USB-8451

Hello

I am trying to contact a gyroscope using NI USB-8451, I used the example of "General I2c Read.vi" trying to communicate with the device but I get different errors each time that I run the program, I used the gyroscope with my Arduino board and it works perfectly, attached, I the datasheet and sample Arduino code of the gyroscope. Any help would be greatly appreciated.

4K should be good. For moderate transfer speeds you can probably get with somewhere between 3 k - 10 k. I think I use 4.7 k often because I have, but it's really not too picky. The Arduino (I think) has a few weak pull-up (20 k - 40 k?), which probably explains why you had some communication, but I'd be surprised if it was robust as the waves will probably not be very pretty.

This has some pretty good photos of different traction I2C and the effect on the wave form: http://dsscircuits.com/articles/effects-of-varying-i2c-pull-up-resistors.html

Tags: NI Software

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