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   1 #
   2 # Copyright 2008 Free Software Foundation, Inc.
   3 #
   4 # This file is part of GNU Radio
   5 #
   6 # GNU Radio is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3, or (at your option)
   9 # any later version.
  10 #
  11 # GNU Radio is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with GNU Radio; see the file COPYING.  If not, write to
  18 # the Free Software Foundation, Inc., 51 Franklin Street,
  19 # Boston, MA 02110-1301, USA.
  20 #
  21
  22 ##################################################
  23 # Imports
  24 ##################################################
  25 import scope_window
  26 import common
  27 from gnuradio import gr
  28 from pubsub import pubsub
  29 from constants import *
  30
  31 class ac_couple_block(gr.hier_block2):
  32         """
  33         AC couple the incoming stream by subtracting out the low pass signal.
  34         Mute the low pass filter to disable ac coupling.
  35         """
  36
  37         def __init__(self, controller, ac_couple_key, ac_couple, sample_rate_key):
  38                 gr.hier_block2.__init__(
  39                         self,
  40                         "ac_couple",
  41                         gr.io_signature(1, 1, gr.sizeof_float),
  42                         gr.io_signature(1, 1, gr.sizeof_float),
  43                 )
  44                 #blocks
  45                 copy = gr.kludge_copy(gr.sizeof_float)
  46                 lpf = gr.single_pole_iir_filter_ff(0.0)
  47                 sub = gr.sub_ff()
  48                 mute = gr.mute_ff()
  49                 #connect
  50                 self.connect(self, copy, sub, self)
  51                 self.connect(copy, lpf, mute, (sub, 1))
  52                 #subscribe
  53                 controller.subscribe(ac_couple_key, lambda x: mute.set_mute(not x))
  54                 controller.subscribe(sample_rate_key, lambda x: lpf.set_taps(2.0/x))
  55                 #initialize
  56                 controller[ac_couple_key] = ac_couple
  57                 controller[sample_rate_key] = controller[sample_rate_key]
  58
  59 ##################################################
  60 # Scope sink block (wrapper for old wxgui)
  61 ##################################################
  62 class _scope_sink_base(gr.hier_block2):
  63         """
  64         A scope block with a gui window.
  65         """
  66
  67         def __init__(
  68                 self,
  69                 parent,
  70                 title='',
  71                 sample_rate=1,
  72                 size=scope_window.DEFAULT_WIN_SIZE,
  73                 v_scale=0,
  74                 t_scale=0,
  75                 xy_mode=False,
  76                 ac_couple=False,
  77                 num_inputs=1,
  78                 frame_rate=scope_window.DEFAULT_FRAME_RATE,
  79                 **kwargs #do not end with a comma
  80         ):
  81                 if not t_scale: t_scale = 10.0/sample_rate
  82                 #init
  83                 gr.hier_block2.__init__(
  84                         self,
  85                         "scope_sink",
  86                         gr.io_signature(num_inputs, num_inputs, self._item_size),
  87                         gr.io_signature(0, 0, 0),
  88                 )
  89                 #scope
  90                 msgq = gr.msg_queue(2)
  91                 scope = gr.oscope_sink_f(sample_rate, msgq)
  92                 #controller
  93                 self.controller = pubsub()
  94                 self.controller.subscribe(SAMPLE_RATE_KEY, scope.set_sample_rate)
  95                 self.controller.publish(SAMPLE_RATE_KEY, scope.sample_rate)
  96                 self.controller.subscribe(DECIMATION_KEY, scope.set_decimation_count)
  97                 self.controller.publish(DECIMATION_KEY, scope.get_decimation_count)
  98                 self.controller.subscribe(TRIGGER_LEVEL_KEY, scope.set_trigger_level)
  99                 self.controller.publish(TRIGGER_LEVEL_KEY, scope.get_trigger_level)
 100                 self.controller.subscribe(TRIGGER_MODE_KEY, scope.set_trigger_mode)
 101                 self.controller.publish(TRIGGER_MODE_KEY, scope.get_trigger_mode)
 102                 self.controller.subscribe(TRIGGER_SLOPE_KEY, scope.set_trigger_slope)
 103                 self.controller.publish(TRIGGER_SLOPE_KEY, scope.get_trigger_slope)
 104                 self.controller.subscribe(TRIGGER_CHANNEL_KEY, scope.set_trigger_channel)
 105                 self.controller.publish(TRIGGER_CHANNEL_KEY, scope.get_trigger_channel)
