def block(self):
self.data_mVRay.clear()
self.time = {}
self.status["runblock"] = ps.ps5000aRunBlock(self.chandle,
self.preTriggerSamples,
self.postTriggerSamples,
self.timebase, None, 0,
None, None)
assert_pico_ok(self.status["runblock"])
ready = ctypes.c_int16(0)
check = ctypes.c_int16(0)
while ready.value == check.value:
self.status["isReady"] = ps.ps5000aIsReady(self.chandle,
ctypes.byref(ready))
self.status["GetValuesBulk"] = ps.ps5000aGetValuesBulk(
self.chandle, ctypes.byref(self.cmaxSamples), 0, self.blocks - 1,
0, 0, ctypes.byref(self.overflow))
assert_pico_ok(self.status["GetValuesBulk"])
for i in range(self.blocks):
self.data_mVRay.append(
adc2mV(self.bufferMaxRay[i], self.chARange, self.maxADC))
#self.data_mVRay.append(np.asarray(self.bufferMaxRay[i], dtype=int) * self.chARange / self.maxADC.value)
self.createTimeAxis()
def startview_single(self):
self.gr.setDisabled(True)
self.grfft.setDisabled(True)
self.numb.setDisabled(True)
self.test = QTimer()
if len(listacq) == 0:
self.test.setInterval(500)
self.test.setTimerType(Qt.PreciseTimer)
self.b = 1
self.test.timeout.connect(lambda: self.warning("No channel selected, go to Config > Select channels"))
self.test.start()
else:
self.test.stop()
self.statusBar().setStyleSheet("background-color : #5CDB95; color: #EDF5E1")
self.statusBar().showMessage('In progress...')
self.plotChan.clear()
self.plotChanData = np.arange(0)
self.timer_single = QTimer()
self.timer_single.setTimerType(Qt.PreciseTimer)
status["SetDo"] = pl.pl1000SetDo(chandle, 1, 0)
self.timer_single.timeout.connect(self.update_accel_single)
self.startplot_single.setDisabled(True)
self.startplot_single.setStyleSheet('QPushButton {background-color: #5CDB95; color: #5CDB95;}')
self.showdata_single.setDisabled(False)
self.stopplot_single.setDisabled(False)
self.stopplot_single.setStyleSheet('QPushButton {background-color: #5CDB95; color: #05386B;}')
self.usForBlock = ctypes.c_uint32(100000)
self.noOfValues = ctypes.c_uint32(10000)
channels = ctypes.c_int16(9)
status["setInterval"] = pl.pl1000SetInterval(chandle, ctypes.byref(self.usForBlock), self.noOfValues,
ctypes.byref(channels), 1)
assert_pico_ok(status["setInterval"])
self.mode = pl.PL1000_BLOCK_METHOD["BM_STREAM"]
self.timer_single.start()
def createBuffers(self):
for i in range(self.blocks):
# Create buffers ready for assigning pointers for data collection
self.bufferMaxRay[i] = (ctypes.c_int16 * self.maxsamples)()
self.bufferMinRay[i] = (ctypes.c_int16 * self.maxsamples)()
self.bufferAMax = (ctypes.c_int16 * self.maxsamples)()
self.bufferAMin = (ctypes.c_int16 * self.maxsamples)()
# Setting the data buffer location for data collection from channel A
# Handle = Chandle
self.source = ps.PS5000A_CHANNEL["PS5000A_CHANNEL_A"]
# Buffer max = ctypes.byref(bufferMaxRay[i])
# Buffer min = ctypes.byref(bufferMinRay[i])
# Buffer length = maxsamples
# Segment index = i
# Ratio mode = ps5000a_Ratio_Mode_None = 0
self.status["SetDataBuffers"] = ps.ps5000aSetDataBuffers(
self.chandle, self.source, ctypes.byref(self.bufferMaxRay[i]),
ctypes.byref(self.bufferMinRay[i]), self.maxsamples, i, 0)
assert_pico_ok(self.status["SetDataBuffers"])
# Creates a overflow location for data
self.overflow = (ctypes.c_int16 * self.blocks)()
# Creates converted types maxsamples
self.cmaxSamples = ctypes.c_int32(self.maxsamples)
def set_trigger(self,
channel_name,
threshold=0.,
direction='RISING',
is_enabled=True,
delay=0,
auto_trigger=0):
"""Set the oscilloscope trigger condition.
