src/adafruit_blinka/microcontroller/pico_u2if/pwmio.py

   1 """PWMOut Class for Pico u2if"""
   2 from .pico_u2if import pico_u2if
   3
   4
   5 class PWMOut:
   6     """Pulse Width Modulation Output Class"""
   7
   8     def __init__(self, pin, *, frequency=500, duty_cycle=0, variable_frequency=False):
   9         pico_u2if.pwm_configure(
  10             pin,
  11             frequency=frequency,
  12             duty_cycle=duty_cycle,
  13             variable_frequency=variable_frequency,
  14         )
  15
  16         self._pin = pin
  17
  18     def __del__(self):
  19         self.deinit()
  20
  21     def __enter__(self):
  22         return self
  23
  24     def __exit__(self, t, value, traceback):
  25         self.deinit()
  26
  27     def deinit(self):
  28         pico_u2if.pwm_deinit(self._pin)
  29
  30     @property
  31     def duty_cycle(self):
  32         """The PWM's output duty cycle, 16-bit."""
  33         return pico_u2if.pwm_get_duty_cycle(self._pin)
  34
  35     @duty_cycle.setter
  36     def duty_cycle(self, duty_cycle):
  37         pico_u2if.pwm_set_duty_cycle(self._pin, duty_cycle)
  38
  39     @property
  40     def frequency(self):
  41         """The PWM's output frequency in Hertz."""
  42         return pico_u2if.pwm_get_frequency(self._pin)
  43
  44     @frequency.setter
  45     def frequency(self, frequency):
  46         pico_u2if.pwm_set_frequency(self._pin, frequency)