/// <summary>
/// Opens the UART slave device.
/// </summary>
/// <param name="port">The UART port number that the slave device is connected.</param>
public SerialPort(int port)
{
var ret = NativeUart.Open(port, out _handle);
if (ret != Internals.Errors.ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
}
/// <summary>
/// Disposes Uart object.
/// </summary>
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
NativeUart.Close(_handle);
_disposed = true;
}
/// <summary>
/// Writes the bytes data to the UART slave device.
/// </summary>
/// <param name="buffer">The byte array that contains the data to write to the device.</param>
/// <param name="offset">The offset in buffer at which to begin copying bytes.</param>
/// <param name="count">The number of bytes to write</param>
public int Write(byte[] buffer, int offset, int count)
{
if (count > buffer.Length - offset)
{
throw new Exception("Can not write more bytes than the buffer holds.");
}
byte[] tmpBuffer = new byte[count];
Array.Copy(buffer, offset, tmpBuffer, 0, count);
var length = Convert.ToUInt32(count);
var ret = NativeUart.Write(_handle, tmpBuffer, length);
if (ret < Internals.Errors.ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
return((int)ret);
}
/// <summary>
/// Reads the bytes data from the UART slave device.
/// </summary>
/// <param name="buffer">The output byte array.</param>
/// <param name="offset">The offset in buffer at which to write the bytes.</param>
/// <param name="count">The number of bytes to read.</param>
/// <returns>The number of bytes read.</returns>
public int Read(byte[] buffer, int offset, int count)
{
if (count > buffer.Length - offset)
{
throw new Exception("Can not read more bytes than the buffer can hold.");
}
byte[] tmpBuffer = new byte[count];
var length = Convert.ToUInt32(count);
var ret = NativeUart.Read(_handle, tmpBuffer, length);
if (ret < Internals.Errors.ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
Array.Copy(tmpBuffer, 0, buffer, offset, (int)ret);
return((int)ret);
}
