1、initial code

widgets/speedmeter.h

@@ -0,0 +1,12 @@
+#pragma once
+#include "lvgl.h"
+
+typedef struct _lv_speedmeter_t lv_speedmeter_t;
+
+lv_obj_t* lv_speedmeter_create(lv_obj_t* parent,int max_speed,const char* unit);
+
+void lv_speedmeter_set_speed(lv_obj_t* obj, float speed);
+
+float lv_speedmeter_get_speed(lv_obj_t* obj);
+
+void lv_speedmeter_set_unit_label(lv_obj_t* obj, char* label);