Unable to read accelerometer

[wireties]

Originally Posted by StephenNutt

Thank you for verifying the accelerometer works on the 8-slot cRIO. We've successfully used the accelerometer at address 0x3A with an Arduino so that does not appear to be our issue.

Ours is also an 8-slot setup.

How long is your cable? I mean total length from cRIO to sidecar plus from sidecar to accelerometer. Our cable to the accelerometer is quite short, maybe that is the difference? I know I2C is designed to work over very short distances, it is more often used on the same circuit board or across a backplane. There are dedicated I2C drivers that work well over a couple meter long cable but more often the driver is really just some sort of logic port on a FPGA or a I2C peripheral and not as strong as the I2C spec recommends.


HTH