private void OnPinChanged(NRF52840_GPIO.Pin pin, bool value)
{
if (pin.Direction != NRF52840_GPIO.PinDirection.Output ||
!TryGetChannel(pin, out var channel) ||
channel.Mode != Mode.Event)
{
return;
}
switch (channel.Polarity)
{
case Polarity.None:
channel.EventPending = false;
break;
case Polarity.LoToHi:
channel.EventPending = !channel.CurrentState && value;
break;
case Polarity.HiToLo:
channel.EventPending = channel.CurrentState && !value;
break;
case Polarity.Toggle:
channel.EventPending = channel.CurrentState != value;
break;
}
channel.CurrentState = value;
UpdateInterrupt();
}
private bool TryGetChannel(NRF52840_GPIO.Pin pin, out Channel channel)
{
if (pinToChannelMapping.TryGetValue(pin, out channel))
{
return(true);
}
foreach (var ch in channels)
{
if (pin.Id == ch.SelectedPin && pin.Parent == ports[ch.SelectedPort])
{
pinToChannelMapping[pin] = ch;
channel = ch;
return(true);
}
}
channel = null;
return(false);
}
private bool TryGetPin(out NRF52840_GPIO.Pin pin)
{
var port = parent.ports[SelectedPort];
if (port == null)
{
parent.Log(LogLevel.Warning, "Trying to access a not connected port #{0}", SelectedPort);
pin = null;
return(false);
}
if (SelectedPin >= port.Pins.Length)
{
parent.Log(LogLevel.Warning, "Trying to access a not existing pin #{0} in port #{1}", SelectedPin, SelectedPort);
pin = null;
return(false);
}
pin = port.Pins[SelectedPin];
return(true);
}