def timer_tick(self):
"""Called by the platform each machine tick based on self.HZ"""
self.timing.timer_tick() # notifies the timing module
self.events.post('timer_tick') # sends the timer_tick system event
self.tick_num += 1
Task.timer_tick() # notifies tasks
DelayManager.timer_tick(self)
self.events._process_event_queue()
