EV3-G API GyroSensor (#387)

* EV3-G API GyroSensor

* Drop 'raw' variable, minor cleanup

Author: dwalton76

ev3dev/core.py

@@ -243,7 +243,9 @@ def _set_attribute(self, attribute, name, value):
                 else:
                     attribute.seek(0)
 
-                attribute.write(value.encode())
+                if isinstance(value, str):
+                    value = value.encode()
+                attribute.write(value)
                 attribute.flush()
             except Exception as ex:
                 self._raise_friendly_access_error(ex, name)
@@ -279,6 +281,9 @@ def get_attr_int(self, attribute, name):
     def set_attr_int(self, attribute, name, value):
         return self._set_attribute(attribute, name, str(int(value)))
 
+    def set_attr_raw(self, attribute, name, value):
+        return self._set_attribute(attribute, name, value)
+
     def get_attr_string(self, attribute, name):
         return self._get_attribute(attribute, name)
 
@@ -2566,13 +2571,9 @@ class GyroSensor(Sensor):
     """
     LEGO EV3 gyro sensor.
     """
-
     SYSTEM_CLASS_NAME = Sensor.SYSTEM_CLASS_NAME
     SYSTEM_DEVICE_NAME_CONVENTION = Sensor.SYSTEM_DEVICE_NAME_CONVENTION
 
-    def __init__(self, address=None, name_pattern=SYSTEM_DEVICE_NAME_CONVENTION, name_exact=False, **kwargs):
-        super(GyroSensor, self).__init__(address, name_pattern, name_exact, driver_name=['lego-ev3-gyro'], **kwargs)
-
     #: Angle
     MODE_GYRO_ANG = 'GYRO-ANG'
 
@@ -2588,15 +2589,25 @@ def __init__(self, address=None, name_pattern=SYSTEM_DEVICE_NAME_CONVENTION, nam
     #: Calibration ???
     MODE_GYRO_CAL = 'GYRO-CAL'
 
+    # Newer versions of the Gyro sensor also have an additional second axis
+    # accessible via the TILT-ANGLE and TILT-RATE modes that is not usable
+    # using the official EV3-G blocks
+    MODE_TILT_ANG = 'TILT-ANGLE'
+    MODE_TILT_RATE = 'TILT-RATE'
 
     MODES = (
-      'GYRO-ANG',
-      'GYRO-RATE',
-      'GYRO-FAS',
-      'GYRO-G&A',
-      'GYRO-CAL',
+        MODE_GYRO_ANG,
+        MODE_GYRO_RATE,
+        MODE_GYRO_FAS,
+        MODE_GYRO_G_A,
+        MODE_GYRO_CAL,
+        MODE_TILT_ANG,
+        MODE_TILT_RATE,
     )
 
+    def __init__(self, address=None, name_pattern=SYSTEM_DEVICE_NAME_CONVENTION, name_exact=False, **kwargs):
+        super(GyroSensor, self).__init__(address, name_pattern, name_exact, driver_name=['lego-ev3-gyro'], **kwargs)
+        self._direct = None
 
     @property
     def angle(self):
@@ -2623,6 +2634,20 @@ def rate_and_angle(self):
         self.mode = self.MODE_GYRO_G_A
         return self.value(0), self.value(1)
 
+    @property
+    def tilt_angle(self):
+        self.mode = self.MODE_TILT_ANG
+        return self.value(0)
+
+    @property
+    def tilt_rate(self):
+        self.mode = self.MODE_TILT_RATE
+        return self.value(0)
+
+    def reset(self):
+        self.mode = self.MODE_GYRO_ANG
+        self._direct = self.set_attr_raw(self._direct, 'direct', 17)
+
 
 class ButtonBase(object):
     """