/// <summary>
/// Sets pin value.
/// </summary>
public void Write(GpioPinValue value)
{
var ret = NativeGpio.Write(_handle, value == GpioPinValue.High ? 1 : (uint)0);
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
}
private void SetIntteruptedCallback()
{
_interruptedEventCallback = OnInterrupted;
var ret = NativeGpio.SetInterruptedCb(_handle, _interruptedEventCallback, IntPtr.Zero);
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
}
/// <summary>
/// Gets pin value.
/// </summary>
/// <returns>Pin value</returns>
public GpioPinValue Read()
{
var ret = NativeGpio.Read(_handle, out uint value);
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
return(value == 1 ? GpioPinValue.High : GpioPinValue.Low);
}
/// <summary>
/// Disposes GPIO.
/// </summary>
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
NativeGpio.UnsetInterruptedCb(_handle);
NativeGpio.Close(_handle);
_disposed = true;
}
/// <summary>
/// Opens a GPIO pin.
/// </summary>
/// <param name="pinNumber">The GPIO pin number.</param>
/// <param name="mode">GPIO direction.</param>
public GpioPin(int pinNumber, GpioPinDriveMode mode)
{
var ret = NativeGpio.Open(pinNumber, out _handle);
try
{
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
PinNumber = pinNumber;
switch (mode)
{
case GpioPinDriveMode.Input:
ret = NativeGpio.SetEdgeMode(_handle, NativeGpio.EdgeType.Both);
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
ret = NativeGpio.SetDirection(_handle, NativeGpio.Direction.In);
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
SetIntteruptedCallback();
break;
case GpioPinDriveMode.OutputInitiallyLow:
ret = NativeGpio.SetDirection(_handle, NativeGpio.Direction.OutLow);
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
break;
case GpioPinDriveMode.OutputInitiallyHigh:
ret = NativeGpio.SetDirection(_handle, NativeGpio.Direction.OutHigh);
if (ret != ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
break;
}
}
catch (Exception err)
{
Dispose();
throw;
}
}
