private void OnPinChanged(PCA9535 sender, PCA9535.PinChangedEventArgs e) {
if (e.Pin == this.pin)
this.OnValueChanged(e.NewState);
}
public IndirectedDigitalIO(int channel, PCA9535 pca) {
this.pin = channel;
this.gpio = pca;
this.driveMode = GpioPinDriveMode.Input;
}