Mål: Att accelerera steppermotorn till en given position med hjälp av en rotary encoder. Rotera encodern och tryck in den för att starta steppermotorn.

Rotary encoder knob

Fritzing layout

Arduino koden

// Blocking.pde
// -*- mode: C++ -*-
//
// Shows how to use the blocking call runToNewPosition
// Which sets a new target position and then waits until the stepper has 
// achieved it.
//
// Copyright (C) 2009 Mike McCauley
// $Id: Blocking.pde,v 1.1 2011/01/05 01:51:01 mikem Exp mikem $

// edited: maker 18.12.2016
// rotate encoder to a position
// press encoder button to accelerate stepper to position

#include <AccelStepper.h>
#include <Arduino.h>

const int PinCLK   = 2;     // Used for generating interrupts using CLK signal
const int PinDT    = 7;     // Used for reading DT signal
const int PinSW    = 8;     // Used for the push button switch

volatile int virtualPosition = 0;
AccelStepper stepper(4,3,4,5,6); // Defaults to AccelStepper::FULL4WIRE (4 pins) on 2, 3, 4, 5

void isr ()  {
    
    static unsigned long                lastInterruptTime = 0;

    unsigned long                       interruptTime = millis();

    // If interrupts come faster than 5ms, assume it's a bounce and ignore
    if (interruptTime - lastInterruptTime > 5) {
        if (!digitalRead(PinDT))
            virtualPosition = (virtualPosition + 1);
        else
            virtualPosition = virtualPosition - 1;
        }
    lastInterruptTime = interruptTime;
    Serial.print("position = ");
    Serial.println(virtualPosition);
    } // ISR

void setup()
{  
    stepper.setMaxSpeed(400.0);
    stepper.setAcceleration(100.0);
    Serial.begin(9600);
    pinMode(PinCLK,INPUT);
    pinMode(PinDT, INPUT);
    pinMode(PinSW, INPUT);
    attachInterrupt(0, isr, FALLING);   // interrupt 0 is always connected to pin 2 on Arduino UNO
    Serial.println("Start");

}

void loop()
{   
  int lastCount = 0;

    while (true) {
        if (!(digitalRead(PinSW))) {        // check if pushbutton is pressed
                        
            while (!digitalRead(PinSW)) {}  // wait til switch is released
             
            delay(20);                      // debounce
            stepper.runToNewPosition(virtualPosition);  
            }
        if (virtualPosition != lastCount) {
            lastCount = virtualPosition;
            
            }
            
        } 
    
    
}