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Merge "sensor HAL: add device orientation sensor"

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Trevor Bunker 2016-01-15 16:25:26 +00:00 committed by Android (Google) Code Review
commit 9d8d359829
1 changed files with 34 additions and 0 deletions
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34
include/hardware/sensors.h
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@ -657,6 +657,40 @@ enum {
#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"
/**
* Values returned by the accelerometer in various locations in the universe.
* all values are in SI units (m/s^2)