Change dac_output_enabled to a property.

Recalculate the full speed LSB setting when this property is changed too.

Author: stoklund

adafruit_emc2101/__init__.py

@@ -209,9 +209,7 @@ class to add those features, at the cost of increased memory usage.
     """When set to True, the magnitude of the fan output signal is inverted, making 0 the maximum
     value and 100 the minimum value"""
 
-    dac_output_enabled = RWBit(_REG_CONFIG, 4)
-    """When set, the fan control signal is output as a DC voltage instead of a PWM signal"""
-
+    _dac_output_enabled = RWBit(_REG_CONFIG, 4)
     _conversion_rate = RWBits(4, 0x04, 0)
     # fan spin-up
     _spin_drive = RWBits(2, _FAN_SPINUP, 3)
@@ -299,6 +297,16 @@ def manual_fan_speed(self, fan_speed):
         self._fan_setting = fan_speed_lsb
         self._fan_lut_prog = lut_disabled
 
+    @property
+    def dac_output_enabled(self):
+        """When set, the fan control signal is output as a DC voltage instead of a PWM signal"""
+        return self._dac_output_enabled
+
+    @dac_output_enabled.setter
+    def dac_output_enabled(self, value):
+        self._dac_output_enabled = value
+        self._calculate_full_speed(dac=value)
+
     @property
     def lut_enabled(self):
         """Enable or disable the internal look up table used to map a given temperature