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| author | Gwendal Grignou <gwendal@chromium.org> | 2015-08-06 15:42:44 -0700 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-08-24 19:08:04 +0000 |
| commit | 179d5d3c833433b07530b136a55085a6d22cbeee (patch) | |
| tree | a1a355b02a65bbfe7f7793e30d833c795bb26e50 /driver/accelgyro_bmi160.c | |
| parent | 0b79533f8874c8824fde3e020d01e328c685037c (diff) | |
| download | chrome-ec-179d5d3c833433b07530b136a55085a6d22cbeee.tar.gz | |
bmm150: add measurement repetition
To reduce noise the magnetometer measures in burst and
average the data.
Use "regular" presets: max frequency is limited to 100Hz.
Using a more precise presets limit frequency to no more than 50Hz.
BRANCH=smaug
TEST=Check magnetomter still works.
BUG=chrome-os-partner:39900
Change-Id: Ida6af86f6c207cc91e11378c129032f6d9e6b9ea
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/291990
Reviewed-by: Sheng-liang Song <ssl@chromium.org>
Diffstat (limited to 'driver/accelgyro_bmi160.c')
| -rw-r--r-- | driver/accelgyro_bmi160.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/driver/accelgyro_bmi160.c b/driver/accelgyro_bmi160.c index a6c29bfbb2..3afa3e6bd7 100644 --- a/driver/accelgyro_bmi160.c +++ b/driver/accelgyro_bmi160.c @@ -400,9 +400,10 @@ static int set_data_rate(const struct motion_sensor_t *s, } break; case MOTIONSENSE_TYPE_MAG: - if (reg_val > BMI160_ODR_800HZ) { - reg_val = BMI160_ODR_800HZ; - normalized_rate = 800000; + /* We use the regular preset we can go about 100Hz */ + if (reg_val > BMI160_ODR_100HZ) { + reg_val = BMI160_ODR_100HZ; + normalized_rate = 100000; } else if (reg_val < BMI160_ODR_0_78HZ) { reg_val = BMI160_ODR_0_78HZ; normalized_rate = 780; |