diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.c
index 9356a2e64..674fe4639 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.c
@@ -842,6 +842,7 @@ int usbh_initialize(uint32_t id, struct usbh_bus *usb)
     return 0;
 }
 
+/* TODO: This function will be replaced by usbh_control_transfer_xiuos.*/
 int usbh_control_transfer(usbh_pipe_t pipe, struct usb_setup_packet *setup, uint8_t *buffer)
 {
     struct usbh_urb *urb;
@@ -1073,6 +1074,7 @@ int usbh_get_devaddr(struct usbh_hubport *hport)
     return dev_addr;
 }
 
+/* TODO: This function will be replaced by usbh_pipe_free_xiuos.*/
 int usbh_pipe_free(usbh_pipe_t pipe)
 {
     return 0;
diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.h b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.h
index e31185baa..3cba17813 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.h
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/core/usbh_core.h
@@ -71,6 +71,7 @@ extern "C" {
 #define CLASS_INFO_DEFINE __attribute__((section("usbh_class_info"))) __USED __ALIGNED(1)
 #endif
 
+/* TODO: This function will be replaced by usbh_control_urb_fill_xiuos.*/
 static inline void usbh_control_urb_fill(struct usbh_urb *urb,
                                          usbh_pipe_t pipe,
                                          struct usb_setup_packet *setup,
@@ -89,6 +90,7 @@ static inline void usbh_control_urb_fill(struct usbh_urb *urb,
     urb->arg = arg;
 }
 
+/* TODO: This function will be replaced by usbh_bulk_urb_fill_xiuos.*/
 static inline void usbh_bulk_urb_fill(struct usbh_urb *urb,
                                       usbh_pipe_t pipe,
                                       uint8_t *transfer_buffer,
@@ -106,6 +108,7 @@ static inline void usbh_bulk_urb_fill(struct usbh_urb *urb,
     urb->arg = arg;
 }
 
+/* TODO: This function will be replaced by usbh_int_urb_fill_xiuos.*/
 static inline void usbh_int_urb_fill(struct usbh_urb *urb,
                                      usbh_pipe_t pipe,
                                      uint8_t *transfer_buffer,