motor2.py

import RPi.GPIO as gpio
import time

gpio.setmode(gpio.BCM)

gpio.setwarnings(False)

# Pins
ain1 = 16
ain2 = 20
pwma = 21
bin1 = 26
bin2 = 19
pwmb = 13
stby = 12

## Setup

# Standby channel
gpio.setup(stby, gpio.OUT)

# PWM channels
gpio.setup(pwma, gpio.OUT)
gpio.setup(pwmb, gpio.OUT)

# Direction channels
gpio.setup(ain1, gpio.OUT)
gpio.setup(ain2, gpio.OUT)
gpio.setup(bin1, gpio.OUT)
gpio.setup(bin2, gpio.OUT)

## Control

while True:
    
    # Standby
    gpio.output(stby, gpio.HIGH)

    # PWM channels
    gpio.output(pwma, gpio.HIGH)
    gpio.output(pwmb, gpio.HIGH)

    # Direction channels
    gpio.output(ain1, gpio.HIGH)
    gpio.output(ain2, gpio.LOW)
    gpio.output(bin1, gpio.HIGH)
    gpio.output(bin2, gpio.LOW)