Hello everyone,
i am using a cDAQ System with two analog input modules and one digital input modul in combination with Visual Studio 2005 and .net 2.0. My application simply waits for a trigger event on ch0 of the digital modul and writes the data of the analog channels to a textfile.
My program is based on the two examples:
- "ReadDigChan_ChangeDetection" with myTask.Stream.Timeout = -1;
- "ContAcqVoltageSamples_IntClk"
and works fine so far.
In case of a communication problem i dispose both tasks (analog and digital) - just like in the examples - and reinitialize them. I tested the reinitialization procedure by disconnection the usb cable and in most of the cases the system reinitializes as expected. However, sometimes when disconnecting the usb cable a BlueScreen event occurs and the computer reboots.
This is how the reinitialization is basically done:
if (runningAnalogTask != null)
{
runningAnalogTask = null;
analogTask.Dispose();
}
if (runningDigTriggerTask != null)
{
runningDigTriggerTask = null;
digTriggerTask.Control(TaskAction.Abort);
digTriggerTask.Dispose();
}
initAnalogMeasurement();
initTriggerInput();
Is this a known bug and is there a solution for this problem or does anybody else have simillar issues?
Here my system configuration:
- cDAQ 9174 with
- 2 NI 9222 Analog input modules and
- 1 NI 9421 Digital Input modul
- sampling rate is 125000 samples/s
- Windows7 64Bit
- NI-DAQ MX 9.6.1
