树莓派控制麦克纳姆轮：42电机PWM驱动完整程序示例

下面是一个结合42电机和树莓派的PWM脉冲信号驱动麦克纳姆轮的完整程序示例：

import RPi.GPIO as GPIO
import time

# 设置GPIO口模式
GPIO.setmode(GPIO.BOARD)

# 定义电机引脚
motor_pins = [11, 13, 15, 16]

# 设置电机引脚为输出模式
for pin in motor_pins:
    GPIO.setup(pin, GPIO.OUT)

# 定义PWM对象
motor_pwm = [
    GPIO.PWM(motor_pins[0], 100),
    GPIO.PWM(motor_pins[1], 100),
    GPIO.PWM(motor_pins[2], 100),
    GPIO.PWM(motor_pins[3], 100)
]

# 启动PWM
for pwm in motor_pwm:
    pwm.start(0)

# 定义前进函数
def forward(speed):
    motor_pwm[0].ChangeDutyCycle(speed)
    motor_pwm[1].ChangeDutyCycle(0)
    motor_pwm[2].ChangeDutyCycle(speed)
    motor_pwm[3].ChangeDutyCycle(0)

# 定义后退函数
def backward(speed):
    motor_pwm[0].ChangeDutyCycle(0)
    motor_pwm[1].ChangeDutyCycle(speed)
    motor_pwm[2].ChangeDutyCycle(0)
    motor_pwm[3].ChangeDutyCycle(speed)

# 定义左转函数
def turn_left(speed):
    motor_pwm[0].ChangeDutyCycle(0)
    motor_pwm[1].ChangeDutyCycle(speed)
    motor_pwm[2].ChangeDutyCycle(speed)
    motor_pwm[3].ChangeDutyCycle(0)

# 定义右转函数
def turn_right(speed):
    motor_pwm[0].ChangeDutyCycle(speed)
    motor_pwm[1].ChangeDutyCycle(0)
    motor_pwm[2].ChangeDutyCycle(0)
    motor_pwm[3].ChangeDutyCycle(speed)

# 停止电机
def stop():
    for pwm in motor_pwm:
        pwm.ChangeDutyCycle(0)

# 测试程序
try:
    while True:
        forward(50)
        time.sleep(2)
        backward(50)
        time.sleep(2)
        turn_left(50)
        time.sleep(2)
        turn_right(50)
        time.sleep(2)
        stop()
        time.sleep(2)
except KeyboardInterrupt:
    GPIO.cleanup()

这个程序使用RPi.GPIO库控制树莓派的GPIO口，通过PWM脉冲信号驱动42电机的四个引脚，实现麦克纳姆轮的前进、后退、左转、右转和停止功能。在测试程序的时候，可以根据需要修改速度参数。