from machine import Pin,PWM
import utime, time
???????????????????
???????????????????
green.value(0)
red.value(0)
motor = PWM(Pin(27))
motor.freq(50)
keys = [[1,     2,   3,  'A'],
        [4,     5,   6,  'B'],
        [7,     8,   9,   'C'],
        ['*',   0,  '#', 'D']]
rows = [26, 22,21,20]     
columns = [19,18,17,16]   
col_pins = []
row_pins = []
for x in range(0,4):
    row_pins.append(Pin(rows[x], Pin.OUT))
    col_pins.append(Pin(columns[x], Pin.IN, Pin.PULL_DOWN))
?????????????????????????????????????????????????????
password=''
close_pos = 500000
open_pos = 1450000
motor.duty_ns(close_pos)
status = 'idle'
door='closed'
motor.duty_ns(close_pos)

while True:
    for row in range(4):
        row_pins[row].value(1)
        for col in range(4):
            key = ???????????????????????
            if key:
                pressed_key = keys[row][col]
                if ?????????????????????????????????????????:
                    print('\npasswrod 입력 해 주세요!')
                    status = 'ready'
                    password = ''
                elif ??????????????????????????????????????:
                    motor.duty_ns(close_pos)
                    print('\n금고문이 닫혔습니다')
                    green.value(0)
                    door = 'closed'
                elif status == 'ready':
                        pas???????????????????????????????????
                        print('*', end='')
                while col_pins[col].value():  # 계속 눌려져 있을 때 오류 방지
                    pass
                if ??????????????????????????????:
                    if ?????????????????:
                        time.sleep(1)
                        print('\n금고문이 열립니다')
                        green.value(1)
                        door = 'open'
                        ???????????????????
                    else:
                        print('\n비밀번호가 틀립니다.')
                        for i in range(5):
                            red.value(1)
                            time.sleep(0.5)
                            red.value(0)
                            time.sleep(0.5)
                    status='idle'
                    password = ''
            utime.sleep(0.01)
        row_pins[row].value(0)
    time.sleep(0.1)