.subdev_mBr, target_freq)
if r2 is None:
result=False
r3 = usrp.tune(self.usrp_slave, 0, self.subdev_sAr, target_freq)
if r3 is None:
result=False
r4 = usrp.tune(self.usrp_slave, 1, self.subdev_sBr, target_freq)
if r4 is None:
result=False
return result,r1,r2,r3,r4
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
r = usrp.tune(self.u, 0, self.subdev, target_freq + self.IF_freq)
#TODO: check if db is inverting the spectrum or not to decide if we should do + self.IF_freq or - self.IF_freq
if r:
self.freq = target_freq
self.myform['freq'].set_value(target_freq) # update displayed value
self.myform['freq_slider'].set_value(target_freq) # update displayed value
self.update_status_bar()
self._set_status_msg("OK", 0)
return True
self._set_status_msg("Failed", 0)
return False
def __init__(self):
gr.top_block.__init__(self)
self.u = usrp.source_c(0, usrp_decim)
print "USRP Serial: ", self.u.serial_number()
usrp_rate = self.u.adc_rate() / usrp_decim # 256 kS/s
rx_subdev_spec = usrp.pick_subdev(self.u, dblist)
self.u.set_mux(usrp.determine_rx_mux_value(self.u, rx_subdev_spec))
self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec)
print "Using d'board", self.subdev.side_and_name()
self.gain = self.subdev.gain_range()[1]
self.subdev.set_gain(self.gain)
r = usrp.tune(self.u, 0, self.subdev, freq)
if r:
print "Freq: ", freq / 1e6, "MHz"
else:
print "Failed to set frequency, quitting!"
sys.exit(1)
chan_filter_coeffs = gr.firdes.low_pass(
1.0, # gain
usrp_rate, # sampling rate
80e3, # passband cutoff
35e3, # transition width
gr.firdes.WIN_HAMMING)
self.chan_filter = gr.fir_filter_ccf(1, chan_filter_coeffs)
print "# channel filter:", len(chan_filter_coeffs), "taps"
self.file_sink = gr.file_sink(gr.sizeof_gr_complex * 1,
"/home/sdr/rds_samples.dat")
self.connect(self.u, self.chan_filter, self.file_sink)
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 __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 set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
self.freq = target_freq
self.myform['freq'].set_value(
target_freq) # update displayed value
self.myform['freq_slider'].set_value(
target_freq) # update displayed value
self.update_status_bar()
self._set_status_msg("OK", 0)
return True
self._set_status_msg("Failed", 0)
return False
def __init__(self): gr.top_block.__init__ (self) self.u = usrp.source_c(0, usrp_decim) print "USRP Serial: ", self.u.serial_number() usrp_rate = self.u.adc_rate() / usrp_decim # 256 kS/s rx_subdev_spec = usrp.pick_subdev(self.u, dblist) self.u.set_mux(usrp.determine_rx_mux_value(self.u, rx_subdev_spec)) self.subdev = usrp.selected_subdev(self.u, rx_subdev_spec) print "Using d'board", self.subdev.side_and_name() self.gain = self.subdev.gain_range()[1] self.subdev.set_gain(self.gain) r = usrp.tune(self.u, 0, self.subdev, freq) if r: print "Freq: ", freq/1e6, "MHz" else: print "Failed to set frequency, quitting!" sys.exit(1) chan_filter_coeffs = gr.firdes.low_pass( 1.0, # gain usrp_rate, # sampling rate 80e3, # passband cutoff 35e3, # transition width gr.firdes.WIN_HAMMING) self.chan_filter = gr.fir_filter_ccf(1, chan_filter_coeffs) print "# channel filter:", len(chan_filter_coeffs), "taps" self.file_sink = gr.file_sink(gr.sizeof_gr_complex*1, "/home/sdr/rds_samples.dat") self.connect(self.u, self.chan_filter, self.file_sink)
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 set_freq(self, target_freq): r = usrp.tune(self.u, 0, self.subdev, target_freq) if r: self.freq = target_freq self.bpsk_demod.reset() self.rds_decoder.reset() return True else: return False
def set_freq(self, target_freq):
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
self.freq = target_freq
self.bpsk_demod.reset()
self.rds_decoder.reset()
return True
else:
return False
