diff options
| author | Gwendal Grignou <gwendal@chromium.org> | 2018-07-13 15:36:31 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-07-14 01:03:45 -0700 |
| commit | 59abb386c85753f568f246024902c79376958080 (patch) | |
| tree | 90bce70c32082af08d6c2492239a55fe6b79be6a | |
| parent | 2367e59a16e7426c3304aa6bc61adfc8fb590324 (diff) | |
| download | chrome-ec-59abb386c85753f568f246024902c79376958080.tar.gz | |
nocturne: Set BMI160 speed to 400kHZ
When running at just 100kHz, the EC has difficulty to read samples in
time. It can take up to read the FIFO 5 times back to back to read the
samples:
[484.946134 14 bytes in FIFO ]
[484.949848 BMI160 ACC : int scan 2 times]
[484.957095 14 bytes in FIFO ]
[484.961614 14 bytes in FIFO ]
[484.966271 14 bytes in FIFO ]
[484.970900 14 bytes in FIFO ]
[484.974541 BMI160 ACC : int scan 5 times]
When 400kHz is enable it happens rarely. [Only when higher priority
threads are running in thight loop]:
[3341.194286 BMI160 GYRO ODR: 200000 - roundup 1 from config 0 [AP
200000]]
[3341.201762 HC 0x67 err 9]
[3341.202395 HC 0x67 err 9]
[3341.203439 HC 0x67 err 9]
[3341.204378 HC 0x67 err 9]
[[3341.205056 HC 0x67 err 9]
[3341.205654 HC 0x67 err 9]
3341.204881 14 bytes in FIFO ]
[3341.206493 HC 0x67 err 9]
[3341.209807 14 bytes in FIFO ]
[3341.212296 BMI160 ACC : int scan 3 times]
[3346.238588 BMI160 ACC ODR: 10000 - roundup 1 from config 1 [AP 0]]
BUG=b:78539498,b:110143516
BRANCH=none
TEST=Run CtsHardwareTestCases on Nocturne less tests fails.
Change-Id: I07d067d04f6db3cfaf23c47baf6cd6942e46c159
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1137238
Commit-Ready: Alexandru M Stan <amstan@chromium.org>
Tested-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-by: Alexandru M Stan <amstan@chromium.org>
| -rw-r--r-- | board/nocturne/board.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/board/nocturne/board.c b/board/nocturne/board.c index d140e58c6c..f3aafed99c 100644 --- a/board/nocturne/board.c +++ b/board/nocturne/board.c @@ -126,9 +126,8 @@ const struct i2c_port_t i2c_ports[] = { GPIO_EC_I2C0_POWER_SDA }, - /* TODO(aaboagye): Restore 1MHz bus speed for after eval. */ { - "als_gyro", I2C_PORT_ALS_GYRO, 100, GPIO_EC_I2C5_ALS_GYRO_SCL, + "als_gyro", I2C_PORT_ALS_GYRO, 400, GPIO_EC_I2C5_ALS_GYRO_SCL, GPIO_EC_I2C5_ALS_GYRO_SDA }, |