File: button_reaction.py

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import utime
import machine
from hwconfig import LED, BUTTON

# machine.time_pulse_us() function demo

print("""\
Let's play an interesting game:
You click button as fast as you can, and I tell you how slow you are.
Ready? Cliiiiick!
""")

while 1:
    delay = machine.time_pulse_us(BUTTON, 1, 10*1000*1000)
    if delay < 0:
        print("Well, you're *really* slow")
    else:
        print("You are as slow as %d microseconds!" % delay)
    utime.sleep_ms(10)