def tune(self, freq): result = usrp.tune(self.u, 0, self.subdev, freq) if result: # Use residual_freq in s/w freq translator #self.ddc.set_center_freq(-result.residual_freq) print "residual_freq =", result.residual_freq return True return False
def tune(self, freq):
result = usrp.tune(self.u, 0, self.subdev, freq)
if result:
# Use residual_freq in s/w freq translator
#self.ddc.set_center_freq(-result.residual_freq)
print "residual_freq =", result.residual_freq
return True
return False
def set_freq(self, target_freq):
ok = True
for i in range(len(self.subdev)):
r = usrp.tune(self.u, i, self.subdev[i], target_freq)
if not r:
ok = False
print "set_freq: failed to set subdev[%d] freq to %f" % (
i, target_freq)
return ok
def set_freq(self, target_freq):
ok = True
for i in range(len(self.subdev)):
r = usrp.tune(self.u, i, self.subdev[i], target_freq)
if not r:
ok = False
print "set_freq: failed to set subdev[%d] freq to %f" % (
i, target_freq)
return ok
def __init__(self, decim):
self.freq = -2.5e6
self.src = usrp.source_c()
self.subdev = usrp.pick_subdev(
self.src,
(usrp_dbid.BASIC_RX, usrp_dbid.TV_RX, usrp_dbid.TV_RX_REV_2,
usrp_dbid.TV_RX_REV_3, usrp_dbid.TV_RX_MIMO,
usrp_dbid.TV_RX_REV_2_MIMO, usrp_dbid.TV_RX_REV_3_MIMO))
print self.subdev
self.subdevice = usrp.selected_subdev(self.src, self.subdev)
self.mux = usrp.determine_rx_mux_value(self.src, self.subdev)
self.decim = decim
self.adc_rate = self.src.adc_rate()
self.usrp_rate = self.adc_rate / self.decim
self.src.set_decim_rate(self.decim)
self.src.set_mux(self.mux)
usrp.tune(self.src, 0, self.subdevice, self.freq)
def build_graph (filename, IF_freq, decim_rate, sample_count):
# Initialize empty flow graph
fg = gr.top_block ()
# Pick USRP 0 and set the decimation rate
src = usrp.source_c (0)
src.set_decim_rate(decim_rate)
# Select side-A of the board, set the mux, get a handle
# to the board, and then tune it to the specified freq
subdev_spec = (0,0)
src.set_mux(usrp.determine_rx_mux_value(src, subdev_spec))
subdev = usrp.selected_subdev(src, subdev_spec)
usrp.tune(src, 0, subdev, IF_freq)
# Connect the flow graph
dst = gr.file_sink (gr.sizeof_gr_complex, filename)
head = gr.head(gr.sizeof_gr_complex, sample_count)
fg.connect(src, head, dst)
return fg
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, interp, subdev_spec, freq):
self._usrp = usrp.sink_c(which=which, interp_rate=interp)
if subdev_spec is None:
subdev_spec = usrp.pick_tx_subdevice(self._usrp)
self._usrp.set_mux(usrp.determine_tx_mux_value(self._usrp, subdev_spec))
self._subdev = usrp.selected_subdev(self._usrp, subdev_spec)
tr = usrp.tune(self._usrp, self._subdev.which(), self._subdev, freq)
if not (tr):
print "Failed to tune to center frequency!"
else:
print "Center frequency:", n2s(freq)
gain = float(self._subdev.gain_range()[1]) # Max TX gain
self._subdev.set_gain(gain)
self._subdev.set_enable(True)
print "TX d'board:", self._subdev.side_and_name()
def set_freq(self, target_freq): """ Set the center frequency we're interested in. @param target_freq: frequency in Hz """ # # r = usrp.tune(self.u, self.subdev[0].which(), self.subdev[0], target_freq) r = usrp.tune(self.u, self.subdev[1].which(), self.subdev[1], target_freq) if r: self.myform['freq'].set_value(target_freq) # update displayed value # # Make sure calibrator knows our target freq # # Remember centerfreq---used for doppler calcs delta = self.centerfreq - target_freq self.centerfreq = target_freq self.observing -= delta self.scope.set_baseband_freq (self.observing) self.myform['baseband'].set_value(r.baseband_freq) self.myform['ddc'].set_value(r.dxc_freq) if (self.use_notches): self.compute_notch_taps(self.notches) if self.dual_mode == False and self.interferometer == False: self.notch_filt.set_taps(self.notch_taps) else: self.notch_filt1.set_taps(self.notch_taps) self.notch_filt2.set_taps(self.notch_taps) return True return False
