Two wire Driver / Cannot instantiate AccelStepper with fewer than (x6) arguments

[Brian C]

Connecting a TB6600 driver to a Nema 17 stepper.  I've gotten this to work fine with the Stepper library integrated with Arduino's Sketch IDE.  Trying to use AccelStepper.

However, using  AccelStepper  , the constructor requires (x6) arguments.  How can this code ever work?  The include file clearly shows only one possible constructor.

-B

CODE

void setup() {
  #define _PIN_DIRECTION 6
  #define _PIN_PULSE 7

  #include <AccelStepper.h>
  AccelStepper stepper(1, _PIN_PULSE, _PIN_DIRECTION);
}

void loop() {
}

COMPILER ERROR

In file included from C:\Users\...\Documents\Arduino\testAccelStepperDriver\testAccelStepperDriver.ino:7:0:
C:\Users\...\Documents\Arduino\libraries\AccelStepper\src/AccelStepper.h:373:5: warning: 'setup()::AccelStepper::AccelStepper(uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, bool)' used but never defined
     AccelStepper(uint8_t interface = AccelStepper::FULL4WIRE, uint8_t pin1 = 2, uint8_t pin2 = 3, uint8_t pin3 = 4, uint8_t pin4 = 5, bool enable = true);
     ^~~~~~~~~~~~
C:\Users\...\AppData\Local\Temp\ccC0Vm6p.ltrans0.ltrans.o: In function `setup':
C:\Users\...\Documents\Arduino\testAccelStepperDriver/testAccelStepperDriver.ino:9: undefined reference to `setup::AccelStepper::AccelStepper(unsigned char, unsigned char, unsigned char, unsigned char, unsigned char, bool)'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino Uno.

INCLUDE (*.H)

AccelStepper(uint8_t interface = AccelStepper::FULL4WIRE, uint8_t pin1 = 2, uint8_t pin2 = 3, uint8_t pin3 = 4, uint8_t pin4 = 5, bool enable = true);

[Mike McCauley]

Hello,

On Sunday, 23 January 2022 15:29:35 AEST Brian C wrote:
> Connecting a TB6600 driver to a Nema 17 stepper. I've gotten this to work
> fine with the Stepper library integrated with Arduino's Sketch IDE. Trying
> to use AccelStepper.
>
> However, using AccelStepper , the constructor requires (x6) arguments.
> How can this code ever work? The include file clearly shows only one
> possible constructor.

There are 2 possible constructors

AccelStepper(uint8_t interface = AccelStepper::FULL4WIRE, uint8_t pin1 = 2,
uint8_t pin2 = 3, uint8_t pin3 = 4, uint8_t pin4 = 5, bool enable = true);

6 arguments, all optional

AccelStepper(void (*forward)(), void (*backward)());

2 arguments, both pointers, none optional.

Cheers.


>
> -B
>
> *CODE*

> void setup() {
> #define _PIN_DIRECTION 6
> #define _PIN_PULSE 7
>
> #include <AccelStepper.h>
> AccelStepper stepper(1, _PIN_PULSE, _PIN_DIRECTION);
> }
>
> void loop() {
> }
>

> *COMPILER ERROR*

> In file included from
> C:\Users\...\Documents\Arduino\testAccelStepperDriver\testAccelStepperDriver
> .ino:7:0:
> C:\Users\...\Documents\Arduino\libraries\AccelStepper\src/AccelStepper.h:37
> 3:5: warning: 'setup()::AccelStepper::AccelStepper(uint8_t, uint8_t,
> uint8_t, uint8_t, uint8_t, bool)' used but never defined
> AccelStepper(uint8_t interface = AccelStepper::FULL4WIRE, uint8_t pin1
> = 2, uint8_t pin2 = 3, uint8_t pin3 = 4, uint8_t pin4 = 5, bool enable =
> true);
> ^~~~~~~~~~~~
> C:\Users\...\AppData\Local\Temp\ccC0Vm6p.ltrans0.ltrans.o: In function
> `setup':
> C:\Users\...\Documents\Arduino\testAccelStepperDriver/testAccelStepperDriver
> .ino:9: undefined reference to `setup::AccelStepper::AccelStepper(unsigned
> char, unsigned char, unsigned char, unsigned char, unsigned char, bool)'
> collect2.exe: error: ld returned 1 exit status
> exit status 1
> Error compiling for board Arduino Uno.
>

> *INCLUDE (*.H)*

> AccelStepper(uint8_t interface = AccelStepper::FULL4WIRE, uint8_t pin1 = 2,
> uint8_t pin2 = 3, uint8_t pin3 = 4, uint8_t pin4 = 5, bool enable = true);

--
Mike McCauley VK4AMM mi...@airspayce.com
Airspayce Pty Ltd 9 Bulbul Place Currumbin Waters QLD 4223 Australia
http://www.airspayce.com 5R3MRFM2+X6
Phone +61 7 5598-7474

[Alan Stepney]

Should the #include be above setup()?

Al

Sent from my iPad

> On 23 Jan 2022, at 05:56, Mike McCauley <mi...@airspayce.com> wrote:
>
> Hello,

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[Mike McCauley]

On Sunday, 23 January 2022 17:14:08 AEST Alan Stepney wrote:
> Should the #include be above setup()?

YES!!!

Suggest you start with the example sketches and work from there.

[Brian C]

Excellent!  Good catch.

So, now that I'm compiling I will be testing soon.  However, I think I still have the same question:

AccelStepper(AccelStepper::DRIVER, pinA, pinB) only has (x3) arguments.  There is no signature like this in the definition of the class.  How does this work?

-B

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[Mike McCauley]

On Monday, 24 January 2022 03:13:52 AEST Brian C wrote:
> Excellent! Good catch.
>
> So, now that I'm compiling I will be testing soon. However, I think I
> still have the same question:
>
> AccelStepper(AccelStepper::DRIVER, pinA, pinB) only has (x3) arguments.
> There is no signature like this in the definition of the class. How does
> this work?

This is a basic C++ question about default arguments for member function (ie
constructors). You should consult a C++ reference for that.

Cheers.

[Jim Larson]

To the OP - you should also instantiate the AccelStepper object globally, outside of setup(), so it can be referenced in your loop().

You will find a lot of useful information and some examples here:

https://hackaday.io/project/183279-accelstepper-the-missing-manual

HTH!