Chief Delphi - problem while programming 2 bottuns in windriver

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problem while programming 2 bottuns in windriver

hey
we are trying to do 2 buttons for the same motor if button 1 pressed move forward .. else stop ... and then if button 2 pressed move backward else stop
here is the code we are using but it doesn't work well :

in the operatorcontrol we put this:

Code:

if(leftjoystick->GetRawButton(1));

{

jaguar->Set(1.0);

}

else{

jaguar->Set(0.0);

}

 

if(leftjoystick->GetRawButton(2));

{

jaguar->Set(-1.0);

}

else{

jaguar->Set(0.0);

}

what is the problem with this ?? if we deleted the second part

Code:

if(leftjoystick->GetRawButton(2));

{

jaguar->Set(-1.0);

}

else{

jaguar->Set(0.0);

}

everything working ok!!

please need answer

Re: problem while programming 2 bottuns in windriver

Its a logic error, if you hold down button 1, then that will set the motor to 1, then since button 2 is not held down it will go to that else which will set it back to 0.

Re: problem while programming 2 bottuns in windriver

Because you have two separate if...else statements, if the reverse button isn't held down, the output will be zero regardless of the forward button's state.

Also, this:

Code:

if (condition);

has no code to execute because of that trailing semicolon. An "if" will execute the statement immediately after it up until a semicolon, or if you put the code inside {curly braces}, it will execute everything in the first set of braces. If statements don't need any additional semicolons.

A quick rewrite yields this:

Code:

if(leftjoystick->GetRawButton(1))

{

jaguar->Set(1.0);

}

else if (leftjoystick->GetRawButton(2)) {

jaguar->Set(-1.0);

} else {

jaguar->Set(0.0);

}

That will work.

Alan Anderson let me know that I messed up. I misread your code snippet: I didn't realize that the reverse button would drive the motor in reverse... (crosses eyes) I really need some more sleep.

Let me know if you have any more questions or problems.

Jacob

Re: problem while programming 2 bottuns in windriver

thank you :D it works well .... if i have any questions i will ask here