diff options
Diffstat (limited to 'quantum/backlight/backlight_timer.c')
| -rw-r--r-- | quantum/backlight/backlight_timer.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/quantum/backlight/backlight_timer.c b/quantum/backlight/backlight_timer.c index c32c35c154..82fb6a6a83 100644 --- a/quantum/backlight/backlight_timer.c +++ b/quantum/backlight/backlight_timer.c @@ -14,14 +14,14 @@ static uint16_t backlight_timer_get_duty(void); // See http://jared.geek.nz/2013/feb/linear-led-pwm static uint16_t cie_lightness(uint16_t v) { - if (v <= 5243) // if below 8% of max - return v / 9; // same as dividing by 900% + if (v <= 5243) // if below 8% of max + return v / 9; // same as dividing by 900% else { - uint32_t y = (((uint32_t)v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare + uint32_t y = (((uint32_t)v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare // to get a useful result with integer division, we shift left in the expression above // and revert what we've done again after squaring. y = y * y * y >> 8; - if (y > 0xFFFFUL) // prevent overflow + if (y > 0xFFFFUL) // prevent overflow return 0xFFFFU; else return (uint16_t)y; @@ -61,7 +61,9 @@ static void backlight_timer_top(void) { } } -static void backlight_timer_cmp(void) { backlight_pins_off(); } +static void backlight_timer_cmp(void) { + backlight_pins_off(); +} void backlight_task(void) {} @@ -77,7 +79,9 @@ static uint16_t breathing_counter = 0; static const uint8_t breathing_table[BREATHING_STEPS] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; // Use this before the cie_lightness function. -static inline uint16_t scale_backlight(uint16_t v) { return v / BACKLIGHT_LEVELS * get_backlight_level(); } +static inline uint16_t scale_backlight(uint16_t v) { + return v / BACKLIGHT_LEVELS * get_backlight_level(); +} void breathing_task(void) { uint8_t breathing_period = get_breathing_period(); @@ -91,13 +95,17 @@ void breathing_task(void) { backlight_timer_set_duty(cie_lightness(scale_backlight((uint16_t)breathing_table[index] * 256))); } -bool is_breathing(void) { return breathing; } +bool is_breathing(void) { + return breathing; +} void breathing_enable(void) { breathing_counter = 0; breathing = true; } -void breathing_disable(void) { breathing = false; } +void breathing_disable(void) { + breathing = false; +} void breathing_pulse(void) { backlight_set(is_backlight_enabled() ? 0 : BACKLIGHT_LEVELS); @@ -140,8 +148,12 @@ static void timerCallback(void) { } } -static void backlight_timer_set_duty(uint16_t duty) { s_duty = duty; } -static uint16_t backlight_timer_get_duty(void) { return s_duty; } +static void backlight_timer_set_duty(uint16_t duty) { + s_duty = duty; +} +static uint16_t backlight_timer_get_duty(void) { + return s_duty; +} // ChibiOS - Map GPT timer onto Software PWM static void gptTimerCallback(GPTDriver *gptp) { |