def set_freq (self, f):
""" assumes subdev has been set """
if abs(f) < 1e6: f = f*1e6
self.freq = f
if self.fake_rf: return # no subdev for fake rf
for s in self.subdev:
r = usrp.tune(s._u, s.which(), s, self.freq)
if r and (self.verbose > 0):
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)) )
sys.stderr.write(" residual frequency = %s\n"%(eng_notation.num_to_str(r.residual_freq)) )
sys.stderr.write(" inverted = %s\n"%(r.inverted) )
elif not r:
self.error("Unable to set frequency of " \
+ "%s to %g MHz"%(str(s),self.freq/1.0e6) )
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 set_freq(self, target_freq):
if (88<target_freq<108): target_freq *= 1e6
elif (target_freq<88e6) or (target_freq>108e6): return False
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
self.freq = target_freq
self.myform['freq'].set_value(target_freq)
self.myform['freq_slider'].set_value(target_freq)
self.rdspanel.frequency.SetLabel('%3.2f' % (target_freq/1e6))
self.update_status_bar()
self.bpsk_demod.reset()
self.rds_decoder.reset()
self.rdspanel.clear_data()
self._set_status_msg("OK", 0)
return True
else:
self._set_status_msg("Failed", 0)
return False
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
#
# Everything except BASIC_RX should support usrp.tune()
#
if not (self.cardtype == usrp_dbid.BASIC_RX):
r = usrp.tune(self.u, 0, self.subdev, target_freq)
else:
r = self.u.set_rx_freq(0, target_freq)
f = self.u.rx_freq(0)
if abs(f-target_freq) > 2.0e3:
r = 0
if r:
self.myform['freq'].set_value(target_freq) # update displayed value
#
# Make sure calibrator knows our target freq
#
# Remember centerfreq---used for doppler calcs
delta = self.centerfreq - target_freq
self.centerfreq = target_freq
self.observing -= delta
self.scope.set_baseband_freq (self.observing)
self.myform['baseband'].set_value(r.baseband_freq)
self.myform['ddc'].set_value(r.dxc_freq)
if self.use_notches == True:
self.compute_notch_taps(self.notches)
self.notch_filt.set_taps(self.notch_taps)
return True
return False
def _setup_usrp_sink(self, options):
"""
Creates a USRP sink, determines the settings for best bitrate,
and attaches to the transmitter's subdevice.
"""
#self.u = usrp_options.create_usrp_sink(options)
self.rs_rate = options.rate # Store requested bit rate
if_rate = options.rate*options.sps
self._interp = int(_dac_rate/if_rate)
options.interp = self._interp
self.u = usrp.sink_c(which = options.which, interp_rate = options.interp)
if options.tx_subdev_spec is None:
options.tx_subdev_spec = usrp.pick_tx_subdevice(self.u)
self.u.set_mux(usrp.determine_tx_mux_value(self.u, options.tx_subdev_spec))
self._subdev = usrp.selected_subdev(self.u, options.tx_subdev_spec)
tr = usrp.tune(self.u, self._subdev.which(), self._subdev, options.freq)
if not (tr):
print "Failed to tune to center frequency!"
else:
print "Center frequency:", n2s(options.freq)
gain = float(self._subdev.gain_range()[1]) # Max TX gain
self._subdev.set_gain(gain)
self._subdev.set_enable(True)
print "TX d'board:", self._subdev.side_and_name()
#initiate hardly the value of bits per symbol to 1
self.bits_per_symbol = 1
# (self._bitrate, self._samples_per_symbol, self._interp) = \
# pick_bitrate.pick_tx_bitrate(options.bitrate, self.bits_per_symbol,
# options.samples_per_symbol, options.interp,
# dac_rate, self.u.get_interp_rates())
if options.verbose:
print 'USRP Sink:', self.u
print "Interpolation Rate: ", self._interp
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
self.myform['freq'].set_value(
target_freq) # update displayed value
self.myform['baseband'].set_value(r.baseband_freq)
self.myform['ddc'].set_value(r.dxc_freq)
