View unanswered posts | View active topics It is currently Tue Sep 30, 2014 10:49 am






Reply to topic  [ 4 posts ] 
Communication loss between Cortex and Joystick 
Author Message
Rookie

Joined: Tue Nov 29, 2011 1:34 pm
Posts: 8
Post Communication loss between Cortex and Joystick
I am experiencing a loss of communication between the Joystick and Cortex at random times. What can I do to prevent this?


Tue Oct 23, 2012 12:48 pm
Profile
Moderator
Moderator
User avatar

Joined: Tue Sep 14, 2010 9:19 pm
Posts: 496
Post Re: Communication loss between Cortex and Joystick
Can you be a little more specific about what you men by communication loss? Does the connection actually drop out and reset, or does the robot just not respond to specific joystick input for a short time? I only ask to make sure that it's hardware based, and not something in the code that makes it seem like you're experiencing communication loss. If it's hardware based, make sure that your key isn't enclosed by metal on your robot. Try placing it up and out of the way so it has clear range. For the VEX competition, it is legal to use a small USB extension to mount your key somewhere other than directly in the Cortex slot. It is also possible that you have a bad key (they're not known for their reliability). Try swapping them out with different keys and see if the problem persists.

_________________
sudo rm -rf /


Tue Oct 23, 2012 1:43 pm
Profile
Rookie

Joined: Tue Nov 29, 2011 1:34 pm
Posts: 8
Post Re: Communication loss between Cortex and Joystick
I think its hardware. The USB keys could be disconnecting through movement. I will try the extension. For competitions, can any type of extension be used or does it have to be VEX?


Wed Oct 24, 2012 1:00 pm
Profile
Moderator
Moderator
User avatar

Joined: Tue Sep 14, 2010 9:19 pm
Posts: 496
Post Re: Communication loss between Cortex and Joystick
You can use any USB extension cable as long as it's sole purpose is the remote mounting of the key. Here's an except from the Sack Attack manual:
Code:
<R7>
j. A USB extension cable may be used for the sole purpose of remote mounting of a VEXnet key. The key must be mounted in the following manner.
  i. The VEXnet key must be mounted such that no metal is touching the key above the VEXnet logo.
  ii. No metal may be within 2” of the top of the VEXnet key.

_________________
sudo rm -rf /


Wed Oct 24, 2012 2:38 pm
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 4 posts ] 

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  



Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by ST Software for PTF.