# Motor Shield Power Driver Example # # This example shows off how to use your motor shield # to control high current switches and so on. Since # the motor shield provides two H-Bridge drivers it's # able to provide 4 high current push-pull outputs. # Each output can do up to 1A respectively. import pyb # These pins will be the ones we control to drive the # H-Bridge sides as we like. pinA = pyb.Pin('P3', pyb.Pin.OUT_PP, pyb.Pin.PULL_NONE) pinB = pyb.Pin('P2', pyb.Pin.OUT_PP, pyb.Pin.PULL_NONE) pinC = pyb.Pin('P1', pyb.Pin.OUT_PP, pyb.Pin.PULL_NONE) pinD = pyb.Pin('P0', pyb.Pin.OUT_PP, pyb.Pin.PULL_NONE) # Create a timer object running at 1KHz which which will power the # PWM output on our OpenMV Cam. Just needs to be created once. tim = pyb.Timer(4, freq=1000) # These PWM channels will set the PWM percentage on the H-Bridge # driver pair above. If you'd like to change the driver power pinABPower = tim.channel(1, pyb.Timer.PWM, pin=pyb.Pin("P7"), pulse_width_percent=100) pinCDPower = tim.channel(2, pyb.Timer.PWM, pin=pyb.Pin("P8"), pulse_width_percent=100) while (True): pyb.delay(1000) pinA.value(0) pinB.value(1) pinC.value(0) pinD.value(1) pyb.delay(1000) pinA.value(1) pinB.value(0) pinC.value(1) pinD.value(0)