import Adafruit_BBIO.PWM as PWM servo_pin = "P8_13" # PWM output pin for servo PWM.start(servo_pin, 0, 50) # start PWM output at 0% duty cycle and 50 Hz frequency # set servo position PWM.set_duty_cycle(servo_pin, 5) # 5% duty cycle for minimum position time.sleep(1) PWM.set_duty_cycle(servo_pin, 7.5) # 7.5% duty cycle for center position time.sleep(1) PWM.set_duty_cycle(servo_pin, 10) # 10% duty cycle for maximum position time.sleep(1) PWM.stop(servo_pin) # stop PWM output PWM.cleanup() # cleanup module resources
import Adafruit_BBIO.PWM as PWM led_pin = "P8_19" # PWM output pin for LED PWM.start(led_pin, 0, 100) # start PWM output at 0% duty cycle and 100 Hz frequency # dim LED from 0% to 100% brightness for duty_cycle in range(0, 101): PWM.set_duty_cycle(led_pin, duty_cycle) time.sleep(0.02) PWM.stop(led_pin) # stop PWM output PWM.cleanup() # cleanup module resourcesThis code initializes a PWM output on the `P8_19` pin and gradually increases the duty cycle to dim an LED. The Adafruit_BBIO PWM start module is part of the Adafruit_BBIO package library, which is a Python module for accessing the GPIO and PWM functionality of the BeagleBone Black board.