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| author | Nicolas Boichat <drinkcat@google.com> | 2017-05-16 10:16:43 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-05-16 07:47:05 -0700 |
| commit | cb9bd66ec66ccd499ff597919806eafc1524acd2 (patch) | |
| tree | d891ff6be97a5b681e24097aadb17ce9231371e7 /board/hammer/board.c | |
| parent | dee69a236f67b99e87746fee5894c915682623ee (diff) | |
| download | chrome-ec-cb9bd66ec66ccd499ff597919806eafc1524acd2.tar.gz | |
hammer: Add staff board
hammer corresponds to poppy, and staff corresponds to soraka.
Current differences (hammer/staff):
- USB id (5022/502b)
- PWM frequency (10kHz/100Hz):
- On staff, driving PWM at 10kHz leads to an actual duty cycle
around 30-40%, with a PWM output at 1% (long rise/fall time).
100Hz looks better, we get ~1.45% duty with 1% PWM output.
BRANCH=none
BUG=b:38277869
TEST=Flash staff, boots fine.
TEST=pwm 0 1 shows quite dim backlight on staff.
Change-Id: I66ba2adf89fbee8578ee473afb28e3e242b4d111
Reviewed-on: https://chromium-review.googlesource.com/505855
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'board/hammer/board.c')
| -rw-r--r-- | board/hammer/board.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/board/hammer/board.c b/board/hammer/board.c index 4f157ad22c..56aefc89e4 100644 --- a/board/hammer/board.c +++ b/board/hammer/board.c @@ -54,9 +54,15 @@ const struct i2c_port_t i2c_ports[] = { }; const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports); +#ifdef BOARD_STAFF +#define KBLIGHT_PWM_FREQ 100 /* Hz */ +#else +#define KBLIGHT_PWM_FREQ 10000 /* Hz */ +#endif + /* PWM channels. Must be in the exactly same order as in enum pwm_channel. */ const struct pwm_t pwm_channels[] = { - {STM32_TIM(TIM_KBLIGHT), STM32_TIM_CH(1), 0, 10000 /* Hz */ }, + {STM32_TIM(TIM_KBLIGHT), STM32_TIM_CH(1), 0, KBLIGHT_PWM_FREQ}, }; BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT); |