Thread: ANNOUNCING: navX MXP Robotics Navigation Sensor
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Unread 17-02-2015, 12:01
slibert slibert is offline
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Re: ANNOUNCING: navX MXP Robotics Navigation Sensor
Quote:
Originally Posted by Thad House View Post
We were able to successfully reproduce the issue. A very fast brownout was able to. If it was longer then about 20 ms it didnt happen, but shorter then that and it did.
Fascinating. Congratulations on some nice sleuthing...

Our LabView SPI longevity test has run 16 hours now w/no problems - glad there's an edge case identified we can chase down.

Using the RoboRio Brownout and Understanding Current Draw article as a reference, there are three stages of RoboRio brownout. Do you know which stage was reached in the case you've reproduced? It'd be interesting to know if Stage 2 (which would remove the power from the MXP 5V rail) was hit or not.

Also, could you please post the driver station logs that document the case when this occurs? That should help clarify the details of the scenario. The goal is to try to reproduce this behavior with a benchtop power supply, so the more info on the dynamics, the better. Once reproduced, we can run through various configurations and characterize the behavior more thoroughly.
Last edited by slibert : 17-02-2015 at 12:03.
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