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Gwendal Grignou 81d269dc00 common: lightbar: Add histeresis to prevent flickering 
When ALS is enabled, if light is around one threshold (say 40 lux),
the lightbar will flicker between readings.
Add a histeresis to prevent the flickering.
The current setting is:

setting    ^
(dim)    2 | ------+---->---+
         1 |       +----<---+--->---+
(bright) 0 |                +---<---+---------
           +-------+--------+-------+--------> lux
               20       40      60

BRANCH=smaug
BUG=chrome-os-partner:44400
TEST=check in a dark room (30~40 lux) there is no flickering.
Add unit test.

Change-Id: I4018e2c2ed764abf9c9ed28e2d50a3e94a7d5f75
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/308205
2015-10-23 18:03:12 -07:00
board
common: lightbar: Add histeresis to prevent flickering
2015-10-23 18:03:12 -07:00
chip
oak: stm32f0: implement i2c_set_timeout
2015-10-23 05:12:09 -07:00
common
common: lightbar: Add histeresis to prevent flickering
2015-10-23 18:03:12 -07:00
core
system: Add support to reclaim space from loader.
2015-10-13 21:58:01 -07:00
docs
CCD: Add documentation
2015-05-07 00:00:47 +00:00
driver
tcpc: re-initialize tcpc if it reboots while tcpm is running
2015-10-22 17:40:31 -07:00
extra
Cr50: Fix spshc console command
2015-08-15 01:32:39 +00:00
include
common: lightbar: Add histeresis to prevent flickering
2015-10-23 18:03:12 -07:00
power
skylake: Move USB enable gpio control to board hooks
2015-10-12 13:15:47 -07:00
test
common: lightbar: Add histeresis to prevent flickering
2015-10-23 18:03:12 -07:00
util
Lars: Init board
2015-10-22 19:16:16 -07:00
.gitignore
Update .gitignore for new private repo
2015-07-10 23:12:36 +00:00
COMMIT-QUEUE.ini
Ignore failures in HWTest and VMTest in the commit queue.
2013-11-01 14:08:36 +00:00
LICENSE
Add LICENSE file to project
2012-05-11 09:11:52 -07:00
Makefile
Let private repos define their own subdirectories
2015-09-19 13:52:40 -07:00
Makefile.rules
Cause "make buildall -j" to yell about failures.
2015-10-01 20:45:55 -07:00
Makefile.toolchain
Define SECTION=* and SECTION_IS_* when compiling
2015-09-21 11:23:27 -07:00
OWNERS
Add OWNERS files
2014-04-02 19:58:53 +00:00
PRESUBMIT.cfg
presubmit: Add hook to check for config options.
2015-06-30 17:18:45 +00:00
README
Add standalone lightbar simulation tool
2014-05-15 05:20:14 +00:00
README.fmap
Update EC config and FMAP to reserve room for vboot signatures
2012-05-04 14:42:58 -07:00

README 

For an overview of the Embedded Controller firmware, refer to

http://www.chromium.org/chromium-os/2014-firmware-summit
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