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libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.h
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libraries/Adafruit_Unified_Sensor/Adafruit_Sensor.h
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/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software< /span>
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* Update by K. Townsend (Adafruit Industries) for lighter typedefs, and
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* extended sensor support to include color, voltage and current */
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#ifndef _ADAFRUIT_SENSOR_H
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#define _ADAFRUIT_SENSOR_H
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#ifndef ARDUINO
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#include <stdint.h>
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#elif ARDUINO >= 100
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#include "Arduino.h"
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#include "Print.h"
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#else
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#include "WProgram.h"
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#endif
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/* Constants */
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#define SENSORS_GRAVITY_EARTH (9.80665F) /**< Earth's gravity in m/s^2 */
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#define SENSORS_GRAVITY_MOON (1.6F) /**< The moon's gravity in m/s^2 */
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#define SENSORS_GRAVITY_SUN (275.0F) /**< The sun's gravity in m/s^2 */
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#define SENSORS_GRAVITY_STANDARD (SENSORS_GRAVITY_EARTH)
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#define SENSORS_MAGFIELD_EARTH_MAX \
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(60.0F) /**< Maximum magnetic field on Earth's surface */
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#define SENSORS_MAGFIELD_EARTH_MIN \
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(30.0F) /**< Minimum magnetic field on Earth's surface */
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#define SENSORS_PRESSURE_SEALEVELHPA \
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(1013.25F) /**< Average sea level pressure is 1013.25 hPa */
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#define SENSORS_DPS_TO_RADS \
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(0.017453293F) /**< Degrees/s to rad/s multiplier \
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*/
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#define SENSORS_RADS_TO_DPS \
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(57.29577793F) /**< Rad/s to degrees/s multiplier */
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#define SENSORS_GAUSS_TO_MICROTESLA \
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(100) /**< Gauss to micro-Tesla multiplier */
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/** Sensor types */
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typedef enum {
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SENSOR_TYPE_ACCELEROMETER = (1), /**< Gravity + linear acceleration */
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SENSOR_TYPE_MAGNETIC_FIELD = (2),
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SENSOR_TYPE_ORIENTATION = (3),
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SENSOR_TYPE_GYROSCOPE = (4),
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SENSOR_TYPE_LIGHT = (5),
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SENSOR_TYPE_PRESSURE = (6),
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SENSOR_TYPE_PROXIMITY = (8),
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SENSOR_TYPE_GRAVITY = (9),
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SENSOR_TYPE_LINEAR_ACCELERATION =
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(10), /**< Acceleration not including gravity */
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SENSOR_TYPE_ROTATION_VECTOR = (11),
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SENSOR_TYPE_RELATIVE_HUMIDITY = (12),
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SENSOR_TYPE_AMBIENT_TEMPERATURE = (13),
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SENSOR_TYPE_OBJECT_TEMPERATURE = (14),
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SENSOR_TYPE_VOLTAGE = (15),
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SENSOR_TYPE_CURRENT = (16),
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SENSOR_TYPE_COLOR = (17),
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SENSOR_TYPE_TVOC = (18),
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SENSOR_TYPE_VOC_INDEX = (19),
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SENSOR_TYPE_NOX_INDEX = (20),
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SENSOR_TYPE_CO2 = (21),
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SENSOR_TYPE_ECO2 = (22),
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SENSOR_TYPE_PM10_STD = (23),
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SENSOR_TYPE_PM25_STD = (24),
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SENSOR_TYPE_PM100_STD = (25),
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SENSOR_TYPE_PM10_ENV = (26),
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SENSOR_TYPE_PM25_ENV = (27),
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SENSOR_TYPE_PM100_ENV = (28),
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SENSOR_TYPE_GAS_RESISTANCE = (29),
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SENSOR_TYPE_UNITLESS_PERCENT = (30),
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SENSOR_TYPE_ALTITUDE = (31)
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} sensors_type_t;
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/** struct sensors_vec_s is used to return a vector in a common format. */
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typedef struct {
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union {
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float v[3]; ///< 3D vector elements
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struct {
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float x; ///< X component of vector
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float y; ///< Y component of vector
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float z; ///< Z component of vector
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}; ///< Struct for holding XYZ component
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/* Orientation sensors */
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struct {
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float roll; /**< Rotation around the longitudinal axis (the plane body, 'X
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axis'). Roll is positive and increasing when moving
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downward. -90 degrees <= roll <= 90 degrees */
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float pitch; /**< Rotation around the lateral axis (the wing span, 'Y
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axis'). Pitch is positive and increasing when moving
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upwards. -180 degrees <= pitch <= 180 degrees) */
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float heading; /**< Angle between the longitudinal axis (the plane body)
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and magnetic north, measured clockwise when viewing from
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the top of the device. 0-359 degrees */
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}; ///< Struct for holding roll/pitch/heading
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}; ///< Union that can hold 3D vector array, XYZ components or
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///< roll/pitch/heading
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int8_t status; ///< Status byte
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uint8_t reserved[3]; ///< Reserved
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} sensors_vec_t;
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/** struct sensors_color_s is used to return color data in a common format. */
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typedef struct {
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union {
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float c[3]; ///< Raw 3-element data
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/* RGB color space */
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struct {
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float r; /**< Red component */
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float g; /**< Green component */
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float b; /**< Blue component */
