python利用RGB-LED模块中R颜色发光二级管和G颜色发光二级管来模拟一个十字路口单方向的红绿灯控制功能(B颜色发光二级管不用) (1)绿灯先亮10s(前7秒绿灯常亮,后3秒绿灯闪烁(0.5秒闪亮一次)) (2)绿灯灭,等待0.5s,然后黄灯亮3s; 说明:由于模块上没有黄色的发光二极管。可以用红灯和绿灯同时亮来模拟黄灯; (3)黄灯灭,等待0.5s,红灯亮10s; (4)反复循环上次过程,知道按住“ctrl+c” 结束
时间: 2023-03-26 12:03:40 浏览: 59
可以使用以下代码实现:
```python
import RPi.GPIO as GPIO
import time
# 设置GPIO模式为BCM
GPIO.setmode(GPIO.BCM)
# 设置红绿灯引脚
red_pin = 18
green_pin = 23
# 设置GPIO输出模式
GPIO.setup(red_pin, GPIO.OUT)
GPIO.setup(green_pin, GPIO.OUT)
# 绿灯先亮10s
GPIO.output(green_pin, GPIO.HIGH)
time.sleep(7)
for i in range(6):
GPIO.output(green_pin, not GPIO.input(green_pin))
time.sleep(.5)
GPIO.output(green_pin, GPIO.LOW)
# 等待.5s,然后黄灯亮3s
time.sleep(.5)
GPIO.output(red_pin, GPIO.HIGH)
GPIO.output(green_pin, GPIO.HIGH)
time.sleep(3)
GPIO.output(green_pin, GPIO.LOW)
# 等待.5s,红灯亮10s
time.sleep(.5)
GPIO.output(red_pin, GPIO.LOW)
GPIO.output(green_pin, GPIO.LOW)
GPIO.output(red_pin, GPIO.HIGH)
time.sleep(10)
# 反复循环上次过程,知道按住“ctrl c” 结束
while True:
# 绿灯先亮10s
GPIO.output(green_pin, GPIO.HIGH)
time.sleep(7)
for i in range(6):
GPIO.output(green_pin, not GPIO.input(green_pin))
time.sleep(.5)
GPIO.output(green_pin, GPIO.LOW)
# 等待.5s,然后黄灯亮3s
time.sleep(.5)
GPIO.output(red_pin, GPIO.HIGH)
GPIO.output(green_pin, GPIO.HIGH)
time.sleep(3)
GPIO.output(green_pin, GPIO.LOW)
# 等待.5s,红灯亮10s
time.sleep(.5)
GPIO.output(red_pin, GPIO.LOW)
GPIO.output(green_pin, GPIO.LOW)
GPIO.output(red_pin, GPIO.HIGH)
time.sleep(10)
```
注意:这段代码需要在树莓派上运行,同时需要连接一个RGB-LED模块,并将红灯和绿灯分别连接到树莓派的GPIO引脚18和23上。