Add nazoru-input in mozc-nazoru/

mozc-nazoru/src/nazoru/led.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# vim: set fileencoding=utf-8 :
+#
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+class LEDBase():
+  def __init__(self, pin):
+    self._pin = pin
+  def on(self):
+    pass
+  def off(self):
+    pass
+  def blink(self, interval):
+    pass
+
+try:
+  import RPi.GPIO as GPIO
+  import threading
+
+  class LED(LEDBase):
+    ON = 'ON'
+    OFF = 'OFF'
+
+    def __init__(self, pin):
+      GPIO.setmode(GPIO.BOARD)
+      self._pin = pin
+      self._lock = threading.Lock()
+      self._timer = None
+      GPIO.setup(pin, GPIO.OUT)
+      self.off()
+
+    def on(self):
+      with self._lock:
+        self._state = self.ON
+        GPIO.output(self._pin, False)
+        self._ensure_stop_timer()
+
+    def off(self):
+      with self._lock:
+        self._state = self.OFF
+        GPIO.output(self._pin, True)
+        self._ensure_stop_timer()
+
+    def blink(self, interval):
+      self._ensure_stop_timer()
+      def toggle():
+        self._timer = None
+        if self._state == self.ON:
+          self.off()
+        else:
+          self.on()
+        self._timer = threading.Timer(interval, toggle)
+        self._timer.daemon = True
+        self._timer.start()
+      toggle()
+
+    def _ensure_stop_timer(self):
+      if self._timer is not None:
+        self._timer.cancel()
+        self._timer = None
+
+except ImportError as e:
+  import sys
+
+  class LED(LEDBase):
+    pass
+
+LED_BLUE = LED(38)
+LED_RED = LED(40)