1、initial code

widgets/speedmeter_private.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "lvgl.h"
+#include "lvgl_private.h"
+
+struct _lv_speedmeter_t
+{
+    lv_obj_t obj;
+    float speed;
+    float max_speed;
+    lv_obj_t* speed_arc;
+    lv_obj_t* speed_unit_label;
+    lv_obj_t* speed_label;
+};