:param channel_name: the source channel for the trigger (e.g. 'A')
:param threshold: the trigger threshold (in V)
:param direction: the direction in which the signal must move to cause
a trigger
:param is_enabled: (boolean) enable or disable the trigger
:param delay: the delay between the trigger occuring and the start of
capturing data, in number of sample periods
:param auto_trigger: the maximum amount of time to wait for a trigger
before starting capturing data in seconds
The direction parameter can take values of 'ABOVE', 'BELOW', 'RISING',
'FALLING' or 'RISING_OR_FALLING'.
"""
channel = _get_channel_from_name(channel_name)
threshold = self._rescale_V_to_adc(channel_name, threshold)
direction = _get_trigger_direction_from_name(direction)
assert_pico_ok(
ps.ps5000aSetSimpleTrigger(self._handle, is_enabled, channel,
threshold, direction, delay,
auto_trigger))
def setSimpleTrigger(self,
channel,
threshold_mV,
direction,
delay_samples,
timeout_ms=1000):
# TODO: handling of external trigger
maxADC = ctypes.c_int16()
self.status['maximumValue'] = ps.ps5000aMaximumValue(
self.chandle, ctypes.byref(maxADC))
assert_pico_ok(self.status['maximumValue'])
if (channel.upper() == 'EXT'):
_channel = ps.PS5000A_CHANNEL['PS5000A_EXTERNAL']
_voltage_range = ps.PS5000A_RANGE['PS5000A_5V']
else:
_channel = ps.PS5000A_CHANNEL['PS5000A_CHANNEL_' + channel.upper()]
_voltage_range = ps.PS5000A_RANGE[
'PS5000A_' + self.channel_info[channel]['voltage_range']]
_threshold_ADC = int(mV2adc(threshold_mV, _voltage_range, maxADC))
_direction = ps.PS5000A_THRESHOLD_DIRECTION['PS5000A_' +
direction.upper()]
self.status["trigger"] = ps.ps5000aSetSimpleTrigger(
self.chandle, 1, _channel, _threshold_ADC, _direction,
delay_samples, timeout_ms)
assert_pico_ok(self.status["trigger"])
self.trigger_info = {
'channel': channel.upper(),
'threshold_mV': threshold_mV,
'direction': direction.upper(),
'delay_samples': delay_samples
}
def connect(self, numberOfChannels=1):
self.makeConnection()
#seuraavaksi channel asetukset omiin funktioihinsa. Mahdollisesti 4 kanavalle.
self.connectChannels(numberOfChannels)
# find maximum ADC count value
# handle = chandle
# pointer to value = ctypes.byref(maxADC)
self.maxADC = ctypes.c_int16()
self.status["maximumValue"] = ps.ps5000aMaximumValue(
self.chandle, ctypes.byref(self.maxADC))
assert_pico_ok(self.status["maximumValue"])
self.setTrigger(ps.PS5000A_CHANNEL["PS5000A_CHANNEL_A"],
int(mV2adc(500, self.chRange[0], self.maxADC)), 1000)
self.maxSamples = self.preTriggerSamples + self.postTriggerSamples
#print(self.maxSamples)
self.returnData = np.zeros((self.numberOfChannels, self.maxSamples))
self.clearDatabuffers()
for index in range(0, self.numberOfChannels):
self.setDatabuffer(index)
self.setTimebase(8)
self.overflow = ctypes.c_int16()
# create converted type maxSamples
self.cmaxSamples = ctypes.c_int32(self.maxSamples)
def setTrigger(self, triggermV, external, delay):
self.threshold = triggermV
self.external = external
