private void cmdStart_Click(object eventSender, System.EventArgs eventArgs) /* Handles cmdStart.Click */
{
cmdStart.Enabled = false;
// Select the trigger source using Mccdaq.MccBoard.SetTrigger()
// Parameters:
// TrigType :the type of triggering based on external trigger source
// LowThreshold :Low threshold when the trigger input is analog
// HighThreshold :High threshold when the trigger input is analog
float highVal = 1.0F;
MccDaq.Range Range = MccDaq.Range.Bip10Volts; // analog trigger range
ushort HighThreshold = 0;
MccDaq.ErrorInfo ULStat = DaqBoard.FromEngUnits(Range, highVal, out HighThreshold);
float lowVal = 0.1F;
ushort LowThreshold = 0;
ULStat = DaqBoard.FromEngUnits(Range, lowVal, out LowThreshold);
MccDaq.TriggerType TrigType = MccDaq.TriggerType.TrigAbove;
ULStat = DaqBoard.SetTrigger(TrigType, LowThreshold, HighThreshold);
if (ULStat.Value == MccDaq.ErrorInfo.ErrorCode.NoErrors)
{
// Collect the values with MccDaq.MccBoard.AInScan()
// Parameters:
// LowChan :the first channel of the scan
// HighChan :the last channel of the scan
// Count :the total number of A/D samples to collect
// Rate :sample rate
// Range :the range for the board
// MemHandle :Handle for Windows buffer to store data in
// Options :data collection options
int LowChan = 0; // first channel to acquire
HighChan = int.Parse(txtHighChan.Text); // last channel to acquire
if (HighChan > 7)
{
HighChan = 7;
}
txtHighChan.Text = HighChan.ToString();
int Count = NumPoints; // total number of data points to collect
int Rate = 390; // per channel sampling rate ((samples per second) per channel)
Range = MccDaq.Range.Bip5Volts; // set the range
MccDaq.ScanOptions Options = MccDaq.ScanOptions.ConvertData // return data as 12-bit values
| MccDaq.ScanOptions.ExtTrigger;
ULStat = DaqBoard.AInScan(LowChan, HighChan, Count, ref Rate, Range, MemHandle, Options);
if (ULStat.Value == MccDaq.ErrorInfo.ErrorCode.BadRange)
{
MessageBox.Show("Change the Range argument to one supported by this board.", "Unsupported Range", 0);
}
// Transfer the data from the memory buffer set up by Windows to an array
ULStat = MccDaq.MccService.WinBufToArray(MemHandle, out ADData[0], FirstPoint, Count);
for (int i = 0; i <= HighChan; ++i)
{
lblADData[i].Text = ADData[i].ToString("0");
}
for (int j = HighChan + 1; j <= 7; ++j)
{
lblADData[j].Text = "";
}
}
cmdStart.Enabled = true;
}
public int FindAnalogChansOfType(MccDaq.MccBoard DaqBoard,
int AnalogType, out int Resolution, out MccDaq.Range DefaultRange,
out int DefaultChan, out MccDaq.TriggerType DefaultTrig)
{
int ChansFound, IOType;
MccDaq.ErrorInfo ULStat;
bool CheckPretrig, CheckATrig = false;
MccDaq.Range TestRange;
bool RangeFound;
// check supported features by trial
// and error with error handling disabled
ULStat = MccDaq.MccService.ErrHandling
(MccDaq.ErrorReporting.DontPrint, MccDaq.ErrorHandling.DontStop);
TestBoard = DaqBoard;
ATrigRes = 0;
DefaultChan = 0;
DefaultTrig = TriggerType.TrigPosEdge;
DefaultRange = Range.NotUsed;
Resolution = 0;
IOType = (AnalogType & 3);
switch (IOType)
{
case ANALOGINPUT:
// Get the number of A/D channels
ULStat = DaqBoard.BoardConfig.GetNumAdChans(out ChansFound);
if (!(ULStat.Value == MccDaq.ErrorInfo.ErrorCode.NoErrors))
{
clsErrorDefs.DisplayError(ULStat);
return(ChansFound);
}
if (ChansFound > 0)
{
// Get the resolution of A/D
ULStat = DaqBoard.BoardConfig.GetAdResolution(out ADRes);
if (ULStat.Value == MccDaq.ErrorInfo.ErrorCode.NoErrors)
{
Resolution = ADRes;
}
// check ranges for a valid default
RangeFound = TestInputRanges(out TestRange);
if (RangeFound)
{
DefaultRange = TestRange;
}
}
break;
default:
// Get the number of D/A channels
ULStat = DaqBoard.BoardConfig.GetNumDaChans(out ChansFound);
if (!(ULStat.Value == MccDaq.ErrorInfo.ErrorCode.NoErrors))
{
clsErrorDefs.DisplayError(ULStat);
return(ChansFound);
}
if (ChansFound > 0)
{
ULStat = TestBoard.GetConfig(2, 0, 292, out DARes);
Resolution = DARes;
RangeFound = TestOutputRanges(out TestRange);
if (RangeFound)
{
DefaultRange = TestRange;
}
}
break;
}
CheckATrig = ((AnalogType & ATRIGIN) == ATRIGIN);
if ((ChansFound > 0) & CheckATrig)
{
ULStat = DaqBoard.SetTrigger(MccDaq.TriggerType.TrigAbove, 0, 0);
if (ULStat.Value == MccDaq.ErrorInfo.ErrorCode.NoErrors)
{
DefaultTrig = MccDaq.TriggerType.TrigAbove;
GetTrigResolution();
}
else
{
ChansFound = 0;
}
}
CheckPretrig = ((AnalogType & PRETRIGIN) == PRETRIGIN);
if ((ChansFound > 0) & CheckPretrig)
{
// if DaqSetTrigger supported, trigger type is analog
ULStat = DaqBoard.DaqSetTrigger(MccDaq.TriggerSource.TrigImmediate,
MccDaq.TriggerSensitivity.AboveLevel, 0, MccDaq.ChannelType.Analog,
DefaultRange, 0.0F, 0.1F, MccDaq.TriggerEvent.Start);
if (ULStat.Value == MccDaq.ErrorInfo.ErrorCode.NoErrors)
{
DefaultTrig = MccDaq.TriggerType.TrigAbove;
}
else
{
ULStat = DaqBoard.SetTrigger(MccDaq.TriggerType.TrigPosEdge, 0, 0);
if (ULStat.Value == MccDaq.ErrorInfo.ErrorCode.NoErrors)
{
DefaultTrig = MccDaq.TriggerType.TrigPosEdge;
}
else
{
ChansFound = 0;
}
}
}
ULStat = MccDaq.MccService.ErrHandling
(clsErrorDefs.ReportError, clsErrorDefs.HandleError);
return(ChansFound);
}
