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Diffstat (limited to 'include/motion_lid.h')
| -rw-r--r-- | include/motion_lid.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/include/motion_lid.h b/include/motion_lid.h new file mode 100644 index 0000000000..b3348c020e --- /dev/null +++ b/include/motion_lid.h @@ -0,0 +1,50 @@ +/* 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_sense.c */ + +#ifndef __CROS_EC_MOTION_LID_H +#define __CROS_EC_MOTION_LID_H + +/* Anything outside of lid angle range [-180, 180] should work. */ +#define LID_ANGLE_UNRELIABLE 500.0F + +/** + * 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. */ + matrix_3x3_t rot_hinge_90; + + /* + * Rotation matrix to rotate 180 degrees around the hinge. The value + * here should be rot_hinge_90 ^ 2. + */ + matrix_3x3_t rot_hinge_180; + + /* Vector pointing along hinge axis. */ + vector_3_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]. + */ +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 */ + + |