l298n驱动步进电机接线
时间: 2023-11-21 17:55:53 浏览: 110
L298N芯片可以驱动步进电机,接线方法如下:
1. 将步进电机的A+、A-、B+、B-四个引脚分别连接到L298N芯片的OUT1、OUT2、OUT3、OUT4四个引脚上。
2. 将L298N芯片的ENA和ENB引脚分别连接到单片机的IO口上,用于控制步进电机的使能。
3. 将L298N芯片的IN1、IN2、IN3、IN4四个引脚分别连接到单片机的IO口上,用于控制步进电机的转动方向。
下面是一个简单的Python代码示例,用于控制L298N芯片驱动步进电机:
```python
import RPi.GPIO as GPIO
import time
# 定义引脚
ENA = 13
IN1 = 19
IN2 = 26
IN3 = 20
IN4 = 21
# 初始化GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(ENA, GPIO.OUT)
GPIO.setup(IN1, GPIO.OUT)
GPIO.setup(IN2, GPIO.OUT)
GPIO.setup(IN3, GPIO.OUT)
GPIO.setup(IN4, GPIO.OUT)
# 设置步进电机转动方向
def setStep(w1, w2, w3, w4):
GPIO.output(IN1, w1)
GPIO.output(IN2, w2)
GPIO.output(IN3, w3)
GPIO.output(IN4, w4)
# 步进电机正转
def forward(delay, steps):
GPIO.output(ENA, True)
for i in range(steps):
setStep(True, False, True, False)
time.sleep(delay)
setStep(False, True, True, False)
time.sleep(delay)
setStep(False, True, False, True)
time.sleep(delay)
setStep(True, False, False, True)
time.sleep(delay)
# 步进电机反转
def backward(delay, steps):
GPIO.output(ENA, True)
for i in range(steps):
setStep(True, False, False, True)
time.sleep(delay)
setStep(False, True, False, True)
time.sleep(delay)
setStep(False, True, True, False)
time.sleep(delay)
setStep(True, False, True, False)
time.sleep(delay)
# 控制步进电机转动
if __name__ == '__main__':
try:
while True:
delay = 0.01
steps = 100
forward(delay, steps)
backward(delay, steps)
except KeyboardInterrupt:
GPIO.cleanup()
```
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