from machine import Pin
import time

linhas = [
  Pin(19, Pin.OUT), 
  Pin(21, Pin.OUT), 
  Pin(22, Pin.OUT), 
  Pin(23, Pin.OUT)
]

colunas = [
  Pin(18, Pin.IN, Pin.PULL_DOWN), 
  Pin(5, Pin.IN, Pin.PULL_DOWN), 
  Pin(17, Pin.IN, Pin.PULL_DOWN), 
  Pin(16, Pin.IN, Pin.PULL_DOWN)
]

teclas = [
  ['E', '0', 'F', 'D'],
  ['7', '8', '9', 'C'],
  ['4', '5', '6', 'B'],
  ['1', '2', '3', 'A']
]

segmentos = [
  Pin(25, Pin.OUT),  # a
  Pin(26, Pin.OUT),  # b
  Pin(27, Pin.OUT),  # c
  Pin(14, Pin.OUT),  # d
  Pin(12, Pin.OUT),  # e
  Pin(33, Pin.OUT),  # f
  Pin(32, Pin.OUT)   # g
]

# Mapeamento dos números para os segmentos (comum cátodo)
caracteres = {
  '0': [1, 1, 1, 1, 1, 1, 0],
  '1': [0, 1, 1, 0, 0, 0, 0],
  '2': [1, 1, 0, 1, 1, 0, 1],
  '3': [1, 1, 1, 1, 0, 0, 1],
  '4': [0, 1, 1, 0, 0, 1, 1],
  '5': [1, 0, 1, 1, 0, 1, 1],
  '6': [1, 0, 1, 1, 1, 1, 1],
  '7': [1, 1, 1, 0, 0, 0, 0],
  '8': [1, 1, 1, 1, 1, 1, 1],
  '9': [1, 1, 1, 1, 0, 1, 1],  
  'A': [1, 1, 1, 0, 1, 1, 1],
  'B': [0, 0, 1, 1, 1, 1, 1],
  'C': [1, 0, 0, 1, 1, 1, 0],
  'D': [0, 1, 1, 1, 1, 0, 1],
  'E': [1, 0, 0, 1, 1, 1, 1],
  'F': [1, 0, 0, 0, 1, 1, 1]
}

def mostrar_caractere(caractere):
  if caractere in caracteres:
    for i in range(7):
      segmentos[i].value(caracteres[caractere][i])
  else:
    for seg in segmentos:
      seg.value(0)


def ler_teclado():
  for i in range(4):
    for linha in linhas:
      linha.value(0)
      linhas[i].value(1)
      for j in range(4):
        if colunas[j].value() == 1:
          time.sleep_ms(20)
          if colunas[j].value() == 1:
            linhas[i].value(0)
            return teclas[i][j]
    linhas[i].value(0)
  return None

def apagar_display():
  for seg in segmentos:
    seg.value(0)

ultima_tecla = None
while True:
  tecla = ler_teclado()
  if tecla and tecla != ultima_tecla:
    print("Tecla pressionada:", tecla)
    if tecla in caracteres:
      mostrar_caractere(tecla)
    ultima_tecla = tecla
  time.sleep_ms(20)