main module of LS370 is now drivable

- the main value is the channel
- it is busy when pausing during scanning
+ allow softcal to ignore the sign

secop_psi/softcal.py

@@ -26,7 +26,7 @@ import math
 import numpy as np
 from scipy.interpolate import splrep, splev  # pylint: disable=import-error
 
-from secop.core import Readable, Parameter, Override, Attached, StringType
+from secop.core import Readable, Parameter, Override, Attached, StringType, BoolType
 
 
 def linear(x):
@@ -152,6 +152,7 @@ class Sensor(Readable):
     }
     parameters = {
         'calib': Parameter('calibration name', datatype=StringType(), readonly=False),
+        'abs': Parameter('True: take abs(raw) before calib', datatype=BoolType(), readonly=False, default=True),
         'value': Override(unit='K'),
         'pollinterval': Override(export=False),
         'status': Override(default=(Readable.Status.ERROR, 'unintialized'))
@@ -169,10 +170,15 @@ class Sensor(Readable):
         return value
 
     def update_value(self, value):
+        if self.abs:
+            value = abs(value)
         self.value = self._calib(value)
         self._value_error = None
 
     def error_update_value(self, err):
+        if self.abs and str(err) == 'R_UNDER':
+            self._value_error = None
+            return None
         self._value_error = repr(err)
         raise err