private void StopDaq()
{
//Stop Daquisition
_daqBoard.StopBackground(MccDaq.FunctionType.AiFunction);
//Reset buttons and flag for chart update
_isReading = false;
MccService.WinBufFreeEx(_dataPtr);
CanStart = true;
CanStop = false;
CanBrowse = true;
Status = "Stopped";
StatusBrush = Brushes.Red;
}
private void StartDaq()
{
//Insert the range value into the table
if (CanSelectRange)
{
Database.InsertInfoCommand.Parameters.Add(new SQLiteParameter("Resolution", (int)Resolution));
Database.ExecuteCommand(Database.InsertInfoCommand);
CanSelectRange = false;
}
//Begin Daquisition
int packetSize = 16;
_dataPtr = MccService.ScaledWinBufAllocEx(32);
ScanOptions options = ScanOptions.SingleIo | ScanOptions.Continuous | ScanOptions.Background | ScanOptions.ScaleData;
if (SamplePeriod > 1000)
{
options |= ScanOptions.HighResRate;
}
if (DaqBoard.BoardName == "USB-1608G")
{
packetSize = 8;
}
if (DaqBoard.BoardName == "USB-1408FS")
{
MccService.WinBufFreeEx(_dataPtr);
_dataPtr = MccService.WinBufAllocEx(4);
packetSize = 2;
options = ScanOptions.SingleIo | ScanOptions.Continuous | ScanOptions.Background;
}
_daqBoard.AInScan(0, numChannels, 2 * packetSize, ref _sampleRate, Resolution, _dataPtr, options);
_isReading = true;
BeginChartUpdateAsync();
//Set buttons and status label to Running state
CanStart = false;
CanStop = true;
CanBrowse = false;
Status = "Running";
StatusBrush = Brushes.LimeGreen;
}
static void Main(string[] args)
{
System.ConsoleKeyInfo cki = new System.ConsoleKeyInfo();
MccDaq.ErrorInfo RetVal;
int BoardNum = 0;
int DeviceChannels = 0;
int Rate = FREQ;
bool ReadLower = true;
BoardNum = GetBoardNum(DEVICE);
if (BoardNum == -1)
{
Console.WriteLine("No USB-{0} detected!", DEVICE);
cki = Console.ReadKey();
}
else
{
MccBoard daq = new MccDaq.MccBoard(BoardNum);
daq.BoardConfig.GetNumAdChans(out DeviceChannels);
if (DeviceChannels > 8)
{
Console.WriteLine("Single-Ended Channels");
}
else
{
Console.WriteLine("Differentially-Ended Channels");
}
IntPtr buffer = MccService.ScaledWinBufAllocEx(BUFFERSIZE);
if (buffer == IntPtr.Zero)
{
Console.WriteLine("Bad Handle");
return;
}
short[] chArray = new short[CHANCOUNT]; //configuration array for channel numbers
Range[] chRange = new Range[CHANCOUNT]; //configuration array for input ranges
chArray[0] = 0;
chArray[1] = 1;
chArray[2] = 2;
chArray[3] = 3;
chRange[0] = Range.Bip10Volts;
chRange[1] = Range.Bip10Volts;
chRange[2] = Range.Bip10Volts;
chRange[3] = Range.Bip10Volts;
RetVal = daq.ALoadQueue(chArray, chRange, CHANCOUNT);
IsError(RetVal);
//setup the acquisiton
RetVal = daq.AInScan(FIRSTCHANNEL,
LASTCHANNEL,
BUFFERSIZE,
ref Rate,
Range.Bip10Volts,
buffer,
ScanOptions.Background | ScanOptions.ScaleData | ScanOptions.Continuous
);
IsError(RetVal);
fStream = new StreamWriter(@"C:\Users\Public\Documents\DataFile1608G.asc");
CreateFileHeaders(chArray); //writes basic info to the beginning of the file
int Count = 0;
int Index = 0;
short daqStatus;
double[] theArray = new double[BUFFERSIZE];
//Loop until key press
do
{
RetVal = daq.GetStatus(out daqStatus, out Count, out Index, FunctionType.AiFunction);
if ((Index >= HALFBUFFSIZE) & ReadLower) //check for 50% more data
{
//get lower half of buffer - ScaledWinBufToArray returns engineering units
RetVal = MccService.ScaledWinBufToArray(buffer, theArray, 0, HALFBUFFSIZE);
IsError(RetVal);
DisplayData(theArray, HALFBUFFSIZE / CHANCOUNT);
ReadLower = false; //flag that controls the next read
}
else if ((Index < HALFBUFFSIZE) & !ReadLower)
{
//get the upper half - ScaledWinBufToArray returns engineering units
RetVal = MccService.ScaledWinBufToArray(buffer, theArray, HALFBUFFSIZE, HALFBUFFSIZE);
IsError(RetVal);
DisplayData(theArray, HALFBUFFSIZE / CHANCOUNT);
ReadLower = true;//flag that controls the next read
}
} while (!Console.KeyAvailable);
cki = Console.ReadKey();
//flush any buffered data out to disk
fStream.Close();
//stop the acquisition
RetVal = daq.StopBackground(FunctionType.AiFunction);
//free up memory
MccService.WinBufFreeEx(buffer);
WaitForKey();
}
}
