def _on_incr_dynamic_range(self, event):
self.parent[DYNAMIC_RANGE_KEY] = min(MAX_DYNAMIC_RANGE, common.get_clean_incr(self.parent[DYNAMIC_RANGE_KEY]))
def _on_incr_db_div(self, event):
self.parent[constants.Y_PER_DIV_KEY] = min(DB_DIV_MAX, common.get_clean_incr(self.parent[constants.Y_PER_DIV_KEY]))
def handle_samples(self):
"""
Handle the cached samples from the scope input.
Perform ac coupling, triggering, and auto ranging.
"""
if not self.sampleses: return
sampleses = self.sampleses
#if self[XY_MODE_KEY]:
if True:
self[DECIMATION_KEY] = 1
x_samples = sampleses[self[X_CHANNEL_KEY]]
y_samples = sampleses[self[Y_CHANNEL_KEY]]
z_samples = sampleses[2]
#autorange
if self[AUTORANGE_KEY] and time.time(
) - self.autorange_ts > AUTORANGE_UPDATE_RATE:
x_min, x_max = common.get_min_max(x_samples)
y_min, y_max = common.get_min_max(y_samples)
#adjust the x per div
x_per_div = common.get_clean_num(
(x_max - x_min) / self[X_DIVS_KEY])
if x_per_div != self[X_PER_DIV_KEY]:
self[X_PER_DIV_KEY] = x_per_div
return
#adjust the x offset
x_off = x_per_div * round((x_max + x_min) / 2 / x_per_div)
if x_off != self[X_OFF_KEY]:
self[X_OFF_KEY] = x_off
return
#adjust the y per div
y_per_div = common.get_clean_num(
(y_max - y_min) / self[Y_DIVS_KEY])
if y_per_div != self[Y_PER_DIV_KEY]:
self[Y_PER_DIV_KEY] = y_per_div
return
#adjust the y offset
y_off = y_per_div * round((y_max + y_min) / 2 / y_per_div)
if y_off != self[Y_OFF_KEY]:
self[Y_OFF_KEY] = y_off
return
self.autorange_ts = time.time()
#plot xy channel
self.plotter.set_waveform(
channel='XY',
samples=(x_samples, y_samples, z_samples),
color_spec=CHANNEL_COLOR_SPECS[0],
marker=self[XY_MARKER_KEY],
)
#turn off each waveform
for i, samples in enumerate(sampleses):
self.plotter.clear_waveform(channel='Ch%d' % (i + 1))
else:
#autorange
if self[AUTORANGE_KEY] and time.time(
) - self.autorange_ts > AUTORANGE_UPDATE_RATE:
bounds = [common.get_min_max(samples) for samples in sampleses]
y_min = numpy.min([bound[0] for bound in bounds])
y_max = numpy.max([bound[1] for bound in bounds])
#adjust the y per div
y_per_div = common.get_clean_num(
(y_max - y_min) / self[Y_DIVS_KEY])
if y_per_div != self[Y_PER_DIV_KEY]:
self[Y_PER_DIV_KEY] = y_per_div
return
#adjust the y offset
y_off = y_per_div * round((y_max + y_min) / 2 / y_per_div)
if y_off != self[Y_OFF_KEY]:
self[Y_OFF_KEY] = y_off
return
self.autorange_ts = time.time()
#number of samples to scale to the screen
actual_rate = self.get_actual_rate()
time_span = self[T_PER_DIV_KEY] * self[T_DIVS_KEY]
num_samps = int(round(time_span * actual_rate))
#handle the time offset
t_off = self[T_FRAC_OFF_KEY] * (len(sampleses[0]) / actual_rate -
time_span)
if t_off != self[T_OFF_KEY]:
self[T_OFF_KEY] = t_off
return
samps_off = int(round(actual_rate * self[T_OFF_KEY]))
#adjust the decim so that we use about half the samps
self[DECIMATION_KEY] = int(
round(time_span * self[SAMPLE_RATE_KEY] /
(0.5 * len(sampleses[0]))))
#num samps too small, auto increment the time
if num_samps < 2:
self[T_PER_DIV_KEY] = common.get_clean_incr(
self[T_PER_DIV_KEY])
#num samps in bounds, plot each waveform
elif num_samps <= len(sampleses[0]):
for i, samples in enumerate(sampleses):
#plot samples
self.plotter.set_waveform(
channel='Ch%d' % (i + 1),
samples=samples[samps_off:num_samps + samps_off],
color_spec=CHANNEL_COLOR_SPECS[i],
marker=self[common.index_key(MARKER_KEY, i)],
trig_off=self.trigger_offset,
)
#turn XY channel off
self.plotter.clear_waveform(channel='XY')
#keep trigger level within range
if self[TRIGGER_LEVEL_KEY] > self.get_y_max():
self[TRIGGER_LEVEL_KEY] = self.get_y_max()
return
if self[TRIGGER_LEVEL_KEY] < self.get_y_min():
self[TRIGGER_LEVEL_KEY] = self.get_y_min()
return
#disable the trigger channel
if not self[TRIGGER_SHOW_KEY] or self[XY_MODE_KEY] or self[
TRIGGER_MODE_KEY] == wxgui.TRIG_MODE_FREE:
self.plotter.clear_waveform(channel='Trig')
else: #show trigger channel
trigger_level = self[TRIGGER_LEVEL_KEY]
trigger_point = (len(self.sampleses[0]) -
1) / self.get_actual_rate() / 2.0
self.plotter.set_waveform(
channel='Trig',
samples=([
self.get_t_min(), trigger_point, trigger_point,
trigger_point, trigger_point,
self.get_t_max()
], [
trigger_level, trigger_level,
self.get_y_max(),
self.get_y_min(), trigger_level, trigger_level
]),
color_spec=TRIGGER_COLOR_SPEC,
)
#update the plotter
self.plotter.update()
def _on_incr_dynamic_range(self, event):
self.parent[DYNAMIC_RANGE_KEY] = min(
MAX_DYNAMIC_RANGE,
common.get_clean_incr(self.parent[DYNAMIC_RANGE_KEY]))
def handle_samples(self):
"""
Handle the cached samples from the scope input.
