Go to Post Chief Delphi down for a few hours ON A WEEKEND??? This is MADNESS! - [more]
Home
Go Back   Chief Delphi > Technical > Programming > Java
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #1   Spotlight this post!  
Unread 04-04-2014, 21:30
NWChen's Avatar
NWChen NWChen is offline
Alum
no team
 
Join Date: Oct 2012
Rookie Year: 2012
Location: New York City
Posts: 205
NWChen is a splendid one to beholdNWChen is a splendid one to beholdNWChen is a splendid one to beholdNWChen is a splendid one to beholdNWChen is a splendid one to beholdNWChen is a splendid one to beholdNWChen is a splendid one to behold
Dual Ultrasonic error

Our robot has two VEX ultrasonic rangefinders, each connected to separate DIO ports on the digital sidecar. We're using the command-based template.

In a subsystem they're declared as:
Code:
private Ultrasonic wallSonar, ballSonar;
and in the constructor of the subsystem,
Code:
ballSonar = new Ultrasonic(Map.ARM_SONAR_INPUT, Map.ARM_SONAR_OUTPUT);
ballSonar.setEnabled(true);
ballSonar.setAutomaticMode(true);
wallSonar = new Ultrasonic(Map.LAUNCHER_SONAR_INPUT, Map.LAUNCHER_SONAR_OUTPUT);
wallSonar.setEnabled(true);
wallSonar.setAutomaticMode(true);
Ultrasonic.java in WPILib appears to be designed to handle >1 Ultrasonic instance, but when we try to run this code it throws an IllegalThreadStateException.

Things we tried so far:
- Changing the order of assignment (wallSonar before ballSonar, ballSonar before wallSonar); still throws IllegalThreadStateException
- Moving one of the Ultrasonic sensors to a different subsystem; still throws IllegalThreadStateException.
- Declaring only one of the Ultrasonic sensors; having only one Ultrasonic sensor throws no errors, and the sensor works as expected.
- Unit testing with SimpleRobot, like this. Both sensors worked as expected, with no errors thrown.

Any idea why we can't declare/use two Ultrasonic sensors?

Thanks to Jeanne Boyarsky from team 694 at NYC today for helping us try to fix this.
__________________
2012 - 2015 • Team 2601


Last edited by NWChen : 04-04-2014 at 21:48.
Reply With Quote
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 08:45.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi