1/*
2 * Copyright (C) 2015 Intel Corporation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef GROVE_LIGHT_HPP
18#define GROVE_LIGHT_HPP
19
20#include <hardware/sensors.h>
21#include "Sensor.hpp"
22#include "grove.h"
23
24struct sensors_event_t;
25
26/**
27 * GroveLight exposes the Grove Light sensor
28 *
29 * Overrides the pollEvents & activate Sensor methods.
30 */
31class GroveLight : public Sensor, public upm::GroveLight {
32  public:
33    /**
34     * GroveLight constructor
35     * @param pollFd poll file descriptor
36     * @param pin number of the analog input
37     */
38    GroveLight(int pollFd, int pin);
39
40    /**
41     * GroveLight destructor
42     */
43    ~GroveLight() override;
44
45    /**
46     * Poll for events
47     * @param data where to store the events
48     * @param count the number of events returned must be <= to the count
49     * @return number of events returned in data on success and a negative error number otherwise
50     */
51    int pollEvents(sensors_event_t* data, int count) override;
52
53    /**
54     * Activate the sensor
55     * @param handle sensor identifier
56     * @param enabled 1 for enabling and 0 for disabling
57     * @return 0 on success and a negative error number otherwise
58     */
59    int activate(int handle, int enabled);
60
61  private:
62    static Sensor * createSensor(int pollFd);
63    static void initModule() __attribute__((constructor
64        (DEFAULT_SENSOR_CONSTRUCTOR_PRIORITY)));
65
66    int pollFd;
67    static struct sensor_t sensorDescription;
68};
69
70#endif  // GROVE_LIGHT_HPP
71