Motor Control.py

# Import the GPIO library
import RPi.GPIO as IO

# Define motor pin on Raspberry Pi
motor_pin = 12

# Set the mode as IO
IO.setmode(IO.BOARD)
IO.setup(motor_pin, IO.OUT)

# Set PWM frequency
pwm = IO.PWM(motor_pin, 100)


# Define the function that reverses the PWM value for a human readable format.
def true_pwm (num):
    true_pwm = abs(num - 100.0)
    return true_pwm
    
while True:
    try:
        value = float(input("Motor percentage float: "))
        pwm.start(true_pwm(value))
        print("Motor speed set to {}%".format(true_pwm(value))
    except KeyboardInterrupt:
        pwm.stop()
        IO.cleanup()
        print("Ctl C pressed - ending program")
    except ValueError:
        print("Error! Not a usable value.")
        # better try again... Return to the start of the loop
        continue