potentiometer/ analog inputs
 

We are having trouble getting our potentiometer code to work.

we declare it
AnalogInput *potemtiometer;


later
potentiometer = new AnalogInput(2);

and we can't figure out the last part. We don't have anything to go off of because last year was an easy 1,2,3 robot.

Re: potentiometer/ analog inputs
 

try using AnalogChannel instead of input

Re: potentiometer/ analog inputs
 

okay we'll try that.

Re: potentiometer/ analog inputs
 

attempting analog channel didn't work when we added

float anglesh = pot1.GetVoltage();

Re: potentiometer/ analog inputs
 

shouldn't it be pot1->GetVoltage();?

Re: potentiometer/ analog inputs
 

i'm trying to make the code right and it compiles but we'll see if i get something.

i haven't actually had a potentiometer until now.

Re: potentiometer/ analog inputs
 

1075guy is right, because you declared it using a pointer you must use -> instead of .

Re: potentiometer/ analog inputs
 

use pot1->GetValue() for a 0-1023 range value, pot1->GetVoltage() for 0.0-5.0 range. Try both and see which one you like better

Re: potentiometer/ analog inputs
 

i try printing the values to the screen and i get really big values sometimes. Why would this be? is it because i might run the loops they are in too quuickly. i set them to .02 seconds and i think its doing better.

I actually disabled the watchdog for the autonomous because it won't run through long waits in the system. this worked until just now when it started giving me watchdog not fed errors that have never happened before.

Re: potentiometer/ analog inputs
 

Perhaps there's a digit or two left over on the screen from a previous print step? For example, if one value is 1003 and the next one is 996, it might end up on screen looking like 9963 if you aren't careful.

Re: potentiometer/ analog inputs
 

this could be i will try to fix this.
would printing

printf(" =angletop");
printf("%d",angletop);

would this work in the correct format assuming it prints on line 1 and the %d writes over it?

Re: potentiometer/ analog inputs
 

no, this will output something like this:i would recommend one printf a loop (if possible): printf("angletop=%d\r\n",angletop);

Re: potentiometer/ analog inputs
 

we only need the number to print when autonomous is done. basically we have a 5 second waiting period where we find the values.

right now i just found out that the pot is mounted so up is down and down is up. so i'll need to get someone to remount it.

Re: potentiometer/ analog inputs
 

Or you can correct it in software.