biluz复位HCI接口

问题:树莓派做蓝牙主机 去连接从机时候 容易失败
连接失败 就重现开始扫描 在连接
希望在失败以后做一个复位蓝牙的动作

如何复位一次hci接口？
func Reset(adapterID string) error {
    err := Down(adapterID)
    if err != nil {
        log.Warnf("Down failed: %s", err)
    }
    return Up(adapterID)
}
怎么找到的？
\muka\hw\linux\linux.go
\muka\examples\hci_updown\hci_updown.go
在tigo全局找 hci 都是.H文件里面才有 
所以根本就没有使用！
那还是自己去搬运吧

log "github.com/sirupsen/logrus"
log.Warnf("Down failed: %s", err)

方式1 台湾

func parse_MAC(result bluetooth.ScanResult) string {
    mac := ""
    str := strings.Split(result.Address.String(), ":")
    for _, s := range str {
        mac += s
    }
    return mac
}
func hci_disconnect(result bluetooth.ScanResult) {
    cmd := exec.Command("hcitool", "con")
    stdout, err := cmd.Output()
    if err != nil {
        log.Printf("[BLE][%s] Use hcitool to disconnect ble: %v\r\n", parse_MAC(result), err)
        return
    }
    log.Printf("[BLE][%s] hcitool raw output:%s\r\n", parse_MAC(result), stdout)
    index := strings.Index(string(stdout), strings.ToUpper(result.Address.String()))
    if index == -1 {
        log.Printf("[BLE][%s] BLE already disconnected\r\n", parse_MAC(result))
        return
    }
    cmd_out := string(stdout)[index:]
    log.Printf("[BLE][%s] hcitool con output : %s\r\n", parse_MAC(result), cmd_out)
    s_format := strings.ToUpper(result.Address.String()) + " handle %d %s"
    // log.Printf("[BLE][%s] sscanf format : %s\r\n", parse_MAC(result), s_format)
    var handle int
    var temp string
    fmt.Sscanf(cmd_out, s_format, &handle, &temp)
    log.Printf("[BLE][%s] hcitool ledc %d\r\n", parse_MAC(result), handle)
    cmd = exec.Command("hcitool", "ledc", fmt.Sprint(handle))
    cmd.Output()
}

方式2
用源码 example修改一下
 

package main

import (
	"fmt"
	"strconv"
	"strings"
	"time"

	"github.com/muka/go-bluetooth/hw/linux/hci"
	log "github.com/sirupsen/logrus"
)

//HciUpDownExample hciconfig up / down
func Run(rawAdapterID string) error {

	log.Info("Turn down")

	adapterID, err := strconv.Atoi(strings.Replace(rawAdapterID, "hci", "", 1))
	if err != nil {
		return err
	}

	err = hci.Down(adapterID)
	if err != nil {
		return fmt.Errorf("Failed to stop device hci%d: %s", adapterID, err.Error())
	}

	time.Sleep(time.Second * 5) //此时终端hciconfig去看hci0的状态显示是down
	log.Info("Turn on")
	err = hci.Up(adapterID)
	if err != nil {
		return fmt.Errorf("Failed to start device hci%d: %s", adapterID, err.Error())
	}

	log.Info("Done.")

	return nil
}

func main() {
	Run("hci0")
	for {
	}
}