public IEnumerable <byte> FindDevices()
{
using (var xHandle = OpenController())
{
Console.WriteLine("Device opened!");
for (byte i = 0; i < 128; i++)
{
var xResult = LibC.Ioctl(xHandle, Consts.I2C_Slave, new IntPtr(i));
if (xResult != 0)
{
continue;
}
try
{
var xByteRead = I2CDevice.DoReadByte(xHandle);
}
catch
{
continue;
}
yield return(i);
}
}
}
internal static byte DoReadByte(SafeFileHandle handle)
{
var xBuff = new byte[1];
var xRead = LibC.Read(handle, xBuff, xBuff.Length);
return(xBuff[0]);
}
public override I2CDeviceBase OpenDevice(ushort number)
{
var xHandle = OpenController();
var xError = LibC.Ioctl(xHandle, Consts.I2C_Slave, new IntPtr(number));
if (xError != 0)
{
throw new InvalidOperationException("Ioctl returned " + xError);
}
return(new I2CDevice(xHandle, number));
}
private SafeFileHandle OpenController()
{
var xHandle = LibC.Open("/dev/i2c-" + mNumber, Consts.OPEN_READ_WRITE);
if (xHandle < 0)
{
throw new InvalidOperationException("Open return " + xHandle);
}
var xSafeHandle = new SafeFileHandle(new IntPtr(xHandle), true);
return(xSafeHandle);
}
public override unsafe void WriteRead(byte[] buff)
{
fixed(byte *xBufferPointer = &buff[0])
{
var xMessage = new I2CMessage();
xMessage.Length = (ushort)buff.Length;
xMessage.Buffer = xBufferPointer;
xMessage.SlaveAddress = mDeviceAddress;
I2CMessage *xMessagePointer = &xMessage;
var xMessageContainer = new I2CReadWriteData();
xMessageContainer.Messages = xMessagePointer;
xMessageContainer.MessageCount = 1;
I2CReadWriteData *xMessageContainerPtr = &xMessageContainer;
var xResult = LibC.Ioctl(mHandle, Consts.I2C_RDWR, new IntPtr(xMessageContainerPtr));
if (xResult < 0)
{
throw new InvalidOperationException("Ioctl returned " + xResult);
}
}
}
public override void Write(byte[] buff)
{
var xRead = LibC.Write(mHandle, buff, buff.Length);
}