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platform_hardware_libhardware/include/hardware/sensors.h
Peng Xu 0743a5ceeb Implementation of sensor additional info report 
This implements a mechanism for sensor hardware/HAL to deliver additional information beside sensor
readings to application. It includes internal temperature reading, untracked delay of sample,
location and pose of sensor device placement in phone frame, etc. This is also a very expandable
frame to account for future need.

Change-Id: I9463930ad1eaac2d9b506ebaabd19bc092604e8f
2016-01-27 21:20:07 -08:00

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.
*/
#ifndef ANDROID_SENSORS_INTERFACE_H
#define ANDROID_SENSORS_INTERFACE_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <hardware/hardware.h>
#include <cutils/native_handle.h>
__BEGIN_DECLS
/*****************************************************************************/
#define SENSORS_HEADER_VERSION 1
#define SENSORS_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1)
#define SENSORS_DEVICE_API_VERSION_0_1 HARDWARE_DEVICE_API_VERSION_2(0, 1, SENSORS_HEADER_VERSION)
#define SENSORS_DEVICE_API_VERSION_1_0 HARDWARE_DEVICE_API_VERSION_2(1, 0, SENSORS_HEADER_VERSION)
#define SENSORS_DEVICE_API_VERSION_1_1 HARDWARE_DEVICE_API_VERSION_2(1, 1, SENSORS_HEADER_VERSION)
#define SENSORS_DEVICE_API_VERSION_1_2 HARDWARE_DEVICE_API_VERSION_2(1, 2, SENSORS_HEADER_VERSION)
#define SENSORS_DEVICE_API_VERSION_1_3 HARDWARE_DEVICE_API_VERSION_2(1, 3, SENSORS_HEADER_VERSION)
#define SENSORS_DEVICE_API_VERSION_1_4 HARDWARE_DEVICE_API_VERSION_2(1, 4, SENSORS_HEADER_VERSION)
/**
* Please see the Sensors section of source.android.com for an
* introduction to and detailed descriptions of Android sensor types:
* http://source.android.com/devices/sensors/index.html
*/
/**
* The id of this module
*/
#define SENSORS_HARDWARE_MODULE_ID "sensors"
/**
* Name of the sensors device to open
*/
#define SENSORS_HARDWARE_POLL "poll"
/**
* Handles must be higher than SENSORS_HANDLE_BASE and must be unique.
* A Handle identifies a given sensors. The handle is used to activate
* and/or deactivate sensors.
* In this version of the API there can only be 256 handles.
*/
#define SENSORS_HANDLE_BASE 0
#define SENSORS_HANDLE_BITS 8
#define SENSORS_HANDLE_COUNT (1<<SENSORS_HANDLE_BITS)
/*
* **** Deprecated *****
* flags for (*batch)()
* Availability: SENSORS_DEVICE_API_VERSION_1_0
* see (*batch)() documentation for details.
* Deprecated as of SENSORS_DEVICE_API_VERSION_1_3.
* WAKE_UP_* sensors replace WAKE_UPON_FIFO_FULL concept.
*/
enum {
SENSORS_BATCH_DRY_RUN = 0x00000001,
SENSORS_BATCH_WAKE_UPON_FIFO_FULL = 0x00000002
};
/*
* what field for meta_data_event_t
*/
enum {
/* a previous flush operation has completed */
META_DATA_FLUSH_COMPLETE = 1,
META_DATA_VERSION /* always last, leave auto-assigned */
};
/*
* The permission to use for body sensors (like heart rate monitors).
* See sensor types for more details on what sensors should require this
* permission.
*/
#define SENSOR_PERMISSION_BODY_SENSORS "android.permission.BODY_SENSORS"
/*
* Availability: SENSORS_DEVICE_API_VERSION_1_4
* Sensor HAL modes used in set_operation_mode method
*/
enum {
/*
* Operating modes for the HAL.
*/
/*
* Normal mode operation. This is the default state of operation.
* The HAL shall initialize into this mode on device startup.
*/
SENSOR_HAL_NORMAL_MODE = 0,
/*
* Data Injection mode. In this mode, the device shall not source data from the
* physical sensors as it would in normal mode. Instead sensor data is
* injected by the sensor service.
*/
SENSOR_HAL_DATA_INJECTION_MODE = 0x1
};
/*
* Availability: SENSORS_DEVICE_API_VERSION_1_3
* Sensor flags used in sensor_t.flags.
*/
enum {
/*
* Whether this sensor wakes up the AP from suspend mode when data is available. Whenever
* sensor events are delivered from a wake_up sensor, the driver needs to hold a wake_lock till
* the events are read by the SensorService i.e till sensors_poll_device_t.poll() is called the
* next time. Once poll is called again it means events have been read by the SensorService, the
* driver can safely release the wake_lock. SensorService will continue to hold a wake_lock till
* the app actually reads the events.
*/
SENSOR_FLAG_WAKE_UP = 1U << 0,
/*
* Reporting modes for various sensors. Each sensor will have exactly one of these modes set.
* The least significant 2nd, 3rd and 4th bits are used to represent four possible reporting
* modes.
*/
SENSOR_FLAG_CONTINUOUS_MODE = 0, // 0000
SENSOR_FLAG_ON_CHANGE_MODE = 0x2, // 0010
SENSOR_FLAG_ONE_SHOT_MODE = 0x4, // 0100
SENSOR_FLAG_SPECIAL_REPORTING_MODE = 0x6, // 0110
/*
* Set this flag if the sensor supports data_injection mode and allows data to be injected
* from the SensorService. When in data_injection ONLY sensors with this flag set are injected
* sensor data and only sensors with this flag set are activated. Eg: Accelerometer and Step
* Counter sensors can be set with this flag and SensorService will inject accelerometer data
* and read the corresponding step counts.
*/
SENSOR_FLAG_SUPPORTS_DATA_INJECTION = 0x10 // 1 0000
};
/*
* Mask and shift for reporting mode sensor flags defined above.
*/
#define REPORTING_MODE_MASK (0xE)
#define REPORTING_MODE_SHIFT (1)
/*
* Mask and shift for data_injection mode sensor flags defined above.
