from machine import Pin, time_pulse_us
from time import sleep, sleep_us

# === 핀 설정 ===
led = Pin(1, Pin.OUT)
button1 = Pin(4, Pin.IN, Pin.PULL_DOWN)
button2 = Pin(5, Pin.IN, Pin.PULL_DOWN)
trig = Pin(3, Pin.OUT)
echo = Pin(2, Pin.IN)

# === 주기 설정
T_list = [1, 2, 4]
T_index = 0
T = T_list[T_index]
is_led_active = False

# === 거리 측정 함수
def measure_distance():
    trig.low()
    sleep_us(2)
    trig.high()
    sleep_us(10)
    trig.low()

    duration = time_pulse_us(echo, 1, 30000)  # timeout: 30ms
    distance = duration * 0.0343 / 2
    return distance

# === 실행 시작
print("시작됐다 이놈아")

# === 메인 루프
while True:
    if not is_led_active:
        if button1.value() == 1:
            T_index = (T_index + 1) % len(T_list)
            T = T_list[T_index]
            print(f"주기 변경됨: T = {T}초")
            sleep(0.3)

        if button2.value() == 1:
            is_led_active = True
            distance = measure_distance()
            C = int(distance // 100) + 1
            print(f"거리: {distance:.1f} cm → LED {C}번 깜빡임")

            for _ in range(C):
                led.on()
                sleep(T / 2)
                led.off()
                sleep(T / 2)

            is_led_active = False
            print("LED 깜빡임 완료.")