Perform ac coupling, triggering, and auto ranging.
"""
if not self.sampleses: return
sampleses = self.sampleses
#if self[XY_MODE_KEY]:
if True:
self[DECIMATION_KEY] = 1
x_samples = sampleses[self[X_CHANNEL_KEY]]
y_samples = sampleses[self[Y_CHANNEL_KEY]]
z_samples = sampleses[2]
#autorange
if self[AUTORANGE_KEY] and time.time() - self.autorange_ts > AUTORANGE_UPDATE_RATE:
x_min, x_max = common.get_min_max(x_samples)
y_min, y_max = common.get_min_max(y_samples)
#adjust the x per div
x_per_div = common.get_clean_num((x_max-x_min)/self[X_DIVS_KEY])
if x_per_div != self[X_PER_DIV_KEY]: self[X_PER_DIV_KEY] = x_per_div; return
#adjust the x offset
x_off = x_per_div*round((x_max+x_min)/2/x_per_div)
if x_off != self[X_OFF_KEY]: self[X_OFF_KEY] = x_off; return
#adjust the y per div
y_per_div = common.get_clean_num((y_max-y_min)/self[Y_DIVS_KEY])
if y_per_div != self[Y_PER_DIV_KEY]: self[Y_PER_DIV_KEY] = y_per_div; return
#adjust the y offset
y_off = y_per_div*round((y_max+y_min)/2/y_per_div)
if y_off != self[Y_OFF_KEY]: self[Y_OFF_KEY] = y_off; return
self.autorange_ts = time.time()
#plot xy channel
self.plotter.set_waveform(
channel='XY',
samples=(x_samples, y_samples, z_samples),
color_spec=CHANNEL_COLOR_SPECS[0],
marker=self[XY_MARKER_KEY],
)
#turn off each waveform
for i, samples in enumerate(sampleses):
self.plotter.clear_waveform(channel='Ch%d'%(i+1))
else:
#autorange
if self[AUTORANGE_KEY] and time.time() - self.autorange_ts > AUTORANGE_UPDATE_RATE:
bounds = [common.get_min_max(samples) for samples in sampleses]
y_min = numpy.min([bound[0] for bound in bounds])
y_max = numpy.max([bound[1] for bound in bounds])
#adjust the y per div
y_per_div = common.get_clean_num((y_max-y_min)/self[Y_DIVS_KEY])
if y_per_div != self[Y_PER_DIV_KEY]: self[Y_PER_DIV_KEY] = y_per_div; return
#adjust the y offset
y_off = y_per_div*round((y_max+y_min)/2/y_per_div)
if y_off != self[Y_OFF_KEY]: self[Y_OFF_KEY] = y_off; return
self.autorange_ts = time.time()
#number of samples to scale to the screen
actual_rate = self.get_actual_rate()
time_span = self[T_PER_DIV_KEY]*self[T_DIVS_KEY]
num_samps = int(round(time_span*actual_rate))
#handle the time offset
t_off = self[T_FRAC_OFF_KEY]*(len(sampleses[0])/actual_rate - time_span)
if t_off != self[T_OFF_KEY]: self[T_OFF_KEY] = t_off; return
samps_off = int(round(actual_rate*self[T_OFF_KEY]))
#adjust the decim so that we use about half the samps
self[DECIMATION_KEY] = int(round(
time_span*self[SAMPLE_RATE_KEY]/(0.5*len(sampleses[0]))
)
)
#num samps too small, auto increment the time
if num_samps < 2: self[T_PER_DIV_KEY] = common.get_clean_incr(self[T_PER_DIV_KEY])
#num samps in bounds, plot each waveform
elif num_samps <= len(sampleses[0]):
for i, samples in enumerate(sampleses):
#plot samples
self.plotter.set_waveform(
channel='Ch%d'%(i+1),
samples=samples[samps_off:num_samps+samps_off],
color_spec=CHANNEL_COLOR_SPECS[i],
marker=self[common.index_key(MARKER_KEY, i)],
trig_off=self.trigger_offset,
)
#turn XY channel off
self.plotter.clear_waveform(channel='XY')
#keep trigger level within range
if self[TRIGGER_LEVEL_KEY] > self.get_y_max():
self[TRIGGER_LEVEL_KEY] = self.get_y_max(); return
if self[TRIGGER_LEVEL_KEY] < self.get_y_min():
self[TRIGGER_LEVEL_KEY] = self.get_y_min(); return
#disable the trigger channel
if not self[TRIGGER_SHOW_KEY] or self[XY_MODE_KEY] or self[TRIGGER_MODE_KEY] == wxgui.TRIG_MODE_FREE:
self.plotter.clear_waveform(channel='Trig')
else: #show trigger channel
trigger_level = self[TRIGGER_LEVEL_KEY]
trigger_point = (len(self.sampleses[0])-1)/self.get_actual_rate()/2.0
self.plotter.set_waveform(
channel='Trig',
samples=(
[self.get_t_min(), trigger_point, trigger_point, trigger_point, trigger_point, self.get_t_max()],
[trigger_level, trigger_level, self.get_y_max(), self.get_y_min(), trigger_level, trigger_level]
),
color_spec=TRIGGER_COLOR_SPEC,
)
#update the plotter
self.plotter.update()
