lc-smartX/lc/event.go

package lc

import (
	"github.com/jacobsa/go-serial/serial"
	"github.com/sirupsen/logrus"
	"lc-smartX/lc/model"
	"lc-smartX/util"
)

type Notifier interface {
	Notify()
}

func StartEventServer() {
	S = &Server{Radios: util.Config.Radios, Notifiers: make(map[string]Notifier, 4)}
	S.start()
}

var S *Server

type Server struct {
	Radios    []model.RadioInfo
	Notifiers map[string]Notifier //485通道名
}

func (s *Server) start() {
	for _, radio := range S.Radios {
		go OpenSerial(radio.Port)
	}
}

func RegisterCallback(branch byte, notifier Notifier) {
	for _, radio := range S.Radios {
		//关联主路led屏和支路雷达;关联支路led屏和主路雷达
		if branch == 0 && radio.Branch == 1 || branch == 1 && radio.Branch == 0 {
			S.Notifiers[radio.Port] = notifier
		}
	}
}

func (s *Server) Callback(port string) {
	notifier, ok := s.Notifiers[port]
	if !ok {
		logrus.Errorf("回调函数注册表没有该ip:%s", port)
		return
	}
	notifier.Notify()
}

func OpenSerial(portName string) {
	// 配置串口参数
	options := serial.OpenOptions{
		PortName:        portName, // /dev/ttymxc4 6 3
		BaudRate:        9600,
		DataBits:        8,
		StopBits:        1,
		MinimumReadSize: 4,
	}

	// 打开串口
	port, err := serial.Open(options)
	if err != nil {
		panic(err.Error())
	}

	// 关闭串口
	defer port.Close()
	for {
		// 读取数据
		buf := make([]byte, 128)
		n, err := port.Read(buf)
		if err != nil {
			break
		}
		if n < 8 {
			continue
		}
		result := false
		if buf[0] == 'x' && (buf[1] > '0' || buf[2] > '0' || buf[3] > '0') {
			result = true
		}
		if result {
			S.Callback(portName)
		}
	}
}