Add support for debouncing non-GPIO inputs. #1
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Buttons can be connected via interfaces other than GPIO; for instance, using IO expanders over I2C or SPI, or via multiplexers.
This patch adds the option to instantiate a debouncer without a pin specified; it also adds the option to pass an explicit value into
update()
.This means that you could make debouncers for buttons connected via, eg, an I2C expander; every update loop, read the values over I2C, and pass that value into the
update
method for the appropriate object.