class Buzzer(object):
'''
Makes a buzzer playing notes
'''
def __init__(self, port, stopDelay=0):
'''
Constructor
@param port: PWM port where the buzzer is connected to
@param stopDelay: Delay in seconds to separate notes
'''
self._stopDelay = stopDelay
self._pwm = Pwm(port)
def playNote(self, freq, time):
'''
Plays a frequency sound during a time
@param freq: Frequency of the played sound. If this value is 0 a silence will be performed.
@param time: Time the sound will be played
'''
if freq > 0.0:
self._pwm.setFreq(freq)
self._pwm.setDutyPerc(50)
self._pwm.start()
sleep(time - self._stopDelay)
self._pwm.stop()
sleep(self._stopDelay)
else:
sleep(time)
def cleanup(self):
'''
Frees all using resources
'''
self._pwm.cleanup()
