diff --git a/README.md b/README.md
index cdb1b1b..8ad2bde 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,10 @@
 # M5Dial-LVGL
 LVGL porting for M5Dial
+
+## Usage
+Call `m5dial_lvgl_init()` first, `m5dial_lvgl_next()` in a loop.
+Please refer to examples for more details.
+
+## License
+
+[MIT](LICENSE)