I know timers are not designed for that purpose but Input Capture channels have unique Input Filter property which I think could be used to debounce a button. It just needs to be configured a way so interrupt is triggered on external signal rising (or falling) edge.
I cannot figure out how to configure it in CubeMX. It would also be good to know which channel triggered the interrupt - in case more than one channel is used.
Please advise.
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It is actually quite trivial, basic setup (below) will do + timer interrupt enabled.
The only catch is that channels on the same timer have to be enabled separately:
HAL_TIM_IC_Start_IT(&htim4, TIM_CHANNEL_3);
HAL_TIM_IC_Start_IT(&htim4, TIM_CHANNEL_4);This does NOT work:
HAL_TIM_IC_Start_IT(&htim4, TIM_CHANNEL_3 | TIM_CHANNEL_4);Next, within HAL_TIM_IC_CaptureCallback() interrupt handler button pressed can be identified using htim->Channel
That's all.
It is actually quite trivial, basic setup (below) will do + timer interrupt enabled.
The only catch is that channels on the same timer have to be enabled separately:
HAL_TIM_IC_Start_IT(&htim4, TIM_CHANNEL_3);
HAL_TIM_IC_Start_IT(&htim4, TIM_CHANNEL_4);This does NOT work:
HAL_TIM_IC_Start_IT(&htim4, TIM_CHANNEL_3 | TIM_CHANNEL_4);Next, within HAL_TIM_IC_CaptureCallback() interrupt handler button pressed can be identified using htim->Channel
That's all.
