diff --git a/BLE/DLD110S_Peripheral_28K/APP/peripheral_main.c b/BLE/DLD110S_Peripheral_28K/APP/peripheral_main.c
index ec54652..7b4f0e0 100644
--- a/BLE/DLD110S_Peripheral_28K/APP/peripheral_main.c
+++ b/BLE/DLD110S_Peripheral_28K/APP/peripheral_main.c
@@ -34,6 +34,7 @@ uint8_t g_flag_bt_state = 0;  //  0 蓝牙没有连接，1 有蓝牙连接
 uint8_t g_flag_output = 0;
 uint32_t g_xn_counter = 0;
 uint8_t g_function_mode = 0;
+uint32_t g_sys_freq = 0;
 
 #define RLY1_ON               (R32_PA_OUT |= BV(8))
 #define RLY1_OFF              (R32_PA_OUT &= ~BV(8))