PWM Manager

Enums

The following enums are used in this class. See the Enums page for details:

  • LogicLevel

PWMManager Class

The PWMManager class provides methods to control PWM channels.

Methods

  • Constructor:

    Initializes the PWMManager class, the PWM pins are in an unknown state until they are setup.

    Example:

    PWM_manager = gpio_manager.PWMManager()
  • setup_pwm_channel:
    Sets up a PWM channel with the specified parameters.

    The value of frequency_hz and duty_cycle overwrites period_ms and pulse_width_ms if they are set. If neither frequency_hz and duty_cycle nor period_ms and pulse_width_ms are set, the default value of 1000 hz and a duty_cycle of 0 are used.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    • frequency_hz (Optional[float]): Frequency in Hertz.

    • duty_cycle (Optional[float]): Duty cycle as a percentage (0-100).

    • period_ms (Optional[float]): Period in milliseconds.

    • pulse_width_ms (Optional[float]): Pulse width in milliseconds.

    • logic_level (Optional[LogicLevel]): Logic level of the PWM signal (HIGH, LOW).

    Example:

    PWM_manager.setup_pwm_channel(channel_num=0, frequency_hz=1000, duty_cycle=50)
PWM_manager.setup_pwm_channel(channel_num=1, period_ms=1000, pulse_width_ms=500)
  • start_pwm_channel:

    Starts the PWM signal on the specified channel.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    Example:

    PWM_manager.start_pwm_channel(channel_num=0)
  • stop_pwm_channel:

    Stops the PWM signal.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    Example:

    PWM_manager.stop_pwm_channel(channel_num=0)
  • reset_pwm_channel:

    Resets the PWM channel.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    Example:

    PWM_manager.reset_pwm_channel(channel_num=0)
  • set_duty_cycle:

    Sets the duty cycle for the specified PWM channel.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    • duty_cycle (float): Duty cycle as a percentage (0-100).

    Example:

    PWM_manager.set_duty_cycle(channel_num=0, duty_cycle=75)
  • set_frequency:

    Sets the frequency for the specified PWM channel.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    • frequency_hz (float): Frequency in Hertz.

    Example:

    PWM_manager.set_frequency(channel_num=0, frequency_hz=2000)
  • get_frequency:

    Gets the current frequency of the specified PWM channel.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    Returns: - (float): The current frequency in Hertz.

    Example:

    current_frequency = PWM_manager.get_frequency(channel_num=0)
  • get_duty_cycle:

    Gets the current duty cycle of the specified PWM channel.

    Parameters:

    • channel_num (int): The PWM channel number (0 or 1).

    Returns: - (float): The current duty cycle as a percentage (0-100).

    Example:

    current_duty_cycle = PWM_manager.get_duty_cycle(channel_num=0)
  • cleanup:

    Cleans up all PWM channels.

    Example:

    PWM_manager.cleanup()