/// <summary>
/// Polling a voltage data.
/// </summary>
/// <returns>System.Double.</returns>
/// <exception cref="InvalidOperationException">
/// AI_ReadChannel32 Fail, error: " + err
/// or
/// AI_VoltScale32 Fail, error: " + err
/// </exception>
public double VoltagePolling()
{
double volt;
uint value;
short err = DASK.AI_ReadChannel32(GetHandle(), config_para.ai_select_channel, config_para.ai_chnl_range, out value);
if (err < 0)
{
throw new InvalidOperationException("AI_ReadChannel32 Fail, error: " + err);
}
err = DASK.AI_VoltScale32(GetHandle(), config_para.ai_chnl_range, (int)value, out volt);
if (err < 0)
{
throw new InvalidOperationException("AI_VoltScale32 Fail, error: " + err);
}
return(volt);
}
/// <summary>
/// Transfers the buffer.
/// This function mark the buffer is transfered during double buffer operation.
/// Check the double buffer overrun to make sure data is not lost.
/// </summary>
/// <param name="dataArray">The data array.</param>
/// <returns>System.Int16.</returns>
/// <exception cref="InvalidOperationException">Double buffer overrun</exception>
public short TransferBuffer(Int32[] dataArray)
{
short err = DASK.NoError;
ushort overrunFlag = 0;
IntPtr latestIndex = config_para.ai_raw_data_buf[(config_para.ai_buf_ready_idx + 1) % 2];
Marshal.Copy(config_para.ai_raw_data_buf[config_para.ai_buf_ready_idx], dataArray, 0, (int)GetSampleCountsPerChannel());
DASK.AI_VoltScale32(GetHandle(), config_para.ai_chnl_range, dataArray[GetSampleCountsPerChannel() - 2], out latestVoltageValue);
latestEncoderValue = Math.Abs((dataArray[GetSampleCountsPerChannel() - 1] * 256) / 256);
config_para.ai_buf_ready_idx += 1;
config_para.ai_buf_ready_idx %= 2;
err = DASK.AI_AsyncDblBufferHandled(GetHandle());
err = DASK.AI_AsyncDblBufferOverrun(GetHandle(), 0, out overrunFlag);
if (overrunFlag != 0)
{
throw new InvalidOperationException("Double buffer overrun");
}
return(err);
}