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Signed-off-by: Keith Packard <keithp@keithp.com>
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This returns the current state of the button; useful to check what the
value is at startup.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Signed-off-by: Keith Packard <keithp@keithp.com>
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Instead of waiting for a while after the transition to decide if it
has stuck, signal the event right away and then ignore other
transitions for the debounce interval.
This seems to work just as reliably, but has the benefit of
eliminating button latency at press time.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This "can't" happen, but it's not unreasonable to have a default
return value.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This splits the fast-timer portion out of the debounce helper code and
shares that with the quadrature driver which now uses it directly.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Signed-off-by: Keith Packard <keithp@keithp.com>
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These were neglected in the commit which was supposed to include them
Signed-off-by: Keith Packard <keithp@keithp.com>
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