# Adjust self.frequency, and self.observing_freq
# We pick up the difference between the current self.frequency
# and the just-programmed one, and use this to adjust
# self.observing_freq. We have to do it this way to
# make the dedispersion filtering work out properly.
delta = target_freq - self.frequency
self.frequency = target_freq
self.observing_freq += delta
# Now that we're adjusted, compute a new dispfilter, and
# set the taps for the FFT filter.
ntaps = self.compute_disp_ntaps(self.dm, self.bw,
self.observing_freq)
self.disp_taps = Numeric.zeros(ntaps, Numeric.Complex64)
self.compute_dispfilter(self.dm, self.doppler, self.bw,
self.observing_freq)
self.dispfilt.set_taps(self.disp_taps)
return True
return False
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
self.myform['freq'].set_value(target_freq) # update displayed value
if self.show_debug_info:
self.myform['baseband'].set_value(r.baseband_freq)
self.myform['ddc'].set_value(r.dxc_freq)
return True
return False
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
self.myform['freq'].set_value(target_freq) # update displayed value
self.myform['baseband'].set_value(r.baseband_freq)
self.myform['ddc'].set_value(r.dxc_freq)
# Adjust self.frequency, and self.observing_freq
# We pick up the difference between the current self.frequency
# and the just-programmed one, and use this to adjust
# self.observing_freq. We have to do it this way to
# make the dedispersion filtering work out properly.
delta = target_freq - self.frequency
self.frequency = target_freq
self.observing_freq += delta
# Now that we're adjusted, compute a new dispfilter, and
# set the taps for the FFT filter.
ntaps = self.compute_disp_ntaps(self.dm, self.bw, self.observing_freq)
self.disp_taps = Numeric.zeros(ntaps, Numeric.Complex64)
self.compute_dispfilter(self.dm,self.doppler,self.bw,
self.observing_freq)
self.dispfilt.set_taps(self.disp_taps)
return True
return False
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter in the
FPGA. Finally, we feed any residual_freq to the s/w freq
translator.
"""
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
# Use residual_freq in s/w freq translater
# print "residual_freq =", r.residual_freq
self.ddc.set_center_freq(-r.residual_freq)
return True
return False
def set_freq2(self, target_freq):
"""
Set the center frequency of we're interested in for the second channel.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter.
"""
r = usrp.tune(self.u, 1, self.subdev, target_freq)
if r:
self.myform['freq2'].set_value(
target_freq) # update displayed value
if self.show_debug_info:
self.myform['baseband2'].set_value(r.baseband_freq)
self.myform['ddc2'].set_value(r.dxc_freq)
return True
return False
def set_freq(self, target_freq):
"""
Set the center frequency we're interested in.
@param target_freq: frequency in Hz
@rypte: bool
Tuning is a two step process. First we ask the front-end to
tune as close to the desired frequency as it can. Then we use
the result of that operation and our target_frequency to
determine the value for the digital down converter in the
FPGA. Finally, we feed any residual_freq to the s/w freq
translator.
"""
r = usrp.tune(self.u, 0, self.subdev, target_freq)
if r:
# Use residual_freq in s/w freq translater
# print "residual_freq =", r.residual_freq
self.ddc.set_center_freq(-r.residual_freq)
return True
return False
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 set_freq(self, x):
r = usrp.tune(self.src, 0, self.subdevice, -x)
if r:
self.freq = -x
def __init__(self):
gr.top_block.__init__(self)
amplitude = 5000
interp_rate = 256
dec_rate = 16
sw_dec = 5
num_taps = int(64000 / ( (dec_rate * 4) * 40 )) #Filter matched to 1/4 of the 40 kHz tag cycle
