add SR lockin
Change-Id: I4807ead7ceefcf0e266f7d215ef2898d54da9f53
This commit is contained in:
Oksana Shliakhtun
parent
04b9bed7c9
commit
85dd905cfd
261
frappy_psi/SR.py
261
frappy_psi/SR.py
@ -21,115 +21,157 @@
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"""Signal Recovery SR7270: lockin amplifier for AC susceptibility"""
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"""Signal Recovery SR7270: lockin amplifier for AC susceptibility"""
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from frappy.core import Readable, Parameter, FloatRange, TupleOf, \
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from frappy.core import Readable, Parameter, FloatRange, TupleOf, \
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HasIO, StringIO, Attached, IntRange, BoolType, Writable, EnumType
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HasIO, StringIO, IntRange, BoolType, Writable, EnumType
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class SR7270_IO(StringIO):
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class SR_IO(StringIO):
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end_of_line = b'\x00'
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end_of_line = b'\x00'
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identification = [('ID', r'.*')] # Identification
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identification = [('ID', r'.*')] # Identification; causes the lock-in amplifier to respond with the number 7270
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def communicate(self, cmd): # remove dash from terminator
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class Ametek(StringIO):
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reply = super().communicate(cmd)
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def get_par(self, cmd): # remove dash from terminator
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reply = StringIO.communicate(self, cmd)
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status = self._conn.readbytes(2, 0.1) # get the 2 status bytes
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status = self._conn.readbytes(2, 0.1) # get the 2 status bytes
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return reply + ';%d;%d' % tuple(status)
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return reply + ';%d;%d' % tuple(status)
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class Ametek(StringIO, HasIO):
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ioClass = SR_IO
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def comm(self, cmd):
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def comm(self, cmd):
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reply, status, overload = self.get_par(cmd).split(';')
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reply, status, overload = self.communicate(cmd).split(b';')
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if overload != '0':
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if overload != b'0':
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self.status = self.Status.WARN, f'overload {overload}'
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self.status = (self.Status.WARN, f'overload {overload}')
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self.status = self.Status.IDLE, ''
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self.status = (self.Status.IDLE, '')
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return reply
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return reply
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class XY(HasIO, Readable):
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class XY(Ametek, Readable):
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ioClass = SR7270
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# parameters required an initial value but initwrite write the default value for polled parameters
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value = Parameter('X, Y', datatype=TupleOf(FloatRange(unit='V'), FloatRange(unit='V')))
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value = Parameter('X, Y', datatype=TupleOf(FloatRange(unit='V'), FloatRange(unit='V')))
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vmode = Parameter('control mode', EnumType(both_grounded=0, A=1, B=2, A_B_diff=3), readonly=False)
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range = Parameter('sensitivity value', FloatRange(0.00, 1), unit='V', default=1)
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autosen_on = Parameter('is auto sensitivity on', BoolType(), readonly=False)
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noise_control = Parameter('noise control mode', BoolType(), readonly=False)
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phase = Parameter('reference phase control', FloatRange(-360, 360), unit='deg', readonly=False)
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sen_range = {name: value + 1 for value, name in enumerate(
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['2nV', '5nV', '10nV', '20nV', '50nV', '100nV', '200nV', '500nV', '1uV',
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'2uV', '5uV', '10uV', '20uV', '50uV', '100uV', '200uV', '500uV', '1mV',
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'2mV', '5mV', '10mV', '20mV', '50mV', '100mV', '200mV', '500mV', '1V']
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)}
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irange = Parameter('sensitivity index', EnumType('sensitivity index range', sen_range), readonly=False)
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# separate module (Writable)
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time_const = {value: name for value, name in enumerate(
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class Frequency(Ametek, Writable):
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[('10us', 'N/A'), ('20us', 'N/A'), ('50us', 'N/A'), ('100us', 'N/A'),
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value = Parameter('exc_freq_int', FloatRange(0.001, 250e3, unit='Hz'),
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('200us', 'N/A'), ('500us', '500us'), ('1ms', '1ms'), ('2ms', '2ms'),
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readonly=False, default=1000) # initwrite=True,
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('5ms', '5ms'), ('10ms', '10ms'), ('20ms', 'N/A'), ('50ms', 'N/A'),
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('100ms', 'N/A'), ('200ms', 'N/A'), ('500ms', 'N/A'), ('1s', 'N/A'),
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('2s', 'N/A'), ('5s', 'N/A'), ('10s', 'N/A'), ('20s', 'N/A'), ('50s', 'N/A'),
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('100s', 'N/A'), ('200s', 'N/A'), ('500s', 'N/A'), ('1ks', 'N/A'),
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('10ks', 'N/A'), ('20ks', 'N/A'), ('50ks', 'N/A'), ('100ks', 'N/A')]
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)}
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itc = Parameter('time const. index', EnumType('time const. index range', time_const), readonly=False)
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def read_freq(self):
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def read_vmode(self):
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return self.comm('OF.')
