return self.channels[self.sc.channel_name]
def create_arb_waveform(self, waveform):
"""
waveform is a numpy array, with values normalized between 0 and 1.
Returns the integer handle of the created waveform.
"""
waveform = array(waveform)
if waveform.dtype != double:
waveform = waveform.astype(dtype=double, casting='safe')
length = len(waveform)
c_array = ctypes.c_double * length
c_array = c_array.from_buffer(waveform.data)
handle = ctypes.c_int()
self.call('CreateArbWaveform', self.visession, length, c_array,
ctypes.byref(handle))
return handle.value
def get_channel_name(self, ch_index):
name = ctypes.create_string_buffer(256)
self.call("GetChannelName", self.visession, ch_index, 256, name)
return name.value
add_repeated_capability(IviCFGen, 'Channel', ChannelFgen)
add_props(IviCFGen)
def create_arb_waveform(self, waveform):
"""
waveform is a numpy array, with values normalized between 0 and 1.
Returns the integer handle of the created waveform.
"""
waveform = array(waveform)
if waveform.dtype != double:
waveform = waveform.astype(dtype=double, casting='safe')
length = len(waveform)
c_array = ctypes.c_double*length
c_array = c_array.from_buffer(waveform.data)
handle = ctypes.c_int()
self.call('CreateArbWaveform',
self.visession,
length,
c_array,
ctypes.byref(handle))
return handle.value
def get_channel_name(self, ch_index):
name = ctypes.create_string_buffer(256)
self.call("GetChannelName", self.visession, ch_index, 256, name)
return name.value
add_repeated_capability(IviCFGen, 'Channel', ChannelFgen)
add_props(IviCFGen)
return numpy_x, numpy_y
def fetch_waveform(self, channel=None):
"""
Channel must be specified as a string
"""
if not channel:
channel = self.channels.keys()[0]
chan = ctypes.c_char_p(channel)
py_len = self.horz_record_length
length = ctypes.c_int(py_len)
arr = ctypes.c_double * py_len
data = zeros(py_len, dtype=double)
arr = arr.from_buffer_copy(data.data)
actual_length = ctypes.c_int()
initial_x = ctypes.c_double()
x_increment = ctypes.c_double()
self.call('FetchWaveform', self.visession, chan, length, arr,
ctypes.byref(actual_length), ctypes.byref(initial_x),
ctypes.byref(x_increment))
numpy_y = frombuffer(arr, dtype=double)
numpy_x = linspace(initial_x.value, x_increment.value * py_len, py_len,
False)
return numpy_x, numpy_y
IviCScope._new_attr('channel_count', IVI_ATTR_CHANNEL_COUNT, 'ViInt32', False,
False, True)
add_repeated_capability(IviCScope, 'Channel', ChannelScope)
add_props(IviCScope)
numpy_y = frombuffer(arr, dtype=double)
return numpy_y
def read_y_trace(self, trace_name=None, timeout_ms=10000):
"""
Same as fetch_waveform, but also initializes an acquisition
"""
if not trace_name:
trace_name = list(self.traces.keys())[0]
trace_name_c = ctypes.c_char_p(trace_name)
trace = self.traces[trace_name]
timeout_ms_c = ctypes.c_int32(timeout_ms)
py_len = trace.trace_size
length = ctypes.c_int(py_len)
arr = ctypes.c_double * py_len
data = zeros(py_len, dtype=double)
arr = arr.from_buffer_copy(data.data)
actual_length = ctypes.c_int()
initial_x = ctypes.c_double()
x_increment = ctypes.c_double()
self.call('ReadYTrace', self.visession, trace_name_c, timeout_ms_c,
length, ctypes.byref(actual_length), arr)
numpy_y = frombuffer(arr, dtype=double)
return numpy_y
IviCSpecAn._new_attr('trace_count', IVI_CLASS_PUBLIC_ATTR_BASE + 18, 'ViInt32',
False, False, False)
add_repeated_capability(IviCSpecAn, 'Trace', TraceSpecAn)
add_props(IviCSpecAn)
def fetch_waveform(self, channel=None):
"""
Channel must be specified as a string
"""
if not channel:
channel = self.channels.keys()[0]
chan = ctypes.c_char_p(channel)
py_len = self.horz_record_length
length = ctypes.c_int(py_len)
arr = ctypes.c_double*py_len
data = zeros(py_len, dtype = double)
arr = arr.from_buffer_copy(data.data)
actual_length = ctypes.c_int()
initial_x = ctypes.c_double()
x_increment = ctypes.c_double()
self.call('FetchWaveform',
self.visession,
chan,
length,
arr,
ctypes.byref(actual_length),
ctypes.byref(initial_x),
ctypes.byref(x_increment))
numpy_y = frombuffer(arr, dtype = double)
numpy_x = linspace(initial_x.value, x_increment.value*py_len, py_len, False)
return numpy_x, numpy_y
IviCScope._new_attr('channel_count', IVI_ATTR_CHANNEL_COUNT,'ViInt32',False,False,True)
add_repeated_capability(IviCScope, 'Channel', ChannelScope)
add_props(IviCScope)
"""
Same as fetch_waveform, but also initializes an acquisition
"""
if not trace_name:
trace_name = self.traces.keys()[0]
trace_name_c = ctypes.c_char_p(trace_name)
trace = self.traces[trace_name]
timeout_ms_c = ctypes.c_int32(timeout_ms)
py_len = trace.trace_size
length = ctypes.c_int(py_len)
arr = ctypes.c_double*py_len
data = zeros(py_len, dtype = double)
arr = arr.from_buffer_copy(data.data)
actual_length = ctypes.c_int()
initial_x = ctypes.c_double()
x_increment = ctypes.c_double()
self.call('ReadYTrace',
self.visession,
trace_name_c,
timeout_ms_c,
length,
ctypes.byref(actual_length),
arr)
numpy_y = frombuffer(arr, dtype = double)
return numpy_y
IviCSpecAn._new_attr('trace_count', IVI_CLASS_PUBLIC_ATTR_BASE + 18L ,'ViInt32',False,False,False)
add_repeated_capability(IviCSpecAn, 'Trace', TraceSpecAn)
add_props(IviCSpecAn)