 106                 #connect
 107                 if self._real:
 108                         for i in range(num_inputs):
 109                                 self.connect(
 110                                         (self, i),
 111                                         ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, i), ac_couple, SAMPLE_RATE_KEY),
 112                                         (scope, i),
 113                                 )
 114                 else:
 115                         for i in range(num_inputs):
 116                                 c2f = gr.complex_to_float()
 117                                 self.connect((self, i), c2f)
 118                                 for j in range(2):
 119                                         self.connect(
 120                                                 (c2f, j),
 121                                                 ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, 2*i+j), ac_couple, SAMPLE_RATE_KEY),
 122                                                 (scope, 2*i+j),
 123                                         )
 124                         num_inputs *= 2
 125                 #start input watcher
 126                 common.input_watcher(msgq, self.controller, MSG_KEY)
 127                 #create window
 128                 self.win = scope_window.scope_window(
 129                         parent=parent,
 130                         controller=self.controller,
 131                         size=size,
 132                         title=title,
 133                         frame_rate=frame_rate,
 134                         num_inputs=num_inputs,
 135                         sample_rate_key=SAMPLE_RATE_KEY,
 136                         t_scale=t_scale,
 137                         v_scale=v_scale,
 138                         xy_mode=xy_mode,
 139                         ac_couple_key=AC_COUPLE_KEY,
 140                         trigger_level_key=TRIGGER_LEVEL_KEY,
 141                         trigger_mode_key=TRIGGER_MODE_KEY,
 142                         trigger_slope_key=TRIGGER_SLOPE_KEY,
 143                         trigger_channel_key=TRIGGER_CHANNEL_KEY,
 144                         decimation_key=DECIMATION_KEY,
 145                         msg_key=MSG_KEY,
 146                 )
 147                 common.register_access_methods(self, self.win)
 148
 149 class scope_sink_f(_scope_sink_base):
 150         _item_size = gr.sizeof_float
 151         _real = True
 152
 153 class scope_sink_c(_scope_sink_base):
 154         _item_size = gr.sizeof_gr_complex
 155         _real = False
 156
 157 # ----------------------------------------------------------------
 158 # Stand-alone test application
 159 # ----------------------------------------------------------------
 160
 161 import wx
 162 from gnuradio.wxgui import stdgui2
 163
 164 class test_top_block (stdgui2.std_top_block):
 165     def __init__(self, frame, panel, vbox, argv):
 166         stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
 167
 168         if len(argv) > 1:
 169             frame_decim = int(argv[1])
 170         else:
 171             frame_decim = 1
 172
 173         if len(argv) > 2:
 174             v_scale = float(argv[2])  # start up at this v_scale value
 175         else:
 176             v_scale = None  # start up in autorange mode, default
 177
 178         if len(argv) > 3:
 179             t_scale = float(argv[3])  # start up at this t_scale value
 180         else:
 181             t_scale = .00003  # old behavior
 182
 183         print "frame decim %s  v_scale %s  t_scale %s" % (frame_decim,v_scale,t_scale)
 184
 185         input_rate = 1e6
 186
 187         # Generate a complex sinusoid
 188         self.src0 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 25.1e3, 1e3)
 189
 190         # We add this throttle block so that this demo doesn't suck down
 191         # all the CPU available.  You normally wouldn't use it...
 192         self.thr = gr.throttle(gr.sizeof_gr_complex, input_rate)
 193
 194         scope = scope_sink_c (panel,"Secret Data",sample_rate=input_rate,
 195                               v_scale=v_scale, t_scale=t_scale)
 196         vbox.Add (scope.win, 1, wx.EXPAND)
 197
 198         # Ultimately this will be
 199         # self.connect("src0 throttle scope")
 200         self.connect(self.src0, self.thr, scope)
 201
 202 def main ():
 203     app = stdgui2.stdapp (test_top_block, "O'Scope Test App")
 204     app.MainLoop ()
 205
 206 if __name__ == '__main__':
 207     main ()