diff options
| author | Nick Vaccaro <nvaccaro@google.com> | 2019-03-27 13:58:07 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-05-06 19:14:50 -0700 |
| commit | 106c145b07042ba39860f0ef9b1f379f896f5b5f (patch) | |
| tree | 26d2fe31c630368a2ee25cfb405141615da578b5 /include/accelgyro.h | |
| parent | b817b8dec0924050d746dc4257971ee522886b86 (diff) | |
| download | chrome-ec-106c145b07042ba39860f0ef9b1f379f896f5b5f.tar.gz | |
driver: add tcs3400 ALS sensor chip driver
Implements a MOTIONSENSE_TYPE_LIGHT sensor using
the clear channel of the tcs3400.
BUG=b:124512628
BRANCH=master
TEST=cherry-pick CLs to enable tcs3400 for flapjack and to add
alslog, build and flash to flapjack; boot flapjack, from ec console,
execute 'sysjump rw', then execute "alslog" to enable logging of als
data. Verify als data is generated and logged to ec console.
Change-Id: I918cbf5513fb5eba20a27705c47545d3c0b3ca91
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1541955
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Diffstat (limited to 'include/accelgyro.h')
| -rw-r--r-- | include/accelgyro.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/accelgyro.h b/include/accelgyro.h index 2d415621d1..0d00116ed6 100644 --- a/include/accelgyro.h +++ b/include/accelgyro.h @@ -152,6 +152,19 @@ struct accelgyro_saved_data_t { uint16_t scale[3]; }; +/* Calibration data */ +struct als_calibration_t { + /* + * Scale, uscale, and offset are used to correct the raw 16 bit ALS + * data and then to convert it to 32 bit using the following equations: + * raw_value += offset; + * adjusted_value = raw_value * scale + raw_value * uscale / 10000; + */ + uint16_t scale; + uint16_t uscale; + int16_t offset; +}; + #define SENSOR_APPLY_SCALE(_input, _scale) \ (((_input) * (_scale)) / MOTION_SENSE_DEFAULT_SCALE) |