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return self.comm('VMODE')
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def write_freq(self, value):
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def write_vmode(self, vmode):
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self.comm(f'OF. {value}')
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self.comm(f'IMODE {0}')
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return value
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return self.comm(f'VMODE {vmode}')
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def read_autosen_on(self):
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return self.comm('AUTOMATIC')
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# separate module (Writable)
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def write_autosen_on(self, autosen_on):
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class Amp(Ametek, Writable):
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return self.comm(f'AUTOMATIC {autosen_on}')
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value = Parameter('exc_volt_int',
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FloatRange(0.00, 5, unit='Vrms'),
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readonly=False, default=0.1) # initwrite=True,
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# unify the following
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range = Parameter('sensitivity value', FloatRange(0.00, 1, unit='V'), default=1)
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irange = Parameter('sensitivity index', IntRange(0, 27), readonly=False, default=25)
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autorange = Parameter('autorange_on', EnumType('autorange', off=0, soft=1, hard=2), readonly=False,
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def read_irange(self):
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default=0) # , initwrite=True
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return self.comm('SEN')
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# unify the following
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def write_irange(self, irange):
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tc = Parameter('time constant value', FloatRange(10e-6, 100), unit='s', default=0.1)
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self.comm(f'IMODE {0}')
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itc = Parameter('time constant index', IntRange(0, 30), default=14, readonly=False)
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self.comm(f'SEN {irange}')
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self.read_range()
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return irange
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nm = Parameter('noise mode', BoolType(), readonly=False, default=0)
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def read_range(self):
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phase = Parameter('Reference phase control', FloatRange(-360, 360, unit='deg'),
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return self.comm('SEN.') # range value
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readonly=False, default=0)
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# convert to enum
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def write_range(self):
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vmode = Parameter('control mode', IntRange(0, 3), readonly=False, default=3)
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self.comm(f'IMODE {0}')
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curr_value = self.read_range()
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new_value = self.value
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c_ind = None # closest parameters
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c_diff = None
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for index, value in self.sen_range.items():
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diff = abs(curr_value - value)
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if c_diff is None or diff < c_diff:
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c_ind = index
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c_diff = diff
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if abs(curr_value - new_value) < c_diff:
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return self.comm(f'SEN {c_ind}')
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else:
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for index, value in self.sen_range.items():
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diff = abs(new_value - value)
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if c_diff is None or diff < c_diff:
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c_ind = index
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c_diff = diff
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return self.comm(f'SEN {c_ind}')
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# dac = Parameter('output DAC channel value', datatype=TupleOf(IntRange(1, 4), FloatRange(0.0, 5000, unit='mV')),
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def read_noise_control(self):
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# readonly=False, initwrite=True, default=(3,0))
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return self.comm('NOISEMODE')
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# dac = Parameter('output DAC channel value', FloatRange(-10000, 10000, unit='mV'),
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# readonly=False, initwrite=True, default=0)
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def write_noise_control(self, noise_control):
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return self.comm(f'NOISEMODE {noise_control}')
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def read_tc(self):
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return self.comm('TC.')
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def read_itc(self):
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return self.comm(f'TC')
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# def write_tc(self, itc):
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# if self.noise_control == 0:
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# self.itc = self.
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# OS - there should be parameter+command IMODE before
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def read_value(self):
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def read_value(self):
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reply = self.comm('XY.').split(',')
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reply = self.comm('XY.').split(',')
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x = float(reply[0])
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x = float(reply[0])
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y = float(reply[1])
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y = float(reply[1])
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if self.autorange == 1: # soft
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if max(abs(x), abs(y)) >= 0.9 * self.range and self.irange < 27:
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self.write_irange(self.irange + 1)
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elif max(abs(x), abs(y)) <= 0.3 * self.range and self.irange > 1:
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self.write_irange(self.irange - 1)
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self._x.value = x # to update X,Y classes which will be the collected data.
