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提升Gamma调光输出精度

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This commit is contained in:
吴琪
2026-07-27 17:26:41 +08:00
parent d351ec3fc2
commit 20b8bdaad3
2 changed files with 26 additions and 14 deletions
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project/example/ble/ble_peripheral/app/src/bridge_pwm.c
+1 -1
View File
@@ -21,7 +21,7 @@
*/
#define BRIDGE_PWM_SCALE 1000U
#define BRIDGE_PWM_PERIOD 7U
#define BRIDGE_MIX_SCALE 100U
#define BRIDGE_MIX_SCALE 1000U
#define BRIDGE_FRAME_US 1000U
#define BRIDGE_DEADTIME_US 50U
#define BRIDGE_DUAL_ACTIVE_US 900U
project/example/ble/ble_peripheral/app/src/light_transition.c
+25 -13
View File
@@ -4,9 +4,10 @@
volatile uint8_t Light_Transition_FadeActive;
#define LIGHT_FADE_STEP 1U
#define BRIGHTNESS_SMOOTH_SHIFT 4U
#define BREATH_MIN_OUTPUT 1U
#define OUTPUT_SMOOTH_SHIFT 4U
#define LIGHT_OUTPUT_SCALE 1000U
#define BREATH_MIN_OUTPUT (LIGHT_OUTPUT_SCALE / 100U)
#define POWER_FADE_Q12_MAX 4096U
#define POWER_FADE_ON_TICKS 140U
#define POWER_FADE_OFF_TICKS 160U
@@ -57,6 +58,7 @@ static uint16_t current_brightness_q12;
static uint16_t power_fade_progress_q12;
static uint16_t power_fade_remainder;
static uint8_t power_fade_direction;
static uint8_t transition_sync_pending;
static uint16_t brightness_scale_for_level(uint8_t level)
{
@@ -88,17 +90,22 @@ static uint16_t approach_brightness_scale(uint16_t current, uint16_t target)
static uint16_t approach_target(uint16_t current, uint16_t target)
{
uint16_t delta;
uint16_t step;
if(current == target) return current;
if(current < target)
{
uint16_t delta = target - current;
return current + ((delta > LIGHT_FADE_STEP) ? LIGHT_FADE_STEP : delta);
delta = target - current;
step = (uint16_t)((delta + ((1U << OUTPUT_SMOOTH_SHIFT) - 1U)) >>
OUTPUT_SMOOTH_SHIFT);
return current + step;
}
if(current > target)
{
uint16_t delta = current - target;
return current - ((delta > LIGHT_FADE_STEP) ? LIGHT_FADE_STEP : delta);
}
return current;
delta = current - target;
step = (uint16_t)((delta + ((1U << OUTPUT_SMOOTH_SHIFT) - 1U)) >>
OUTPUT_SMOOTH_SHIFT);
return current - step;
}
static uint16_t power_fade_scale(uint16_t progress_q12)
@@ -176,6 +183,7 @@ void Light_Transition_SyncBrightness(uint8_t level)
level == 0U ? 0U : POWER_FADE_Q12_MAX;
power_fade_remainder = 0U;
power_fade_direction = 0U;
transition_sync_pending = 1U;
}
void Light_Transition_Task(void)
@@ -205,9 +213,11 @@ void Light_Transition_Task(void)
: (power_fade_progress_q12 != 0U);
target_w =
(uint16_t)(((uint32_t)W_PWM * brightness_scale + 2048U) >> 12);
(uint16_t)(((uint32_t)W_PWM * brightness_scale *
(LIGHT_OUTPUT_SCALE / 100U) + 2048U) >> 12);
target_c =
(uint16_t)(((uint32_t)C_PWM * brightness_scale + 2048U) >> 12);
(uint16_t)(((uint32_t)C_PWM * brightness_scale *
(LIGHT_OUTPUT_SCALE / 100U) + 2048U) >> 12);
if(Mode == mode1 && powered_on && !power_transitioning)
{
@@ -217,7 +227,8 @@ void Light_Transition_Task(void)
target_c = BREATH_MIN_OUTPUT;
}
if((Mode == mode2 && powered_on) || power_transitioning)
if((Mode == mode2 && powered_on) || power_transitioning ||
transition_sync_pending)
{
W_PWM_duty = target_w;
C_PWM_duty = target_c;
@@ -227,6 +238,7 @@ void Light_Transition_Task(void)
W_PWM_duty = approach_target(W_PWM_duty, target_w);
C_PWM_duty = approach_target(C_PWM_duty, target_c);
}
transition_sync_pending = 0U;
Light_Transition_FadeActive =
!powered_on && (power_fade_progress_q12 != 0U ||