import time
from machine import Pin

clock = Pin(2)
data = Pin(4)

SLEEP_TIME = 1


def read_adc():
    # Wait for DRDY
    while data.high():
        pass

    value = 0
    for i in range(24):
        clock.high()
        time.sleep_us(SLEEP_TIME)

        value |= data.value() << (23 - i)

        clock.low()
        time.sleep_us(SLEEP_TIME)

    # Shift 3 more bits
    for i in range(3):
        clock.high()
        time.sleep_us(SLEEP_TIME)
        clock.low()
        time.sleep_us(SLEEP_TIME)

    return value


while True:
    value = float(read_adc()) / (2**24-1)
    print(f"{value:f}")
    time.sleep(0.1)