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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                 lpf = gr.single_pole_iir_filter_ff(0.0)
  46                 sub = gr.sub_ff()
  47                 mute = gr.mute_ff()
  48                 #connect
  49                 self.connect(self, sub, self)
  50                 self.connect(self, lpf, mute, (sub, 1))
  51                 #subscribe
  52                 controller.subscribe(ac_couple_key, lambda x: mute.set_mute(not x))
  53                 controller.subscribe(sample_rate_key, lambda x: lpf.set_taps(2.0/x))
  54                 #initialize
  55                 controller[ac_couple_key] = ac_couple
  56                 controller[sample_rate_key] = controller[sample_rate_key]
  57
  58 ##################################################
  59 # Scope sink block (wrapper for old wxgui)
  60 ##################################################
  61 class _scope_sink_base(gr.hier_block2):
  62         """
  63         A scope block with a gui window.
  64         """
  65
  66         def __init__(
  67                 self,
  68                 parent,
  69                 title='',
  70                 sample_rate=1,
  71                 size=scope_window.DEFAULT_WIN_SIZE,
  72                 v_scale=0,
  73                 t_scale=0,
  74                 xy_mode=False,
  75                 ac_couple=False,
  76                 num_inputs=1,
  77                 frame_rate=scope_window.DEFAULT_FRAME_RATE,
  78                 **kwargs #do not end with a comma
  79         ):
  80                 if not t_scale: t_scale = 10.0/sample_rate
  81                 #init
  82                 gr.hier_block2.__init__(
  83                         self,
  84                         "scope_sink",
  85                         gr.io_signature(num_inputs, num_inputs, self._item_size),
  86                         gr.io_signature(0, 0, 0),
  87                 )
  88                 #scope
  89                 msgq = gr.msg_queue(2)
  90                 scope = gr.oscope_sink_f(sample_rate, msgq)
  91                 #controller
  92                 self.controller = pubsub()
  93                 self.controller.subscribe(SAMPLE_RATE_KEY, scope.set_sample_rate)
  94                 self.controller.publish(SAMPLE_RATE_KEY, scope.sample_rate)
  95                 self.controller.subscribe(DECIMATION_KEY, scope.set_decimation_count)
  96                 self.controller.publish(DECIMATION_KEY, scope.get_decimation_count)
  97                 self.controller.subscribe(TRIGGER_LEVEL_KEY, scope.set_trigger_level)
  98                 self.controller.publish(TRIGGER_LEVEL_KEY, scope.get_trigger_level)
  99                 self.controller.subscribe(TRIGGER_MODE_KEY, scope.set_trigger_mode)
 100                 self.controller.publish(TRIGGER_MODE_KEY, scope.get_trigger_mode)
 101                 self.controller.subscribe(TRIGGER_SLOPE_KEY, scope.set_trigger_slope)
 102                 self.controller.publish(TRIGGER_SLOPE_KEY, scope.get_trigger_slope)
 103                 self.controller.subscribe(TRIGGER_CHANNEL_KEY, scope.set_trigger_channel)
 104                 self.controller.publish(TRIGGER_CHANNEL_KEY, scope.get_trigger_channel)
 105                 #connect
 106                 if self._real:
 107                         for i in range(num_inputs):
 108                                 self.connect(
 109                                         (self, i),
 110                                         ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, i), ac_couple, SAMPLE_RATE_KEY),
 111                                         (scope, i),
 112                                 )
 113                 else:
 114                         for i in range(num_inputs):
 115                                 c2f = gr.complex_to_float()
 116                                 self.connect((self, i), c2f)
 117                                 for j in range(2):
 118                                         self.connect(
 119                                                 (c2f, j),
 120                                                 ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, 2*i+j), ac_couple, SAMPLE_RATE_KEY),
 121                                                 (scope, 2*i+j),
 122                                         )
 123                         num_inputs *= 2
 124                 #start input watcher
 125                 common.input_watcher(msgq, self.controller, MSG_KEY)
 126                 #create window
 127                 self.win = scope_window.scope_window(
 128                         parent=parent,
 129                         controller=self.controller,
 130                         size=size,
 131                         title=title,
 132                         frame_rate=frame_rate,
 133                         num_inputs=num_inputs,
 134                         sample_rate_key=SAMPLE_RATE_KEY,
 135                         t_scale=t_scale,
 136                         v_scale=v_scale,
 137                         xy_mode=xy_mode,
 138                         ac_couple_key=AC_COUPLE_KEY,
 139                         trigger_level_key=TRIGGER_LEVEL_KEY,
 140                         trigger_mode_key=TRIGGER_MODE_KEY,
 141                         trigger_slope_key=TRIGGER_SLOPE_KEY,
 142                         trigger_channel_key=TRIGGER_CHANNEL_KEY,
 143                         decimation_key=DECIMATION_KEY,
 144                         msg_key=MSG_KEY,
 145                 )
 146                 common.register_access_methods(self, self.win)
 147
 148 class scope_sink_f(_scope_sink_base):
 149         _item_size = gr.sizeof_float
 150         _real = True
 151
 152 class scope_sink_c(_scope_sink_base):
 153         _item_size = gr.sizeof_gr_complex
 154         _real = False
 155
 156 # ----------------------------------------------------------------
 157 # Stand-alone test application
 158 # ----------------------------------------------------------------
 159
 160 import wx
 161 from gnuradio.wxgui import stdgui2
 162
 163 class test_top_block (stdgui2.std_top_block):
 164     def __init__(self, frame, panel, vbox, argv):
 165         stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
 166
 167         if len(argv) > 1:
 168             frame_decim = int(argv[1])
 169         else:
 170             frame_decim = 1
 171
 172         if len(argv) > 2:
 173             v_scale = float(argv[2])  # start up at this v_scale value
 174         else:
 175             v_scale = None  # start up in autorange mode, default
 176
 177         if len(argv) > 3:
 178             t_scale = float(argv[3])  # start up at this t_scale value
 179         else:
 180             t_scale = .00003  # old behavior
 181
 182         print "frame decim %s  v_scale %s  t_scale %s" % (frame_decim,v_scale,t_scale)
 183
 184         input_rate = 1e6
 185
 186         # Generate a complex sinusoid
 187         self.src0 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 25.1e3, 1e3)
 188
 189         # We add this throttle block so that this demo doesn't suck down
 190         # all the CPU available.  You normally wouldn't use it...
 191         self.thr = gr.throttle(gr.sizeof_gr_complex, input_rate)
 192
 193         scope = scope_sink_c (panel,"Secret Data",sample_rate=input_rate,
 194                               v_scale=v_scale, t_scale=t_scale)
 195         vbox.Add (scope.win, 1, wx.EXPAND)
 196
 197         # Ultimately this will be
 198         # self.connect("src0 throttle scope")
 199         self.connect(self.src0, self.thr, scope)
 200
 201 def main ():
 202     app = stdgui2.stdapp (test_top_block, "O'Scope Test App")
 203     app.MainLoop ()
 204
 205 if __name__ == '__main__':
 206     main ()