# Set up single trigger
# handle = chandle
# enabled = 1
if external:
source = ps.PS5000A_CHANNEL["PS5000A_EXTERNAL"]
else:
source = ps.PS5000A_CHANNEL["PS5000A_CHANNEL_A"]
threshold = int(mV2adc(self.threshold, self.chARange, self.maxADC))
# direction = PS5000A_RISING = 2
# delay = 0 s
# auto Trigger = 0 (never) (whole number for milliseconds)
if (self.runtimeNs) > 2 ^ 16 - 1:
autotriggerDelay = 2 ^ 16 - 1
else:
autotriggerDelay = int(self.runtimeNs)
try:
self.status["trigger"] = ps.ps5000aSetSimpleTrigger(
self.chandle, 1, source, threshold, 2, delay,
ctypes.c_int16(100))
assert_pico_ok(self.status["trigger"])
except:
print("Invalid picoscope trigger settings")
def setDatabuffer(self, channelIndex):
self.bufferMax.append((ctypes.c_int16 * self.maxSamples)())
self.bufferMin.append((ctypes.c_int16 * self.maxSamples)(
)) # used for downsampling which isn't in the scope of this example
# used for downsampling which isn't in the scope of this example
# Set data buffer location for data collection from channel A
# handle = chandle
self.source = ps.PS5000A_CHANNEL["PS5000A_CHANNEL_{0}".format(
self.channels[channelIndex])]
# pointer to buffer max = ctypes.byref(bufferAMax)
# pointer to buffer min = ctypes.byref(bufferAMin)
# buffer length = maxSamples
# segment index = 0
# ratio mode = PS5000A_RATIO_MODE_NONE = 0
self.status["setDataBuffers{0}".format(
self.channels[channelIndex])] = ps.ps5000aSetDataBuffers(
self.chandle, self.source,
ctypes.byref(self.bufferMax[channelIndex]),
ctypes.byref(self.bufferMin[channelIndex]), self.maxSamples, 0,
0)
assert_pico_ok(self.status["setDataBuffers{0}".format(
self.channels[channelIndex])])
self.returnData = np.zeros((self.numberOfChannels, self.maxSamples))
def close(self):
# Close unit Disconnect the scope
# handle = chandle
self.status["close"]=ps.ps5000aCloseUnit(self.chandle)
assert_pico_ok(self.status["close"])
# display status returns
print('The scope was successfully closed')
def run(self):
self.status['run'] = ps.ps5000aRunBlock(self.chandle,
self.preTrigger_samples,
self.postTrigger_samples,
self.timebase, None, 0, None,
None)
assert_pico_ok(self.status['run'])
def defaultSetting(self):
self.status["getTimebase2"] = ps.ps5000aGetTimebase2(self.chandle, \
self.timebase, self.maxSamples, byref(self.timeInternalns),\
None, 0)
assert_pico_ok(self.status["getTimebase2"])
self.chs['A'].coupling_type = ps.PS5000A_COUPLING["PS5000A_AC"]
self.chs['A'].range = ps.PS5000A_RANGE["PS5000A_50MV"]
self.status["setChA"] = self.chs['A'].Enable()
assert_pico_ok(self.status["setChA"])
self.chs['B'].coupling_type = ps.PS5000A_COUPLING["PS5000A_AC"]
self.chs['B'].range = ps.PS5000A_RANGE["PS5000A_50MV"]
self.status["setChB"] = self.chs['B'].Enable()
assert_pico_ok(self.status["setChB"])
self.chs['C'].coupling_type = ps.PS5000A_COUPLING["PS5000A_AC"]
self.chs['C'].range = ps.PS5000A_RANGE["PS5000A_50MV"]
self.status["setChC"] = self.chs['C'].Enable()
assert_pico_ok(self.status["setChC"])
