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Unread 08-03-2011, 11:36
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Phalanx Phalanx is offline
Formerly Team 1089 (Mercury)
AKA: Michael Reffler
FRC #5431 (Titan Robotics)
Team Role: Mentor
 
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Rookie Year: 1999
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Re: Unexplained intermittent CAN / 2CAN Jaguar problems at GSR

Quote:
Originally Posted by WizenedEE View Post
Source Please?
http://www.usfirst.org/uploadedFiles...%20%281%29.pdf

I also remember reading it somewhere else, like FIRST Forums, or a Team Update, but I can't remember exactly where. If/when I find/remember I'll update this.

Quote:
Originally Posted by WizenedEE View Post
<R39> F. Custom circuits and sensors powered via the cRIO-FRC or the Digital Sidecar are protected by the breaker on the circuit(s) supplying those devices. Power feeds to all other custom circuits must be protected with a dedicated 20-amp circuit breaker on the PD Board.
I guess I'll need to move the power from direct to the PD on a 20amp.

Quote:
Originally Posted by Andy A. View Post
We used all black jags and the serial port.
The last I had heard was that a common factor in all this was that the team was using Java as their programming language. Beyond that, there didn't seem to be any commonality. I heard some accusations of it only occurring on one driver station, or side of the field, but I can't confirm if that was true or not.
We are using Labview

We intentionally chose to not use the serial interface for the following reasons:
128Kbps transfer rate over serial versus 1MB transfer rate using 2CAN. (CAN is typically a 1MB network)
I also noticed that under heavy processing load the serial interface on the CRIO would lag, or appear to garble some data, etc.. So we opted to avoid that potential pitfall.
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Last edited by Phalanx : 08-03-2011 at 11:54.
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