*/
#define DATA_INJECTION_MASK (0x10)
#define DATA_INJECTION_SHIFT (4)
/*
* Sensor type
*
* Each sensor has a type which defines what this sensor measures and how
* measures are reported. See the Base sensors and Composite sensors lists
* for complete descriptions:
* http://source.android.com/devices/sensors/base_triggers.html
* http://source.android.com/devices/sensors/composite_sensors.html
*
* Device manufacturers (OEMs) can define their own sensor types, for
* their private use by applications or services provided by them. Such
* sensor types are specific to an OEM and can't be exposed in the SDK.
* These types must start at SENSOR_TYPE_DEVICE_PRIVATE_BASE.
*
* All sensors defined outside of the device private range must correspond to
* a type defined in this file, and must satisfy the characteristics listed in
* the description of the sensor type.
*
* Starting with version SENSORS_DEVICE_API_VERSION_1_2, each sensor also
* has a stringType.
* - StringType of sensors inside of the device private range MUST be prefixed
* by the sensor provider's or OEM reverse domain name. In particular, they
* cannot use the "android.sensor" prefix.
* - StringType of sensors outside of the device private range MUST correspond
* to the one defined in this file (starting with "android.sensor").
* For example, accelerometers must have
* type=SENSOR_TYPE_ACCELEROMETER and
* stringType=SENSOR_STRING_TYPE_ACCELEROMETER
*
* When android introduces a new sensor type that can replace an OEM-defined
* sensor type, the OEM must use the official sensor type and stringType on
* versions of the HAL that support this new official sensor type.
*
* Example (made up): Suppose Google's Glass team wants to surface a sensor
* detecting that Glass is on a head.
* - Such a sensor is not officially supported in android KitKat
* - Glass devices launching on KitKat can implement a sensor with
* type = 0x10001 and stringType = "com.google.glass.onheaddetector"
* - In L android release, if android decides to define
* SENSOR_TYPE_ON_HEAD_DETECTOR and STRING_SENSOR_TYPE_ON_HEAD_DETECTOR,
* those types should replace the Glass-team-specific types in all future
* launches.
* - When launching Glass on the L release, Google should now use the official
* type (SENSOR_TYPE_ON_HEAD_DETECTOR) and stringType.
* - This way, all applications can now use this sensor.
*/
/*
* Base for device manufacturers private sensor types.
* These sensor types can't be exposed in the SDK.
*/
#define SENSOR_TYPE_DEVICE_PRIVATE_BASE 0x10000
/*
* SENSOR_TYPE_META_DATA
* reporting-mode: n/a
* wake-up sensor: n/a
*
* NO SENSOR OF THAT TYPE MUST BE RETURNED (*get_sensors_list)()
*
* SENSOR_TYPE_META_DATA is a special token used to populate the
* sensors_meta_data_event structure. It doesn't correspond to a physical
* sensor. sensors_meta_data_event are special, they exist only inside
* the HAL and are generated spontaneously, as opposed to be related to
* a physical sensor.
*
* sensors_meta_data_event_t.version must be META_DATA_VERSION
* sensors_meta_data_event_t.sensor must be 0
* sensors_meta_data_event_t.type must be SENSOR_TYPE_META_DATA
* sensors_meta_data_event_t.reserved must be 0
* sensors_meta_data_event_t.timestamp must be 0
*
* The payload is a meta_data_event_t, where:
* meta_data_event_t.what can take the following values:
*
* META_DATA_FLUSH_COMPLETE
* This event indicates that a previous (*flush)() call has completed for the sensor
* handle specified in meta_data_event_t.sensor.
* see (*flush)() for more details
*
* All other values for meta_data_event_t.what are reserved and
* must not be used.
*
*/
#define SENSOR_TYPE_META_DATA (0)
/*
* Wake up sensors.
* Each sensor may have either or both a wake-up and a non-wake variant.
* When registered in batch mode, wake-up sensors will wake up the AP when
* their FIFOs are full or when the batch timeout expires. A separate FIFO has
* to be maintained for wake up sensors and non wake up sensors. The non wake-up
* sensors need to overwrite their FIFOs when they are full till the AP wakes up
* and the wake-up sensors will wake-up the AP when their FIFOs are full or when
* the batch timeout expires without losing events. Wake-up and non wake-up variants
* of each sensor can be activated at different rates independently of each other.
*
* Note: Proximity sensor and significant motion sensor which were defined in previous
* releases are also wake-up sensors and should be treated as such. Wake-up one-shot
* sensors like SIGNIFICANT_MOTION cannot be batched, hence the text about batch above
* doesn't apply to them. See the definitions of SENSOR_TYPE_PROXIMITY and
* SENSOR_TYPE_SIGNIFICANT_MOTION for more info.
*
* Set SENSOR_FLAG_WAKE_UP flag for all wake-up sensors.
*
* For example, A device can have two sensors both of SENSOR_TYPE_ACCELEROMETER and
* one of them can be a wake_up sensor (with SENSOR_FLAG_WAKE_UP flag set) and the other
* can be a regular non wake_up sensor. Both of these sensors must be activated/deactivated
* independently of the other.
*/
/*
* SENSOR_TYPE_ACCELEROMETER
* reporting-mode: continuous
*
* All values are in SI units (m/s^2) and measure the acceleration of the
* device minus the force of gravity.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_ACCELEROMETER (1)
#define SENSOR_STRING_TYPE_ACCELEROMETER "android.sensor.accelerometer"
/*
* SENSOR_TYPE_GEOMAGNETIC_FIELD
* reporting-mode: continuous
*
* All values are in micro-Tesla (uT) and measure the geomagnetic
* field in the X, Y and Z axis.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_GEOMAGNETIC_FIELD (2)
#define SENSOR_TYPE_MAGNETIC_FIELD SENSOR_TYPE_GEOMAGNETIC_FIELD
#define SENSOR_STRING_TYPE_MAGNETIC_FIELD "android.sensor.magnetic_field"
/*
* SENSOR_TYPE_ORIENTATION
* reporting-mode: continuous
*
* All values are angles in degrees.
