private unsafe void Initialize()
{
if (_deviceFileDescriptor >= 0)
{
return;
}
string deviceFileName = $"{DevicePath}-{_settings.BusId}";
lock (s_initializationLock)
{
if (_deviceFileDescriptor >= 0)
{
return;
}
_deviceFileDescriptor = Interop.open(deviceFileName, FileOpenFlags.O_RDWR);
if (_deviceFileDescriptor < 0)
{
throw new IOException($"Error {Marshal.GetLastWin32Error()}. Can not open I2C device file '{deviceFileName}'.");
}
I2cFunctionalityFlags tempFlags;
int result = Interop.ioctl(_deviceFileDescriptor, (uint)I2cSettings.I2C_FUNCS, new IntPtr(&tempFlags));
if (result < 0)
{
_functionalities = 0;
}
_functionalities = tempFlags;
}
}
private unsafe void Initialize()
{
if (_deviceFileDescriptor >= 0)
{
return;
}
string deviceFileName = $"{DevicePath}-{_settings.BusId}";
_deviceFileDescriptor = open(deviceFileName, FileOpenFlags.O_RDWR);
if (_deviceFileDescriptor < 0)
{
throw Utils.CreateIOException($"Cannot open I2c device file '{deviceFileName}'", _deviceFileDescriptor);
}
fixed(I2cFunctionalityFlags *functionalitiesPtr = &_functionalities)
{
int ret = ioctl(_deviceFileDescriptor, (uint)I2cSettings.I2C_FUNCS, new IntPtr(functionalitiesPtr));
if (ret < 0)
{
_functionalities = 0;
}
}
}
