import Adafruit_BBIO.PWM as PWM import time # Set the pin name led_pin = "P9_14" # Set the PWM duty cycle and frequency duty = 50 # 50% duty cycle freq = 2 # 2Hz frequency # Start the PWM PWM.start(led_pin, duty, freq) # Blink the LED for i in range(10): # Toggle the duty cycle duty = 100 - duty PWM.set_duty_cycle(led_pin, duty) # Wait for some time time.sleep(1) # Stop the PWM PWM.stop(led_pin) PWM.cleanup()
import Adafruit_BBIO.PWM as PWM import time # Set the pin name servo_pin = "P9_14" # Set the PWM duty cycle and frequency for a servo duty_min = 3 duty_max = 14.5 freq = 50 # Start the PWM PWM.start(servo_pin, (duty_max + duty_min) / 2, freq) # Move the servo back and forth for i in range(10): # Move to the "minimum" position PWM.set_duty_cycle(servo_pin, duty_min) time.sleep(1) # Move to the "maximum" position PWM.set_duty_cycle(servo_pin, duty_max) time.sleep(1) # Stop the PWM PWM.stop(servo_pin) PWM.cleanup()This code example imports the Adafruit_BBIO.PWM library and uses it to control pin P9_14, which is connected to a servo motor. The PWM duty cycle range and frequency are set to the values required by a servo (the exact values may vary depending on the servo and the application). The code then uses a loop to move the servo back and forth between its "minimum" and "maximum" positions. The PWM is stopped and cleaned up after the loop is finished. The Adafruit_BBIO PWM library is part of the Adafruit_BBIO package library, which contains various python libraries for controlling the BeagleBone Black board. The package can be installed from the terminal using the command `sudo pip install Adafruit_BBIO`.