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docs(disp): document lv_refr_now (#5480)

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Gabor Kiss-Vamosi
2024-01-25 11:04:08 +01:00
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docs/porting/display.rst
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@@ -232,6 +232,16 @@ If the performance monitor is enabled, the value of :c:macro:`LV_DEF_REFR_PERIOD
consistent with the refresh period of the display to ensure that the statistical results are correct. consistent with the refresh period of the display to ensure that the statistical results are correct.
Force refreshing
----------------
Normally the invalidated areas (marked for redraw) are rendered in :cpp:func:`lv_timer_handler` in every
:cpp:macro:`LV_DEF_REFR_PERIOD`milliseconds. However, by using :cpp:func:`lv_refr_now(display)` you can ask LVGL to
redraw the invalid areas immediately. The refreshing will happen in :cpp:func:`lv_refr_now` which might take
longer time.
The parameter of :cpp:func:`lv_refr_now` is a display to refresh. If ``NULL`` is set the default display will be updated.
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