public void StartReading()
{
//We always want to read SCAN_RATE samples per channel
int scanRate = _daqs.Length * SCAN_RATE;
int iteration = 0;
while (_continueReading)
{
int memHandle = MccDaq.MccService.WinBufAlloc(scanRate);
MccDaq.MccBoard theBoard = new MccDaq.MccBoard(0);
ushort[] buffer = new ushort[scanRate];
float[] outVal = new float[(int)scanRate];
MccDaq.ErrorInfo stat = new MccDaq.ErrorInfo();
int scannedRate = 1000;
stat = theBoard.AInScan(0, _daqs.Length - 1, scanRate, ref scannedRate, MccDaq.Range.Bip5Volts, memHandle, MccDaq.ScanOptions.Default);
stat = MccDaq.MccService.WinBufToArray(memHandle, out buffer[0], 0, scanRate);
for (int i = 0; i < buffer.Length; i++)
{
theBoard.ToEngUnits(MccDaq.Range.Bip5Volts, buffer[i], out outVal[i]);
}
MccDaq.MccService.WinBufFree(memHandle);
Dictionary<IDAQ, IDAQPoint[]> readingDictionary = new Dictionary<IDAQ, IDAQPoint[]>();
foreach (IDAQ daq in _daqs)
{
readingDictionary.Add(daq, new IDAQPoint[SCAN_RATE]);
}
for (int i = 0; i < scanRate;)
{
foreach (IDAQ daq in _daqs)
{
DAQChannel chDaq = (DAQChannel)daq;
ReadingDetail rd = new ReadingDetail();
int currentIndex = i / _daqs.Length;
rd.ParentChannel = chDaq;
rd.Time = currentIndex + (iteration * SCAN_RATE);
rd.Reading = outVal[i];
readingDictionary[daq][currentIndex] = rd;
chDaq.ReadingDetails.Add(rd);
i++;
}
}
iteration++;
_dataRetrieved(readingDictionary);
}
lock (this)
{
_stopFinishedCallback();
}
}
private void cmdStart_Click(object sender, System.EventArgs e)
{
//Start input scan with MccBoard.AInScan
int rate = DesiredRate;
DaqBoard.AInScan(0, 0, TotalCount, ref rate, Range, hBuffer, Options);
}
public Double[] StartSingleReadingWindow(double time, string output_fmt = "OD")
{
DaqBoard = new MccDaq.MccBoard(0);
MccDaq.ErrorInfo ULStat;
int FirstPoint, NumChans = HighChan - LowChan + 1, CurIndex, CurCount;
short Status;
NumPoints = (int)(time) * Rate * NumChans;
MemHandle = MccDaq.MccService.WinBufAllocEx(10 * NumPoints);
Thread.Sleep(100);
MccDaq.ScanOptions Options = MccDaq.ScanOptions.ConvertData;
ULStat = DaqBoard.AInScan(LowChan, HighChan, NumPoints, ref Rate,
MccDaq.Range.Bip10Volts, MemHandle, Options);
DaqBoard.GetStatus(out Status, out CurCount,
out CurIndex, MccDaq.FunctionType.AiFunction);
FirstPoint = CurIndex;
// recently collected data
int N = FirstPoint + NumChans;
ushort[] addata = new ushort[N];
MccDaq.MccService.WinBufToArray(MemHandle, addata, 0, N);
List <float> channel_data = new List <float>();
for (int i = 0; i <= HighChan; ++i)
{
//sum = 0;
channel_data.RemoveRange(0, channel_data.Count);
for (int j = i; j < N; j += NumChans)
{
//sum += addata[j];
channel_data.Add(addata[j]);
}
// take median voltage value
channel_data.Sort();
ADData[i] = channel_data[(Int32)(channel_data.Count / 2)];
// convert from int to double precision voltage value
ADData[i] = (ADData[i] - 32768) / (float)3276.8;
}
DaqBoard.StopBackground(MccDaq.FunctionType.AiFunction);
MccDaq.MccService.WinBufFreeEx(MemHandle);
if (output_fmt == "OD")
{
return(convertADtoOD(ADData));
}
else
{
return(ADData);
}
}
public void startContinuousRead()
{
// per channel sampling rate ((samples per second) per channel)
MccDaq.ScanOptions Options = MccDaq.ScanOptions.Background
| MccDaq.ScanOptions.Continuous;
// collect data in background continuously
DaqBoard.AInScan(LowChan, HighChan, NumPoints,
ref Rate, MccDaq.Range.Bip10Volts, MemHandle, Options);
tmrContinuousRead.Start();
}