src/adafruit_blinka/microcontroller/rp2040_u2if/pwmio.py

   1 # SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
   2 #
   3 # SPDX-License-Identifier: MIT
   4 """PWMOut Class for RP2040s with u2if"""
   5 from .rp2040_u2if import rp2040_u2if
   6
   7
   8 class PWMOut:
   9     """Base Pulse Width Modulation Output Class"""
  10
  11     def __init__(self, pin, *, frequency=500, duty_cycle=0, variable_frequency=False):
  12         rp2040_u2if.pwm_configure(
  13             pin,
  14             frequency=frequency,
  15             duty_cycle=duty_cycle,
  16             variable_frequency=variable_frequency,
  17         )
  18
  19         self._pin = pin
  20
  21     def __del__(self):
  22         self.deinit()
  23
  24     def __enter__(self):
  25         return self
  26
  27     def __exit__(self, t, value, traceback):
  28         self.deinit()
  29
  30     def deinit(self):
  31         """Deinit PWM."""
  32         rp2040_u2if.pwm_deinit(self._pin)
  33
  34     @property
  35     def duty_cycle(self):
  36         """The PWM's output duty cycle, 16-bit."""
  37         return rp2040_u2if.pwm_get_duty_cycle(self._pin)
  38
  39     @duty_cycle.setter
  40     def duty_cycle(self, duty_cycle):
  41         rp2040_u2if.pwm_set_duty_cycle(self._pin, duty_cycle)
  42
  43     @property
  44     def frequency(self):
  45         """The PWM's output frequency in Hertz."""
  46         return rp2040_u2if.pwm_get_frequency(self._pin)
  47
  48     @frequency.setter
  49     def frequency(self, frequency):
  50         rp2040_u2if.pwm_set_frequency(self._pin, frequency)