self.chs['D'].coupling_type = ps.PS5000A_COUPLING["PS5000A_AC"]
self.chs['D'].range = ps.PS5000A_RANGE["PS5000A_50MV"]
self.status["setChD"] = self.chs['D'].Enable()
assert_pico_ok(self.status["setChD"])
def configurePSD(self, binWidth, spectrumRange, nTimes=None):
spectrumRange = spectrumRange * 2
requiredSamplingInterval = 1 / spectrumRange
requiredMeasureTime = 1 / binWidth
self.maxSamples = ceil(requiredMeasureTime / requiredSamplingInterval)
self.timebase = floor(requiredSamplingInterval * 125000000 + 2) #14bit
#self.timebase = floor(requiredSamplingInterval * 62500000 + 3) #16bit
self.status["getTimebase2"] = ps.ps5000aGetTimebase2(self.chandle, \
self.timebase, self.maxSamples, byref(self.timeInternalns),\
None, 0)
assert_pico_ok(self.status["getTimebase2"])
self.maxSamples = ceil(requiredMeasureTime * 1e9 /
self.timeInternalns.value)
assert self.timeInternalns.value <= requiredSamplingInterval * 1e9
if bool(nTimes):
nMaxSamples = c_long()
ps.ps5000aMemorySegments(self.chandle, 1, byref(nMaxSamples))
print(nMaxSamples)
nMaxSamples.value = math.floor(nMaxSamples.value /
self.nEnabledChannels())
if nTimes == 'Max':
nTimes = math.floor(nMaxSamples.value / (self.maxSamples)) - 25
print(nTimes, self.maxSamples)
assert self.maxSamples * nTimes < nMaxSamples.value
self.maxSamples = nTimes * self.maxSamples
return nTimes, int(self.maxSamples / nTimes)
def set_channel(self,
channel_name,
coupling_type='DC',
range_value=1,
offset=0,
is_enabled=True):
"""Set up input channels.
:param channel_name: channel name ('A', 'B', etc.)
:param coupling_type: 'AC' or 'DC' coupling
:param range_value: (float) input voltage range in volts
:param offset: analogue offset of the input signal
:param is_enabled: enable or disable the channel
:type is_enabled: boolean
The input voltage range can be 10, 20, 50 mV, 100, 200, 500 mV, 1, 2,
5 V or 10, 20, 50 V, but is given in volts. For example, a range of
20 mV is given as 0.02.
"""
channel = _get_channel_from_name(channel_name)
coupling_type = _get_coupling_type_from_name(coupling_type)
range = _get_range_from_value(range_value)
assert_pico_ok(
ps.ps5000aSetChannel(self._handle, channel, is_enabled,
coupling_type, range, offset))
self._input_voltage_ranges[channel_name] = float(range_value)
self._input_offsets[channel_name] = float(offset)
max_adc_value = ctypes.c_int16()
assert_pico_ok(
ps.ps5000aMaximumValue(self._handle, ctypes.byref(max_adc_value)))
self._input_adc_ranges[channel_name] = max_adc_value.value
self._channels_enabled[channel_name] = is_enabled
def setResolution(self, resolution):
self.resolution = resolution.upper()
_resolution = ps.PS5000A_DEVICE_RESOLUTION['PS5000A_DR_' +
self.resolution.upper()]
self.status['setRes'] = ps.ps5000aSetDeviceResolution(
self.chandle, _resolution)
assert_pico_ok(self.status['setRes'])
def setTrigger(self, source, thresholdmv, delay, timeout=10000):
thresh = int(mV2adc(thresholdmv, self.channela_range, self.maxADC))
enabled = 1 #obvs...
