3. Dev/voltage to power (#816)

* getVoltageList, getVoltage /set, getMeasuredVoltage, getVoltageNames /set, getVoltageIndex moved to 'Power' as its misleading

* added cstdint and names slowadc,  added division to mV

* changed uV to mV in command line slow adc help. removed all python slowadcs (as it was already implemented as slowadc

---------

Co-authored-by: Erik Frojdh <erik.frojdh@gmail.com>

python/slsdet/powers.py

@@ -0,0 +1,195 @@
+# SPDX-License-Identifier: LGPL-3.0-or-other
+# Copyright (C) 2021 Contributors to the SLS Detector Package
+from .detector_property import DetectorProperty
+from functools import partial
+import numpy as np
+import _slsdet
+from .detector import freeze
+dacIndex = _slsdet.slsDetectorDefs.dacIndex
+class Power(DetectorProperty):
+    """
+    This class represents a power on the Chip Test Board. One instance handles all
+    powers with the same name for a multi detector instance. (TODO: Not needed for CTB)
+
+    .. note ::
+
+        This class is used to build up DetectorPowers and is in general
+        not directly accessible to the user.
+
+
+    """
+    def __init__(self, name, enum, default, detector):
+
+        super().__init__(partial(detector.getPower, enum),
+                         lambda x, y : detector.setPower(enum, x, y),
+                         detector.size,
+                         name)
+
+        self.default = default
+
+
+    def __repr__(self):
+        """String representation for a single power in all modules"""
+        powerstr = ''.join([f'{item:5d}' for item in self.get()])
+        return f'{self.__name__:15s}:{powerstr}'
+
+class NamedPowers:
+    """
+    New implementation of the detector powers. 
+    """
+    _frozen = False
+    _direct_access = ['_detector', '_current', '_powernames']
+    def __init__(self, detector):
+        self._detector = detector
+        self._current = 0
+
+        #only get the powernames if we have modules attached
+        if detector.size() == 0:
+            self._powernames  = ["VA", "VB", "VC", "VD", "VIO"]
+        else:
+            self._powernames = [n.replace(" ", "") for n in detector.getPowerNames()]
+
+        # Populate the powers
+        for i,name in enumerate(self._powernames):
+            #name, enum, low, high, default, detector
+            k = dacIndex(i + int(dacIndex.V_POWER_A))
+            setattr(self, name, Power(name, k, 0, detector))
+
+        self._frozen = True
+
+    # def __getattr__(self, name):
+    #     return self.__getattribute__('_' + name)
+
+    def __setattr__(self, name, value):
+        if not self._frozen:
+            #durning init we need to be able to set up the class
+            super().__setattr__(name, value)
+        else:
+            #Later we restrict us to manipulate powers and a few fields
+            if name in self._direct_access:
+                super().__setattr__(name, value)
+            elif name in self._powernames:
+                return self.__getattribute__(name).__setitem__(slice(None, None), value)
+            else:
+                raise AttributeError(f'Power not found: {name}')
+
+    def __next__(self):
+        if self._current >= len(self._powernames):
+            self._current = 0
+            raise StopIteration
+        else:
+            self._current += 1
+            return self.__getattribute__(self._powernames[self._current-1])
+            # return self.__getattr__(self._powernames[self._current-1])
+
+    def __iter__(self):
+        return self
+
+    def __repr__(self):
+        r_str = ['========== POWERS =========']
+        r_str += [repr(power) for power in self]
+        return '\n'.join(r_str)
+    def get_asarray(self):
+        """
+        Read the powers into a numpy array with dimensions [npowers, nmodules]
+        """
+        power_array = np.zeros((len(self._powernames), len(self._detector)))
+        for i, _d in enumerate(self):
+            power_array[i,:] = _d[:]
+        return power_array
+
+    def to_array(self):
+        return self.get_asarray()       
+
+    def set_from_array(self, power_array):
+        """
+        Set the power from an numpy array with power values. [npowers, nmodules]
+        """
+        power_array = power_array.astype(np.int)
+        for i, _d in enumerate(self):
+            _d[:] = power_array[i]
+
+    def from_array(self, power_array):
+        self.set_from_array(power_array)
+
+class DetectorPowers:
+    _powers = []
+    _powernames = [_d[0] for _d in _powers]
+    _allowed_attr = ['_detector', '_current']
+    _frozen = False
+
+    def __init__(self, detector):
+        # We need to at least initially know which detector we are connected to
+        self._detector = detector
+
+        # Index to support iteration
+        self._current = 0
+
+        # Name the attributes? 
+        for _d in self._powers:
+            setattr(self, '_'+_d[0], Power(*_d, detector))
+
+        self._frozen = True
+
+    def __getattr__(self, name):
+        return self.__getattribute__('_' + name)
+
+    @property
+    def powernames(self):
+        return [_d[0] for _d in _powers]
+        
+    def __setattr__(self, name, value):
+        if name in self._powernames:
+            return self.__getattribute__('_' + name).__setitem__(slice(None, None), value)
+        else:
+            if self._frozen == True and name not in self._allowed_attr:
+                raise AttributeError(f'Power not found: {name}')
+            super().__setattr__(name, value)
+
+
+    def __next__(self):
+        if self._current >= len(self._powers):
+            self._current = 0
+            raise StopIteration
+        else:
+            self._current += 1
+            return self.__getattr__(self._powernames[self._current-1])
+
+    def __iter__(self):
+        return self
+
+    def __repr__(self):
+        r_str = ['========== POWERS =========']
+        r_str += [repr(power) for power in self]
+        return '\n'.join(r_str)
+
+    def get_asarray(self):
+        """
+        Read the powers into a numpy array with dimensions [npowers, nmodules]
+        """
+        power_array = np.zeros((len(self._powers), len(self._detector)))
+        for i, _d in enumerate(self):
+            power_array[i,:] = _d[:]
+        return power_array
+
+    def to_array(self):
+        return self.get_asarray()
+
+    def set_from_array(self, power_array):
+        """
+        Set the powers from an numpy array with power values. [npowers, nmodules]
+        """
+        power_array = power_array.astype(np.int)
+        for i, _d in enumerate(self):
+            _d[:] = power_array[i]
+
+    def from_array(self, power_array):
+        self.set_from_array(power_array)
+
+    def set_default(self):
+        """
+        Set all powers to their default values
+        """
+        for _d in self:
+            _d[:] = _d.default
+