diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
index 46dd290..27b1ced 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c
@@ -39,6 +39,12 @@ void clear_buf_dbn_ble(Buf_DBN_BLE * buf)
 {
     uint8_t i = 0;
 
+    if(buf->flag)
+    {
+        PRINT("CLEAR busy resp: amt=%d seq=%d off=%d ret=%08lx\n",
+               buf->pkg_amount, buf->pkg_seq, buf->dat_offset,
+               (unsigned long)__builtin_return_address(0));
+    }
 
     buf->flag = 0;
     buf->magic = 0;