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| author | Nicolas Boichat <drinkcat@chromium.org> | 2016-05-23 15:23:38 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-06-02 14:06:52 -0700 |
| commit | 4f600b32bbcdd1f870f8389b8666101d3a8513ed (patch) | |
| tree | d60ca034718fd19e0a13411825b1eaef25901072 /board/hoho | |
| parent | f6a53e9917b474e95afb42e2522fb88c61998c9a (diff) | |
| download | chrome-ec-4f600b32bbcdd1f870f8389b8666101d3a8513ed.tar.gz | |
stm32: i2c: Busy loop for a while waiting for interrupt
I2C is not necessarily _that_ slow, especially when using 1Mhz clock
speed, and, looking at traces from userspace, there are large gaps
(150us) between bytes (while the bytes themselves only take ~10us).
At 400kHz and higher bus speed, busy-loop for the duration of 2 bytes,
before sleeping (and yielding to other tasks) for 100us between each
attempt.
BRANCH=None
BUG=chrome-os-partner:50381
TEST=i2cget, look at Logic 16 traces: no gaps between address and bytes
Change-Id: If47f0f8e55be37002361800d35f71c945863d42d
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/346670
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'board/hoho')
0 files changed, 0 insertions, 0 deletions