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1.0 KiB
1.0 KiB
Timer Handler
To handle the tasks of LVGL you need to call lv_timer_handler()
periodically in one of the following:
- while(1) of main() function
- timer interrupt periodically (lower priority than
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);
}
If you want to use lv_timer_handler()
in a super-loop, a helper functionlv_timer_handler_run_in_period()
is provided to simplify the porting:
while(1) {
...
lv_timer_handler_run_in_period(5); /* run lv_timer_handler() every 5ms */
...
}
In an OS environment, you can use it together with the delay or sleep provided by OS to release CPU whenever possible:
while (1) {
lv_timer_handler_run_in_period(5); /* run lv_timer_handler() every 5ms */
my_delay_ms(5); /* delay 5ms to avoid unnecessary polling */
}
To learn more about timers visit the Timer section.