from machine import Pin
from time import sleep
from lcd import lcd_init , lcd_print, lcd_clear
from keypad import Keypad

#keypad :
row_pins = [Pin(25), Pin(26), Pin(27), Pin(14)]
column_pins = [Pin(12), Pin(13), Pin(32), Pin(33)]
keys = [
  ['1', '2', '3', 'A'],
  ['4', '5', '6', 'B'],
  ['7', '8', '9', 'C'],
  ['*', '0', '#', 'D']
]

keypad = Keypad(row_pins, column_pins, keys)

#lcd :
lcd_init()

buffer = ""

while True :
  key_pressed = keypad.read_keypad()
  if key_pressed :
    if key_pressed == 'D':
      buffer = ""
      lcd_clear()
    else :
      buffer += key_pressed
      lcd_clear()
      lcd_print(buffer)
  sleep(0.1)