strago: fix sensors matrices

Matches definitons set in
chromium/chromeos/accelerometer/accelerometer_types.h.

Using that standard, the coordinate frames of the lid and base DO NOT
line up perfectly when the lid is fully closed or fully open.

Therefore, rotate the lid vector 180 along the X axis before
calculating the lid angle.

BRANCH=strago
BUG=none
TEST=When the device is open 180 degrees, check the sensors
agree with each other:
Flat on the back (Z pointing to the sky):
localhost devices # cat */*raw
-1008 [keyboard : X]
-112  [keyboard : Y]
16544 [kyeboard : Z]
-256  [lid : X ]
2000  [lid : Y ]
16336 [lid : Z ]
On the right side (X pointing to the ground)
localhost devices # cat */*raw
-16928
-48
-1040
-16176
432
80
On the bottom edge (Y pointing to the sky)
localhost devices # cat */*raw
-192
15872
1648
496
15936
752
Check the angle as calculated by the EC is correct using accelinfo.

Change-Id: I620b0078863137bc244aeacb6d8a81a9c869211a
Signed-off-by: Kevin Cheng <kevin.cheng@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/299577
Reviewed-by: Shawn N <shawnn@chromium.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/board/strago/board.c b/board/strago/board.c
index 42ec939e28..b354b1a75f 100644
--- a/board/strago/board.c
+++ b/board/strago/board.c
@@ -127,9 +127,9 @@ const matrix_3x3_t base_standard_ref = {
 };
 
 const matrix_3x3_t lid_standard_ref = {
-	{FLOAT_TO_FP(-1),  0,  0},
-	{ 0, FLOAT_TO_FP(-1),  0},
-	{ 0,  0, FLOAT_TO_FP(-1)}
+	{FLOAT_TO_FP(1),  0,  0},
+	{ 0, FLOAT_TO_FP(1),  0},
+	{ 0,  0, FLOAT_TO_FP(1)}
 };
 
 struct motion_sensor_t motion_sensors[] = {