diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
index 40ba1c0..763013e 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
@@ -101,7 +101,7 @@ uint8_t g_rs485_id = 0;
 #define  BREATH_HOLD_LOW      3
 
 /* 光耦有信号时加速参数 (周期 ~1s) */
-#define  BREATH_OPTO_DUTY_STEP  64         // 步长 4x → 渐亮/渐灭各 4 步 (~0.5s 周期)
+#define  BREATH_OPTO_DUTY_STEP  64         // 步长 8x → 渐亮/渐灭各 2 步 (~0.55s 周期, 光耦有信号加速)
 #define  BREATH_OPTO_HOLD_TICKS 1          // 保持 50ms
 
 /* 看门狗超时: Fsys=60MHz, WDOG_CLK=Fsys/131072≈458Hz, 0xFF≈558ms */