*
* Orientation sensors return sensor events for all 3 axes at a constant
* rate defined by setDelay().
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_ORIENTATION (3)
#define SENSOR_STRING_TYPE_ORIENTATION "android.sensor.orientation"
/*
* SENSOR_TYPE_GYROSCOPE
* reporting-mode: continuous
*
* All values are in radians/second and measure the rate of rotation
* around the X, Y and Z axis.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_GYROSCOPE (4)
#define SENSOR_STRING_TYPE_GYROSCOPE "android.sensor.gyroscope"
/*
* SENSOR_TYPE_LIGHT
* reporting-mode: on-change
*
* The light sensor value is returned in SI lux units.
*
* Both wake-up and non wake-up versions are useful.
*/
#define SENSOR_TYPE_LIGHT (5)
#define SENSOR_STRING_TYPE_LIGHT "android.sensor.light"
/*
* SENSOR_TYPE_PRESSURE
* reporting-mode: continuous
*
* The pressure sensor return the athmospheric pressure in hectopascal (hPa)
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_PRESSURE (6)
#define SENSOR_STRING_TYPE_PRESSURE "android.sensor.pressure"
/* SENSOR_TYPE_TEMPERATURE is deprecated in the HAL */
#define SENSOR_TYPE_TEMPERATURE (7)
#define SENSOR_STRING_TYPE_TEMPERATURE "android.sensor.temperature"
/*
* SENSOR_TYPE_PROXIMITY
* reporting-mode: on-change
*
* The proximity sensor which turns the screen off and back on during calls is the
* wake-up proximity sensor. Implement wake-up proximity sensor before implementing
* a non wake-up proximity sensor. For the wake-up proximity sensor set the flag
* SENSOR_FLAG_WAKE_UP.
* The value corresponds to the distance to the nearest object in centimeters.
*/
#define SENSOR_TYPE_PROXIMITY (8)
#define SENSOR_STRING_TYPE_PROXIMITY "android.sensor.proximity"
/*
* SENSOR_TYPE_GRAVITY
* reporting-mode: continuous
*
* A gravity output indicates the direction of and magnitude of gravity in
* the devices's coordinates.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_GRAVITY (9)
#define SENSOR_STRING_TYPE_GRAVITY "android.sensor.gravity"
/*
* SENSOR_TYPE_LINEAR_ACCELERATION
* reporting-mode: continuous
*
* Indicates the linear acceleration of the device in device coordinates,
* not including gravity.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_LINEAR_ACCELERATION (10)
#define SENSOR_STRING_TYPE_LINEAR_ACCELERATION "android.sensor.linear_acceleration"
/*
* SENSOR_TYPE_ROTATION_VECTOR
* reporting-mode: continuous
*
* The rotation vector symbolizes the orientation of the device relative to the
* East-North-Up coordinates frame.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_ROTATION_VECTOR (11)
#define SENSOR_STRING_TYPE_ROTATION_VECTOR "android.sensor.rotation_vector"
/*
* SENSOR_TYPE_RELATIVE_HUMIDITY
* reporting-mode: on-change
*
* A relative humidity sensor measures relative ambient air humidity and
* returns a value in percent.
*
* Both wake-up and non wake-up versions are useful.
*/
#define SENSOR_TYPE_RELATIVE_HUMIDITY (12)
#define SENSOR_STRING_TYPE_RELATIVE_HUMIDITY "android.sensor.relative_humidity"
/*
* SENSOR_TYPE_AMBIENT_TEMPERATURE
* reporting-mode: on-change
*
* The ambient (room) temperature in degree Celsius.
*
* Both wake-up and non wake-up versions are useful.
*/
#define SENSOR_TYPE_AMBIENT_TEMPERATURE (13)
#define SENSOR_STRING_TYPE_AMBIENT_TEMPERATURE "android.sensor.ambient_temperature"
/*
* SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED
* reporting-mode: continuous
*
* Similar to SENSOR_TYPE_MAGNETIC_FIELD, but the hard iron calibration is
* reported separately instead of being included in the measurement.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED (14)
#define SENSOR_STRING_TYPE_MAGNETIC_FIELD_UNCALIBRATED "android.sensor.magnetic_field_uncalibrated"
/*
* SENSOR_TYPE_GAME_ROTATION_VECTOR
* reporting-mode: continuous
*
* Similar to SENSOR_TYPE_ROTATION_VECTOR, but not using the geomagnetic
* field.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_GAME_ROTATION_VECTOR (15)
#define SENSOR_STRING_TYPE_GAME_ROTATION_VECTOR "android.sensor.game_rotation_vector"
/*
* SENSOR_TYPE_GYROSCOPE_UNCALIBRATED
* reporting-mode: continuous
*
* All values are in radians/second and measure the rate of rotation
* around the X, Y and Z axis.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_GYROSCOPE_UNCALIBRATED (16)
#define SENSOR_STRING_TYPE_GYROSCOPE_UNCALIBRATED "android.sensor.gyroscope_uncalibrated"
/*
* SENSOR_TYPE_SIGNIFICANT_MOTION
* reporting-mode: one-shot
*
* A sensor of this type triggers an event each time significant motion
* is detected and automatically disables itself.
* For Significant Motion sensor to be useful, it must be defined as a
* wake-up sensor. (set SENSOR_FLAG_WAKE_UP). Implement the wake-up significant motion
* sensor. A non wake-up version is not useful.
* The only allowed value to return is 1.0.
*/
#define SENSOR_TYPE_SIGNIFICANT_MOTION (17)
#define SENSOR_STRING_TYPE_SIGNIFICANT_MOTION "android.sensor.significant_motion"
/*
* SENSOR_TYPE_STEP_DETECTOR
* reporting-mode: special
*
* A sensor of this type triggers an event each time a step is taken
* by the user. The only allowed value to return is 1.0 and an event
* is generated for each step.
*
* Both wake-up and non wake-up versions are useful.
