import time


def reread_limits_from_hw(motor):
    """
    sinqMotor drivers usually read their limits from the hardware at each poll,
    hence any values manually written to DHLM or DLLM should be overwritten
    after the next poll at latest
    """
    (high_limit, low_limit) = motor.limits()
    motor.write_field('dialhighlimit', high_limit-+10)
    motor.write_field('diallowlimit', low_limit-10)

    # After two seconds, at least one poll has been done
    time.sleep(2)

    # Values should have been reread
    assert motor.read_field('highlimit') == high_limit
    assert motor.read_field('lowlimit') == low_limit
    assert motor.read_field('dialhighlimit') == high_limit
    assert motor.read_field('diallowlimit') == low_limit