diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c b/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c
index e6638c6..540ff4f 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/rs485_700bs.c
@@ -90,10 +90,10 @@ static void rs485_send(const uint8_t *data, uint8_t len)
 /* 直接从原始测量值计算线圈频率 (Hz)，不依赖 BLE 报告通道 */
 static uint32_t rs485_get_freq(void)
 {
-    uint32_t capvd = g_loop_acs_info.loop_capvd;  // TMR0 捕获累加值
-    if (capvd == 0 || loop1_LPCNT == 0) return 0;
-    /* freq = FREQ_SYS / (capvd / LPCNT) + 360 (补偿值) */
-    return (uint32_t)((uint64_t)FREQ_SYS * loop1_LPCNT / capvd) + 360;
+    extern uint32_t loop1_CAPVD;  // vd1_task() 实时更新的 IIR 滤波值
+    if (loop1_CAPVD == 0 || loop1_LPCNT == 0) return 0;
+    /* freq = FREQ_SYS / (CAPVD / LPCNT) + 360 (补偿值) */
+    return (uint32_t)((uint64_t)FREQ_SYS * loop1_LPCNT / loop1_CAPVD) + 360;
 }
 
 /* 0xFA — 查询有车状态 + 线圈好坏 */