*/
#define SENSOR_TYPE_STEP_DETECTOR (18)
#define SENSOR_STRING_TYPE_STEP_DETECTOR "android.sensor.step_detector"
/*
* SENSOR_TYPE_STEP_COUNTER
* reporting-mode: on-change
*
* A sensor of this type returns the number of steps taken by the user since
* the last reboot while activated. The value is returned as a uint64_t and is
* reset to zero only on a system / android reboot.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_STEP_COUNTER (19)
#define SENSOR_STRING_TYPE_STEP_COUNTER "android.sensor.step_counter"
/*
* SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR
* reporting-mode: continuous
*
* Similar to SENSOR_TYPE_ROTATION_VECTOR, but using a magnetometer instead
* of using a gyroscope.
*
* Implement the non-wake-up version of this sensor and implement the wake-up
* version if the system possesses a wake up fifo.
*/
#define SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR (20)
#define SENSOR_STRING_TYPE_GEOMAGNETIC_ROTATION_VECTOR "android.sensor.geomagnetic_rotation_vector"
/*
* SENSOR_TYPE_HEART_RATE
* reporting-mode: on-change
*
* A sensor of this type returns the current heart rate.
* The events contain the current heart rate in beats per minute (BPM) and the
* status of the sensor during the measurement. See heart_rate_event_t for more
* details.
*
* Because this sensor is on-change, events must be generated when and only
* when heart_rate.bpm or heart_rate.status have changed since the last
* event. In particular, upon the first activation, unless the device is known
* to not be on the body, the status field of the first event must be set to
* SENSOR_STATUS_UNRELIABLE. The event should be generated no faster than every
* period_ns passed to setDelay() or to batch().
* See the definition of the on-change reporting mode for more information.
*
* sensor_t.requiredPermission must be set to SENSOR_PERMISSION_BODY_SENSORS.
*
* Both wake-up and non wake-up versions are useful.
*/
#define SENSOR_TYPE_HEART_RATE (21)
#define SENSOR_STRING_TYPE_HEART_RATE "android.sensor.heart_rate"
/*
* SENSOR_TYPE_WAKE_UP_TILT_DETECTOR
* reporting-mode: special (setDelay has no impact)
*
* A sensor of this type generates an event each time a tilt event is detected. A tilt event
* should be generated if the direction of the 2-seconds window average gravity changed by at least
* 35 degrees since the activation or the last trigger of the sensor.
* reference_estimated_gravity = average of accelerometer measurements over the first
* 1 second after activation or the estimated gravity at the last
* trigger.
* current_estimated_gravity = average of accelerometer measurements over the last 2 seconds.
* trigger when angle (reference_estimated_gravity, current_estimated_gravity) > 35 degrees
*
* Large accelerations without a change in phone orientation should not trigger a tilt event.
* For example, a sharp turn or strong acceleration while driving a car should not trigger a tilt
* event, even though the angle of the average acceleration might vary by more than 35 degrees.
*
* Typically, this sensor is implemented with the help of only an accelerometer. Other sensors can
* be used as well if they do not increase the power consumption significantly. This is a low power
* sensor that should allow the AP to go into suspend mode. Do not emulate this sensor in the HAL.
* Like other wake up sensors, the driver is expected to a hold a wake_lock with a timeout of 200 ms
* while reporting this event. The only allowed return value is 1.0.
*
* Implement only the wake-up version of this sensor.
*/
#define SENSOR_TYPE_TILT_DETECTOR (22)
#define SENSOR_STRING_TYPE_TILT_DETECTOR "android.sensor.tilt_detector"
/*
* SENSOR_TYPE_WAKE_GESTURE
* reporting-mode: one-shot
*
* A sensor enabling waking up the device based on a device specific motion.
*
* When this sensor triggers, the device behaves as if the power button was
* pressed, turning the screen on. This behavior (turning on the screen when
* this sensor triggers) might be deactivated by the user in the device
* settings. Changes in settings do not impact the behavior of the sensor:
* only whether the framework turns the screen on when it triggers.
*
* The actual gesture to be detected is not specified, and can be chosen by
* the manufacturer of the device.
* This sensor must be low power, as it is likely to be activated 24/7.
* The only allowed value to return is 1.0.
*
* Implement only the wake-up version of this sensor.
*/
#define SENSOR_TYPE_WAKE_GESTURE (23)
#define SENSOR_STRING_TYPE_WAKE_GESTURE "android.sensor.wake_gesture"
/*
* SENSOR_TYPE_GLANCE_GESTURE
* reporting-mode: one-shot
*
* A sensor enabling briefly turning the screen on to enable the user to
* glance content on screen based on a specific motion. The device should
* turn the screen off after a few moments.
*
* When this sensor triggers, the device turns the screen on momentarily
* to allow the user to glance notifications or other content while the
* device remains locked in a non-interactive state (dozing). This behavior
* (briefly turning on the screen when this sensor triggers) might be deactivated
* by the user in the device settings. Changes in settings do not impact the
* behavior of the sensor: only whether the framework briefly turns the screen on
* when it triggers.
*
* The actual gesture to be detected is not specified, and can be chosen by
* the manufacturer of the device.
* This sensor must be low power, as it is likely to be activated 24/7.
* The only allowed value to return is 1.0.
*
* Implement only the wake-up version of this sensor.
*/
#define SENSOR_TYPE_GLANCE_GESTURE (24)
#define SENSOR_STRING_TYPE_GLANCE_GESTURE "android.sensor.glance_gesture"
/**
* SENSOR_TYPE_PICK_UP_GESTURE
* reporting-mode: one-shot
*
* A sensor of this type triggers when the device is picked up regardless of wherever is was
* before (desk, pocket, bag). The only allowed return value is 1.0.
* This sensor de-activates itself immediately after it triggers.
*
* Implement only the wake-up version of this sensor.
*/
#define SENSOR_TYPE_PICK_UP_GESTURE (25)
#define SENSOR_STRING_TYPE_PICK_UP_GESTURE "android.sensor.pick_up_gesture"
/*
* SENSOR_TYPE_WRIST_TILT_GESTURE
* trigger-mode: special
* wake-up sensor: yes
*
* A sensor of this type triggers an event each time a tilt of the wrist-worn
* device is detected.
