avstand_til_fil

from microbit import *
from utime import ticks_us, sleep_us


SONAR = pin15

def sonar():
    SONAR.write_digital(1) # Send 10us Ping pulse
    sleep_us(10)
    SONAR.write_digital(0)
    SONAR.set_pull(SONAR.NO_PULL)
    while SONAR.read_digital() == 0: # ensure Ping pulse has cleared
        pass
    start = ticks_us() # define starting time
    while SONAR.read_digital() == 1: # wait for Echo pulse to return
        pass
    end = ticks_us() # define ending time
    echo = end-start
    distance = int(0.01715 * echo) # Calculate cm distance
    return distance


def mal(antall_malinger, tidsforskjell, malesett):
#gjør antall_malinger avstandsmålinger med delta_t på tidsforskjell millisekunder
    malinger = ""
    for maling in range(antall_malinger):
        distanse = sonar()
        malinger += str(distanse) + ", "
        sleep(tidsforskjell)

    malinger = malinger[:-2]
    with open('posisjon' + str(malesett)+'.txt','w') as posisjonsdata:
        posisjonsdata.write(malinger)
    malesett += 1
    display.show("Ferdig")


malesett = 0
while True:
    if button_a.is_pressed():
        mal(100, 100, malesett)
        malesett += 1