mirror of
https://github.com/lvgl/lvgl.git
synced 2025-01-28 07:03:00 +08:00
34 lines
1.1 KiB
ReStructuredText
34 lines
1.1 KiB
ReStructuredText
================
|
|
Sleep management
|
|
================
|
|
|
|
The MCU can go to sleep when no user input happens. In this case, the
|
|
main ``while(1)`` should look like this:
|
|
|
|
.. code:: c
|
|
|
|
while(1) {
|
|
/*Normal operation (no sleep) in < 1 sec inactivity*/
|
|
if(lv_display_get_inactive_time(NULL) < 1000) {
|
|
lv_timer_handler();
|
|
}
|
|
/*Sleep after 1 sec inactivity*/
|
|
else {
|
|
timer_stop(); /*Stop the timer where lv_tick_inc() is called*/
|
|
sleep(); /*Sleep the MCU*/
|
|
}
|
|
my_delay_ms(5);
|
|
}
|
|
|
|
You should also add the following lines to your input device read
|
|
function to signal a wake-up (press, touch or click etc.) has happened:
|
|
|
|
.. code:: c
|
|
|
|
lv_tick_inc(LV_DEF_REFR_PERIOD); /*Force task execution on wake-up*/
|
|
timer_start(); /*Restart the timer where lv_tick_inc() is called*/
|
|
lv_timer_handler(); /*Call `lv_timer_handler()` manually to process the wake-up event*/
|
|
|
|
In addition to :cpp:func:`lv_display_get_inactive_time` you can check
|
|
:cpp:func:`lv_anim_count_running` to see if all animations have finished.
|