#
-# Copyright 2008 Free Software Foundation, Inc.
+# Copyright 2008,2010 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
from gnuradio import gr
from pubsub import pubsub
from constants import *
+import math
class ac_couple_block(gr.hier_block2):
"""
Mute the low pass filter to disable ac coupling.
"""
- def __init__(self, controller, ac_couple_key, ac_couple, sample_rate_key):
+ def __init__(self, controller, ac_couple_key, sample_rate_key):
gr.hier_block2.__init__(
self,
"ac_couple",
self.connect(self, lpf, mute, (sub, 1))
#subscribe
controller.subscribe(ac_couple_key, lambda x: mute.set_mute(not x))
- controller.subscribe(sample_rate_key, lambda x: lpf.set_taps(2.0/x))
+ controller.subscribe(sample_rate_key, lambda x: lpf.set_taps(0.05))
#initialize
- controller[ac_couple_key] = ac_couple
+ controller[ac_couple_key] = controller[ac_couple_key]
controller[sample_rate_key] = controller[sample_rate_key]
##################################################
# Scope sink block (wrapper for old wxgui)
##################################################
-class _scope_sink_base(gr.hier_block2):
+class _scope_sink_base(gr.hier_block2, common.wxgui_hb):
"""
A scope block with a gui window.
"""
size=scope_window.DEFAULT_WIN_SIZE,
v_scale=0,
t_scale=0,
+ v_offset=0,
xy_mode=False,
ac_couple=False,
num_inputs=1,
frame_rate=scope_window.DEFAULT_FRAME_RATE,
+ use_persistence=False,
+ persist_alpha=None,
**kwargs #do not end with a comma
):
+ #ensure analog alpha
+ if persist_alpha is None:
+ actual_frame_rate=float(frame_rate)
+ analog_cutoff_freq=0.5 # Hertz
+ #calculate alpha from wanted cutoff freq
+ persist_alpha = 1.0 - math.exp(-2.0*math.pi*analog_cutoff_freq/actual_frame_rate)
+
if not t_scale: t_scale = 10.0/sample_rate
#init
gr.hier_block2.__init__(
self.controller.publish(TRIGGER_SLOPE_KEY, scope.get_trigger_slope)
self.controller.subscribe(TRIGGER_CHANNEL_KEY, scope.set_trigger_channel)
self.controller.publish(TRIGGER_CHANNEL_KEY, scope.get_trigger_channel)
- #connect
- if self._real:
- for i in range(num_inputs):
- self.connect(
- (self, i),
- ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, i), ac_couple, SAMPLE_RATE_KEY),
- (scope, i),
- )
- else:
- for i in range(num_inputs):
- c2f = gr.complex_to_float()
- self.connect((self, i), c2f)
- for j in range(2):
- self.connect(
- (c2f, j),
- ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, 2*i+j), ac_couple, SAMPLE_RATE_KEY),
- (scope, 2*i+j),
- )
- num_inputs *= 2
+ actual_num_inputs = self._real and num_inputs or num_inputs*2
+ #init ac couple
+ for i in range(actual_num_inputs):
+ self.controller[common.index_key(AC_COUPLE_KEY, i)] = ac_couple
#start input watcher
common.input_watcher(msgq, self.controller, MSG_KEY)
#create window
size=size,
title=title,
frame_rate=frame_rate,
- num_inputs=num_inputs,
+ num_inputs=actual_num_inputs,
sample_rate_key=SAMPLE_RATE_KEY,
t_scale=t_scale,
v_scale=v_scale,
+ v_offset=v_offset,
xy_mode=xy_mode,
ac_couple_key=AC_COUPLE_KEY,
trigger_level_key=TRIGGER_LEVEL_KEY,
trigger_channel_key=TRIGGER_CHANNEL_KEY,
decimation_key=DECIMATION_KEY,
msg_key=MSG_KEY,
+ use_persistence=use_persistence,
+ persist_alpha=persist_alpha,
)
common.register_access_methods(self, self.win)
+ #connect
+ if self._real:
+ for i in range(num_inputs):
+ self.wxgui_connect(
+ (self, i),
+ ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, i), SAMPLE_RATE_KEY),
+ (scope, i),
+ )
+ else:
+ for i in range(num_inputs):
+ c2f = gr.complex_to_float()
+ self.wxgui_connect((self, i), c2f)
+ for j in range(2):
+ self.connect(
+ (c2f, j),
+ ac_couple_block(self.controller, common.index_key(AC_COUPLE_KEY, 2*i+j), SAMPLE_RATE_KEY),
+ (scope, 2*i+j),
+ )
class scope_sink_f(_scope_sink_base):
_item_size = gr.sizeof_float
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
+ default_input_rate = 1e6
if len(argv) > 1:
- frame_decim = int(argv[1])
+ input_rate = int(argv[1])
else:
- frame_decim = 1
+ input_rate = default_input_rate
if len(argv) > 2:
v_scale = float(argv[2]) # start up at this v_scale value
if len(argv) > 3:
t_scale = float(argv[3]) # start up at this t_scale value
else:
- t_scale = .00003 # old behavior
+ t_scale = .00003*default_input_rate/input_rate # old behavior
- print "frame decim %s v_scale %s t_scale %s" % (frame_decim,v_scale,t_scale)
+ print "input rate %s v_scale %s t_scale %s" % (input_rate,v_scale,t_scale)
- input_rate = 1e6
# Generate a complex sinusoid
- self.src0 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 25.1e3, 1e3)
+ ampl=1.0e3
+ self.src0 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 25.1e3*input_rate/default_input_rate, ampl)
+ self.noise =gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 11.1*25.1e3*input_rate/default_input_rate, ampl/10)
+ #self.noise =gr.noise_source_c(gr.GR_GAUSSIAN, ampl/10)
+ self.combine=gr.add_cc()
# We add this throttle block so that this demo doesn't suck down
# all the CPU available. You normally wouldn't use it...
# Ultimately this will be
# self.connect("src0 throttle scope")
- self.connect(self.src0, self.thr, scope)
+ self.connect(self.src0,(self.combine,0))
+ self.connect(self.noise,(self.combine,1))
+ self.connect(self.combine, self.thr, scope)
def main ():
app = stdgui2.stdapp (test_top_block, "O'Scope Test App")
projects / debian / gnuradio / blobdiff