mirror of
https://github.com/lvgl/lvgl.git
synced 2025-01-14 06:42:58 +08:00
32 lines
1.0 KiB
Markdown
32 lines
1.0 KiB
Markdown
|
```eval_rst
|
||
|
|
.. include:: /header.rst
|
||
|
|
:github_url: |github_link_base|/porting/sleep.md
|
||
|
|
```
|
||
|
|
# Sleep management
|
||
|
|
|
||
|
|
The MCU can go to sleep when no user input happens. In this case, the main `while(1)` should look like this:
|
||
|
|
|
||
|
|
```c
|
||
|
|
while(1) {
|
||
|
|
/*Normal operation (no sleep) in < 1 sec inactivity*/
|
||
|
|
if(lv_disp_get_inactive_time(NULL) < 1000) {
|
||
|
|
lv_task_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 below lines to your input device read function if a wake-up (press, touch or click etc.) happens:
|
||
|
|
```c
|
||
|
|
lv_tick_inc(LV_DISP_DEF_REFR_PERIOD); /*Force task execution on wake-up*/
|
||
|
|
timer_start(); /*Restart the timer where lv_tick_inc() is called*/
|
||
|
|
lv_task_handler(); /*Call `lv_task_handler()` manually to process the wake-up event*/
|
||
|
|
```
|
||
|
|
|
||
|
|
In addition to `lv_disp_get_inactive_time()` you can check `lv_anim_count_running()` to see if every animations are finished.
|