Chief Delphi - Problem sending messages to Driver Station LCD

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- - Problem sending messages to Driver Station LCD (http://www.chiefdelphi.com/forums/showthread.php?t=89120)

wdell

14-01-2011 14:24

Problem sending messages to Driver Station LCD

Every time I try to send a message to the LCD I get a NullPointerException, no matter what I try or who's code I copy. If it hits the line

Code:

DriverStationLCD.getInstance().println(DriverStationLCD.Line.kMain6, 1, msg);

it throws an exception. What am I doing wrong?

Thanks!

ArchVince

14-01-2011 18:05

Re: Problem sending messages to Driver Station LCD

Ah, the LCD. I'm pretty sure that you just forgot an import.
Did you import BOTH of these?

PHP Code:


		
			
import edu.wpi.first.wpilibj.DriverStationLCD;
import edu.wpi.first.wpilibj.DriverStationLCD.Line;

If so...In my code I always use

PHP Code:


		
			
Line.kUser6

instead of

PHP Code:


		
			
DriverStationLCD.Line.kUser6

but that probably wouldn't make a difference.
Also, make sure you update the LCD. You won't see any output otherwise.

rrossbach

14-01-2011 19:16

Re: Problem sending messages to Driver Station LCD

Quote:

Originally Posted by wdell (Post 1000021)

Every time I try to send a message to the LCD I get a NullPointerException, no matter what I try or who's code I copy. If it hits the line

Code:

DriverStationLCD.getInstance().println(DriverStationLCD.Line.kMain6, 1, msg);

it throws an exception. What am I doing wrong?

Thanks!

Please post the exception you're getting (including the stack trace) and we can try to help

- Ron
Team #2607 controls mentor

wdell

15-01-2011 11:46

Re: Problem sending messages to Driver Station LCD

ArchVince's suggestion seems to have worked. Weird, since I'm pretty sure I tried that once. Must have had the syntax wrong.

Thanks for all the help!

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