Measurement-computing DAQFlex User Guide Manuel d'utilisateur télécharger pdf (Page 19)

DAQFlex Software User's Guide Using DAQFlex Software

' Stop the counter

MyDevice.SendMessage("CTR{0}:STOP")

Catch Ex As Exception

' handle error

Label1.Text = Ex.Message

End Try

Reading hardware-paced I/O

The basic approach to programming analog input scans is to set the device's scan properties, send the

START command, and call the ReadScanData() method. The following examples show how to program a

basic input scan.

try

{

double[,] scanData;

string[] names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);

DaqDevice device = DaqDeviceManager.CreateDevice(names[0]);

device.SendMessage("AISCAN:LOWCHAN=0");

device.SendMessage("AISCAN:HIGHCHAN=0");

device.SendMessage("AISCAN:RATE=1000");

device.SendMessage("AISCAN:SAMPLES=5000");

device.SendMessage("AISCAN:START");

scanData = device.ReadScanData(5000, 0);

}

catch (Exception ex)

{

Console.WriteLine(ex.Message);

}

Try

Dim ScanData As Double(,)

Dim Names As String()

Dim Device As DaqDevice

Names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)

Device = DaqDeviceManager.CreateDevice(Names(0))

Device.SendMessage("AISCAN:LOWCHAN=0")

Device.SendMessage("AISCAN:HIGHCHAN=0")

Device.SendMessage("AISCAN:RATE=1000")

Device.SendMessage("AISCAN:SAMPLES=5000")

Device.SendMessage("AISCAN:START")

ScanData = Device.ReadScanData(5000, 0)

Catch ex As Exception

Console.WriteLine(ex.Message)

End Try

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Measurement-computing DAQFlex User Guide Manuel d'utilisateur Page 19