class PWM – Pulse Width Modulation

Quick Usage Example

from machine import PWM
pwm = PWM(0, frequency=5000)  # use PWM timer 0, with a frequency of 5KHz
# create pwm channel on pin P12 with a duty cycle of 50%
pwm_c = pwm.channel(0, pin='P12', duty_cycle=0.5)
pwm_c.duty_cycle(0.3) # change the duty cycle to 30%

Constructors

class machine.PWM(timer, frequency)

Create a PWM object. This sets up the timer to oscillate at the specified frequency. timer is an integer from 0 to 3. frequency is an integer from 1 Hz to 78 KHz (this values can change in future upgrades).

Methods

pwm.channel(id, pin * , duty_cycle=0.5)

Connect a PWM channel to a pin, setting the initial duty cycle. id is an integer from 0 to 7. pin is a string argument. duty_cycle is a keyword-only float argument, with values between 0 and 1. Returns an instance of PWMChannel.

class PWMChannel — PWM channel

Methods

pwmchannel.duty_cycle(value)

Set the duty cycle for a PWM channel. value is a float argument, with values between 0 and 1.