// STM32 Nucleo-C031C6 I2C Example
// Simulation: https://wokwi.com/projects/365421666018061313

#include "LiquidCrystal_I2C.h"
#define BUTTON_PIN 4
#define BUTTON_PIN2 3
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  Serial.begin(115200);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
   pinMode(BUTTON_PIN2, INPUT_PULLUP);

  lcd.init();
  lcd.backlight();
// lcd.print("Hello, STM32");


}
int lastState = HIGH;
int lastState2 = HIGH;
static int i=0;
void loop() {
   
 //Serial.println("Hello, STM32!");
   int value = digitalRead((BUTTON_PIN));
  if (lastState != value) {
      lcd.setCursor(4, 0);
    lastState = value;
    if (value == HIGH) {
     
      lcd.clear();
      lcd.print(++i);
      delay(500);
    }
  }

   int value2 = digitalRead((BUTTON_PIN2));
  if (lastState2 != value2) {
      lcd.setCursor(4, 0);
    lastState2 = value2;
    if (value2 == HIGH) {
      lcd.clear();
      lcd.print(--i);
      delay(500);
    }
  }
}