[Commit-gnuradio] r8455 - in gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python: . mp-sched

[eb]

Author: eb
Date: 2008-05-19 20:34:13 -0600 (Mon, 19 May 2008)
New Revision: 8455

Added:
   gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/
   
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/README
   
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/wfm_rcv_pll_to_wav.py
Log:
version of wfm_rcv_pll that reads and writes from files

Added: 
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/README
===================================================================
--- 
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/README
                           (rev 0)
+++ 
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/README
   2008-05-20 02:34:13 UTC (rev 8455)
@@ -0,0 +1,2 @@
+These are pieces of code used to test and benchmark the
+multi-processor scheduler.

Copied: 
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/wfm_rcv_pll_to_wav.py
 (from rev 8447, 
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/usrp/usrp_wfm_rcv_pll.py)
===================================================================
--- 
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/wfm_rcv_pll_to_wav.py
                            (rev 0)
+++ 
gnuradio/branches/developers/eb/mp-sched/gnuradio-examples/python/mp-sched/wfm_rcv_pll_to_wav.py
    2008-05-20 02:34:13 UTC (rev 8455)
@@ -0,0 +1,127 @@
+#!/usr/bin/env python
+#
+# Copyright 2005,2006,2007 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+from gnuradio import gr, gru, eng_notation, optfir
+from gnuradio import audio
+from gnuradio import blks2
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import sys
+import math
+
+class wfm_rx_block (gr.top_block):
+    def __init__(self):
+        gr.top_block.__init__(self)
+
+        usage = "usage: %prog [options] input-samples-320kS.dat output.wav"
+        parser=OptionParser(option_class=eng_option, usage=usage)
+        parser.add_option("-V", "--volume", type="eng_float", default=None,
+                          help="set volume (default is midpoint)")
+
+        (options, args) = parser.parse_args()
+        if len(args) != 2:
+            parser.print_help()
+            sys.exit(1)
+        
+        input_filename = args[0]
+        output_filename = args[1]
+
+        self.vol = 0
+        
+        # build graph
+        
+        self.src = gr.file_source(gr.sizeof_gr_complex, input_filename, False)
+
+        adc_rate = 64e6                             # 64 MS/s
+        usrp_decim = 200
+        usrp_rate = adc_rate / usrp_decim           # 320 kS/s
+        chanfilt_decim = 1
+        demod_rate = usrp_rate / chanfilt_decim
+        audio_decimation = 10
+        audio_rate = demod_rate / audio_decimation  # 32 kHz
+
+
+        chan_filt_coeffs = optfir.low_pass (1,           # gain
+                                            usrp_rate,   # sampling rate
+                                            80e3,        # passband cutoff
+                                            115e3,       # stopband cutoff
+                                            0.1,         # passband ripple
+                                            60)          # stopband attenuation
+        #print len(chan_filt_coeffs)
+        chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
+
+
+        #self.guts = blks2.wfm_rcv (demod_rate, audio_decimation)
+        self.guts = blks2.wfm_rcv_pll (demod_rate, audio_decimation)
+
+        # FIXME rework {add,multiply}_const_* to handle multiple streams
+        self.volume_control_l = gr.multiply_const_ff(self.vol)
+        self.volume_control_r = gr.multiply_const_ff(self.vol)
+
+        # wave file as final sink
+        if 1:
+            sink = gr.wavfile_sink(output_filename, 2, int(audio_rate), 16)
+        else:
+            sink = audio.sink (int (audio_rate),
+                               options.audio_output,
+                               False)   # ok_to_block
+        
+        # now wire it all together
+        self.connect (self.src, chan_filt, self.guts)
+        self.connect ((self.guts, 0), self.volume_control_l, (sink, 0))
+        self.connect ((self.guts, 1), self.volume_control_r, (sink, 1))
+        try:
+          self.guts.stereo_carrier_pll_recovery.squelch_enable(True)
+        except:
+          pass
+          #print "FYI: This implementation of the stereo_carrier_pll_recovery 
has no squelch implementation yet"
+
+        if options.volume is None:
+            g = self.volume_range()
+            options.volume = float(g[0]+g[1])/2
+
+        # set initial values
+
+        self.set_vol(options.volume)
+        try:
+          
self.guts.stereo_carrier_pll_recovery.set_lock_threshold(options.squelch)
+        except:
+          pass
+          #print "FYI: This implementation of the stereo_carrier_pll_recovery 
has no squelch implementation yet"
+
+
+    def set_vol (self, vol):
+        g = self.volume_range()
+        self.vol = max(g[0], min(g[1], vol))
+        self.volume_control_l.set_k(10**(self.vol/10))
+        self.volume_control_r.set_k(10**(self.vol/10))
+
+    def volume_range(self):
+        return (-20.0, 0.0, 0.5)
+        
+
+if __name__ == '__main__':
+    tb = wfm_rx_block()
+    try:
+        tb.run()
+    except KeyboardInterrupt:
+        pass