Synchronizing mouse events and DAQ data

[hfettig]

I have an application that requires me to record mouse events (xy location vs time) and synchronize that with DAQ data that is acquired in parallel.

I get the mouse events with the system tick counter as a time base and the DAQ data with the system timestamp as a time base.

To synchronize the two I am calling the GetTickCount and the GetDateTime functions in a sequence frame and use those values as the reference points for my relative time base.

Does that make sense? Is there an easier way?

We are seeing a 500ms delay between DAQ and mouse data and have no idea where it comes from.

[Yair]

Can you upload the code?

One point is that on XP the resolution of the timestamp is ~16 ms, but that should not account for the 500 ms difference you see.

[COsiecki]

I don't know how your program is set up, but I would use a DAQ event for timing and then read the mouse position when the event fires. See my attached VI.

I have an application that requires me to record mouse events (xy location vs time) and synchronize that with DAQ data that is acquired in parallel.

I get the mouse events with the system tick counter as a time base and the DAQ data with the system timestamp as a time base.

To synchronize the two I am calling the GetTickCount and the GetDateTime functions in a sequence frame and use those values as the reference points for my relative time base.

Does that make sense? Is there an easier way?

We are seeing a 500ms delay between DAQ and mouse data and have no idea where it comes from.

Read Mouse.vi