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Unread 04-02-2017, 10:30
slibert slibert is offline
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Re: Nav-X error - Cant get readings

Quote:
Originally Posted by rcdturtle View Post
We are also experiencing CRC errors when connecting to the SPI port on the RoboRio, via an approximately 30 inch long cable. The NavX initially started to give us heading readings then cut out, yet the green LED lights are still on. Any thoughts on what we're missing?
30 inches is on the outside of nominal for the 2Mhz SPI signal. CRC errors are likely in this configuration.

If you need to have a cable that long, USB is a great choice. The cable is shielded, differential signaling is used, etc. And it has the benefit of providing power even in a stage 2 roborio brownout.

More discussion here: http://www.pdocs.kauailabs.com/navx-...-an-interface/
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