/// <inheritdoc/>
protected override WaitForEventResult WaitForEvent(int pinNumber, PinEventTypes eventTypes, CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
ushort queueSize;
var ftStatus = FtFunction.FT4222_GPIO_GetTriggerStatus(_ftHandle, (GpioPort)pinNumber, out queueSize);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Can't get trigger status, error {ftStatus}");
}
if (queueSize > 0)
{
Span <GpioTrigger> gpioTriggers = stackalloc GpioTrigger[queueSize];
ushort readTrigger;
ftStatus = FtFunction.FT4222_GPIO_ReadTriggerQueue(_ftHandle, (GpioPort)pinNumber, in MemoryMarshal.GetReference(gpioTriggers), queueSize, out readTrigger);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Can't read trigger status, error {ftStatus}");
}
switch (eventTypes)
{
case PinEventTypes.Rising:
if (_gpioTriggers[pinNumber].HasFlag(GpioTrigger.Rising))
{
if (gpioTriggers.ToArray().Where(m => m == GpioTrigger.Rising).Count() > 0)
{
return(new WaitForEventResult()
{
EventTypes = PinEventTypes.Rising,
TimedOut = false
});
}
}
break;
case PinEventTypes.Falling:
if (_gpioTriggers[pinNumber].HasFlag(GpioTrigger.Falling))
{
if (gpioTriggers.ToArray().Where(m => m == GpioTrigger.Falling).Count() > 0)
{
return(new WaitForEventResult()
{
EventTypes = PinEventTypes.Falling,
TimedOut = false
});
}
}
break;
case PinEventTypes.None:
default:
break;
}
}
}
return(new WaitForEventResult()
{
EventTypes = PinEventTypes.None,
TimedOut = true
});
}
