def __init__(self,Ena,in1,in2):
# in1= input 1 forward
# in2=input 2 backward
self.Ena=Ena
self.in1=in1
self.in2=in2
GPIO.setup(self.in1,GPIO.OUT)
GPIO.setup(self.in2,GPIO.OUT)
GPIO.setup(self.Ena,GPIO.OUT)
self.p=GPIO.PWM(Ena,1000)
def _set_frequency(self, value):
if self._frequency is None and value is not None:
try:
self._pwm = GPIO.PWM(self._number, value)
except RuntimeError:
raise PinPWMFixedValue('cannot start PWM on pin %r' % self)
self._pwm.start(0)
self._duty_cycle = 0
self._frequency = value
elif self._frequency is not None and value is not None:
self._pwm.ChangeFrequency(value)
self._frequency = value
elif self._frequency is not None and value is None:
self._pwm.stop()
self._pwm = None
self._duty_cycle = None
self._frequency = None