taps = [complex(1,1)] * num_taps
matched_filt = gr.fir_filter_ccc(sw_dec, taps);
agc = gr.agc2_cc(0.3, 1e-3, 1, 1, 100)
to_mag = gr.complex_to_mag()
center = rfid.center_ff(10)
omega = 5
mu = 0.25
gain_mu = 0.25
gain_omega = .25 * gain_mu * gain_mu
omega_relative_limit = .05
mm = gr.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu, omega_relative_limit)
self.reader = rfid.reader_f(int(128e6/interp_rate));
tag_decoder = rfid.tag_decoder_f()
command_gate = rfid.command_gate_cc(12, 250, 64000000 / dec_rate / sw_dec)
to_complex = gr.float_to_complex()
amp = gr.multiply_const_ff(amplitude)
#output the TX and RX signals only
f_txout = gr.file_sink(gr.sizeof_gr_complex, 'f_txout.out');
f_rxout = gr.file_sink(gr.sizeof_gr_complex, 'f_rxout.out');
#TX
# working frequency at 915 MHz by default and RX Gain of 20
freq = options.center_freq #915e6
rx_gain = options.rx_gain #20
tx = usrp.sink_c(fusb_block_size = 512, fusb_nblocks=4)
tx.set_interp_rate(256)
tx_subdev = (0,0)
tx.set_mux(usrp.determine_tx_mux_value(tx, tx_subdev))
subdev = usrp.selected_subdev(tx, tx_subdev)
subdev.set_enable(True)
subdev.set_gain(subdev.gain_range()[2])
t = tx.tune(subdev.which(), subdev, freq)
if not t:
print "Couldn't set tx freq"
#End TX
#RX
rx = usrp.source_c(0, dec_rate, fusb_block_size = 512, fusb_nblocks = 4)
rx_subdev_spec = (1,0)
rx.set_mux(usrp.determine_rx_mux_value(rx, rx_subdev_spec))
rx_subdev = usrp.selected_subdev(rx, rx_subdev_spec)
rx_subdev.set_gain(rx_gain)
rx_subdev.set_auto_tr(False)
rx_subdev.set_enable(True)
r = usrp.tune(rx, 0, rx_subdev, freq)
self.rx = rx
if not r:
print "Couldn't set rx freq"
#End RX
command_gate.set_ctrl_out(self.reader.ctrl_q())
tag_decoder.set_ctrl_out(self.reader.ctrl_q())
#########Build Graph
self.connect(rx, matched_filt)
self.connect(matched_filt, command_gate)
self.connect(command_gate, agc)
self.connect(agc, to_mag)
self.connect(to_mag, center, mm, tag_decoder)
self.connect(tag_decoder, self.reader, amp, to_complex, tx);
#################
#Output dumps for debug
self.connect(rx, f_rxout);
self.connect(to_complex, f_txout);
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 set_freq( self, x ):
r = usrp.tune( self.src, 0, self.subdevice, -x )
if r:
self.freq = -x
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 main():
# Parsing command line parameter
parser = OptionParser(option_class=eng_option)
parser.add_option(
"-f",
"--freq",
type="eng_float",
dest="freq",
default=866.5,
help="set USRP center frequency (provide frequency in MHz)")
parser.add_option("-m",
"--miller",
type="int",
dest="miller",
default=2,
help="set number of Miller subcarriers (2,4 or 8)")
(options, args) = parser.parse_args()
which_usrp = 0
fpga = "gen2_reader_2ch_mod_pwr.rbf" # Modified firmware --> you can set TX amplitude directly from Python (see below)
freq = options.freq # Default value = 866.5 --> center frequency of 2 MHz European RFID Band
freq = freq * 1e6
miller = options.miller
deviation_corr = 1 # Maximum deviation for Early/Late gate correlator in Buettner's reader
amplitude = 30000 # Amplitude of READER TX signal. 30000 is the maximum allowed.
rx_gain = 20
us_per_sample = float(1 / (64.0 / (dec_rate * sw_dec)))
samp_freq = (64 / dec_rate) * 1e6
# BUETTNER'S READER HARDWARE SUB-SYSTEM for TX SIDE
tx = usrp.sink_c(which_usrp,
fusb_block_size=1024,
fusb_nblocks=4,
fpga_filename=fpga)
tx.set_interp_rate(interp)
tx_subdev = (0, 0) # TX/RX port of RFX900 daugtherboard on SIDE A
tx.set_mux(usrp.determine_tx_mux_value(tx, tx_subdev))
subdev = usrp.selected_subdev(tx, tx_subdev)
subdev.set_enable(True)
subdev.set_gain(subdev.gain_range()[2])
t = tx.tune(subdev.which(), subdev,
freq) # Tuning TX Daughterboard @ Center Frequency
