Two Person Pushbutton Race

Pushbutton Race

Follow this guide to create a two player “button mashing” race.

Wiring

Code

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display
const int p1 = 7;  
const int p2 = 8;  
int count1 = 0;  
int count2 = 0;
bool p1Released;
bool p2Released;
int buttonPresses = 100;
  
void setup()
{
  pinMode(p1,INPUT_PULLUP);  
  pinMode(p2,INPUT_PULLUP);  
  lcd.init(); // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
  
  lcd.clear();
  
  lcd.print("3 ");
  delay(400);  
  lcd.print("2 ");
  delay(400);  
  lcd.print("1 ");
  delay(400);  
  lcd.print("Go!");
  delay(200);  
}
void loop()

{
  if(count1 >= 100) {
    lcd.clear();  
    lcd.setCursor(0,0);  
    lcd.print("Player 1 Wins!");
    while(true)
    {
      //stay here until the reset button is pressed  lcd.setCursor(0,1);
      lcd.print("Reset to play again");   lcd.scrollDisplayLeft();  
      delay(400);  
    }
  }
  
  if(count2 >= 100) {
    lcd.clear();  
    lcd.setCursor(0,0);  
    lcd.print("Player 2 Wins!");  
    while(true)
    {
      //stay here until the reset button is pressed  lcd.setCursor(0,1);
      lcd.print("Reset to play again");
      lcd.scrollDisplayLeft();
      delay(400);  
    }
  }
  
  if(digitalRead(p1)==LOW && p1Released)
  {
    p1Released = false;
    count1++;
  }

  if(digitalRead(p2)==LOW && p2Released)
  {
    p2Released = false;
    count2++;
  }

  if(digitalRead(p1)==HIGH && !p1Released)
  {
    p1Released = true;
  }

  if(digitalRead(p2)==HIGH && !p2Released)
  {
    p2Released = true;
  }

  
  lcd.setCursor(0,0);
  lcd.print("Player 1: ");  
  lcd.print((buttonPresses - count1));
  lcd.print(" ");  
  lcd.setCursor(0,1);
  lcd.print("Player 2: ");  
  lcd.print((buttonPresses - count2));  
  lcd.print(" ");
}