direction = 2 #PS5000A_RISING
self.status["trigger"] = ps.ps5000aSetSimpleTrigger(
self.chandle, enabled, source, thresh, direction, delay, timeout)
assert_pico_ok(self.status["trigger"])
def set_buffer(self, channel: str, enable: bool):
if self.samples is None:
raise ValueError
if enable:
if channel in self.buffers:
del self.buffers[channel]
buffer = (ctypes.c_int16 * self.samples)()
assert_pico_ok(
self.__dispatch_call(
"SetDataBuffer",
self.handle,
self.CHANNELS[channel],
ctypes.byref(buffer),
self.samples,
))
self.buffers[channel] = buffer
else:
assert_pico_ok(
self.__dispatch_call(
"SetDataBuffer",
self.handle,
self.CHANNELS[channel],
None,
self.samples,
))
del self.buffers[channel]
def set_timewindow(self, Samples, Timebase):
# self.user['Trigger']['maxSamples'] = 50 # self.user['Trigger']['PreSamp'] + self.user['Trigger']['PostSamp']
#print(Samples)
#print(Timebase)
self.dev.set_timewindow(Samples, Timebase)
assert_pico_ok(self.dev.status["getTimebase2"])
def set_trigger(self, active, channel, Type, Level, Delay, Auto, Range=0):
if channel in 'External':
LevelADC = int(
mV2adc(
ur(Level.replace(' ', '')).m_as('mV'),
ps.PS5000A_RANGE["PS5000A_5V"], ctypes.c_int16(32767)))
self.dev.setup_trigger(
active, ps.PS5000A_CHANNEL["PS5000A_EXTERNAL"], LevelADC,
ps.PS5000A_THRESHOLD_DIRECTION["PS5000A_{}".format(
Type.upper())], Delay,
int(ur(Auto.replace(' ', '')).m_as('ms')))
else:
LevelADC = int(
mV2adc(
ur(Level.replace(' ', '')).m_as('mV'),
ps.PS5000A_RANGE["PS5000A_{}".format(
Range.replace(' ', '').replace('m', 'M'))],
self.dev.maxADC))
self.dev.setup_trigger(
active,
ps.PS5000A_CHANNEL["PS5000A_CHANNEL_{}".format(channel)],
LevelADC, ps.PS5000A_THRESHOLD_DIRECTION["PS5000A_{}".format(
Type.upper())], Delay,
int(ur(Auto.replace(' ', '')).m_as('ms')))
assert_pico_ok(self.dev.status["trigger"])
def __init__(self):
# Create chandle and status ready for use
self.status = {}
self.chandle = ctypes.c_int16()
# Opens the device/s
self.status["openunit"] = ps.ps3000aOpenUnit(
ctypes.byref(self.chandle), None)
try:
assert_pico_ok(self.status["openunit"])
except:
# powerstate becomes the status number of openunit
powerstate = self.status["openunit"]
# If powerstate is the same as 282 then it will run this if statement
if powerstate == 282:
# Changes the power input to "PICO_POWER_SUPPLY_NOT_CONNECTED"
self.status["ChangePowerSource"] = ps.ps3000aChangePowerSource(
self.chandle, 282)
# If the powerstate is the same as 286 then it will run this if statement
elif powerstate == 286:
# Changes the power input to "PICO_USB3_0_DEVICE_NON_USB3_0_PORT"
self.status["ChangePowerSource"] = ps.ps3000aChangePowerSource(
self.chandle, 286)
else:
raise
assert_pico_ok(self.status["ChangePowerSource"])
def set_channel(self, **kwargs):
'''
set-up an oscilloscope channel.
arguments: none
keyword arguments (defaults in channel.settings):
enabled: True/False
coupling_type: DC/AC
chRange: channel voltage range (from 10mV up to 50V)
analogueOffset: channel analogue offset (roughly -chRange up to +chRange)
after successfully setting the channel, self.settings is updated
'''
# Set up channel
settings = {} #in case of failure, settings is updated only at the end
for key,current_value in self.settings.items():
settings[key] = kwargs[key] if key in kwargs else current_value
#checks
check_kwargs_scope(**kwargs)
if 'analogueOffset' in kwargs:
self.check_analogueOffset(settings)
# handle = chandle
self._source = ps.PS5000A_CHANNEL[channel_index[self.source]]
_enabled = int(settings['enabled'])
_coupling_type = ps.PS5000A_COUPLING[coupling_type_index[settings['coupling_type']]]
_chRange = ps.PS5000A_RANGE[range_index[settings['chRange']]]
_analogueOffset = ctypes.c_float(settings['analogueOffset']) #V
self.status["setCh"] = ps.ps5000aSetChannel(self.chandle, self._source, _enabled,
_coupling_type, _chRange, _analogueOffset)