if not t:
print "Couldn't set READER TX frequency"
tx._write_fpga_reg(usrp.FR_USER_1, int(
amplitude)) # SET FPGA register value with the desired tx amplitude
# END BUETTNER'S READER HARDWARE SUB-SYSTEM for TX SIDE
# BUETTNER'S READER HARDWARE SUB-SYSTEM for RX SIDE
rx = usrp.source_c(
which_usrp,
dec_rate,
nchan=2,
fusb_block_size=512,
fusb_nblocks=16,
fpga_filename=fpga) # USRP source: 2 channels (reader + listener)
rx.set_mux(rx.determine_rx_mux_value(
(0, 0), (1, 0)
)) # 2 channel mux --> rx from (0,0) to reader - rx from (1,0) to listener
rx_reader_subdev_spec = (0, 0) # Reader RFX900 daugtherboard on SIDE A
rx_reader_subdev = rx.selected_subdev(rx_reader_subdev_spec)
rx_reader_subdev.set_gain(rx_gain)
rx_reader_subdev.set_auto_tr(False)
rx_reader_subdev.set_enable(True)
rx_reader_subdev.select_rx_antenna(
'RX2'
) # RX2 port of RFX900 on side A --> RX antenna of Buettner's reader
r = usrp.tune(rx, 0, rx_reader_subdev,
freq) # Tuning READER RX Daughterboard @ Center Frequency
if not r:
print "Couldn't set READER RX frequency"
# END BUETTNER'S READER HARDWARE SUB-SYSTEM for TX SIDE
# LISTENER HARDWARE SUB-SYSTEM
rx_listener_subdev_spec = (1, 0) # Listener DB RFX900 on side B
rx_listener_subdev = rx.selected_subdev(rx_listener_subdev_spec)
rx_listener_subdev.set_gain(rx_gain)
rx_listener_subdev.set_auto_tr(False)
rx_listener_subdev.set_enable(True)
rx_listener_subdev.select_rx_antenna(
'RX2'
) # RX Antenna on RX2 Connector of side B RFX900 (comment this line if you want TX/RX connector)
r = usrp.tune(rx, 1, rx_listener_subdev,
freq) # Tuning Listener Daughterboard @ Center Frequency
if not r:
print "Couldn't set LISTENER RX frequency"
# END LISTENER HARDWARE SUB-SYSTEM
print ""
print "********************************************************"
print "************ Gen2 RFID Monitoring Platform *************"
print "********* Reader and Listener on the same USRP *********"
print "********************************************************\n"
print "USRP center frequency: %s MHz" % str(freq / 1e6)
print "Sampling Frequency: " + str(
samp_freq /
1e6) + " MHz" + " --- microsec. per Sample: " + str(us_per_sample)
# BUETTNER's READER SOFTWARE SUB-SYSTEM (GNU-Radio flow-graph)
gen2_reader = rfid.gen2_reader(dec_rate * sw_dec * samples_per_pulse,
interp, int(miller), True,
int(deviation_corr))
zc = rfid.clock_recovery_zc_ff(samples_per_pulse, 1, float(us_per_sample),
float(up_link_freq), True)
# END BUETTNER's READER SOFTWARE SUB-SYSTEM (GNU-Radio flow-graph)
# LISTENER SOFTWARE SUB-SYSTEM (GNU-Radio flow-graph)
# MATCHED FILTER
num_taps = int(
64000 / (dec_rate * up_link_freq * 4)) #Matched filter for 1/4 cycle
taps = [complex(1, 1)] * num_taps
matched_filter = gr.fir_filter_ccc(sw_dec, taps)
# Tag Decoding Block --> the boolean value in input indicate if real-time output of EPC is enabled or not
tag_monitor = listener.tag_monitor(True, int(miller), float(up_link_freq))
# Clock recovery
cr = listener.clock_recovery(samples_per_pulse, us_per_sample,
tag_monitor.STATE_PTR, float(up_link_freq))
# Reader Decoding Block and Command gate--> the boolean value indicate if real-time output of reader commands is enabled or not
reader_monitor_cmd_gate = listener.reader_monitor_cmd_gate(
False, us_per_sample, tag_monitor.STATE_PTR, float(up_link_freq),
float(rtcal))
# END LISTENER SOFTWARE SUB-SYSTEM (GNU-Radio flow-graph)
# Create GNU-Radio flow-graph
tb = my_top_block(tx, zc, gen2_reader, rx, matched_filter,
reader_monitor_cmd_gate, cr, tag_monitor, amplitude)
# Start application
tb.start()
# GETTING LOGs from BUETTNER's READER
video_output = False # Set as True if you want real time video output of Buettner's reader logs
