Add support for setting the channel input filter #2136
Merged
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Summary
This PR implements the following feature
Currently, HardwareTimer sets the input channel filter to none, any time the mode of the timer is set.
This PR enables the input filter to be set along with the mode.
It is possible to enable setting the input filter separately from the mode if wanted.
Validation
Tested with a waveform generator vs sketch outputting pulse widths + levels