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author | Gwendal Grignou <gwendal@chromium.org> | 2018-12-17 15:14:00 -0800 |
---|---|---|
committer | chrome-bot <chrome-bot@chromium.org> | 2019-03-26 17:27:00 -0700 |
commit | 40f9e2fc0f2354e033553131fd63cfb9f755a2e2 (patch) | |
tree | 1498d7190aece44697f3bee0e797565391f99750 /include/accelgyro.h | |
parent | 4a48404aeea58bfe0c31d5fea554b5329a223131 (diff) | |
download | chrome-ec-40f9e2fc0f2354e033553131fd63cfb9f755a2e2.tar.gz |
motion_lid: Rewrite lid angle calculation based on chromium code
Use code from ash/wm/tablet_mode/tablet_mode_controller.cc, in
particular TabletModeController::HandleHingeRotation()
to calculate lid angle.
Add unit tests based on
ash/wm/tablet_mode/tablet_mode_controller_unittest.cc and the data file
accelerometer_test_data_literals.cc.
BUG=b:120346412
BRANCH=none
TEST=Check unit tests pass, check it compile on FPU based EC, EC without
FPU and no 64 bit support (ampton).
Check lid calculation is correct on eve:
- with "while true ; do ectool motionsense lid_angle ; sleep 1 ; done"
Check when hinge is almost vertical lid angle is close to constant or
marked are unrieliable.
Check when shaking device, lid angle is also unreliable
Check with evtest SW_TABLET_MODE event is trigger when lid angle is
available and cross 180 region.
Change-Id: I545f7333ed9b53accedb75f238f747f66bae1f5d
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1388844
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'include/accelgyro.h')
-rw-r--r-- | include/accelgyro.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/accelgyro.h b/include/accelgyro.h index cc731cf794..2d415621d1 100644 --- a/include/accelgyro.h +++ b/include/accelgyro.h @@ -10,6 +10,14 @@ /* Header file for accelerometer / gyro drivers. */ +/* + * EC reports sensor data on 16 bits. For accel/gyro/mag.. the MSB is the sign. + * For instance, for gravity, + * real_value[in g] = measured_value * range >> 15 + */ +#define MOTION_SCALING_FACTOR (1 << 15) +#define MOTION_ONE_G (9.80665f) + struct accelgyro_drv { /** * Initialize accelerometers. |