From 54d6b9281dc233e0b2acf26884073d973b7663de Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Tue, 4 Sep 2007 02:43:56 +0000
Subject: Merged r6271:6278 from jcorgan/t182 into trunk. Implements
ticket:182.
Created new top-level component, gr-utils, to hold commonly used utility
scripts (originally in gnuradio-examples). These now install into the
system path, allowing their use from wherever.
Reorganization of gnuradio-examples component:
* Commonly used utility scripts moved from python/usrp into gr-utils.
* Examples now install into $(prefix)/share/gnuradio/examples/...
* Channel coding examples moved into gr-trellis/src/examples, now install
from there, only if gr-atsc itself is going to built and installed.
* ATSC example scripts now install into example hierarchy
* Cruft has been moved into 'limbo' in repository, do not get installed
Trunk passes 'make distcheck'.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@6279 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/usrp/usrp_rx_nogui.py | 186 -------------------------
1 file changed, 186 deletions(-)
delete mode 100755 gnuradio-examples/python/usrp/usrp_rx_nogui.py
(limited to 'gnuradio-examples/python/usrp/usrp_rx_nogui.py')
diff --git a/gnuradio-examples/python/usrp/usrp_rx_nogui.py b/gnuradio-examples/python/usrp/usrp_rx_nogui.py
deleted file mode 100755
index b33d626e28..0000000000
--- a/gnuradio-examples/python/usrp/usrp_rx_nogui.py
+++ /dev/null
@@ -1,186 +0,0 @@
-#!/usr/bin/env python
-
-from gnuradio import gr, gru, usrp, optfir, audio, eng_notation, blks
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-
-"""
-This example application demonstrates receiving and demodulating
-different types of signals using the USRP.
-
-A receive chain is built up of the following signal processing
-blocks:
-
-USRP - Daughter board source generating complex baseband signal.
-CHAN - Low pass filter to select channel bandwidth
-RFSQL - RF squelch zeroing output when input power below threshold
-AGC - Automatic gain control leveling signal at [-1.0, +1.0]
-DEMOD - Demodulation block appropriate to selected signal type.
- This converts the complex baseband to real audio frequencies,
- and applies an appropriate low pass decimating filter.
-CTCSS - Optional tone squelch zeroing output when tone is not present.
-RSAMP - Resampler block to convert audio sample rate to user specified
- sound card output rate.
-AUDIO - Audio sink for playing final output to speakers.
-
-The following are required command line parameters:
-
--f FREQ USRP receive frequency
--m MOD Modulation type, select from AM, FM, or WFM
-
-The following are optional command line parameters:
-
--R SUBDEV Daughter board specification, defaults to first found
--c FREQ Calibration offset. Gets added to receive frequency.
- Defaults to 0.0 Hz.
--g GAIN Daughterboard gain setting. Defaults to mid-range.
--o RATE Sound card output rate. Defaults to 32000. Useful if
- your sound card only accepts particular sample rates.
--r RFSQL RF squelch in db. Defaults to -50.0.
--p FREQ CTCSS frequency. Opens squelch when tone is present.
-
-Once the program is running, ctrl-break (Ctrl-C) stops operation.
-
-Please see fm_demod.py and am_demod.py for details of the demodulation
-blocks.
-"""
-
-# (usrp_decim, channel_decim, audio_decim, channel_pass, channel_stop, demod)
-demod_params = {
- 'AM' : (250, 16, 1, 5000, 8000, blks.demod_10k0a3e_cf),
- 'FM' : (250, 8, 4, 8000, 9000, blks.demod_20k0f3e_cf),
- 'WFM' : (250, 1, 8, 90000, 100000, blks.demod_200kf3e_cf)
- }
-
-class usrp_source_c(gr.hier_block):
- """
- Create a USRP source object supplying complex floats.
-
- Selects user supplied subdevice or chooses first available one.
-
- Calibration value is the offset from the tuned frequency to
- the actual frequency.