*
* This sensor must be low power, as it is likely to be activated 24/7.
* The only allowed value to return is 1.0.
*
* Implement only the wake-up version of this sensor.
*/
#define SENSOR_TYPE_WRIST_TILT_GESTURE (26)
#define SENSOR_STRING_TYPE_WRIST_TILT_GESTURE "android.sensor.wrist_tilt_gesture"
/*
* SENSOR_TYPE_DEVICE_ORIENTATION
* reporting-mode: on-change
*
* The current orientation of the device. The value should be reported in the
* first element of the 'data' member variable in sensors_event_t. The only
* values that can be reported are (please refer to Android Sensor Coordinate
* System to understand the X and Y axis direction with respect to default
* orientation):
* - 0: device is in default orientation (Y axis is vertical and points up)
* - 1: device is rotated 90 degrees counter-clockwise from default
* orientation (X axis is vertical and points up)
* - 2: device is rotated 180 degrees from default orientation (Y axis is
* vertical and points down)
* - 3: device is rotated 90 degrees clockwise from default orientation (X axis
* is vertical and points down)
*
* Moving the device to an orientation where the Z axis is vertical (either up
* or down) should not cause a new event to be reported.
*
* To improve the user experience of this sensor, it is recommended to implement
* some physical (i.e., rotation angle) and temporal (i.e., delay) hysteresis.
* In other words, minor or transient rotations should not cause a new event to
* be reported.
*
* This sensor should only be implemented with the help of an accelerometer.
* This is a low power sensor that should reduce the number of interrupts of the
* AP. Do not emulate this sensor in the HAL.
*
* Both wake-up and non wake-up versions are useful.
*/
#define SENSOR_TYPE_DEVICE_ORIENTATION (27)
#define SENSOR_STRING_TYPE_DEVICE_ORIENTATION "android.sensor.device_orientation"
/*
* SENSOR_TYPE_POSE_6DOF
* trigger-mode: continuous
*
* A sensor of this type returns the pose of the device.
* Pose of the device is defined as the orientation of the device from a
* Earth Centered Earth Fixed frame and the translation from an arbitrary
* point at subscription.
*
* This sensor can be high power. It can use any and all of the following
* . Accelerometer
* . Gyroscope
* . Camera
* . Depth Camera
*
*/
#define SENSOR_TYPE_POSE_6DOF (28)
#define SENSOR_STRING_TYPE_POSE_6DOF "android.sensor.pose_6dof"
/*
* SENSOR_TYPE_STATIONARY_DETECT
* trigger mode: one shot
*
* A sensor of this type returns an event if the device is still/stationary for
* a while. The period of time to monitor for statinarity should be greater than
* 5 seconds, and less than 10 seconds.
*
* Stationarity here refers to absolute stationarity. eg: device on desk.
*
* The only allowed value to return is 1.0.
*/
#define SENSOR_TYPE_STATIONARY_DETECT (29)
#define SENSOR_STRING_TYPE_STATIONARY_DETECT "android.sensor.stationary_detect"
/*
* SENSOR_TYPE_MOTION_DETECT
* trigger mode: one shot
*
* A sensor of this type returns an event if the device is not still for
* a while. The period of time to monitor for statinarity should be greater than
* 5 seconds, and less than 10 seconds.
*
* Motion here refers to any mechanism in which the device is causes to be
* moved in its inertial frame. eg: Pickin up the device and walking with it
* to a nearby room may trigger motion wherewas keeping the device on a table
* on a smooth train moving at constant velocity may not trigger motion.
*
* The only allowed value to return is 1.0.
*/
#define SENSOR_TYPE_MOTION_DETECT (30)
#define SENSOR_STRING_TYPE_MOTION_DETECT "android.sensor.motion_detect"
/*
* SENSOR_TYPE_HEART_BEAT
* trigger mode: continuous
*
* A sensor of this type returns an event everytime a hear beat peak is
* detected.
*
* Peak here ideally corresponds to the positive peak in the QRS complex of
* and ECG signal.
*
* The sensor is not expected to be optimized for latency. As a guide, a
* latency of up to 10 seconds is acceptable. However the timestamp attached
* to the event should be accurate and should correspond to the time the peak
* occured.
*
* The sensor event contains a parameter for the confidence in the detection
* of the peak where 0.0 represent no information at all, and 1.0 represents
* certainty.
*/
#define SENSOR_TYPE_HEART_BEAT (31)
#define SENSOR_STRING_TYPE_HEART_BEAT "android.sensor.heart_beat"
/**
* SENSOR_TYPE_DYNAMIC_SENSOR_META
* trigger-mode: special
*
* A sensor event of this type is received when a dynamic sensor is added to or removed from the
* system. At most one sensor of this type can be present in one sensor HAL implementation and
* presence of a sensor of this type in sensor HAL implementation indicates that this sensor HAL
* supports dynamic sensor feature. Operations, such as batch, activate and setDelay, to this
* special purpose sensor should be treated as no-op and return successful.
*
* A dynamic sensor connection indicates connection of a physical device or instantiation of a
* virtual sensor backed by algorithm; and a dynamic sensor disconnection indicates the the
* opposite. A sensor event of SENSOR_TYPE_DYNAMIC_SENSOR_META type should be delivered regardless
* of the activation status of the sensor in the event of dynamic sensor connection and
* disconnection. In the sensor event, besides the common data entries, "dynamic_sensor_meta", which
* includes fields for connection status, handle of the sensor involved, pointer to sensor_t
* structure and a uuid field, should be populated.
*
* At a dynamic sensor connection event, fields of sensor_t structure referenced by a pointer in
* dynamic_sensor_meta should be filled as if it was regular sensors. Sensor HAL is responsible for
* recovery of memory if the corresponding data is dynamicially allocated. However, the the pointer
* must be valid until the first activate call to the sensor reported in this connection event. At a
* dynamic sensor disconnection, the sensor_t pointer should be NULL.
*
* The sensor handle assigned to dynamic sensors should never be the same as that of any regular
* static sensors, and should be unique until next boot. In another word, if a handle h is used for
* a dynamic sensor A, that same number cannot be used for the same dynamic sensor A or another
* dynamic sensor B even after disconnection of A until reboot.
