How to control I2C bus with a DAQ

[eythor]

I have timing problems with NI-DAQ harware and sometimes i can control the bus. If the PC that is running the Labview 6.0 is doing som other work the timing does go out of sync on the digital I/O NI-DAQ harware. Has someone made a programm to control I2C bus with standard digital I/O card or DAQ from made by NI.

[Ben]

No I have not done I2C with DAQ.

In a Windows environment, you will not be able to enusre that you will be able to react deterministically to bus events.

I wrote a wrapper to use a PCI interface for I2C a couple of years ago. It worked good.

Since then I have read that others have gotten good results using a serial to I2C adapter.

I would suggest that approach. Otherwise, the approach you are taking may become an "exercise in futility".

Ben