/*
  Forum: https://forum.arduino.cc/t/timer-problem-accelstepper-library/1341227
  Wokwi: https://wokwi.com/projects/419796124630104065

  Originalsketch aus Post 1 Wokwi: https://wokwi.com/projects/419795832434931713

  2025/01/11

  Angepasst durch ec2021

*/


/* Sketch für eine Rotationsentwicklungs-Maschine für Jobo Dosen
  15xx und 25xx/28xx mit Nema 17 Stepper-Motor und DRV8825
  8 Umdrechungen im Uhrzeigersinn und zurück. Ca. 70 U/min */

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

const int BUZZER = 3;
const int ledPin = 4;
const unsigned long stepperDelay = 300;
const unsigned long ledIntervall  = 5000;    // 60000;
const unsigned long blinkDuration = 300;
const unsigned long buzzerIntervall = 5000; //60000;
const int stepperRechts = 3200;
const int stepperLinks  = 0;

enum StatusTyp {WARTERECHTS, RECHTS, WARTELINKS, LINKS};
StatusTyp status = WARTERECHTS;

unsigned long ledTimer  = 0;
unsigned long buzzerTimer = 0;
unsigned long stepperTimer = 0;
int LedStatus = HIGH;


// Define stepper motor connections and motor interface type. Motor interface type must be set to 1 when using a driver:
#define dirPin 0
#define stepPin 1
#define motorInterfaceType 1

// Create a new instance of the AccelStepper class:
AccelStepper stepper = AccelStepper(motorInterfaceType, stepPin, dirPin);

void setup() {

  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);
  // Set the maximum speed and acceleration:
  stepper.setMaxSpeed(470); //Half-Step
  stepper.setAcceleration(400); //Half-Step
  ledTimer = millis();
  buzzerTimer = millis();
}

void loop() {
  stateMachine();
  beep();
  blink();
}

void stateMachine() {
  switch (status) {
    case WARTERECHTS:
      if (millis() - stepperTimer > stepperDelay) {
        status = RECHTS;
        stepper.moveTo(stepperRechts);
      }
      break;
    case RECHTS:
      stepper.run();
      if (stepper.currentPosition() >= stepperRechts) {
        status = WARTELINKS;
        stepperTimer = millis();
      }
      break;
    case WARTELINKS:
      if (millis() - stepperTimer > stepperDelay) {
        status = LINKS;
        stepper.moveTo(stepperLinks);
      }
      break;
    case LINKS:
      stepper.run();
      if (stepper.currentPosition() <= stepperLinks) {
        status = WARTERECHTS;
        stepperTimer = millis();
      }
      break;
  }
}

void beep() {
  if (millis() - buzzerTimer >= buzzerIntervall ) {
    buzzerTimer = millis();
    tone(BUZZER, 500, 1000); //tone of 500Hz for 1 second/1000 milliseconds
  }
}

void blink() {
  static byte ledStatus = HIGH;
  if (millis() - ledTimer >= ledIntervall && ledStatus == HIGH) {
    ledTimer = millis();
    ledStatus = LOW;
    digitalWrite(ledPin, ledStatus);
  }
  if (millis() - ledTimer >= blinkDuration && ledStatus == LOW) {
    ledStatus = HIGH;
    digitalWrite(ledPin, ledStatus);
  }
}

// ACHTUNG:
// Hilfslösung, da der Attiny85 bei Wokwi tone() auf Pin PB3 nicht unterstützt
//
void tone(byte Pin, int f, int d) {
  pinMode(Pin, OUTPUT);
  for (int i = 0; i < 5; i++) {
    digitalWrite(Pin, HIGH);
    delay(1);
    digitalWrite(Pin, LOW);
  }
}