*
* The UUID field will be used for identifying the sensor in addition to name, vendor and version
* and type. For physical sensors of the same model, all sensors will have the same values in
* sensor_t, but the UUID should be unique and persistent for each individual unit. An all zero UUID
* indicates it is not possible to differentiate individual sensor unit.
*
*/
#define SENSOR_TYPE_DYNAMIC_SENSOR_META (32)
#define SENSOR_STRING_TYPE_DYNAMIC_SENSOR_META "android.sensor.dynamic_sensor_meta"
/**
* SENSOR_TYPE_ADDITIONAL_INFO
* reporting-mode: N/A
*
* This sensor type is for delivering additional sensor information aside from sensor event data.
* Additional information may include sensor front-end group delay, internal calibration parameters,
* noise level metrics, device internal temperature, etc.
*
* This type will never bind to a sensor. In other words, no sensor in the sensor list should be of
* the type SENSOR_TYPE_ADDITIONAL_INFO. If a sensor HAL supports sensor additional information
* feature, it reports sensor_event_t with "sensor" field set to handle of the reporting sensor and
* "type" field set to SENSOR_TYPE_ADDITIONAL_INFO. Delivery of additional information events is
* triggered under two conditions: an enable activate() call or a flush() call to the corresponding
* sensor.
*
* A single additional information report consists of multiple frames. Sequences of these frames are
* ordered using timestamps, which means the timestamps of sequential frames have to be at least 1
* nanosecond apart from each other. Each frame is a sensor_event_t delivered through the HAL
* interface, with related data stored in the "additional_info" field, which is of type
* additional_info_event_t. The "type" field of additional_info_event_t denotes the nature of the
* payload data (see additional_info_type_t). The "serial" field is used to keep the sequence of
* payload data that spans multiple frames. The first frame of the entire report is always of type
* AINFO_BEGIN, and the last frame is always AINFO_END.
*
* All additional information frames have to be delivered after flush complete event if flush() was
* triggering the report.
*/
#define SENSOR_TYPE_ADDITIONAL_INFO (33)
#define SENSOR_STRING_TYPE_ADDITIONAL_INFO "android.sensor.additional_info"
/**
* Values returned by the accelerometer in various locations in the universe.
* all values are in SI units (m/s^2)
*/
#define GRAVITY_SUN (275.0f)
#define GRAVITY_EARTH (9.80665f)
/** Maximum magnetic field on Earth's surface */
#define MAGNETIC_FIELD_EARTH_MAX (60.0f)
/** Minimum magnetic field on Earth's surface */
#define MAGNETIC_FIELD_EARTH_MIN (30.0f)
/**
* Possible values of the status field of sensor events.
*/
#define SENSOR_STATUS_NO_CONTACT -1
#define SENSOR_STATUS_UNRELIABLE 0
#define SENSOR_STATUS_ACCURACY_LOW 1
#define SENSOR_STATUS_ACCURACY_MEDIUM 2
#define SENSOR_STATUS_ACCURACY_HIGH 3
struct sensor_t;
/**
* sensor event data
*/
typedef struct {
union {
float v[3];
struct {
float x;
float y;
float z;
};
struct {
float azimuth;
float pitch;
float roll;
};
};
int8_t status;
uint8_t reserved[3];
} sensors_vec_t;
/**
* uncalibrated gyroscope and magnetometer event data
*/
typedef struct {
union {
float uncalib[3];
struct {
float x_uncalib;
float y_uncalib;
float z_uncalib;
};
};
union {
float bias[3];
struct {
float x_bias;
float y_bias;
float z_bias;
};
};
} uncalibrated_event_t;
/**
* Meta data event data
*/
typedef struct meta_data_event {
int32_t what;
int32_t sensor;
} meta_data_event_t;
/**
* Dynamic sensor meta event. See the description of SENSOR_TYPE_DYNAMIC_SENSOR_META type for
* details.
*/
typedef struct dynamic_sensor_meta_event {
int32_t connected;
int32_t handle;
const struct sensor_t * sensor; // should be NULL if connected == false
uint8_t uuid[16]; // UUID of a dynamic sensor (use platform endianess).
} dynamic_sensor_meta_event_t;
/**
* Heart rate event data
*/
typedef struct {
// Heart rate in beats per minute.
// Set to 0 when status is SENSOR_STATUS_UNRELIABLE or ..._NO_CONTACT
float bpm;
// Status of the sensor for this reading. Set to one SENSOR_STATUS_...
// Note that this value should only be set for sensors that explicitly define
// the meaning of this field. This field is not piped through the framework
// for other sensors.
int8_t status;
} heart_rate_event_t;
typedef struct {
int32_t type; // type of payload data, see additional_info_type_t
int32_t serial; // sequence number of this frame for this type
union {
// for each frame, a single data type, either int32_t or float, should be used.
int32_t data_int32[14];
float data_float[14];
};
} additional_info_event_t;
typedef enum additional_info_type {
//
AINFO_BEGIN = 0x0, // Marks the beginning of additional information frames
AINFO_END = 0x1, // Marks the end of additional information frames
// Basic information
AINFO_UNTRACKED_DELAY = 0x10000, // Estimation of the delay that is not tracked by sensor
// timestamps. This includes delay introduced by
// sensor front-end filtering, data transport, etc.
// float[2]: delay in seconds
// standard deviation of estimated value
//
AINFO_INTERNAL_TEMPERATURE, // float: Celsius temperature.
//
AINFO_VEC3_CALIBRATION, // First three rows of a homogeneous matrix, which
// represents calibration to a three-element vector
// raw sensor reading.
// float[12]: 3x4 matrix in row major order
//
AINFO_SENSOR_PLACEMENT, // Location and orientation of sensor element in the
// device frame: origin is the geometric center of the
// mobile device screen surface; the axis definition
// corresponds to Android sensor definitions.
