Modification of AccelStepper Sketch.

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1

Hi,

I need someone that can help me modify this sketch. I'm not using any buttons.

// Example5 code for Brian Schmalz's Easy Driver Example page
// http://www.schmalzhaus.com/EasyDriver/EasyDriverExamples.html

#include <AccelStepper.h>

// Define the stepper and the pins it will use
AccelStepper stepper1(1, 9, 8);

// Define our three input button pins
#define  LEFT_PIN  4
#define  STOP_PIN  3
#define  RIGHT_PIN 2

// Define our analog pot input pin
#define  SPEED_PIN 0

// Define our maximum and minimum speed in steps per second (scale pot to these)
#define  MAX_SPEED 500
#define  MIN_SPEED 0.1

void setup() {
  // The only AccelStepper value we have to set here is the max speeed, which is higher than we'll ever go 
  stepper1.setMaxSpeed(10000.0);
  
  // Set up the three button inputs, with pullups
  pinMode(LEFT_PIN, INPUT_PULLUP);
  pinMode(STOP_PIN, INPUT_PULLUP);
  pinMode(RIGHT_PIN, INPUT_PULLUP);
}

void loop() {
  static float current_speed = 0.0;         // Holds current motor speed in steps/second
  static int analog_read_counter = 1000;    // Counts down to 0 to fire analog read
  static char sign = 0;                     // Holds -1, 1 or 0 to turn the motor on/off and control direction
  static int analog_value = 0;              // Holds raw analog value.
  
  // If a switch is pushed down (low), set the sign value appropriately
  if (digitalRead(LEFT_PIN) == 0) {
    sign = 1;
  }
  else if (digitalRead(RIGHT_PIN) == 0) {    
    sign = -1;
  }
  else if (digitalRead(STOP_PIN) == 0) {
    sign = 0;
  }

  // We only want to read the pot every so often (because it takes a long time we don't
  // want to do it every time through the main loop).  
  if (analog_read_counter > 0) {
    analog_read_counter--;
  }
  else {
    analog_read_counter = 3000;
    // Now read the pot (from 0 to 1023)
    analog_value = analogRead(SPEED_PIN);
    // Give the stepper a chance to step if it needs to
    stepper1.runSpeed();
    //  And scale the pot's value from min to max speeds
    current_speed = sign * ((analog_value/1023.0) * (MAX_SPEED - MIN_SPEED)) + MIN_SPEED;
    // Update the stepper to run at this new speed
    stepper1.setSpeed(current_speed);
  }

  // This will run the stepper at a constant speed
  stepper1.runSpeed();
}

I want to combine these two sketches. Keeping in mind that I'm not using any buttons. The speed of the stepper is set by the potentiometer, the direction and position by the code below.

#include <AccelStepper.h>

// Define a stepper and the pins it will use
AccelStepper stepper(1, 9, 8);

int pos = 3600;

void setup()
{  
  stepper.setMaxSpeed(3000);
  stepper.setAcceleration(1000);
}

void loop()
{
  if (stepper.distanceToGo() == 0)
  {
    delay(500);
    pos = -pos;
    stepper.moveTo(pos);
  }
  stepper.run();
}

Hopefully this makes sense. Let me know if you have any questions and how much this would cost.

Thanks.........Antonio

2

I have sent you a PM.

3

The FIRST step is to define the requirements for the resulting program. The second step, after that, is trivial.

The first code does something when a switch is pressed. If you want that to happen regardless of whether the switch is pressed or not, It's trivial to remove the if statement and the curly braces, and to fix the indenting.

The second code moves the stepper to some position, and then, when it gets there, moves it back to where it started from.

I don't see anything in either code that uses the value of a pot for anything.

Perhaps you shouldn't be using so much pot.