feat: Add channelized Lakeshore Model336 Driver

Add a driver for the Lakeshore Model 336 temperature controller
using new channelization implementation.

qcodes/instrument_drivers/Lakeshore/Model_336.py

@@ -0,0 +1,52 @@
+
+import numpy as numpy
+from qcodes import Parameter, VisaInstrument, InstrumentChannel, ChannelList
+from qcodes.utils.validators import Numbers, Enum, Strings
+
+class SensorChannel(InstrumentChannel):
+	"""
+	A single sensor channel of a temperature controller
+	"""
+
+	_CHANNEL_VAL = Enum("A", "B", "C", "D")
+
+	def __init__(self, parent, name, channel):
+		super().__init__(parent, name)
+
+		# Validate the channel value
+		self._CHANNEL_VAL.validate(channel)
+		self._channel = channel # Channel on the temperature controller. Can be A-D
+
+		# Add the various channel parameters
+		self.add_parameter('temperature', get_cmd='KRDG? {}'.format(self._channel),
+			get_parser=float,
+			label='Temerature',
+			unit='K')
+		self.add_parameter('sensor_raw', get_cmd='SRDG? {}'.format(self._channel),
+			get_parser=float,
+			label='Raw_Reading',
+			unit='Ohms') # TODO: This will vary based on sensor type
+		self.add_parameter('sensor_status', get_cmd='RDGST? {}'.format(self._channel),
+			val_mapping={'OK': 0, 'Invalid Reading': 1, 'Temp Underrange': 16, 'Temp Overrange': 32,
+			'Sensor Units Zero': 64, 'Sensor Units Overrange': 128}, label='Sensor_Status')
+
+		self.add_parameter('sensor_name', get_cmd='INNAME? {}'.format(self._channel),
+			get_parser=str, set_cmd='INNAME {},\"{{}}\"'.format(self._channel), vals=Strings(15),
+			label='Sensor_Name')
+
+
+class Model_336(VisaInstrument):
+	"""
+	Lakeshore Model 336 Temperature Controller Driver
+	Controlled via sockets
+	"""
+
+	def __init__(self, name, address, **kwargs):
+		super().__init__(name, address, terminator="\r\n", **kwargs)
+
+		self.channels = ChannelList(self, "TempSensors", SensorChannel)
+		for chan in ('A', 'B', 'C', 'D'):
+			self.channels.append(SensorChannel(self, 'Chan{}'.format(chan), chan))
+		self.channels.lock()
+
+		self.connect_message()