1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
#
# Copyright 2008 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.
#
##################################################
# Imports
##################################################
import fft_window
import common
from gnuradio import gr, blks2
from pubsub import pubsub
from constants import *
##################################################
# FFT sink block (wrapper for old wxgui)
##################################################
class _fft_sink_base(gr.hier_block2, common.wxgui_hb):
"""
An fft block with real/complex inputs and a gui window.
"""
def __init__(
self,
parent,
baseband_freq=0,
ref_scale=2.0,
y_per_div=10,
y_divs=8,
ref_level=50,
sample_rate=1,
fft_size=512,
fft_rate=fft_window.DEFAULT_FRAME_RATE,
average=False,
avg_alpha=None,
title='',
size=fft_window.DEFAULT_WIN_SIZE,
peak_hold=False,
):
#ensure avg alpha
if avg_alpha is None: avg_alpha = 2.0/fft_rate
#init
gr.hier_block2.__init__(
self,
"fft_sink",
gr.io_signature(1, 1, self._item_size),
gr.io_signature(0, 0, 0),
)
#blocks
fft = self._fft_chain(
sample_rate=sample_rate,
fft_size=fft_size,
frame_rate=fft_rate,
ref_scale=ref_scale,
avg_alpha=avg_alpha,
average=average,
)
msgq = gr.msg_queue(2)
sink = gr.message_sink(gr.sizeof_float*fft_size, msgq, True)
#controller
self.controller = pubsub()
self.controller.subscribe(AVERAGE_KEY, fft.set_average)
self.controller.publish(AVERAGE_KEY, fft.average)
self.controller.subscribe(AVG_ALPHA_KEY, fft.set_avg_alpha)
self.controller.publish(AVG_ALPHA_KEY, fft.avg_alpha)
self.controller.subscribe(SAMPLE_RATE_KEY, fft.set_sample_rate)
self.controller.publish(SAMPLE_RATE_KEY, fft.sample_rate)
#start input watcher
common.input_watcher(msgq, self.controller, MSG_KEY)
#create window
self.win = fft_window.fft_window(
parent=parent,
controller=self.controller,
size=size,
title=title,
real=self._real,
fft_size=fft_size,
baseband_freq=baseband_freq,
sample_rate_key=SAMPLE_RATE_KEY,
y_per_div=y_per_div,
y_divs=y_divs,
ref_level=ref_level,
average_key=AVERAGE_KEY,
avg_alpha_key=AVG_ALPHA_KEY,
peak_hold=peak_hold,
msg_key=MSG_KEY,
)
common.register_access_methods(self, self.win)
setattr(self.win, 'set_baseband_freq', getattr(self, 'set_baseband_freq')) #BACKWARDS
setattr(self.win, 'set_peak_hold', getattr(self, 'set_peak_hold')) #BACKWARDS
#connect
self.wxgui_connect(self, fft, sink)
class fft_sink_f(_fft_sink_base):
_fft_chain = blks2.logpwrfft_f
_item_size = gr.sizeof_float
_real = True
class fft_sink_c(_fft_sink_base):
_fft_chain = blks2.logpwrfft_c
_item_size = gr.sizeof_gr_complex
_real = False
# ----------------------------------------------------------------
# Standalone test app
# ----------------------------------------------------------------
import wx
from gnuradio.wxgui import stdgui2
class test_app_block (stdgui2.std_top_block):
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
fft_size = 256
# build our flow graph
input_rate = 20.48e3
# Generate a complex sinusoid
#src1 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 2e3, 1)
src1 = gr.sig_source_c (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1)
# We add these throttle blocks so that this demo doesn't
# suck down all the CPU available. Normally you wouldn't use these.
thr1 = gr.throttle(gr.sizeof_gr_complex, input_rate)
sink1 = fft_sink_c (panel, title="Complex Data", fft_size=fft_size,
sample_rate=input_rate, baseband_freq=100e3,
ref_level=0, y_per_div=20, y_divs=10)
vbox.Add (sink1.win, 1, wx.EXPAND)
self.connect(src1, thr1, sink1)
#src2 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 2e3, 1)
src2 = gr.sig_source_f (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1)
thr2 = gr.throttle(gr.sizeof_float, input_rate)
sink2 = fft_sink_f (panel, title="Real Data", fft_size=fft_size*2,
sample_rate=input_rate, baseband_freq=100e3,
ref_level=0, y_per_div=20, y_divs=10)
vbox.Add (sink2.win, 1, wx.EXPAND)
self.connect(src2, thr2, sink2)
def main ():
app = stdgui2.stdapp (test_app_block, "FFT Sink Test App")
app.MainLoop ()
if __name__ == '__main__':
main ()
|
