lvgl/docs/porting/task-handler.md

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Task Handler

To handle the tasks of LVGL you need to call lv_timer_handler() periodically in one of the followings:

• while(1) of main() function
• timer interrupt periodically (low priority then lv_tick_inc())
• an OS task periodically

The timing is not critical but it should be about 5 milliseconds to keep the system responsive.

Example:

while(1) {
  lv_timer_handler();
  my_delay_ms(5);
}

To learn more about timers visit the Timer section.