import utime
from machine import Pin

def read_test():
    h = Pin(35,Pin.IN)
    # utime.ticks_us()ŌvJn擾
    s = utime.ticks_us()
    for i in range(1000):
        val = 0
        for i in range(8):
            val <<= 1
            val |= h.value()
    # utime.ticks_diffŎsԂZo
    delta = utime.ticks_diff(utime.ticks_us(),s)
    print(f"{delta:d} usec")  # sԕ\