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}; ///< RGB data in floating point notation
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}; ///< Union of various ways to describe RGB colorspace
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uint32_t rgba; /**< 24-bit RGBA value */
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} sensors_color_t;
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/* Sensor event (36 bytes) */
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/** struct sensor_event_s is used to provide a single sensor event in a common
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* format. */
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typedef struct {
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int32_t version; /**< must be sizeof(struct sensors_event_t) */
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int32_t sensor_id; /**< unique sensor identifier */
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int32_t type; /**< sensor type */
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int32_t reserved0; /**< reserved */
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int32_t timestamp; /**< time is in milliseconds */
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union {
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float data[4]; ///< Raw data */
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sensors_vec_t acceleration; /**< acceleration values are in meter per second
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per second (m/s^2) */
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sensors_vec_t
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magnetic; /**< magnetic vector values are in micro-Tesla (uT) */
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sensors_vec_t orientation; /**< orientation values are in degrees */
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sensors_vec_t gyro; /**< gyroscope values are in rad/s */
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float temperature; /**< temperature is in degrees centigrade (Celsius) */
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float distance; /**< distance in centimeters */
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float light; /**< light in SI lux units */
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float pressure; /**< pressure in hectopascal (hPa) */
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float relative_humidity; /**< relative humidity in percent */
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float current; /**< current in milliamps (mA) */
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float voltage; /**< voltage in volts (V) */
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float tvoc; /**< Total Volatile Organic Compounds, in ppb */
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float voc_index; /**< VOC (Volatile Organic Compound) index where 100 is
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normal (unitless) */
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float nox_index; /**< NOx (Nitrogen Oxides) index where 100 is normal
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(unitless) */
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float CO2; /**< Measured CO2 in parts per million (ppm) */
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float eCO2; /**< equivalent/estimated CO2 in parts per million (ppm
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estimated from some other measurement) */
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float pm10_std; /**< Standard Particulate Matter <=1.0 in parts per million
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(ppm) */
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float pm25_std; /**< Standard Particulate Matter <=2.5 in parts per million
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(ppm) */
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float pm100_std; /**< Standard Particulate Matter <=10.0 in parts per
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million (ppm) */
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float pm10_env; /**< Environmental Particulate Matter <=1.0 in parts per
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million (ppm) */
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float pm25_env; /**< Environmental Particulate Matter <=2.5 in parts per
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million (ppm) */
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float pm100_env; /**< Environmental Particulate Matter <=10.0 in parts per
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million (ppm) */
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float gas_resistance; /**< Proportional to the amount of VOC particles in
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the air (Ohms) */
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float unitless_percent; /**<Percentage, unit-less (%) */
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sensors_color_t color; /**< color in RGB component values */
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float altitude; /**< Distance between a reference datum and a point or
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object, in meters. */
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}; ///< Union for the wide ranges of data we can carry
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} sensors_event_t;
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/* Sensor details (40 bytes) */
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/** struct sensor_s is used to describe basic information about a specific
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* sensor. */
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typedef struct {
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char name[12]; /**< sensor name */
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int32_t version; /**< version of the hardware + driver */
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int32_t sensor_id; /**< unique sensor identifier */
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int32_t type; /**< this sensor's type (ex. SENSOR_TYPE_LIGHT) */
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float max_value; /**< maximum value of this sensor's value in SI units */
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float min_value; /**< minimum value of this sensor's value in SI units */
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float resolution; /**< smallest difference between two values reported by this
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sensor */
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int32_t min_delay; /**< min delay in microseconds between events. zero = not a
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constant rate */
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} sensor_t;
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/** @brief Common sensor interface to unify various sensors.
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* Intentionally modeled after sensors.h in the Android API:
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* https://github.com/android/platform_hardware_libhardware/blob/master/include/hardware/sensors.h
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*/
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class Adafruit_Sensor {
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public:
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// Constructor(s)
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Adafruit_Sensor() {}
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virtual ~Adafruit_Sensor() {}
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// These must be defined by the subclass
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/*! @brief Whether we should automatically change the range (if possible) for
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higher precision
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@param enabled True if we will try to autorange */
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virtual void enableAutoRange(bool enabled) {
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(void)enabled; /* suppress unused warning */
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};
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/*! @brief Get the latest sensor event
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@returns True if able to fetch an event */
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virtual bool getEvent(sensors_event_t *) = 0;
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/*! @brief Get info about the sensor itself */
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virtual void getSensor(sensor_t *) = 0;
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void printSensorDetails(void);
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};
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#endif
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