120 lines
3.2 KiB
Python
120 lines
3.2 KiB
Python
# *****************************************************************************
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors: Oksana Shliakhtun <oksana.shliakhtun@psi.ch>
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# *****************************************************************************
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import re
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from frappy.core import HasIO, Readable, Drivable, Parameter, FloatRange, IntRange, EnumType, \
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Enum
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class BridgeIO(HasIO):
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end_of_line = b'\r' # should be <lf> or <cr>
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identification = [('*IDN?', r'Stanford_Research_Systems,.*')]
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def comm(self, port, cmd):
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self.communicate(f'conn {port}')
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return self.communicate(f'send {port}, "{cmd}\r"')
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def set_par(self, cmd, *args):
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head = ','.join([cmd] + [a if isinstance(a, str) else f'{a:g}' for a in args])
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tail = cmd.replace(' ', '? ')
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new_tail = re.sub(r'[0-9.]+', '', tail)
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reply = self.comm(f'{head};{new_tail}')
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result = []
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for num in reply.split(','):
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try:
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result.append(float(num))
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except ValueError:
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result.append(num)
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if len(result) == 1:
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return result[0]
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return result
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def get_par(self, cmd):
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reply = self.comm(cmd)
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result = []
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for num in reply.split(','):
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try:
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result.append(float(num))
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except ValueError:
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result.append(num)
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if len(result) == 1:
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return result[0]
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return result
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class SIM921(BridgeIO, Readable, Drivable):
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#port = Parameter()
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value = Parameter('temperature', unit='K')
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setpoint = Parameter('temperature deviation', datatype=FloatRange, unit='K')
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resistance = Parameter('resistance', datatype=FloatRange, unit='ohm')
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irange = Parameter('resistance range index', IntRange)
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phase = Parameter('phase', FloatRange, unit='ang')
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tc = Parameter('time constant', FloatRange)
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autorange = Parameter('autorange_on', EnumType('autorange', off=0, soft=1, hard=2),
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readonly=False, default=0)
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ioClass = BridgeIO
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def read_resistance(self):
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return self.get_par('rval')
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def read_value(self):
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return self.get_par('tval')
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def read_phase(self):
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return self.get_par('phase')
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def read_setpoint(self):
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return self.get_par('tset')
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def write_setpoint(self, setpoint):
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return self.comm(f'tset {setpoint}')
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def read_tc(self):
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return self.get_par('tcon')
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def write_tc(self, tc):
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return self.set_par(f'tcon {tc}')
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