[RFC] Reduce CPU usage when idle

[Baldhead]

Hi @embeddedt,

Have you implemented the touch interrupt in the littlevgl library ?

[embeddedt]

I have not added support for touch interrupts, as while this would be useful, it’s not a high priority for my projects at the moment. I also unfortunately have less time now to spend on new LVGL features.

[Pupil]

The feature is wonderful.
My project needs it,now I do this by stopping the lvgl task handler task when mcu goes to sleep and change input to interrupt mode,when wakeup,restart the task .
If lvgl api can support this officially that would be great.

[SL2021-Dev]

Has this been implemented yet

[kisvegabor]

See here: Sleep management — LVGL documentation

Besides lv_timer_handler returns the the time to the next timer run. So your are safe to sleep then number of milliseconds.

[Baldhead]

@Baldhead

Hi,

Has the touch interrupt already been implemented in the littlevgl library ?

I would like to use interrupt of FT6236 touch controller to wake up only the display or wake up all the system or to make lib littlevgl read the touch only when the display controller sends an interrupt signal.

Thank’s.

Hi,

Has the touch interrupt already been implemented in the littlevgl library ?

Thank’s.

[Baldhead]

Some suggestion ???

[Marian_M]

Hmm your question is out of LVGL because indev callbacks is out of LVGL. You can do it as you need. For example in irq mark flag and get touch only if else simple return from callback.