add property style access to thresholds

Author: caternuson

adafruit_mpr121.py

@@ -96,6 +96,19 @@ def raw_value(self):
         """The raw touch measurement."""
         return self._mpr121.filtered_data(self._channel)
 
+    @property
+    def thresholds(self):
+        """The touch / release threholds."""
+        buf = bytearray(2)
+        self._mpr121._read_register_bytes(MPR121_TOUCHTH_0 + 2*self._channel, buf, 2)
+        return (buf[0], buf[1])
+
+    @thresholds.setter
+    def thresholds(self, value):
+        touch, release = value
+        self._mpr121._write_register_byte(MPR121_TOUCHTH_0 + 2*self._channel, touch)
+        self._mpr121._write_register_byte(MPR121_RELEASETH_0 + 2*self._channel, release)                
+
 class MPR121:
     """Driver for the MPR121 capacitive touch breakout board."""
 
@@ -118,6 +131,18 @@ def touched_pins(self):
         touched = self.touched()
         return tuple([bool(touched >> i & 0x01) for i in range(12)])
 
+    @property
+    def thresholds(self):
+        """The touch / release threholds for all channels."""
+        buf = bytearray(24)
+        self._read_register_bytes(MPR121_TOUCHTH_0, buf, 24)
+        return tuple( [ (buf[2*i], buf[2*i+1]) for i in range(12) ] )
+
+    @thresholds.setter
+    def thresholds(self, value):
+        touch, release = value
+        self.set_thresholds(touch, release)
+        
     def _write_register_byte(self, register, value):
         # Write a byte value to the specifier register address.
         # MPR121 must be put in Stop Mode to write to most registers