// float[12]: 3x4 matrix in row major order
//
AINFO_SAMPLING, // float[2]: raw sample period in seconds,
// standard deviation of sampling period
// Sampling channel modeling information
AINFO_CHANNEL_NOISE = 0x20000, // int32_t: noise type
// float[n]: parameters
//
AINFO_CHANNEL_SAMPLER, // float[3]: sample period
// standard deviation of sample period,
// quantization unit
//
AINFO_CHANNEL_FILTER, // Represents a filter:
// \sum_j a_j y[n-j] == \sum_i b_i x[n-i]
//
// int32_t[3]: number of feedforward coefficients, M,
// number of feedback coefficients, N, for
// FIR filter, N=1.
// bit mask that represents which element to
// which the filter is applied, bit 0 == 1
// means this filter applies to vector
// element 0.
// float[M+N]: filter coefficients (b0, b1, ..., BM-1),
// then (a0, a1, ..., aN-1), a0 is always 1.
// Multiple frames may be needed for higher
// number of taps.
//
AINFO_CHANNEL_LINEAR_TRANSFORM, // int32_t[2]: size in (row, column) ... 1st frame
// float[n]: matrix element values in row major order.
//
AINFO_CHANNEL_NONLINEAR_MAP, // int32_t[2]: extrapolate method
// interpolate method
// float[n]: mapping key points in pairs, (in, out)...
// (may be used to model saturation)
//
AINFO_CHANNEL_RESAMPLER, // int32_t: resample method (0-th order, 1st order...)
// float[1]: resample ratio (upsampling if < 1.0;
// downsampling if > 1.0).
//
// Custom information
AINFO_CUSTOM_START = 0x10000000, //
// Debugging
AINFO_DEBUGGING_START = 0x40000000, //
} additional_info_type_t;
/**
* Union of the various types of sensor data
* that can be returned.
*/
typedef struct sensors_event_t {
/* must be sizeof(struct sensors_event_t) */
int32_t version;
/* sensor identifier */
int32_t sensor;
/* sensor type */
int32_t type;
/* reserved */
int32_t reserved0;
/* time is in nanosecond */
int64_t timestamp;
union {
union {
float data[16];
/* acceleration values are in meter per second per second (m/s^2) */
sensors_vec_t acceleration;
/* magnetic vector values are in micro-Tesla (uT) */
sensors_vec_t magnetic;
/* orientation values are in degrees */
sensors_vec_t orientation;
/* gyroscope values are in rad/s */
sensors_vec_t gyro;
/* temperature is in degrees centigrade (Celsius) */
float temperature;
/* distance in centimeters */
float distance;
/* light in SI lux units */
float light;
/* pressure in hectopascal (hPa) */
float pressure;
/* relative humidity in percent */
float relative_humidity;
/* uncalibrated gyroscope values are in rad/s */
uncalibrated_event_t uncalibrated_gyro;
/* uncalibrated magnetometer values are in micro-Teslas */
uncalibrated_event_t uncalibrated_magnetic;
/* heart rate data containing value in bpm and status */
heart_rate_event_t heart_rate;
/* this is a special event. see SENSOR_TYPE_META_DATA above.
* sensors_meta_data_event_t events are all reported with a type of
* SENSOR_TYPE_META_DATA. The handle is ignored and must be zero.
*/
meta_data_event_t meta_data;
/* dynamic sensor meta event. See SENSOR_TYPE_DYNAMIC_SENSOR_META type for details */
dynamic_sensor_meta_event_t dynamic_sensor_meta;
/*
* special additional sensor information frame, see
* SENSOR_TYPE_ADDITIONAL_INFO for details.
*/
additional_info_event_t additional_info;
};
union {
uint64_t data[8];
/* step-counter */
uint64_t step_counter;
} u64;
};
/* Reserved flags for internal use. Set to zero. */
uint32_t flags;
uint32_t reserved1[3];
} sensors_event_t;
/* see SENSOR_TYPE_META_DATA */
typedef sensors_event_t sensors_meta_data_event_t;
/**
* Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
* and the fields of this data structure must begin with hw_module_t
* followed by module specific information.
*/
struct sensors_module_t {
struct hw_module_t common;
/**
* Enumerate all available sensors. The list is returned in "list".
* @return number of sensors in the list
*/
int (*get_sensors_list)(struct sensors_module_t* module,
struct sensor_t const** list);
/**
* Place the module in a specific mode. The following modes are defined
*
* 0 - Normal operation. Default state of the module.
* 1 - Loopback mode. Data is injected for the supported
* sensors by the sensor service in this mode.
* @return 0 on success
* -EINVAL if requested mode is not supported
* -EPERM if operation is not allowed
*/
int (*set_operation_mode)(unsigned int mode);
};
struct sensor_t {
/* Name of this sensor.
* All sensors of the same "type" must have a different "name".
*/
const char* name;
/* vendor of the hardware part */
const char* vendor;
/* version of the hardware part + driver. The value of this field
* must increase when the driver is updated in a way that changes the
* output of this sensor. This is important for fused sensors when the
* fusion algorithm is updated.
*/
int version;
/* handle that identifies this sensors. This handle is used to reference
* this sensor throughout the HAL API.
*/
int handle;
/* this sensor's type. */
int type;
/* maximum range of this sensor's value in SI units */
float maxRange;
/* smallest difference between two values reported by this sensor */
float resolution;
/* rough estimate of this sensor's power consumption in mA */
float power;
/* this value depends on the reporting mode:
*
* continuous: minimum sample period allowed in microseconds
* on-change : 0
* one-shot :-1
* special : 0, unless otherwise noted
*/
int32_t minDelay;
/* number of events reserved for this sensor in the batch mode FIFO.
* If there is a dedicated FIFO for this sensor, then this is the
* size of this FIFO. If the FIFO is shared with other sensors,
* this is the size reserved for that sensor and it can be zero.
*/
uint32_t fifoReservedEventCount;
/* maximum number of events of this sensor that could be batched.
* This is especially relevant when the FIFO is shared between
* several sensors; this value is then set to the size of that FIFO.
*/
uint32_t fifoMaxEventCount;
/* type of this sensor as a string. Set to corresponding
* SENSOR_STRING_TYPE_*.
