Go to Post Big Mike (i'm not big you are all just short ;) ) - Mike Schroeder [more]
Home
Go Back   Chief Delphi > Technical > Programming
CD-Events   CD-Media   CD-Spy   FRC-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 01-25-2008, 05:37 AM
ChrisR_522's Avatar
ChrisR_522 ChrisR_522 is offline
Registered User
FRC #0522 (Robo Wizards)
 
Join Date: Apr 2006
Rookie Year: 2005
Location: Staten Island, New York
Posts: 20
ChrisR_522 is an unknown quantity at this point
Send a message via AIM to ChrisR_522 Send a message via MSN to ChrisR_522
Limit Switches

How can we go about thoroughly programming the limit switches to control a specific motor using MPLab,
ex: if ((dig_in03)) { pwm03 = p3_y; } else { pwm03 = 127; }
Is that the correct way?

Any help would be greatly appreciated, Thanks!
__________________
http://robowizards.com/
http://img.photobucket.com/albums/v83/DAL_762/robowizards522animation.gif?t=1168394300
  #2   Spotlight this post!  
Unread 01-25-2008, 06:10 AM
Roger Roger is offline
Registered User
FRC #1153
 
Join Date: Jan 2006
Rookie Year: 1900
Location: Walpole MA
Posts: 601
Roger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond reputeRoger has a reputation beyond repute
Re: Limit Switches

You're up a bit late, aren't cha? (Or early? Do programmers ever get to see the sun?)

I think it's rc_dig_in03.

Here's some code we had from last year, using joystick 2 y-axis to move the grabber arm up or down (like your lower arm with the motor at the elbow). We had a limit switch (LS) at the top and bottom to stop the motor, but allows it to go the other way even if it reaches the limit switch.
Code:
   //-------------------------- ARM WORK 3 -------------------------------------
   //Arm desired direction is from JoyStick2, Y-axis. UP goes fwd, DOWN is back.
   //pwm05 is the motor. LimitSwitch 5 and 7 is fwd and back stop points.
   //Change pwm numbers of motor, LS, and Joystick as need be.
   if (p2_y >(127+50))                          //If Joystk2 Y pushed up - arm forward
      {
      if (rc_dig_in05 == 0)                     //is LS5 not pressed?
         { pwm05= 127+3; }                     //  No- turn motor on!
      else
         { pwm05= 127; }                        // Yes- turn motor off!
      }
   else if (p2_y < (127-50))                    //If Joystk2 Y pulled back - arm backwrd 
      {
      if (rc_dig_in07 == 0)                     //is LS7 not pressed?
         { pwm05= 127-3; }                     //  No- turn motor on!
      else
         { pwm05= 127; }                        // Yes- turn motor off!
      }
   else
      { pwm05= 127; }                           //Turn motor off
Of course if you're doing autonomous, don't use the joystick! Just remember to cover all possibilities (all if/ifelse/else's) so you know at the end the motors are on or off.

This wasn't our final code, but it did work at the time. As always YMMV.
______________________
One of the main causes of the fall of the Roman Empire was that, lacking zero, they had no way to indicate successful termination of their C programs.
  #3   Spotlight this post!  
Unread 01-25-2008, 07:04 AM
ChrisR_522's Avatar
ChrisR_522 ChrisR_522 is offline
Registered User
FRC #0522 (Robo Wizards)
 
Join Date: Apr 2006
Rookie Year: 2005
Location: Staten Island, New York
Posts: 20
ChrisR_522 is an unknown quantity at this point
Send a message via AIM to ChrisR_522 Send a message via MSN to ChrisR_522
Re: Limit Switches

Hey, thank you so much! It worked!
__________________
http://robowizards.com/
http://img.photobucket.com/albums/v83/DAL_762/robowizards522animation.gif?t=1168394300
Closed Thread


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Alternative to limit switches? RbtGal1351 Electrical 27 12-10-2005 02:30 PM
limit switches stephenthe1 Programming 28 05-11-2005 03:37 PM
Limit Switches help. Xufer Programming 9 04-21-2004 08:21 PM
Limit switches Team168 Programming 8 02-10-2003 03:22 PM
Limit Switches/Pots Brett W Technical Discussion 3 01-28-2003 01:25 PM


All times are GMT -5. The time now is 10:46 AM.

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


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi