Button.cpp

#include "Button.h"

Button::Button(uint8_t pin, uint32_t dbTime)
{
    _pin = pin;
    _dbTime = dbTime;
    pinMode(_pin, INPUT);
    _state = digitalRead(_pin);
    _time = millis();
    _lastState = _state;
    _changed = 0;
    _lastChange = _time;
}


uint8_t Button::read(void)
{
    static uint32_t ms;
    static uint8_t pinVal;

    ms = millis();
    pinVal = digitalRead(_pin);
    if (ms - _lastChange < _dbTime) {
        _time = ms;
        _changed = 0;
        return _state;
    }
    else {
        _lastState = _state;
        _state = pinVal;
        _time = ms;
        if (_state != _lastState)   {
            _lastChange = ms;
            _changed = 1;
        }
        else {
            _changed = 0;
        }
        return _state;
    }
}

uint8_t Button::isPressed(void)
{
    return _state == 0 ? 0 : 1;
}

uint8_t Button::isReleased(void)
{
    return _state == 0 ? 1 : 0;
}

uint8_t Button::wasPressed(void)
{
    return _state && _changed;
}

uint8_t Button::wasReleased(void)
{
    return !_state && _changed;
}

uint8_t Button::pressedFor(uint32_t ms)
{
    return (_state == 1 && _time - _lastChange >= ms) ? 1 : 0;
}

uint8_t Button::releasedFor(uint32_t ms)
{
    return (_state == 0 && _time - _lastChange >= ms) ? 1 : 0;
}
uint32_t Button::lastChange(void)
{
    return _lastChange;
}