- """
- def __init__(self, fg, subdev_spec, decim, gain=None, calibration=0.0):
- 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
- gr.hier_block.__init__(self, fg, self._src, self._src)
-
- def tune(self, freq):
- result = usrp.tune(self._src, 0, self._subdev, freq+self._cal)
- # TODO: deal with residual
-
- def rate(self):
- return self._src.adc_rate()/self._decim
-
-class app_flow_graph(gr.flow_graph):
- def __init__(self, options, args):
- gr.flow_graph.__init__(self)
- self.options = options
- self.args = args
-
- (usrp_decim, channel_decim, audio_decim,
- channel_pass, channel_stop, demod) = demod_params[options.modulation]
-
- USRP = usrp_source_c(self, # Flow graph
- options.rx_subdev_spec, # Daugherboard spec
- usrp_decim, # IF decimation ratio
- options.gain, # Receiver gain
- options.calibration) # Frequency offset
- USRP.tune(options.frequency)
-
- if_rate = USRP.rate()
- channel_rate = if_rate // channel_decim
- audio_rate = channel_rate // audio_decim
-
- CHAN_taps = optfir.low_pass(1.0, # Filter gain
- if_rate, # Sample rate
- channel_pass, # One sided modulation bandwidth
- channel_stop, # One sided channel bandwidth
- 0.1, # Passband ripple
- 60) # Stopband attenuation
-
- CHAN = gr.freq_xlating_fir_filter_ccf(channel_decim, # Decimation rate
- CHAN_taps, # Filter taps
- 0.0, # Offset frequency
- if_rate) # Sample rate
-
- RFSQL = gr.pwr_squelch_cc(options.rf_squelch, # Power threshold
- 125.0/channel_rate, # Time constant
- channel_rate/20, # 50ms rise/fall
- False) # Zero, not gate output
-
- AGC = gr.agc_cc(1.0/channel_rate, # Time constant
- 1.0, # Reference power
- 1.0, # Initial gain
- 1.0) # Maximum gain
-
- DEMOD = demod(self, channel_rate, audio_decim)
-
- # From RF to audio
- self.connect(USRP, CHAN, RFSQL, AGC, DEMOD)
-
- # Optionally add CTCSS and RSAMP if needed
- tail = DEMOD
- if options.ctcss != None and options.ctcss > 60.0:
- CTCSS = gr.ctcss_squelch_ff(audio_rate, # Sample rate
- options.ctcss) # Squelch tone
- self.connect(DEMOD, CTCSS)
- tail = CTCSS
-
- if options.output_rate != audio_rate:
- out_lcm = gru.lcm(audio_rate, options.output_rate)
- out_interp = int(out_lcm // audio_rate)
- out_decim = int(out_lcm // options.output_rate)
- RSAMP = blks.rational_resampler_fff(self, out_interp, out_decim)
- self.connect(tail, RSAMP)
- tail = RSAMP
-
- # Send to default audio output
- AUDIO = audio.sink(options.output_rate, "")
- self.connect(tail, AUDIO)
-
-def main():
- parser = OptionParser(option_class=eng_option)
- parser.add_option("-f", "--frequency", type="eng_float",
- help="set receive frequency to Hz", metavar="Hz")
- parser.add_option("-R", "--rx-subdev-spec", type="subdev",
- help="select USRP Rx side A or B", metavar="SUBDEV")
- parser.add_option("-c", "--calibration", type="eng_float", default=0.0,
- help="set frequency offset to Hz", metavar="Hz")
- parser.add_option("-g", "--gain", type="int", default=None,
- help="set RF gain", metavar="dB")
- parser.add_option("-m", "--modulation", type="choice", choices=('AM','FM','WFM'),
- help="set modulation type (AM,FM)", metavar="TYPE")
- parser.add_option("-o", "--output-rate", type="int", default=32000,
- help="set audio output rate to RATE", metavar="RATE")
- parser.add_option("-r", "--rf-squelch", type="eng_float", default=-50.0,
- help="set RF squelch to dB", metavar="dB")
- parser.add_option("-p", "--ctcss", type="float",
- help="set CTCSS squelch to FREQ", metavar="FREQ")
- (options, args) = parser.parse_args()
-
- if options.frequency < 1e6:
- options.frequency *= 1e6
-
- fg = app_flow_graph(options, args)
- try:
- fg.run()
- except KeyboardInterrupt:
- pass
-
-if __name__ == "__main__":
- main()
--
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