/// <summary>
/// Unexports an exported pin.
/// </summary>
/// <param name="pin">
/// The pin to unexport.
/// </param>
private static void internal_UnexportPin(Int32 pin)
{
Debug.WriteLine("Unexporting pin " + pin.ToString());
// TODO Somehow reverse what we did in internal_ExportPin? Is there
// a way to "free" the pin in the libbcm2835 library?
UnsafeNativeMethods.bcm2835_gpio_write((uint)pin, (uint)PinState.Low);
UnsafeNativeMethods.bcm2835_gpio_fsel((uint)pin, (uint)PinMode.TRI);
ExportedPins.Remove(pin);
}
/// <summary>
/// Unexport the GPIO. This removes the /sys/class/gpio/gpioXX directory.
/// </summary>
/// <param name="pin">
/// The GPIO pin to unexport.
/// </param>
/// <param name="gpioNum">
/// The GPIO number associated with the pin.
/// </param>
private static void internal_UnexportPin(Int32 pin, String gpioNum)
{
Debug.WriteLine("Unexporting pin " + pin.ToString());
File.WriteAllText(GPIO_PATH + "unexport", gpioNum);
ExportedPins.Remove(pin);
}