assert_pico_ok(self.status["setCh"])
self.settings = settings
def resolution(self,value,at_startup=False):
value = value.upper()
possible_values = [str(r)+'BIT' for r in [8,12,14,15,16]]
assert value in possible_values, 'resolution can be 8,12,14, 15 or 16BIT'
res = ps.PS5000A_DEVICE_RESOLUTION["PS5000A_DR_"+value.upper()]
status = ps.ps5000aSetDeviceResolution(self.chandle,res)
assert_pico_ok(status)
self.settings['resolution'] = value
def _maxADC(self):
# find maximum ADC count value
# handle = chandle
# pointer to value = ctypes.byref(maxADC)
maxADC = ctypes.c_int16()
self.status["maximumValue"] = ps.ps5000aMaximumValue(self.chandle, ctypes.byref(maxADC))
assert_pico_ok(self.status["maximumValue"])
return maxADC
def close(self):
self.status["stop"] = ps.ps3000aStop(self.chandle)
assert_pico_ok(self.status["stop"])
# Closes the unit
# Handle = chandle
self.status["close"] = ps.ps3000aCloseUnit(self.chandle)
assert_pico_ok(self.status["close"])
def getTimebase(self):
self.status["GetTimebase"] = ps.ps5000aGetTimebase2(
self.chandle, self.timebase, self.maxsamples,
ctypes.byref(self.timeIntervalns),
ctypes.byref(self.returnedMaxSamples), 0)
assert_pico_ok(self.status["GetTimebase"])
print("Picoscope sampling interval:" + str(self.timeIntervalns.value) +
" ns")
def LPF20M(self, ch, On):
if On:
self.status["SetBWlimiter"] = ps.ps5000aSetBandwidthFilter(\
self.chandle, self.chs[ch].channel, c_int32(1))
else:
self.status["SetBWlimiter"] = ps.ps5000aSetBandwidthFilter(\
self.chandle, self.chs[ch].channel, c_int32(0))
assert_pico_ok(self.status["SetBWlimiter"])
def change_powersupply(self, state):
if state == 286: # USB3_0_DEVICE_NON_USB3_0_PORT (Does this work?)
self.status["changePowerSource"] = ps.ps5000aChangePowerSource(self.chandle, state) # Change powersource to USB2
elif state == 282: # POWER_SUPPLY_NOT_CONNECTED
self.status["changePowerSource"] = ps.ps5000aChangePowerSource(self.chandle, state) # Change powersource to USB3
else:
self.status["changePowerSource"] = state
assert_pico_ok(self.status["changePowerSource"]) # Check whether the powerchange was successful
def disconnect(self):
self.status["stop"] = ps.ps5000aStop(self.chandle)
assert_pico_ok(self.status["stop"])
# Closes the unit
# Handle = chandle
self.status["close"] = ps.ps5000aCloseUnit(self.chandle)
assert_pico_ok(self.status["close"])
print("\n----------------- \nConnection closed \n-----------------")
def softTrig(self,state):
'''
activates the AWG with the soft trigger
only triggerSouce = soft_trig can allow using software trigger
'''
assert self.settings['triggerSource']=='soft_trig', 'only triggerSouce = soft_trig can allow using software trigger. See help(set_builtin())'
if self.settings['direction']=='gate_low':
state = 1-int(state)
self.status["softTrig"] = ps.ps5000aSigGenSoftwareControl(self.chandle,state)
assert_pico_ok(self.status["softTrig"])
def get_variant(self):
if self._variant is not None:
return self._variant
info = (ctypes.c_int8 * 6)()
size = ctypes.c_int16(6)
assert_pico_ok(
self.__dispatch_call("GetUnitInfo", self.handle,
ctypes.byref(info), size, 3))
self._variant = "".join(chr(i) for i in info[:size.value])
return self._variant
def check_analogueOffset(self,settings):
#queries maximum allowable analogueOffset range
_chRange = ps.PS5000A_RANGE[range_index[settings['chRange']]]
_coupling_type = ps.PS5000A_COUPLING[coupling_type_index[settings['coupling_type']]]
minOffset = ctypes.c_float()
maxOffset = ctypes.c_float()
status = ps.ps5000aGetAnalogueOffset(self.chandle, _chRange,_coupling_type, ctypes.byref(maxOffset),ctypes.byref(minOffset))
assert_pico_ok(status)
assert_msg = 'analogue offset should be within [{0}, {1}]V'.format(minOffset.value,maxOffset.value)
assert (settings['analogueOffset']<=maxOffset.value and settings['analogueOffset']>=minOffset.value), assert_msg
