from machine import Pin
from time import sleep

class BusOut:
  def __init__(self, *pins):
    self.pins = [ Pin(pin, Pin.OUT) for pin in pins ]
    self.value = 0

  def write(self, value):
    self.value = value
    for i, pin in enumerate(self.pins):
      pin.value((value >> i) & 1)

  def read(self):
    return self.value

table = {
    '0': 0b0000001,
    '1': 0b1001111,
    '2': 0b0010010,
    '3': 0b0000110,
    '4': 0b1001100,
    '5': 0b0100100,
    '6': 0b0100000,
    '7': 0b0001111,
    '8': 0b0000000,
    '9': 0b0000100,
    'A': 0b0001000,
    'B': 0b1100000,
    'C': 0b0110001,
    'D': 0b1000010,
    'E': 0b0110000,
    'F': 0b0111000,
    '*': 0b1001000,
    ' ': 0b1111111
}

segment = BusOut(14, 13, 12, 11, 10, 9, 8)
display = BusOut(4, 5, 6, 7)

def show(x):
    #x = x.rjust(4, ' ')
    i, j = 0, 1

    while i < 4:
        segment.write(table.get(' '))
        display.write(j)
        segment.write(table.get(x[i]))
        sleep(0.005)
        display.write(0)

        i = i + 1
        j = j * 2

def testSystem():
    for key in table.keys():
        show(key + key + key + key)
        sleep(0.5)

testSystem()