smart_tunnel_edge/service/serialmgr.go

package service

import (
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"github.com/tarm/serial"
	"log"
	"smart_tunnel_edge/util/config"
	"smart_tunnel_edge/util/logger"
	"strconv"
	"time"
)

var (
	parity = map[string]serial.Parity{
		"N": serial.ParityNone,  // 无校验
		"E": serial.ParityEven,  // 偶校验
		"O": serial.ParityOdd,   // 奇校验
		"M": serial.ParityMark,  // 标记校验
		"S": serial.ParitySpace, // 空格校验
	}
	serialPort = make(map[int8]*serial.Port)
	env        = make(map[string]int64) //存储环境传感器光照的切片
	opt        = make(map[string]int64) //存储光照传感器光照的切片
)

var (
	isLightOperate bool              // 标记是否进行开灯或调节亮度操作
	timer          *time.Timer       // 用于延时关闭灯的计时器
	lastCarTime    time.Time         // 记录上次来车的时间
	lightDuration  = 2 * time.Minute // 灯亮的持续时间（2分钟）
)

func GetSerialPort(serialID int8) (*serial.Port, error) {
	port, exists := serialPort[serialID]
	if !exists {
		return nil, errors.New("serial port not found")
	}
	return port, nil
}

func OpenSerialPort(portMap map[int8]*config.SerialPort) error {
	fmt.Println("打开串口...")
	var lastError error
	// 遍历串口配置
	for _, port := range portMap {
		// 串口配置
		c := &serial.Config{
			Name:        port.Address,
			Baud:        port.BaudRate,
			Size:        port.DataBits,
			StopBits:    serial.StopBits(port.StopBits),
			Parity:      parity[port.Parity],
			ReadTimeout: time.Duration(port.Timeout),
		}
		// 打开串口
		pt, err := serial.OpenPort(c)

		serialPort[port.Code] = pt

		if err != nil {
			logger.Logger.Errorf("无法打开串口 %s: %v", port.Address, err)
			if lastError == nil {
				lastError = err
			}
			continue
		}

		go listenPort(port.Code, pt) //开启线程监听串口
	}
	return lastError
}

func listenPort(portCode int8, port *serial.Port) {
	fmt.Println("监听串口...")
	buf := make([]byte, 512)
	for {
		// 读取数据
		n, err := port.Read(buf)
		if err != nil {
			log.Printf("读取串口数据失败: %v", err)
			return
		}
		if n > 0 {
			dataString := hex.EncodeToString(buf[:n])
			switch {
			case len(dataString) == 42 && dataString[2:6] == "0310": //环境传感器数据
				shiDu, _ := strconv.ParseInt(dataString[6:10], 16, 0)
				wenDu, _ := strconv.ParseInt(dataString[10:14], 16, 0)
				gz, _ := strconv.ParseInt(dataString[30:38], 16, 0)
				if _, exists := env[dataString[0:2]]; !exists {
					env[dataString[0:2]] = gz
				}

				data := EnvData{Temperature: float64(wenDu) / 10.0, Humidity: float64(shiDu) / 10.0, Illuminance: gz}
				for _, dev := range config.DevConfig.EnvDevs {
					if dev.Address == dataString[0:2] {
						data.Sn = dev.Sn
						break
					}
				}

				jsonData, _ := json.Marshal(data)
				topic := MqttService.GetTopic(TopicGatherDataEnv)
				err := MqttService.Publish(topic, jsonData)
				if err != nil {
					logger.Logger.Errorf("MQTT Publish err = %s", err.Error())
					continue
				}

			case len(dataString) == 14 && dataString[2:6] == "0302": //光照传感器数据
				gz, _ := strconv.ParseInt(dataString[6:10], 16, 0)

				if _, exists := env[dataString[0:2]]; !exists {
					opt[dataString[0:2]] = gz
				}

				data := OpticalData{Illuminance: gz}
				for _, dev := range config.DevConfig.EnvDevs {
					if dev.Address == dataString[0:2] {
						data.Sn = dev.Sn
						break
					}
				}

				jsonData, _ := json.Marshal(data)
				topic := MqttService.GetTopic(TopicGatherDataOpt)
				err := MqttService.Publish(topic, jsonData)
				if err != nil {
					logger.Logger.Errorf("MQTT Publish err = %s", err.Error())
					continue
				}

			case len(dataString) == 170 && dataString[2:6] == "0350": //电感数据
				totalPower, _ := strconv.ParseInt(dataString[42:50], 16, 0)
				data := InductanceData{TotalPower: totalPower}
				for _, dev := range config.DevConfig.EnvDevs {
					if dev.Address == dataString[0:2] {
						data.Sn = dev.Sn
						break
					}
				}

				jsonData, _ := json.Marshal(data)
				topic := MqttService.GetTopic(TopicGatherDataDG)
				err := MqttService.Publish(topic, jsonData)
				if err != nil {
					logger.Logger.Errorf("MQTT Publish err = %s", err.Error())
					continue
				}

			case len(dataString) == 16 && dataString[0:2] == "78" && dataString[8:16] == "40790d0a": //雷达数据
				dataBytes, _ := hex.DecodeString(dataString)
				speed, _ := strconv.Atoi(string(dataBytes)[1:4])
				// 配置实例
				policy := config.Instance().Policy
				if speed > 5 && policy.Id == 2 { // 速度大于5且策略为根据来车调光(2代表根据来车改变光照)
					now := time.Now() // 记录来车时间
					// 如果已经操作过灯
					if isLightOperate {
						// 如果在两分钟内再来车，延长计时
						if now.Sub(lastCarTime) <= lightDuration {
							timer.Reset(lightDuration)
						}
					} else {
						OperationLampSwitchJudge([]int8{portCode}, MediumLightLevel, MediumPower) //brightness代表亮度，way代表开关继电器回路数，turnOf代表开还是关，1代表开，0代表关
						isLightOperate = true
						timer = time.AfterFunc(lightDuration, func() {
							OperationLampSwitchJudge([]int8{portCode}, LowLightLevel, LowPower)
							isLightOperate = false
						})
					}
					// 更新最后来车时间
					lastCarTime = now
				}
				continue
				//default:
				//	// 其他情况可以处理默认数据
				//	fmt.Printf("错误数据: %s \n", dataString)
			}
			if config.Instance().Policy.Id == 1 && config.Instance().Nums.EnvNum == len(env) && config.Instance().Nums.OptNum == len(opt) {
				envAverage := calculateAverage(env)
				optAverage := calculateAverage(opt)

				if envAverage-optAverage >= 20000 { //如果相差20000Lux开两路或者调节亮度为90%
					OperationLampSwitchJudge([]int8{1, 2}, FullLightLevel, FullPower)
				} else if envAverage-optAverage >= 10000 { //如果相差10000Lux开两路或者调节亮度为60%
					OperationLampSwitchJudge([]int8{1, 2}, MediumLightLevel, MediumPower)
				} else {
					OperationLampSwitchJudge([]int8{1, 2}, LowLightLevel, LowPower)
				}

				env = make(map[string]int64)
				opt = make(map[string]int64)
			}
		}

		time.Sleep(100 * time.Millisecond) // 设置延迟，避免CPU占用过高
	}
}

func calculateAverage(data map[string]int64) float64 {
	var sum int64
	for _, value := range data {
		sum += value
	}
	if len(data) == 0 {
		return 0 // 防止除以零
	}
	return float64(sum) / float64(len(data))
}