error codes makes no sense for me

Projects Programming
1

Hey boys, I have a little problem, I'm about to get a stepper motor to drive,
but the compilation of the program failed :confused:
I've tried different codes but with the same result
although the example is with the library Steppers, Knop.ino fails
comes with the following error messages:

knop.cpp.o: In function _GLOBAL__sub_I_MYstepper ': /usr/share/arduino/knop.ino:21: undefined reference two Stepper :: setspeed (long) '
/usr/share/arduino/knop.ino:21: undefined reference two Stepper :: step (int) ' /usr/share/arduino/knop.ino:21: undefined reference two Stepper :: Stepper (int, int, int, int, int) '
collect2: error: ld returneres 1 exit status

I use Linux, do not know if it had anything to say, have not before experienced problems

2

Sigh...
Please post an example of a full program that exhibits the problem.

Where is the stepper motor library folder installed ?

3

/*

  • MotorKnob
  • A stepper motor follows the turns of a potentiometer
  • (or other sensor) on analog input 0.
  • Stepper - Arduino Reference
  • This example code is in the public domain.
    */
    #include </usr/share/arduino/libraries/Stepper/Stepper.h>

// change this to the number of steps on your motor
#define STEPS 200

// create an instance of the stepper class, specifying
// the number of steps of the motor and the pins it's
// attached to

Stepper MYstepper(STEPS, 8, 9, 10, 11);

// the previous reading from the analog input
int previous = 0;

void setup()
{
// set the speed of the motor to 30 RPMs
MYstepper.setSpeed(30);
}

void loop()
{
// get the sensor value
int val = analogRead(0);

// move a number of steps equal to the change in the
// sensor reading
MYstepper.step(val - previous);

// remember the previous value of the sensor
previous = val;
}

and stepper.h and stepper.cpp installed in /usr/share/Arduino/libraries/Stepper/

4

Try either #include<Stepper.h> or #include "/usr/share/arduino/libraries/Stepper/Stepper.h"

I can't remember if the first version should have a capital S, but it would be easy to try both

...R

5

everything is spelled correctly and there are large and small lettering grouped together where they should be.
Have tried to change uppercase to lowercase.

6

The line that says

#include </usr/share/arduino/libraries/Stepper/Stepper.h>

Should say

#include <Stepper.h>

Then it will compile. Tested under 1.0.6.

7

I have to have the full path, otherwise I get error

fatal error: Stepper.h: Ingen sådan fil eller filkatalog

8

Using Linux should the path not be Documents/Arduino/libraries/Stepper/Stepper.h ?
Then you can use #include <Stepper.h>

This page would perhaps be worth reading Installing additional Arduino libraries

9

It does not matter where I lie libraries, just the path is correct,
has put more libraries in /usr/share/Arduino/libraries/...
without that it has created problems
I think that there is somewhere that needs to be made a small correction, but where is it ???

10

Do you have a Documents/Arduino/libraries/ directory ?

11

no !!
it is not the location that is the problem,
if it was, I got a different error message,
the problem is the way Steppers are inherited, or whatever it's called !

12

The problem is solved :slight_smile:

Tried to place Stepper.cpp & stepper.hi same directory as knop.ino and then it works !!!!!
why I can not answer !!
I am happy :slight_smile:
Hope others can get a little joy of my problems:-)

13

Tried to place Stepper.cpp & stepper.hi same directory as knop.ino and then it works !!!!!

What directory would that be ?

14

Carsten_F:
everything is spelled correctly and there are large and small lettering grouped together where they should be.
Have tried to change uppercase to lowercase.

Did you try using " " instead of <> as I suggested?

...R

15

Carsten_F:
no !!
it is not the location that is the problem,
if it was, I got a different error message,
the problem is the way Steppers are inherited, or whatever it's called !

Do you still stand by that post?

Why did you not believe me? I did test it and I did tell you I tested it.