log_reader_buettner_file = open("log_reader_buettner.log", "w")
finish = 0
succ_reads = 0
epc_errors = 0
while 1:
log_reader_buettner = gen2_reader.get_log()
i = log_reader_buettner.count()
for k in range(0, i):
msg = log_reader_buettner.delete_head_nowait()
print_msg(msg, log_reader_buettner_file, video_output)
if msg.type() == 99: # All cycles are terminated
finish = 1
if msg.type() == LOG_EPC: # EPC
if msg.arg2() == LOG_ERROR:
epc_errors = epc_errors + 1
# CRC Error on EPC
else:
succ_reads = succ_reads + 1
# Successful EPc
if finish:
break
# Stop application
tb.stop()
log_reader_buettner_file.close()
rec_frames = succ_reads + epc_errors
print "\nReader --> Total Received Frames: " + str(rec_frames)
print "Reader --> Successful reads: " + str(succ_reads)
print "Reader --> CRC error frames: " + str(epc_errors)
print ""
# GETTING LOGs from LISTENER
log_READER = reader_monitor_cmd_gate.get_reader_log()
log_TAG = tag_monitor.get_tag_log()
print "Listener collected %s Entries for READER LOG" % str(
log_READER.count())
print "Listener collected %s Entries for TAG LOG" % str(log_TAG.count())
c = raw_input("PRESS 'f' to write LOG files, 'q' to QUIT\n")
if c == "q":
print "\n Shutting Down...\n"
return
if c == "f":
print "\n Writing READER LOG on file...\n\n"
reader_file = open("reader_log.out", "w")
reader_file.close()
reader_file = open("reader_log.out", "a")
i = log_READER.count()
for k in range(0, i):
decode_reader_log_msg(log_READER.delete_head_nowait(), reader_file)
k = k + 1
reader_file.close()
print "\n Writing TAG LOG on file...\n"
tag_file = open("tag_log.out", "w")
tag_file.close()
tag_file = open("tag_log.out", "a")
i = log_TAG.count()
for k in range(0, i):
decode_tag_log_msg(log_TAG.delete_head_nowait(), tag_file)
k = k + 1
tag_file.close()
def main():
#TX
which_usrp = 0
fpga = "gen2_reader.rbf"
freq = 915e6
rx_gain = 20
samp_freq = (64 / dec_rate) * 1e6
tx = usrp.sink_c(which_usrp,fusb_block_size = 1024, fusb_nblocks=4, fpga_filename=fpga)
tx.set_interp_rate(interp)
tx_subdev = (0,0)
tx.set_mux(usrp.determine_tx_mux_value(tx, tx_subdev))
subdev = usrp.selected_subdev(tx, tx_subdev)
subdev.set_enable(True)
subdev.set_gain(subdev.gain_range()[2])
t = tx.tune(subdev.which(), subdev, freq)
if not t:
print "Couldn't set tx freq"
#End TX
#RX
rx = usrp.source_c(which_usrp, dec_rate, fusb_block_size = 512, fusb_nblocks = 16, fpga_filename=fpga)
rx_subdev_spec = (1,0)
rx.set_mux(usrp.determine_rx_mux_value(rx, rx_subdev_spec))
rx_subdev = usrp.selected_subdev(rx, rx_subdev_spec)
rx_subdev.set_gain(rx_gain)
rx_subdev.set_auto_tr(False)
rx_subdev.set_enable(True)
us_per_sample = 1 / (64.0 / dec_rate / sw_dec)
print "Sample Frequency: "+ str(samp_freq) + " us Per Sample: " + str(us_per_sample)
r = usrp.tune(rx, 0, rx_subdev, freq)
if not r:
print "Couldn't set rx freq"
#End RX
gen2_reader = rfid.gen2_reader(dec_rate * sw_dec * samples_per_pulse, interp)
tb = my_top_block(rx, gen2_reader, tx)
tb.start()
log_file = open("log_out.log", "w")
while 1:
c = raw_input("'Q' to quit\n")
if c == "q":
break
if c == "A" or c == "a":
log_file.write("T,CMD,ERROR,BITS,SNR\n")
log = gen2_reader.get_log()
print "Log has %s Entries"% (str(log.count()))
i = log.count();
for k in range(0, i):
msg = log.delete_head_nowait()
print_log_msg(msg, log_file)
tb.stop()
log_file.close()
def tune(self, freq): result = usrp.tune(self._src, 0, self._subdev, freq+self._cal)
def main():
#TX
which_usrp = 0
fpga = "gen2_reader.rbf"
freq = 915e6
rx_gain = 20
samp_freq = (64 / dec_rate) * 1e6
tx = usrp.sink_c(which_usrp,
fusb_block_size=1024,
fusb_nblocks=4,
fpga_filename=fpga)
tx.set_interp_rate(interp)
tx_subdev = (0, 0)
tx.set_mux(usrp.determine_tx_mux_value(tx, tx_subdev))
