/*
  Forum: https://forum.arduino.cc/t/application-of-timer-in-brushed-dc-motor-control-using-arduino/1233664/3
  Wokwi: https://wokwi.com/projects/391986735398421505

*/

#include <LiquidCrystal.h>

// Define LCD pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// Define motor control pins
const int motorPin1 = 9; // PWM pin for motor speed control
const int motorPin2 = 10; // Direction pin for motor control
const int buttonPin1 = 6; // Button pin for increasing speed
const int buttonPin2 = 7; // Button pin for decreasing speed

int motorSpeed = 0; // Motor speed (0 to 255)

void setup() {
  // Set motor pins as output
  pinMode(motorPin1, OUTPUT);
  pinMode(motorPin2, OUTPUT);

  // Set button pins as input
  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);

  // Initialize LCD
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Motor Speed: ");
  lcd.setCursor(0, 1);
  lcd.print("0");
}

void loop() {
  // Increase motor speed
  if (digitalRead(buttonPin1) == LOW && motorSpeed < 255) {
    motorSpeed++;
  }

  // Decrease motor speed
  if (digitalRead(buttonPin2) == LOW && motorSpeed > 0) {
    motorSpeed--;
  }

  // Update motor speed
  analogWrite(motorPin1, motorSpeed);

  // Display motor speed on LCD
  lcd.setCursor(13, 0);
  lcd.print(" "); // Clear previous speed
  lcd.setCursor(13, 0);
  lcd.print(motorSpeed);

  delay(100); // Delay for button debouncing
}