WhyCan Forum(哇酷开发者社区)

package main

import (
	"fmt"
	"os"
	"os/exec"
	"time"
)

const filename = "/sys/class/gpio/gpio131/value"

//调用shell写文件方式
func cmdRun(v byte) {
	command := "echo " + fmt.Sprintf("%d", v) + " > " + filename
	fmt.Println(command)
	cmd := exec.Command("/bin/sh", command)
	err := cmd.Run()
	if err != nil {
		fmt.Println(err)
	}
}

//os直接写文件方式
func osRun(v byte) {
	file, err := os.OpenFile(filename, os.O_WRONLY, 0666)
	if err != nil {
		fmt.Println(err)
		return
	}
	defer file.Close()

	_, err = file.WriteString(fmt.Sprintf("%d", v))
	if err != nil {
		fmt.Println(err)
	}
}

func pinSet(v byte) {
	// cmdRun(v)     暂时有问题，待调试
	osRun(v)
}

func main() {
	for {
		pinSet(1)
		time.Sleep(time.Second)
		pinSet(0)
		time.Sleep(time.Second)
	}
}