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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Header for motion_lid.h */
#ifndef __CROS_EC_MOTION_LID_H
#define __CROS_EC_MOTION_LID_H
#include "host_command.h"
#include "math_util.h"
/**
* This structure defines all of the data needed to specify the orientation
* of the base and lid accelerometers in order to calculate the lid angle.
*/
struct accel_orientation {
/* Rotation matrix to rotate positive 90 degrees around the hinge. */
mat33_fp_t rot_hinge_90;
/*
* Rotation matrix to rotate 180 degrees around the hinge. The value
* here should be rot_hinge_90 ^ 2.
*/
mat33_fp_t rot_hinge_180;
/* Vector pointing along hinge axis. */
intv3_t hinge_axis;
};
/* Link global structure for orientation. This must be defined in board.c. */
extern const struct accel_orientation acc_orient;
/**
* Get last calculated lid angle. Note, the lid angle calculated by the EC
* is un-calibrated and is an approximate angle.
*
* @return lid angle in degrees in range [0, 360], or LID_ANGLE_UNRELIABLE
* if the lid angle can't be determined.
*/
int motion_lid_get_angle(void);
int host_cmd_motion_lid(struct host_cmd_handler_args *args);
void motion_lid_calc(void);
#endif /* __CROS_EC_MOTION_LID_H */
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