Simulation_code.txt

#include <LiquidCrystal.h>
int led = 10;
int switchpin1 = 9;
int switchpin2 = 8;
int switchpin3 = 7;
int switchpin4 = 6;
int switchpin5 = 13;
int a;
int b;
int c;
int d;
int e;
int f;
int g;
int switchstate;
const int rs = 12, en = 11, d4 =5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
void setup()
{
 Serial.begin(9600);
 lcd.begin(16,2);
 pinMode(led, OUTPUT);
 pinMode(switchpin1, INPUT);
 pinMode(switchpin2, INPUT);
 pinMode(switchpin3, INPUT);
 pinMode(switchpin4, INPUT);
 pinMode(switchpin5, INPUT);
}
void loop()
{
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Choose 4 bits 4");
 lcd.setCursor(0,1);
 lcd.print("Even hamming");
 delay(250);
    if (digitalRead(switchpin1)) 
    {
    c=1;
  	} 
    else 
    {
    c=0;
  	}
  		if (digitalRead(switchpin2))
        {
        e=1;
          delay(250);
        }
        else
        {
        e=0;  
          delay(250);
        }
        	if (digitalRead(switchpin2))
        	{
        	f=1;
              delay(250);
            }
        	else
        	{
        	f=0;  
              delay(250);
        	}
            	if (digitalRead(switchpin2))
        		{
        		g=1;
                  delay(250);
                }
        		else
        		{
        		g=0;  
                  delay(250);
        		}
  
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Bits choosen:");
  lcd.setCursor(0,1);
  lcd.print(c);
  delay(250);
  lcd.setCursor(1,1);
  lcd.print(e);
  delay(250);
  lcd.setCursor(2,1);
  lcd.print(f);
  delay(250);
  lcd.setCursor(3,1);
  lcd.print(g);
  delay(1000);
  if (digitalRead(switchpin5))
  {
    digitalWrite(led, HIGH);	// turn the LED on (HIGH is the voltage level)
  	delay(250); 
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Even Hamming:");
    delay(1000);
    if ((c+e+g)%2 ==0)// parity bit 1 checks b3,b5,b7
    {
    a=0; 
    }
    else
    {
    a=1; 
    }
    if ((c+f+g)%2==0) // parity bit 2 checks b3,b6,b7
    {
     b=0; 
    }
    else
    {
     b=1; 
    }
    if ((e+f+g)%2==0) // parity bit 3 checks b5,b6,b7
    {
     d=0; 
    }
    else
    {
     d=1; 
    }
    lcd.setCursor(0,1);
    lcd.print(a);
    lcd.setCursor(1,1);
    lcd.print(b);
    lcd.setCursor(2,1);
    lcd.print(c);
    lcd.setCursor(3,1);
    lcd.print(d);
    lcd.setCursor(4,1);
    lcd.print(e);
    lcd.setCursor(5,1);
    lcd.print(f);
    lcd.setCursor(6,1);
    lcd.print(g);
    delay(1000);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Parity bits");
    lcd.setCursor(0,1);
    lcd.print("are:");
    lcd.setCursor(5,1);
    lcd.print(a);
    lcd.setCursor(6,1);
    lcd.print(b);
    lcd.setCursor(7,1);
    lcd.print(d);
    delay(1000);
  }
  else
  {
    digitalWrite(led, LOW);		// turn the LED off by making the voltage LOW    
  	delay(250);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Reselect bits");
    delay(1000);
  }
}