/// <summary>
/// Stops the hardware ISR callbacks.
/// </summary>
public void Stop()
{
ValidateAvailable();
lock (SyncLock)
{
BoardException.ValidateResult(
IO.GpioSetIsrFunc(Pin.PinGpio, 0, 0, null));
Callback = null;
}
}
public void RegisterPinInterruptCallback(int pin, Action <int, LevelChange, uint> callback, EdgeDetection edgeDetection)
{
var gpio = (SystemGpio)pin;
PiGpioIsrDelegate cb = new PiGpioIsrDelegate((gpioPin, levelChange, time) =>
{
callback((int)gpioPin, levelChange, time);
});
Pi.IO.GpioSetIsrFunc(gpio, edgeDetection, 0, cb);
}
/// <summary>
/// Starts the hardware ISR callbacks.
/// </summary>
/// <param name="callback">The callback.</param>
/// <param name="edgeDetection">The edge detection.</param>
/// <param name="timeoutMilliseconds">The timeout milliseconds.</param>
/// <exception cref="ArgumentNullException">callback - Use Stop first.</exception>
/// <exception cref="ArgumentException">A callback is already registered. Clear the current callback before registering a new one. - callback</exception>
public void Start(PiGpioIsrDelegate callback, EdgeDetection edgeDetection, int timeoutMilliseconds)
{
ValidateAvailable();
if (callback == null)
throw new ArgumentNullException(nameof(callback), $"The callback cannot be null. Use the '{nameof(Stop)}' method instead.");
lock (SyncLock)
{
if (Callback != null)
throw new ArgumentException("A callback is already registered. Clear the current callback before registering a new one.", nameof(callback));
BoardException.ValidateResult(
IO.GpioSetIsrFunc(Pin.PinGpio, edgeDetection, timeoutMilliseconds, callback));
m_EdgeDetection = edgeDetection;
m_TimeoutMilliseconds = timeoutMilliseconds;
Callback = callback;
}
}
/// <summary>
/// Starts the hardware ISR callbacks.
/// </summary>
/// <param name="callback">The callback.</param>
/// <exception cref="NotSupportedException">IsUserGpio is false</exception>
/// <exception cref="ArgumentNullException">callback - ClearAlertCallback</exception>
/// <exception cref="ArgumentException">A callback is already registered. Clear the current callback before registering a new one. - callback</exception>
public void Start(PiGpioIsrDelegate callback)
{
Start(callback, EdgeDetection, TimeoutMilliseconds);
}
public static extern ResultCode GpioSetIsrFunc(SystemGpio gpio, EdgeDetection edge, int timeout, [In, MarshalAs(UnmanagedType.FunctionPtr)] PiGpioIsrDelegate callback);
