Thread: Very odd Spike behavior
View Single Post
  #1   Spotlight this post!  
Unread 07-02-2014, 10:02
JamesCH95's Avatar
JamesCH95 JamesCH95 is offline
Hardcore Dork
AKA: JCH
FRC #0095 (The Grasshoppers)
Team Role: Engineer
  
Join Date: Dec 2004
Rookie Year: 2001
Location: Enfield, NH
Posts: 1,832
JamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond reputeJamesCH95 has a reputation beyond repute
Very odd Spike behavior
While doing a functionality check and debug we ran into an issue that has all of our students and mentors stumped.

We trigger a relay output in code, the state light turns green on the DSC, and the spike momentarily blips "forward", but then the state light on the spike just goes off. Not orange, not green, not red, just off, and there's no output from the spike.

The problem doesn't seem to follow any specific DSC output (tried 2), pwm cables (tried 2), or code. It sort of seems to follow spikes, namely old ones work (sometimes, but we only have 1) and new ones never work (tried 3).

Clear as mud I'm sure.

Anyone run into this type of issue before? Any advice on where to look next? We're really not used to debugging spike issues... they have always been dead-nuts-reliable for us in the past.
__________________
Theory is a nice place, I'd like to go there one day, I hear everything works there.

Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.