public GpioInputPort(GpioPin pin, GpioInputMonitoringMode mode, GpioPullMode pullMode)
{
_pin = pin ?? throw new ArgumentNullException(nameof(pin));
if (pullMode == GpioPullMode.High)
{
_pin.SetDriveMode(GpioPinDriveMode.InputPullUp);
}
else if (pullMode == GpioPullMode.Low)
{
_pin.SetDriveMode(GpioPinDriveMode.InputPullDown);
}
else
{
_pin.SetDriveMode(GpioPinDriveMode.Input);
}
if (mode == GpioInputMonitoringMode.Polling)
{
ThreadPoolTimer.CreatePeriodicTimer(PollState, TimeSpan.FromMilliseconds(PollInterval));
}
else if (mode == GpioInputMonitoringMode.Interrupt)
{
//_pin.DebounceTimeout = TimeSpan.FromTicks(DebounceTimeoutTicks); // TODO: Set from constructor.
_pin.ValueChanged += HandleInterrupt;
}
_latestState = ReadAndConvert();
}
/// <summary>
/// Initializes a new instance of the <see cref="GpioPin"/> class.
/// </summary>
/// <param name="gpio">The gpio.</param>
internal GpioPin(SystemGpio gpio)
{
PinGpio = gpio;
PinNumber = (int)gpio;
IsUserGpio = gpio.GetIsUserGpio(Board.BoardType);
PadId = Constants.GetPad(PinGpio);
m_PullMode = Constants.GetDefaultPullMode(PinGpio);
// Instantiate the pin services
Alerts = new GpioPinAlertService(this);
Interrupts = new GpioPinInterruptService(this);
Servo = new GpioPinServoService(this);
SoftPwm = new GpioPinSoftPwmService(this);
Clock = new GpioPinClockService(this);
Pwm = new GpioPinPwmService(this);
}
public IBinaryInput GetInput(int number, GpioPullMode pullMode, GpioInputMonitoringMode monitoringMode)
{
GpioInputPort port;
lock (_openInputPorts)
{
if (_openInputPorts.TryGetValue(number, out port))
{
return(port);
}
var pin = _gpioController.OpenPin(number, GpioSharingMode.Exclusive);
port = new GpioInputPort(pin, monitoringMode, pullMode);
_openInputPorts.Add(number, port);
}
return(port);
}
public static extern ResultCode GpioSetPullUpDown(SystemGpio gpio, GpioPullMode pullMode);
