fixes on small furnace

frappy_psi/ionopimax.py

@@ -22,7 +22,7 @@ import os
 from glob import glob
 from frappy.core import Readable, Writable, Parameter, BoolType, StringType,\
     FloatRange, Property, TupleOf, ERROR, IDLE
-from frappy.errors import ConfigError
+from frappy.errors import ConfigError, OutOfRangeError
 from math import log
 
 basepaths = '/sys/class/ionopimax', '/sys/class/ionopi'
@@ -121,8 +121,8 @@ class CurrentInput(AnalogInput):
         result = super().read_value()
         if self.x > 0.021:
             self.status = ERROR, 'sensor broken'
-        else:
-            self.status = IDLE, ''
+            raise OutOfRangeError('sensor broken')
+        self.status = IDLE, ''
         return result
 
 
@@ -146,3 +146,18 @@ class VoltageOutput(AnalogOutput):
         self.write(f'{self.addr}_mode', 'V')
         self.write(f'{self.addr}', '0')
         self.write(f'{self.addr}_enabled', '1')
+
+
+class VoltagePower(Base, Writable):
+    devclass = 'power_out'
+    target = Parameter(datatype=FloatRange(0, 24.5, unit='V'), default=12)
+    addr = 'vso'
+
+    def write_target(self, value):
+        if value:
+            self.write(self.addr, value, 1000)
+            self.write(f'{self.addr}_enabled', 1)
+        else:
+            self.write(f'{self.addr}_enabled', 0)
+
+