What MCU/Processor/Board and compiler are you using?
stm32h743ii, stm32cubeide, gcc
What LVGL version are you using?
v 7
What do you want to achieve?
Two chart update same time and does not lag
Code to reproduce
lv_obj_t *cont = lv_cont_create(lv_scr_act(), NULL);
lv_obj_set_size(cont, 600, 420);
lv_obj_set_pos(cont, 200, 60);
lv_obj_set_style_local_bg_color(cont, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,LV_COLOR_BLACK);
lv_obj_set_style_local_border_width(cont, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,0);
pchart = lv_chart_create(cont, NULL);
lv_obj_set_size(pchart, 580, 150 );
lv_obj_set_pos(pchart, 10, 30 );
lv_chart_set_type(pchart, LV_CHART_TYPE_LINE);
lv_chart_set_update_mode(pchart, LV_CHART_UPDATE_MODE_CIRCULAR);
pseries = lv_chart_add_series(pchart, vl_graph_clr);
lv_chart_set_point_count(pchart, 100);
applychartstyles(pchart);
lv_obj_set_style_local_bg_color(pchart, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,RECTANGLE_OUTLINE);
lv_chart_set_y_tick_texts(pchart,“100\n\n\n\n50\n\n\n\n\n0”,4,LV_CHART_AXIS_DRAW_LAST_TICK);
vchart = lv_chart_create(cont, NULL);
lv_obj_set_size(vchart, 580, 150 );
lv_obj_set_pos(vchart, 10, 250 );
lv_chart_set_type(vchart, LV_CHART_TYPE_LINE);
lv_chart_set_update_mode(vchart, LV_CHART_UPDATE_MODE_CIRCULAR);
vseries = lv_chart_add_series(vchart, vl_graph_clr);
lv_chart_set_point_count(vchart, 100);
applychartstyles(vchart);
lv_obj_set_style_local_bg_color(vchart, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT,RECTANGLE_OUTLINE);
lv_chart_set_y_tick_texts(vchart,“100\n\n\n\n50\n\n\n\n\n0”,4,LV_CHART_AXIS_DRAW_LAST_TICK);
//while loop given every 20ms once
lv_task_handler();
lv_chart_set_next(vchart, vseries,adc_graph_data);
lv_chart_set_next(pchart, pseries,adc_graph_data);
Two chart plot at same update
After 2min one chart and another chart plot some delay occur (chart data lag)
