3D-Microstat/Controller_Arduino_Script at main · david-a-krupp/3D-Microstat · GitHub

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#include <AccelStepper.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Pin Definitions
#define MOTOR1_STEP_PIN 2   // Large axis
#define MOTOR1_DIR_PIN 3
#define MOTOR2_STEP_PIN 4   // Small axis
#define MOTOR2_DIR_PIN 5
#define BUTTON_PIN 7        // Start/Stop button

// LCD Setup
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Stepper Setup
AccelStepper motor1(AccelStepper::DRIVER, MOTOR1_STEP_PIN, MOTOR1_DIR_PIN);
AccelStepper motor2(AccelStepper::DRIVER, MOTOR2_STEP_PIN, MOTOR2_DIR_PIN);

// State
bool running = false;
unsigned long startTime = 0;

void setup() {
  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Microstat Ready");
  lcd.setCursor(0, 1);
  lcd.print("Press Button...");

  // Button setup
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  // Set motor speeds for 1/16 microstepping
  // Large axis: 10 RPM => ~533 steps/sec
  // Small axis: 4.5 RPM => ~240 steps/sec
  motor1.setMaxSpeed(533);
  motor1.setSpeed(533);

  motor2.setMaxSpeed(240);
  motor2.setSpeed(240);
}

void loop() {
  static bool lastButtonState = HIGH;
  bool buttonState = digitalRead(BUTTON_PIN);

  // Toggle running state on button press
  if (lastButtonState == HIGH && buttonState == LOW) {
    running = !running;

    if (running) {
      // Just started: record time
      startTime = millis();
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Microstat Running");
    } else {
      // Stopped: show ready screen again
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Microstat Ready");
      lcd.setCursor(0, 1);
      lcd.print("Press Button...");
    }

    delay(300); // debounce
  }
  lastButtonState = buttonState;

  if (running) {
    motor1.runSpeed();
    motor2.runSpeed();

    // Calculate elapsed time in ms
    unsigned long elapsedMillis = millis() - startTime;

    // Convert to days, hours, mins, secs
    unsigned long totalSecs = elapsedMillis / 1000;
    unsigned int days = totalSecs / 86400;
    unsigned int hours = (totalSecs % 86400) / 3600;
    unsigned int mins = (totalSecs % 3600) / 60;
    unsigned int secs = totalSecs % 60;

    // Display on LCD line 2
    lcd.setCursor(0, 1);
    lcd.print(days);
    lcd.print("d ");
    if (hours < 10) lcd.print('0');
    lcd.print(hours);
    lcd.print(":");
    if (mins < 10) lcd.print('0');
    lcd.print(mins);
    lcd.print(":");
    if (secs < 10) lcd.print('0');
    lcd.print(secs);
  }
}