/// <summary>
/// Polling an encorder data.
/// </summary>
/// <returns>System.Double.</returns>
/// <exception cref="InvalidOperationException">GPTC_Read Fail, error: " + err</exception>
public double EncoderPolling()
{
uint value;
short err = DASK.GPTC_Read(GetHandle(), gptcCtrl.GCtr[0], out value);
if (err < 0)
{
throw new InvalidOperationException("GPTC_Read Fail, error: " + err);
}
return(Math.Abs((value * 256) / 256));;
}