motor.py

#!/usr/bin/python3

from time import sleep
from ev3dev import auto as ev3dev

m = ev3dev.LargeMotor(ev3dev.OUTPUT_B)

def drive_regulated():
    m.run_forever(speed_regulation_enabled='on', speed_sp=10)

    for x in range(10, 100, 10):
        v = int((x * m.max_speed) / 100.0)
        # no effect
        # m.speed_sp = v
        # does this have overhead?
        m.run_forever(speed_sp=v)
        print(m.speed_sp, m.speed)
        sleep(0.5)
    m.stop()

def drive_unregulated():
    m.run_direct(duty_cycle_sp=1)
    for x in range(10, 100, 10):
        v = x
        # works, yeah!
        m.duty_cycle_sp = v
        # not required
        #m.run_direct(duty_cycle_sp=v)
        print(m.duty_cycle_sp, m.duty_cycle_sp)
        sleep(0.5)
    m.stop()

drive_unregulated()