highLowFloating()

bool fl::ButtonLowLevel::highLowFloating

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)

Definition at line 21 of file button.cpp.hpp.

                                                  {
    // High-low floating detection: Set pin to high, check if high,
    // set pin to low, check if low. If both conditions are true,
    // the pin is floating and therefore the button is not pressed.
    mPin.setPinMode(DigitalPin::kOutput);
    mPin.write(true); // set pin to high
    mPin.setPinMode(DigitalPin::kInput);
    const bool was_high = mPin.high(); // check if pin is high
    mPin.setPinMode(DigitalPin::kOutput);
    mPin.write(false); // set pin to low
    mPin.setPinMode(DigitalPin::kInput);
    const bool was_low = !mPin.high(); // check if pin is low
    const bool floating =
        was_high && was_low; // if both are true, then the pin is floating
    const bool pressed =
        !floating; // if the pin is floating, then the button is not pressed
    return pressed;
}

References fl::FL_NO_EXCEPT, fl::DigitalPin::kInput, fl::DigitalPin::kOutput, and mPin.

Referenced by ButtonLowLevel(), and isPressed().

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