USB 8451: Is the timeout controllable when doing a I2CREAD I2CWRITE?

[ShortCircuitPain]

Sorry if this isn't in the correct board.

I am using the NI USB-8451 to do I2C communication to talk to multiple devices.  I would like to put some functionality into my program to build up a list of devices that are connected on the bus.  It will attempt to communicate all 112 available addresses.  I tried testing this out by connecting the  USB-8451 to no device and communicating to address 10. It took about 5 seconds for the USB-8451 to timeout.  So it would take a lengthy amount of time to do this to all 112 address.  So my questions are:

Is there a way to shorten the length of the timeout?

Is there a better way of doing this?

[TV_Enable]

Hi,

Unfortunately, this functionality is not currently available with our I2C driver.  I have already put in a product suggestion for this.  If you would also like to do this, I would encourage you to visit our Product Suggestion Center.  I'm sorry that this isn't possible, but I can assure you that all product suggestions are seriously considered.  Have a great day!

Regards,

Todd V. 

[O_Proulx · Accepted solution]

Hello,

Although the timeout value is not adjustable, I was able to query all 112 address using the script API pretty rapidly.  Here is the VI I used.  Let me know if it helps.

Have a great day!

Message Edited by O_Proulx on 11-05-2008 01:12 PM

[TV_Enable]

Hi,

I have attached another VI that should help you.  Please let me know how this VI works for you.  Have a great day!

Regards,

Todd V. 

[TV_Enable]

Hi,

I apologize for the duplicate post.  The VI I attached is the same one that was previously attached.  I worked together with the Applications Engineer that posted the VI, and we both posted it.  I apologize again.

Thanks,

Todd V. 

[ShortCircuitPain]

Thank you for your suggestions!  I'll try them out.