diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/common/usb_util.h b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/common/usb_util.h
index 0c46dbcb8..67f1f9c4c 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/common/usb_util.h
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/common/usb_util.h
@@ -204,4 +204,7 @@
         9, 8, 7, 6, 5, 4, 3, 2, 1, 0
 
 
+#define upper_32_bits(n) ((uint32_t)(((n) >> 16) >> 16))
+#define lower_32_bits(n) ((uint32_t)(n))
+
 #endif