Child function problems

[Ben Wolsieffer]

Originally Posted by DrOmni9885

In other words there's no way I can write a child function that dictates the movement of motors? That's... to bad I guess. I'll see what I can do. Thanks for your help.

You can, but you just can't create the motor controller within that function. You need to create it when the robot starts, but then you can set its speed in the function.

[DrOmni9885]

Originally Posted by lopsided98

You can, but you just can't create the motor controller within that function. You need to create it when the robot starts, but then you can set its speed in the function.

Will this work

	int motorAutomationEncoder(double encoderDist,
							   double encoderDistThresholdMax,
							   double encoderDistThresholdMin,
							   CANTalon motor,
							   double motorSpeed)


	{
		if(encoderDist > encoderDistThresholdMax) {
			motor.Set(0.0);
		}
		else if(encoderDist <= encoderDistThresholdMax && encoderDist >= encoderDistThresholdMin) {
			motor.Set(motorSpeed);
		}
		else if(encoderDist < encoderDistThresholdMin) {
			motor.Set(0.0);
		}
	}

As aforementioned, the start-stop loop seems to have disappeared.

[bob.wolff68]

If you want to use your CANTalon object, you should pass it as a pointer .

CANTalon *pMySpeedController
...
pMySpeedController->Set(x);
...

[DrOmni9885]

Originally Posted by bob.wolff68

If you want to use your CANTalon object, you should pass it as a pointer .

CANTalon *pMySpeedController
...
pMySpeedController->Set(x);
...

This is weird, but whenever I try deploying the code Eclipse tells me there's nothing to build for any project after I added the pointer. Here's the information from the console:

Info: Nothing to build for Encoder
Info: Nothing to build for Intermediate Vision
Info: Nothing to build for Mecanum Drive
Info: Nothing to build for Motor Control With Encoder
Info: Nothing to build for PDP CAN Monitoring
Info: Nothing to build for Simple Vision
Info: Nothing to build for Solenoids
Info: Nothing to build for [FRC2015_MAINCODE]
Info: Nothing to build for cases code
Info: Nothing to build for example

The project I'm trying to build is [FRC2015_MAINCODE]. Here's the portion of the code which I've changed:

Main program

...
	CANTalon *fan_motor_SRX;
...
	motorAutomationEncoder(e_encoder_dist, 300, -100, fan_motor_SRX, 1.0);
...
START_ROBOT_CLASS(Robot);

Header file (function):

	int motorAutomationEncoder(double encoderDist,
							   double encoderDistThresholdMax,
							   double encoderDistThresholdMin,
							   CANTalon *motor,
							   double motorSpeed)


	{
		if(encoderDist > encoderDistThresholdMax) {
			motor->Set(0.0);
		}
		else if(encoderDist <= encoderDistThresholdMax && encoderDist >= encoderDistThresholdMin) {
			motor->Set(motorSpeed);
		}
		else if(encoderDist < encoderDistThresholdMin) {
			motor->Set(0.0);
		}
	}

All other projects work when I try to deploy them. What could be wrong here?...

[bob.wolff68]

A couple thoughts...

I teach my students to right-click on the project they want to build (in the left pane) and select "Build Project" ... this way there's no question what was being asked of Eclipse.

I would suggest doing the following to help further diagnose if the above doesn't help (which it probably wont since its really just general)...
- Right click on the project and select 'clean project'
- Verify it's clean by opening up the 'Debug' folder in eclipse for that project and you should NOT see FRCUserProgram which is the final binary output file that gets sent to the roborRIO
- Click on the 'problems' tab in the lower / console area at the bottom of Eclipse.
- Right click on 'Errors' and select 'Delete' - and confirm.
- Right click on 'Warnings' and select 'Delete' - and confirm.
- Confirm there is nothing in the 'problems' tab any longer. This is a bit painful but will make sure you're only looking at NEW problems and not old ones.
- Now right click on the project again and select 'Build Project' ...

After it completes, look in the 'problems' tab for errors and warnings.
- If there are errors/warnings - post them here.
- If there are no errors, take a look again in the Debug folder in the project (left pane) and see if there is a FRCUserProgram (this would indicate a successful compile)
- If there is indeed an FRCUserProgram, then you should be good to right click on the project and select RunAs->WPILibC++Deploy

If you got to the deploy - then check in the lower area for a 'Console' tab which will have the results of the deploy operation.

Once this works well, it shouldn't be so painful as described above. I'm just trying to eliminate any variables I can so that the next step of troubleshooting becomes illuminating of the root cause. Hopefully.

bob