/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Opens the port. Throws an exception on failure
///
/// </summary>
/// <history>
/// 01 Dec 16 Cynic - Originally written
/// </history>
protected override void OpenPort()
{
string deviceFileName;
// set up now
deviceFileName = RPIDefinitions.I2CDEV_FILENAME;
// set up the i2c port number
if (I2CPort == I2CPortEnum.I2CPORT_1)
{
deviceFileName = deviceFileName.Replace("%port%", "1");
}
else
{
// should never happen
throw new Exception("Unknown I2C Port:" + I2CPort.ToString());
}
// we open the file. We have to have an open file descriptor
// note this is an external call. It has to be because the
// ioctl needs an open file descriptor it can use
i2CPortFD = ExternalFileOpen(deviceFileName, O_RDWR | O_NONBLOCK);
if (i2CPortFD <= 0)
{
throw new Exception("Could not open i2c device file:" + deviceFileName);
}
portIsOpen = true;
// Console.WriteLine("I2CPort Port Device Enabled: "+ deviceFileName);
}
public static void I2CStatusCheck(int status, I2CPort handle)
{
StatusCheckForce(status);
}
public static int Write(I2CPort port, int deviceAddress, byte *dataToSend, int sendSize)
{
return(lowLevel.HAL_WriteI2C(port, deviceAddress, dataToSend, sendSize));
}
public static int Transaction(I2CPort port, int deviceAddress, byte *dataToSend, int sendSize, byte *dataReceived, int receiveSize)
{
return(lowLevel.HAL_TransactionI2C(port, deviceAddress, dataToSend, sendSize, dataReceived, receiveSize));
}
public static int Read(I2CPort port, int deviceAddress, byte *buffer, int count)
{
return(lowLevel.HAL_ReadI2C(port, deviceAddress, buffer, count));
}
public static void Initialize(I2CPort port)
{
lowLevel.HAL_InitializeI2C(port);
}
public static void Close(I2CPort port)
{
lowLevel.HAL_CloseI2C(port);
}