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.ps3000aSetChannel(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.ps3000aMaximumValue(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 setChannel(self,
channel,
enabled=1,
coupling_type=1,
Range=8,
analogue_offset=0):
# Set up channel A
# handle = chandle
# channel = PS3000A_CHANNEL_A = 0
# enabled = 1
# coupling type = PS3000A_DC = 1
# range = PS3000A_10V = 8
# analogue offset = 0 V
self.chARange = Range
self.status["setChA"] = ps.ps3000aSetChannel(self.chandle, channel,
enabled, coupling_type,
Range, analogue_offset)
assert_pico_ok(self.status["setChA"])
# Changes the power input to "PICO_USB3_0_DEVICE_NON_USB3_0_PORT"
status["ChangePowerSource"] = ps.ps3000aChangePowerSource(chandle, 286)
else:
raise
assert_pico_ok(status["ChangePowerSource"])
# Set up channel A
# handle = chandle
# channel = PS3000A_CHANNEL_A = 0
# enabled = 1
# coupling type = PS3000A_DC = 1
# range = PS3000A_10V = 8
# analogue offset = 0 V
chARange = 8
status["setChA"] = ps.ps3000aSetChannel(chandle, 0, 1, 1, chARange, 0)
assert_pico_ok(status["setChA"])
# Finds the max ADC count
# Handle = chandle
# Value = ctypes.byref(maxADC)
maxADC = ctypes.c_int16()
status["maximumValue"] = ps.ps3000aMaximumValue(chandle, ctypes.byref(maxADC))
assert_pico_ok(status["maximumValue"])
# Set an advanced trigger
adcTriggerLevel = mV2adc(500, chARange, maxADC)
# set trigger channel properties
# handle = chandle
channelProperties = ps.PS3000A_TRIGGER_CHANNEL_PROPERTIES(
assert_pico_ok(status["changePowerSource"])
enabled = 1
disabled = 0
analogue_offset = 0.0
# Set up channel A
# handle = chandle
# channel = PS3000A_CHANNEL_A = 0
# enabled = 1
# coupling type = PS3000A_DC = 1
# range = PS3000A_2V = 7
# analogue offset = 0 V
channel_range = ps.PS3000A_RANGE['PS3000A_2V']
status["setChA"] = ps.ps3000aSetChannel(
chandle, ps.PS3000A_CHANNEL['PS3000A_CHANNEL_A'], enabled,
ps.PS3000A_COUPLING['PS3000A_DC'], channel_range, analogue_offset)
assert_pico_ok(status["setChA"])
# Set up channel B
# handle = chandle
# channel = PS3000A_CHANNEL_B = 1
# enabled = 1
# coupling type = PS3000A_DC = 1
# range = PS3000A_2V = 7
# analogue offset = 0 V
status["setChB"] = ps.ps3000aSetChannel(
chandle, ps.PS3000A_CHANNEL['PS3000A_CHANNEL_B'], enabled,
ps.PS3000A_COUPLING['PS3000A_DC'], channel_range, analogue_offset)
assert_pico_ok(status["setChB"])