internal GPIOPin(uint number, GPIOPinSharingMode sharingMode, GPIOPinSharingMode openMode)
{
Disposed = false;
PinNumber = number;
_SharingMode = sharingMode;
_OpenMode = openMode;
Mode = GPIOPinMode.Input;
PinPath = GPIOController.GPIO_PATH + "/gpio" + PinNumber;
ConnectionStatus = ConnectionStatus.Connected;
switch (_OpenMode)
{
case GPIOPinSharingMode.Exclusive:
try
{
File.WriteAllText(PinPath + GPIO_PIN_DIRECTION, GPIO_PIN_DIRECTION_IN);
File.WriteAllText(PinPath + GPIO_PIN_VALUE, "0");
File.WriteAllText(PinPath + GPIO_PIN_ACTIVE_LOW, "0");
File.WriteAllText(PinPath + GPIO_PIN_EDGE, "both");
}
catch
{
Close(false);
}
break;
default:
case GPIOPinSharingMode.ReadOnlySharedAccess:
break;
}
}
public IGPIOPin OpenPin(uint number, GPIOPinSharingMode shareMode)
{
bool success = InternalDevice.TryOpenPin((int)number, GpioSharingMode.Exclusive, out GpioPin pin, out GpioOpenStatus status);
if (success)
{
return(new GPIOPin(pin, this));
}
else
{
return(null);
}
}
/// <summary>
/// Пытается открыть контакт GPIO в заданном режиме.
/// </summary>
/// <param name="pin">Номер контакта GPIO.</param>
/// <param name="shareMode">Режим открытия контакта GPIO.</param>
/// <returns></returns>
public async Task <IGPIOPin> OpenPin(uint pin, GPIOPinSharingMode shareMode)
{
await Task.Yield();
string pinPath = GPIO_PATH + "/gpio" + pin;
switch (shareMode)
{
default:
case GPIOPinSharingMode.Exclusive:
if (Directory.Exists(pinPath))
{
throw new Exception();
}
else
{
File.WriteAllText(GPIO_EXPORT_PATH, pin.ToString());
if (Directory.Exists(pinPath))
{
return(new GPIOPin(pin, GPIOPinSharingMode.Exclusive, GPIOPinSharingMode.Exclusive));
}
else
{
throw new Exception();
}
}
case GPIOPinSharingMode.ReadOnlySharedAccess:
if (Directory.Exists(pinPath))
{
bool accessible = true;
try
{
File.ReadAllText(pinPath + "/value");
}
catch
{
accessible = false;
}
if (accessible)
{
return(new GPIOPin(pin, GPIOPinSharingMode.ReadOnlySharedAccess, GPIOPinSharingMode.ReadOnlySharedAccess));
}
else
{
throw new Exception();
}
}
else
{
File.WriteAllText(GPIO_EXPORT_PATH, pin.ToString());
if (Directory.Exists(pinPath))
{
return(new GPIOPin(pin, GPIOPinSharingMode.ReadOnlySharedAccess, GPIOPinSharingMode.Exclusive));
}
else
{
throw new Exception();
}
}
}
}
