Thread: Defective Black Jaguars?
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Unread 14-02-2011, 10:35
dyanoshak dyanoshak is offline
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AKA: David Yanoshak
FRC #2158 (ausTIN CANs)
Team Role: Mentor
  
Join Date: Dec 2007
Rookie Year: 2007
Location: Austin, TX
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Re: Defective Black Jaguars?
Make sure your cables are correct. Patchy connectivity throughout the bus is a symptom of cables that aren't crimped pin 1 -> pin 1, pin 2 -> pin 2, etc.

To find a bad cable, try connecting each Jaguar one at a time. Start with your first Black Jag as the serial-to-CAN bridge and one additional Jaguar (Black or Grey). Make sure they each have unique IDs (not the same ID for both of them). Test all your cables between these two Jags to eliminate the bad ones.

The BDC-COMM application will help in these tests, so that you don't have to run code on your robot. With each cable, test that you can control the second Jaguar (for example, change the voltage).

Now that you have checked all your cables, keep the two Jag setup, but now switch out the second Jag with another from your supply. Using BDC-COMM, make sure it is updated to version 92 firmware, and has a unique ID. In this manner, check all your Jaguars one at a time.

If you have even one set of duplicate IDs on the network, things stop working.

-David
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