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   源码介绍

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 //    lv_obj_t * arc = lv_arc_create(lv_scr_act(), NULL);
       // lv_obj_t * lb;
       // lb = lv_label_create(lv_scr_act(), NULL);
       // lv_label_set_text(lb, "hello");


           lv_obj_t * chart1;
           chart1 = lv_chart_create(lv_scr_act(), NULL);

           lv_obj_set_size(chart1, 600, 480);
           lv_chart_set_range(chart1, 0, 100);
           lv_chart_set_div_line_count(chart1, 40, 40);
           lv_chart_set_type(chart1, LV_CHART_TYPE_LINE);
           //lv_chart_set_x_tick_length(chart1, 100, 100);
           lv_chart_series_t * ser1 = lv_chart_add_series(chart1, LV_COLOR_RED);//添加线
           lv_chart_series_t * ser2 = lv_chart_add_series(chart1, LV_COLOR_GREEN);
     
              int i=0;
        for(i=0;i<100;i =10)
            lv_chart_set_next(chart1, ser1, i);


             ser2->points[0] = 90;
             ser2->points[1] = 80;
             ser2->points[2] = 70;
             ser2->points[3] = 60;
             ser2->points[4] = 50;
             ser2->points[5] = 40;
             ser2->points[6] = 30;
             ser2->points[7] = 20;
             ser2->points[8] = 10;
             ser2->points[9] = 0;

             lv_chart_refresh(chart1);