internal static void OpenPin(GpioController controller, int pinNumber, bool asOutput, ref GpioPin pin)
{
GpioOpenStatus statusResult;
if (!controller.TryOpenPin(pinNumber, GpioSharingMode.Exclusive, out pin, out statusResult))
throw new Exception(string.Format("There was an exception opening GPIO pin {0}. The operation returned a status of {1}", pinNumber, statusResult.ToString()));
// Pins default to open as input.
if (asOutput)
{
pin.SetDriveMode(GpioPinDriveMode.Output);
pin.Write(GpioPinValue.High);
}
else
pin.SetDriveMode(GpioPinDriveMode.InputPullUp);
}
private void InitializeGpio()
{
_gpioController = GpioController.GetDefault();
List<int> keysToRemove = new List<int>();
foreach (int key in GpioPinDictionary.Keys)
{
GpioPin gpioPin;
GpioOpenStatus status;
_gpioController.TryOpenPin(key, GpioSharingMode.SharedReadOnly, out gpioPin, out status);
if (status == GpioOpenStatus.PinOpened)
{
Pin pin = GpioPinDictionary[key];
pin.GpioPin = gpioPin;
pin.IsActive = gpioPin.Read() == GpioPinValue.High;
gpioPin.ValueChanged += GpioPinOnValueChanged;
} else if (status == GpioOpenStatus.PinUnavailable)
{
keysToRemove.Add(key);
}
}
foreach (int i in keysToRemove)
{
GpioPinDictionary[i].IsUnavailable = true;
GpioPinDictionary.Remove(i);
}
}