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self._y.value = y
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return x, y
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return x, y
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def write_autorange(self, value):
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def write_value(self, value):
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if value == 2: # hard
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return self.comm(f'XY {value}')
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self.comm('AS') # put hardware autorange on
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self.comm('AUTOMATIC. 1')
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else:
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self.comm('AUTOMATIC. 0')
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return value
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def read_autorange(self):
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reply = self.comm('AUTOMATIC')
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# determine hardware autorange
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if reply == 1: # "hardware auto range is on"
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return 2 # hard
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if self.autorange == 0: # soft
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return self.autorange() # read autorange
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return reply # off
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class Frequency(XY, Writable):
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value = Parameter('oscill. frequen. control', FloatRange(0.001, 250e3), unit='Hz', readonly=False)
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target = Parameter('target frequency', FloatRange(0.001, 250e3), unit='Hz', readonly=False)
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def read_value(self):
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return self.comm('OF.')
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def write_target(self,):
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target = self.target()
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return self.comm(f'OF. {target}')
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class Amplitude(XY, Writable):
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value = Parameter('oscill. amplit. control', FloatRange(0.00, 5), unit='V_rms', readonly=False)
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target = Parameter('target amplit.', FloatRange(0.00, 5), unit='V_rms', readonly=False)
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# unify the following
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# dac = Parameter('output DAC channel value', datatype=TupleOf(IntRange(1, 4), FloatRange(0.0, 5000, unit='mV')),
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# readonly=False, initwrite=True, default=(3,0))
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# dac = Parameter('output DAC channel value', FloatRange(-10000, 10000, unit='mV'),
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# readonly=False, initwrite=True, default=0)
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# oscillator amplitude module
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# oscillator amplitude module
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def read_amp(self):
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reply = self.comm('OA.')
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return reply
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def write_amp(self, value):
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def read_value(self):
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self.comm(f'OA. {value}')
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return self.comm('OA.')
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return value
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def write_target(self):
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target = self.target()
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return self.comm(f'OA. {target}')
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# external output DAC
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# external output DAC
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# def read_dac(self):
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# def read_dac(self):
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@ -142,75 +184,26 @@ class Amp(Ametek, Writable):
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# self.comm('DAC 3 %g' % value)
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# self.comm('DAC 3 %g' % value)
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# return value
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# return value
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# sensitivity module
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def read_range(self):
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reply = self.comm('SEN.')
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return reply
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def write_irange(self, value):
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self.comm('SEN %g' % value)
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self.read_range()
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return value
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def read_irange(self):
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reply = self.comm('SEN')
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return reply
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# time constant module/ noisemode off or 0 allows to use all the time constant range
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def read_nm(self):
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reply = self.comm('NOISEMODE')
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return reply
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def write_nm(self, value):
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self.comm('NOISEMODE %d' % int(value))
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self.read_nm()
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return value
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def read_tc(self):
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reply = self.comm('TC.')
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return reply
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def write_itc(self, value):
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self.comm('TC %g' % value)
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self.read_tc()
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return value
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def read_itc(self):
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reply = self.comm('TC')
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return reply
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# phase and autophase
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# phase and autophase
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def read_phase(self):
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def read_phase(self):
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reply = self.comm('REFP.')
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reply = self.comm('REFP.')
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return reply
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return reply
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def write_phase(self, value):
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def write_phase(self, value):
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self.comm('REFP %d' % round(1000 * value, 0))
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self.comm(f'REFP {round(1000 * value)}')
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self.read_phase()
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self.read_phase()
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return value
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return value
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def aphase(self):
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def aphase(self):
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"""auto phase"""
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"""auto phase"""
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self.read_phase()
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self.read_phase()
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reply = self.comm('AQN')
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return self.comm('AQN')
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self.read_phase()
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# voltage input configuration 0:grounded,1=A,2=B,3=A-B
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# class Comp(Ametek, Readable):
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# def read_vmode(self):
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# enablePoll = False
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# reply = self.comm('VMODE')
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# value = Parameter(datatype=FloatRange(unit='V'))
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# return reply
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#
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#
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def write_vmode(self, value):
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# class arg(Ametek, Readable):
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self.comm(f'IMODE {0}') # voltage enabled
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# enablePoll = False
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self.comm(f'VMODE {value}')
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# value = Parameter(datatype=FloatRange(unit=''))
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return value
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class Comp(Readable):
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enablePoll = False
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value = Parameter(datatype=FloatRange(unit='V'))
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class arg(Readable):
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enablePoll = False
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value = Parameter(datatype=FloatRange(unit=''))
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