diff --git a/demo/bouffalolab/README.md b/demo/bouffalolab/README.md
new file mode 100644
index 00000000..16287770
--- /dev/null
+++ b/demo/bouffalolab/README.md
@@ -0,0 +1 @@
+[bl_mcu_sdk_usb_examples](https://github.com/bouffalolab/bl_mcu_sdk/tree/master/examples/usb)
\ No newline at end of file
diff --git a/port/bouffalolab/bl702/README.md b/port/bouffalolab/bl702/README.md
new file mode 100644
index 00000000..796a8c70
--- /dev/null
+++ b/port/bouffalolab/bl702/README.md
@@ -0,0 +1,2 @@
+[bl_mcu_sdk_usb_dc](https://github.com/bouffalolab/bl_mcu_sdk/blob/master/bsp/bsp_common/usb/usb_dc.c)
+[bl_mcu_sdk_hal_usb](https://github.com/bouffalolab/bl_mcu_sdk/blob/master/drivers/bl702_driver/hal_drv/src/hal_usb.c)