/// <summary>
/// Start polling for pin events
/// </summary>
/// <param name="cancellationToken">Optional cancellation token</param>
/// <returns>Asynchronous task</returns>
public unsafe Task StartMonitoring(CancellationToken cancellationToken = default)
{
if (_reqFd < 0)
{
throw new IOException("Pin is not configured");
}
return(Task.Run(() =>
{
gpioevent_data eventData = new gpioevent_data();
int sizeOfEventData = Marshal.SizeOf(typeof(gpioevent_data));
do
{
if (Interop.read(_reqFd, new IntPtr(&eventData), sizeOfEventData) == sizeOfEventData)
{
Value = (eventData.id == (uint)GpioEvent.GPIOEVENT_EVENT_RISING_EDGE);
PinChanged?.Invoke(this, Value);
}
else
{
throw new IOException("Read returned invalid size");
}
}while (!cancellationToken.IsCancellationRequested);
}));
}
/// <summary>
/// Start polling for pin events
/// </summary>
/// <param name="cancellationToken"></param>
public unsafe void StartMonitoring(int pollInterval = 500, CancellationToken cancellationToken = default)
{
if (_reqFd < 0)
{
throw new IOException("Pin is not configured");
}
_ = Task.Run(() =>
{
gpioevent_data eventData = new gpioevent_data();
int sizeOfEventData = Marshal.SizeOf(typeof(gpioevent_data));
do
{
if (Interop.read(_reqFd, new IntPtr(&eventData), sizeOfEventData) == sizeOfEventData)
{
Value = (eventData.id == (uint)GpioEvent.GPIOEVENT_EVENT_RISING_EDGE);
PinChanged?.Invoke(this, Value);
}
else
{
// FIXME: Handle exception here
Console.WriteLine("Oh snap! Read returned invalid size");
break;
}
} while (!cancellationToken.IsCancellationRequested);
}, cancellationToken);
}