subdev = usrp.selected_subdev(tx, tx_subdev)
subdev.set_enable(True)
subdev.set_gain(subdev.gain_range()[2])
t = tx.tune(subdev.which(), subdev, freq)
if not t:
print "Couldn't set tx freq"
#End TX
#RX
rx = usrp.source_c(which_usrp,
dec_rate,
fusb_block_size=512,
fusb_nblocks=16,
fpga_filename=fpga)
rx_subdev_spec = (1, 0)
rx.set_mux(usrp.determine_rx_mux_value(rx, rx_subdev_spec))
rx_subdev = usrp.selected_subdev(rx, rx_subdev_spec)
rx_subdev.set_gain(rx_gain)
rx_subdev.set_auto_tr(False)
rx_subdev.set_enable(True)
us_per_sample = 1 / (64.0 / dec_rate / sw_dec)
print "Sample Frequency: " + str(samp_freq) + " us Per Sample: " + str(
us_per_sample)
r = usrp.tune(rx, 0, rx_subdev, freq)
if not r:
print "Couldn't set rx freq"
#End RX
gen2_reader = rfid.gen2_reader(dec_rate * sw_dec * samples_per_pulse,
interp)
tb = my_top_block(rx, gen2_reader, tx)
tb.start()
log_file = open("log_out.log", "w")
while 1:
c = raw_input("'Q' to quit\n")
if c == "q":
break
if c == "A" or c == "a":
log_file.write("T,CMD,ERROR,BITS,SNR\n")
log = gen2_reader.get_log()
print "Log has %s Entries" % (str(log.count()))
i = log.count()
for k in range(0, i):
msg = log.delete_head_nowait()
print_log_msg(msg, log_file)
tb.stop()
log_file.close()
def __init__(self):
gr.top_block.__init__(self)
amplitude = 30000
filt_out = gr.file_sink(gr.sizeof_gr_complex, "./filt.out")
filt2_out = gr.file_sink(gr.sizeof_gr_complex, "./filt2.out")
ffilt_out = gr.file_sink(gr.sizeof_float, "./ffilt.out")
ffilt2_out = gr.file_sink(gr.sizeof_float, "./ffilt2.out")
interp_rate = 128
dec_rate = 8
sw_dec = 4
num_taps = int(64000 / ( (dec_rate * 4) * 256 )) #Filter matched to 1/4 of the 256 kHz tag cycle
taps = [complex(1,1)] * num_taps
matched_filt = gr.fir_filter_ccc(sw_dec, taps);
agc = gr.agc2_cc(0.3, 1e-3, 1, 1, 100)
to_mag = gr.complex_to_mag()
center = rfid.center_ff(4)
omega = 2
mu = 0.25
gain_mu = 0.25
gain_omega = .25 * gain_mu * gain_mu
omega_relative_limit = .05
mm = gr.clock_recovery_mm_ff(omega, gain_omega, mu, gain_mu, omega_relative_limit)
self.reader = rfid.reader_f(int(128e6/interp_rate));
tag_decoder = rfid.tag_decoder_f()
command_gate = rfid.command_gate_cc(12, 60, 64000000 / dec_rate / sw_dec)
to_complex = gr.float_to_complex()
amp = gr.multiply_const_ff(amplitude)
f_sink = gr.file_sink(gr.sizeof_gr_complex, 'f_sink.out');
f_sink2 = gr.file_sink(gr.sizeof_gr_complex, 'f_sink2.out');
#TX
freq = 915e6
rx_gain = 20
tx = usrp.sink_c(fusb_block_size = 1024, fusb_nblocks=8)
tx.set_interp_rate(interp_rate)
tx_subdev = (0,0)
tx.set_mux(usrp.determine_tx_mux_value(tx, tx_subdev))
subdev = usrp.selected_subdev(tx, tx_subdev)
subdev.set_enable(True)
subdev.set_gain(subdev.gain_range()[2])
t = tx.tune(subdev.which(), subdev, freq)
if not t:
print "Couldn't set tx freq"
#End TX
#RX
rx = usrp.source_c(0, dec_rate, fusb_block_size = 512 * 4, fusb_nblocks = 16)
rx_subdev_spec = (1,0)
rx.set_mux(usrp.determine_rx_mux_value(rx, rx_subdev_spec))
rx_subdev = usrp.selected_subdev(rx, rx_subdev_spec)
rx_subdev.set_gain(rx_gain)
rx_subdev.set_auto_tr(False)
rx_subdev.set_enable(True)
r = usrp.tune(rx, 0, rx_subdev, freq)
self.rx = rx
if not r:
print "Couldn't set rx freq"
#End RX
command_gate.set_ctrl_out(self.reader.ctrl_q())
tag_decoder.set_ctrl_out(self.reader.ctrl_q())
agc2 = gr.agc2_ff(0.3, 1e-3, 1, 1, 100)
#########Build Graph
self.connect(rx, matched_filt)
self.connect(matched_filt, command_gate)
self.connect(command_gate, agc)
self.connect(agc, to_mag)
self.connect(to_mag, center, agc2, mm, tag_decoder)
self.connect(tag_decoder, self.reader, amp, to_complex, tx);
#################
self.connect(matched_filt, filt_out)
def tune(self, freq):
result = usrp.tune(self._src, 0, self._subdev, freq + self._cal)