首先写个简单的python脚本
脚本很简单，就是通过控制树莓派上gpio让LED灯闪烁。
文件保存在/home/pi/script/ledblink.py
#!/usr/bin/env python
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(21,GPIO.OUT)
while True:
try:
GPIO.output(21,True)
time.sleep(1)
GPIO.output(21,False)
time.sleep(1)
except (KeyboardInterrupt, SystemExit):
GPIO.close()
print "exit"
开机启动脚本
保存脚本为/etc/init.d/ledblink文件
#!/bin/bash
# /etc/init.d/ledblink
### BEGIN INIT INFO
# Provides: embbnux
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: ledblink initscript
# Description: This service is used to manage a led
### END INIT INFO
case "$1" in
start)
echo "Starting LED Blink"
python /home/pi/script/ledblink.py &
;;
stop)
echo "Stopping ledblink"
# killall ledblink.py
kill $(ps aux | grep -m 1 'python /home/pi/script/ledblink.py' | awk '{ print $2 }')
;;
*)
echo "Usage: sudo /etc/init.d/ledblink start|stop"
exit 1
;;
esac
exit 0
设置python脚本开机启动
使用chmod命令让脚本可执行
sudo chmod +x /etc/init.d/ledblink
这样启动该脚本
# 启动
sudo /etc/init.d/ledblink start
# 停止
sudo /etc/init.d/ledblink stop
最后设置开机启动就好了
sudo update-rc.d ledblink defaults
去掉开机启动也很容易
sudo update-rc.d -f ledblink remove
这样就完工了,重启树莓派就会发现led自己闪烁了。