public Windows10DriverPin(Windows10Driver driver, WinGpio.GpioPin pin)
{
_driver = new WeakReference <Windows10Driver>(driver);
_pin = pin;
_pinNumber = _pin.PinNumber;
// Set a reasonable default for DebounceTimeout (until .NET Core API adds a DebouceTimeout property)
_pin.DebounceTimeout = TimeSpan.FromMilliseconds(ReasonableDebounceTimeoutMillseconds);
}
public void Dispose()
{
if (_pin != null)
{
_pin.ValueChanged -= Pin_ValueChanged;
_pin.Dispose();
_pin = null;
}
_driver = null;
_fallingCallbacks = null;
_risingCallbacks = null;
GC.SuppressFinalize(this);
}
/// <summary>
/// Opens a pin in order for it to be ready to use.
/// </summary>
/// <param name="pinNumber">The pin number in the driver's logical numbering scheme.</param>
protected internal override void OpenPin(int pinNumber)
{
// Ignore calls to open an already open pin
if (_openPins.ContainsKey(pinNumber))
{
return;
}
if (pinNumber < 0 || pinNumber >= PinCount)
{
throw new ArgumentOutOfRangeException(nameof(pinNumber));
}
WinGpio.GpioPin windowsPin = s_winGpioController.OpenPin(pinNumber, WinGpio.GpioSharingMode.Exclusive);
_openPins[pinNumber] = new Windows10DriverPin(this, windowsPin);
}
private void Pin_ValueChanged(WinGpio.GpioPin sender, WinGpio.GpioPinValueChangedEventArgs args)
{
if (!_driver.TryGetTarget(out Windows10Driver driver))
{
return;
}
switch (args.Edge)
{
case WinGpio.GpioPinEdge.FallingEdge:
_fallingCallbacks?.Invoke(_driver, new PinValueChangedEventArgs(PinEventTypes.Falling, _pinNumber));
break;
case WinGpio.GpioPinEdge.RisingEdge:
_risingCallbacks?.Invoke(_driver, new PinValueChangedEventArgs(PinEventTypes.Rising, _pinNumber));
break;
}
}
protected internal override bool WaitForPinEvent(int gpioPinNumber, TimeSpan timeout)
{
VerifyPinIsInValidRange(gpioPinNumber, nameof(gpioPinNumber));
var waitEvent = new ManualResetEventSlim();
GpioPinValueChangedHandler handler = (s, a) => waitEvent.Set();
WinGpio.GpioPin pin = null;
lock (_openPinsLock)
{
pin = VerifyPinIsOpen(gpioPinNumber, nameof(gpioPinNumber)).Pin;
pin.ValueChanged += handler;
}
var result = waitEvent.Wait(timeout);
pin.ValueChanged -= handler;
return(result);
}
