移除混合光最低亮度限制

project/example/ble/ble_peripheral/app/src/bridge_pwm.c

@@ -25,7 +25,7 @@
 #define BRIDGE_FRAME_US           500U
 #define BRIDGE_DEADTIME_US        25U
 #define BRIDGE_DUAL_ACTIVE_US     450U
-#define BRIDGE_MIN_DUAL_PULSE_US  50U
+#define BRIDGE_MIN_DUAL_PULSE_US  1U
 #define BRIDGE_TIMER_TICKS_PER_US 16U
 
 #define BRIDGE_GPIO_PORT          0U
@@ -327,12 +327,7 @@ __RAM_CODE void Bridge_Service_1ms(void)
          */
         total_on_us = (BRIDGE_DUAL_ACTIVE_US * total +
                        (BRIDGE_MIX_SCALE / 2U)) / BRIDGE_MIX_SCALE;
-        /*
+        /* Keep a non-zero timer interval without imposing a brightness floor. */
-         * Timer/driver edge uncertainty becomes visible when a dual-color
-         * pulse is only a few microseconds wide. Keep both directions at
-         * least 50 us. Single-color hardware PWM keeps its independent
-         * high-resolution brightness range.
-         */
         if (total_on_us < (2U * BRIDGE_MIN_DUAL_PULSE_US)) {
             total_on_us = 2U * BRIDGE_MIN_DUAL_PULSE_US;
         }

project/example/ble/ble_peripheral/app/src/light_transition.c

@@ -8,8 +8,6 @@ volatile uint8_t Light_Transition_FadeActive;
 #define OUTPUT_SMOOTH_SHIFT 4U
 #define LIGHT_OUTPUT_SCALE 1000U
 #define BREATH_MIN_OUTPUT (LIGHT_OUTPUT_SCALE / 100U)
-#define DUAL_MIN_COMBINED_OUTPUT ((LIGHT_OUTPUT_SCALE * 15U) / 100U)
-#define DUAL_MIN_STABLE_CHANNEL_OUTPUT 112U
 #define POWER_FADE_Q12_MAX 4096U
 #define POWER_FADE_ON_TICKS 140U
 #define POWER_FADE_OFF_TICKS 160U
@@ -196,10 +194,6 @@ void Light_Transition_Task(void)
     uint16_t target_brightness_scale;
     uint16_t brightness_scale;
     uint16_t fade_scale;
-    uint16_t mix_total;
-    uint16_t weak_mix;
-    uint16_t required_total;
-    uint16_t floor_w;
     uint8_t power_transitioning;
 
     /*
@@ -224,47 +218,6 @@ void Light_Transition_Task(void)
         (uint16_t)(((uint32_t)C_PWM * brightness_scale *
                     (LIGHT_OUTPUT_SCALE / 100U) + 2048U) >> 12);
 
-    /*
-     * Mixed light starts from a 15% combined floor. If the weaker direction
-     * would be below 112/1000 (about 50 us of the 450 us active window), raise
-     * the combined floor just enough to preserve the requested W:C ratio.
-     * Ratios that cannot satisfy this even at 100% are treated as single
-     * color. Single-color output keeps the 1% Gamma minimum.
-     */
-    if(W_PWM != 0U && C_PWM != 0U)
-    {
-        mix_total = (uint16_t)(W_PWM + C_PWM);
-        weak_mix = (W_PWM < C_PWM) ? W_PWM : C_PWM;
-        required_total = (uint16_t)(
-            ((uint32_t)DUAL_MIN_STABLE_CHANNEL_OUTPUT * mix_total +
-             weak_mix - 1U) / weak_mix);
-
-        if(required_total > LIGHT_OUTPUT_SCALE)
-        {
-            if(W_PWM < C_PWM)
-                target_w = 0U;
-            else
-                target_c = 0U;
-        }
-        else
-        {
-            if(required_total < DUAL_MIN_COMBINED_OUTPUT)
-                required_total = DUAL_MIN_COMBINED_OUTPUT;
-
-            if((uint16_t)(target_w + target_c) < required_total)
-            {
-                floor_w = (uint16_t)(
-                    ((uint32_t)required_total * W_PWM +
-                     (mix_total / 2U)) / mix_total);
-                if(floor_w == 0U) floor_w = 1U;
-                if(floor_w >= required_total)
-                    floor_w = required_total - 1U;
-                target_w = floor_w;
-                target_c = required_total - floor_w;
-            }
-        }
-    }
-
     target_w = (uint16_t)(((uint32_t)target_w * fade_scale + 2048U) >> 12);
     target_c = (uint16_t)(((uint32_t)target_c * fade_scale + 2048U) >> 12);