Raspberry Pi连接到电机控制器-代码中出现错误

Question

*Hi, I am getting this code error:
*blink.py:25: RuntimeWarning: This channel is already in use, continuing anyway. Use GPIO.setwarnings(False) to disable warnings.*
GPIO.setup(ENA1,GPIO.OUT)
Traceback (most recent call last):
File "/home/pi/my_python_programs/blink.py", line 27, in <module>
GPIO.output(IN1,GPIO.LOW)
RuntimeError: The GPIO channel has not been set up as an OUTPUT*

这是参考我从树莓派控制电机控制器的代码。这是我的密码。我想知道错误是什么：

#ImportedLibraries
import RPi.GPIO as GPIO
from time import sleep
#Motor1
PWR= 17
ENA1 = 33
IN1 = 31
IN2 = 29
GND = 39
#Motor2
PWR = 1
ENA2 = 32
IN3 = 18
IN4 = 16
GND = 34
#SetMode
GPIO.setmode(GPIO.BOARD)
#Motor1
GPIO.setup(ENA1,GPIO.OUT)
PWM1=GPIO.PWM(ENA1,100)
GPIO.output(IN1,GPIO.LOW)
GPIO.output(IN2,GPIO.LOW)
#Motor2
GPIO.setup(ENA2,GPIO.OUT)
PWM2=GPIO.PWM(ENA2,100)
GPIO.output(IN3,GPIO.LOW)
GPIO.output(IN4,GPIO.LOW)
PWM1.start(10)

Answer 1

设置似乎做得不太好，在第25行失败了。

如果你想控制一个电机，你需要一个H桥，比如L293D或L298，然后使用gpiozero库，在网上寻找它。

尝试使用此代码：

from gpiozero import Motor
from time import sleep
motor = Motor(forward=4, backward=14)
while True:
motor.forward()
sleep(5)
motor.backward()
sleep(5)