//// LCD ////
int Demand_Speed;   // To Store the Demand Speed in Rps // LCD
int Previous_Demand_Speed;   // To Store the Previous Value of Demand Speed in Rps // LCD
#include <LiquidCrystal.h>    // Library Adding // LCD
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);   // Assigning the LCD Pins // LCD
char nul1 = 0x00; 

//// Speed Controlling Switches(2) ////
int Left_Switch_Pin = 4;   // Assigning the Left Switch Pin // Speed Controlling
int Right_Switch_Pin = 2;   // Assigning the Right Switch Pin // Speed Controlling
bool Left_Switch_Status;   // To Store Left Switch Read Value // Speed Controlling
bool Right_Switch_Status;   // To Store Right Switch Read Value // Speed Controlling
int Actual_Speed;   // To Store Actual Speed in Rps // Speed Controlling




void setup() 
{
  //// LCD ////
  lcd.begin(16, 2);   // LCD
  lcd.setCursor(0, 0);   // Set Print Starting point // LCD
  lcd.print("EMBEDDED SYSTEMS");   // Startup Note // LCD
// lcd.print("!")  is same as lcd.write(0x21)

  delay(1000);   // Startup Note Displaying Time // LCD
  lcd.setCursor(0, 0);
  lcd.write(0x21);
  lcd.write(0x22);
  lcd.write(0x08);
  lcd.write(0x23);
  delay(1000); 

 //lcd.clear();   // Clear LCD/Clear the Startup Note // LCD



  //// Speed Controlling Switches(2) ////
  Serial.begin(9600);
  pinMode(Left_Switch_Pin, INPUT_PULLUP);   // Assigning the Left Switch Pin // Speed Controlling
  pinMode(Right_Switch_Pin, INPUT_PULLUP);   // Assigning the Right Switch Pin // Speed Controlling
}




void loop() 
{
  /*
  // LCD //
  lcd.setCursor(0, 0);
  lcd.print("Demnd Speed:");
  Previous_Demand_Speed = Demand_Speed;   // Previous Value should assign the current value,but before changing it
  Demand_Speed = analogRead(A0);
  if (Demand_Speed != Previous_Demand_Speed) // If value changed != means not equal

 // if (~(Demand_Speed == Previous_Demand_Speed))   // If value changed ~  means not (inverter)
 // if (not(Demand_Speed == Previous_Demand_Speed)) 
  {
    lcd.setCursor(12, 0);
    lcd.print("    ");  // printing 
    lcd.setCursor(12, 0);
    lcd.print(Demand_Speed);   // Print variable value of Demand speed // LCD
  }


  lcd.setCursor(0, 1);
  lcd.print("Actl Speed:");
  lcd.setCursor(12, 1);
  lcd.print(Actual_Speed);   // Print variable value of Actual speed // LCD



  //// Speed Controlling Switches(2) ////
  Left_Switch_Status = digitalRead(Left_Switch_Pin);   // Assigning Left Switch Reading to Variable // Speed Controlling
  Right_Switch_Status = digitalRead(Right_Switch_Pin);   // Assigning Right Switch Reading to Variable // Speed Controlling

  Serial.println(Actual_Speed);   // Print the Actual Speed in this moment // Speed Controlling

  if (Left_Switch_Status == 0 && Actual_Speed > 0) // And Operation(&&) is Using for Value limitation to 0  // Speed Controlling
  {
    Actual_Speed = Actual_Speed - 1;
    Serial.println(Actual_Speed);   // Print the Actual Speed in this moment // Speed Controlling
  }

  if (Right_Switch_Status == 0 && Actual_Speed < 500) // And Operation(&&) is Using for Value limitation to 500 // Speed Controlling
  {
    Actual_Speed = Actual_Speed + 1;
    Serial.println(Actual_Speed);   // Print the Actual Speed in this moment // Speed Controlling
  }
  */
}