* When defining an OEM specific sensor or sensor manufacturer specific
* sensor, use your reserve domain name as a prefix.
* ex: com.google.glass.onheaddetector
* For sensors of known type, the android framework might overwrite this
* string automatically.
*/
const char* stringType;
/* permission required to see this sensor, register to it and receive data.
* Set to "" if no permission is required. Some sensor types like the
* heart rate monitor have a mandatory require_permission.
* For sensors that always require a specific permission, like the heart
* rate monitor, the android framework might overwrite this string
* automatically.
*/
const char* requiredPermission;
/* This value is defined only for continuous mode and on-change sensors. It is the delay between
* two sensor events corresponding to the lowest frequency that this sensor supports. When lower
* frequencies are requested through batch()/setDelay() the events will be generated at this
* frequency instead. It can be used by the framework or applications to estimate when the batch
* FIFO may be full.
*
* NOTE: 1) period_ns is in nanoseconds where as maxDelay/minDelay are in microseconds.
* continuous, on-change: maximum sampling period allowed in microseconds.
* one-shot, special : 0
* 2) maxDelay should always fit within a 32 bit signed integer. It is declared as 64 bit
* on 64 bit architectures only for binary compatibility reasons.
* Availability: SENSORS_DEVICE_API_VERSION_1_3
*/
#ifdef __LP64__
int64_t maxDelay;
#else
int32_t maxDelay;
#endif
/* Flags for sensor. See SENSOR_FLAG_* above. Only the least significant 32 bits are used here.
* It is declared as 64 bit on 64 bit architectures only for binary compatibility reasons.
* Availability: SENSORS_DEVICE_API_VERSION_1_3
*/
#ifdef __LP64__
uint64_t flags;
#else
uint32_t flags;
#endif
/* reserved fields, must be zero */
void* reserved[2];
};
/*
* sensors_poll_device_t is used with SENSORS_DEVICE_API_VERSION_0_1
* and is present for backward binary and source compatibility.
* See the Sensors HAL interface section for complete descriptions of the
* following functions:
* http://source.android.com/devices/sensors/index.html#hal
*/
struct sensors_poll_device_t {
struct hw_device_t common;
int (*activate)(struct sensors_poll_device_t *dev,
int sensor_handle, int enabled);
int (*setDelay)(struct sensors_poll_device_t *dev,
int sensor_handle, int64_t sampling_period_ns);
int (*poll)(struct sensors_poll_device_t *dev,
sensors_event_t* data, int count);
};
/*
* struct sensors_poll_device_1 is used in HAL versions >= SENSORS_DEVICE_API_VERSION_1_0
*/
typedef struct sensors_poll_device_1 {
union {
/* sensors_poll_device_1 is compatible with sensors_poll_device_t,
* and can be down-cast to it
*/
struct sensors_poll_device_t v0;
struct {
struct hw_device_t common;
/* Activate/de-activate one sensor. Return 0 on success, negative
*
* sensor_handle is the handle of the sensor to change.
* enabled set to 1 to enable, or 0 to disable the sensor.
*
* Return 0 on success, negative errno code otherwise.
*/
int (*activate)(struct sensors_poll_device_t *dev,
int sensor_handle, int enabled);
/**
* Set the events's period in nanoseconds for a given sensor.
* If sampling_period_ns > max_delay it will be truncated to
* max_delay and if sampling_period_ns < min_delay it will be
* replaced by min_delay.
*/
int (*setDelay)(struct sensors_poll_device_t *dev,
int sensor_handle, int64_t sampling_period_ns);
/**
* Returns an array of sensor data.
*/
int (*poll)(struct sensors_poll_device_t *dev,
sensors_event_t* data, int count);
};
};
/*
* Sets a sensor’s parameters, including sampling frequency and maximum
* report latency. This function can be called while the sensor is
* activated, in which case it must not cause any sensor measurements to
* be lost: transitioning from one sampling rate to the other cannot cause
* lost events, nor can transitioning from a high maximum report latency to
* a low maximum report latency.
* See the Batching sensor results page for details:
* http://source.android.com/devices/sensors/batching.html
*/
int (*batch)(struct sensors_poll_device_1* dev,
int sensor_handle, int flags, int64_t sampling_period_ns,
int64_t max_report_latency_ns);
/*
* Flush adds a META_DATA_FLUSH_COMPLETE event (sensors_event_meta_data_t)
* to the end of the "batch mode" FIFO for the specified sensor and flushes
* the FIFO.
* If the FIFO is empty or if the sensor doesn't support batching (FIFO size zero),
* it should return SUCCESS along with a trivial META_DATA_FLUSH_COMPLETE event added to the
* event stream. This applies to all sensors other than one-shot sensors.
* If the sensor is a one-shot sensor, flush must return -EINVAL and not generate
* any flush complete metadata.
* If the sensor is not active at the time flush() is called, flush() should return
* -EINVAL.
*/
int (*flush)(struct sensors_poll_device_1* dev, int sensor_handle);
/*
* Inject a single sensor sample to be to this device.
* data points to the sensor event to be injected
* @return 0 on success
* -EPERM if operation is not allowed
* -EINVAL if sensor event cannot be injected
*/
int (*inject_sensor_data)(struct sensors_poll_device_1 *dev, const sensors_event_t *data);
void (*reserved_procs[7])(void);
} sensors_poll_device_1_t;
/** convenience API for opening and closing a device */
static inline int sensors_open(const struct hw_module_t* module,
struct sensors_poll_device_t** device) {
return module->methods->open(module,
SENSORS_HARDWARE_POLL, (struct hw_device_t**)device);
}
static inline int sensors_close(struct sensors_poll_device_t* device) {
return device->common.close(&device->common);
}
static inline int sensors_open_1(const struct hw_module_t* module,
sensors_poll_device_1_t** device) {
return module->methods->open(module,
SENSORS_HARDWARE_POLL, (struct hw_device_t**)device);
}
static inline int sensors_close_1(sensors_poll_device_1_t* device) {
return device->common.close(&device->common);
}
__END_DECLS
#endif // ANDROID_SENSORS_INTERFACE_H
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