jiateng_ws/utils/serial_manager.py

import serial
import threading
import time
import logging
import os
import json
from typing import Dict, Optional, Callable
from utils.config_loader import ConfigLoader
from utils.keyboard_listener import KeyboardListener
from pynput.keyboard import Key
import re
import platform

class SerialManager:
    """串口管理器，单例模式"""
    _instance = None
    _lock = threading.Lock()
    
    def __new__(cls):
        with cls._lock:
            if cls._instance is None:
                cls._instance = super(SerialManager, cls).__new__(cls)
                cls._instance._initialized = False
        return cls._instance
        
    def __init__(self):
        if self._initialized:
            return
            
        self._initialized = True
        self.serial_ports: Dict[str, serial.Serial] = {}  # 存储打开的串口对象
        self.read_threads: Dict[str, threading.Thread] = {}  # 存储读取线程
        self.running_flags: Dict[str, bool] = {}  # 存储线程运行标志
        self.callbacks: Dict[str, Callable] = {}  # 存储数据回调函数
        self.port_types: Dict[str, str] = {}  # 存储端口类型，用于线程重启
        
        # 添加文件操作暂停控制
        self._file_operations_suspended = False
        self._file_operations_lock = threading.Lock()
        
        # 添加称重稳定性检测变量
        self.last_weight = 0
        self.stable_count = 0
        self.weight_written = False  # 初始化为False，确保首次称重能够正确处理
        
        # 添加抗抖动变量
        self.last_weights = [0] * 3  # 存储最近3个重量值
        self.weight_changed_time = time.time()  # 上次重量变化的时间
        self.last_write_time = 0  # 最后写入时间
        
        # 稳定性时间跟踪
        self.stability_start_time = 0  # 开始检测稳定性的时间
        
        # 数据存储
        self.data = {
            'mdz': 0,
            'xj': 0,  # 添加线径数据
            'cz': 0,
            'scanner': ''  # 添加扫码器数据
        }
        
        # 是否自动查询米电阻数据，默认为False，只通过PageUp键触发
        self.auto_query_mdz = False
        
        # 是否自动查询线径数据，默认为True，开启自动查询
        self.auto_query_xj = True
        
        logging.info("初始化 SerialManager")
        
        # 加载配置
        self._load_config()
        
        # 检查是否启用键盘监听功能
        enable_keyboard_listener = self.config.get_value('app.features.enable_keyboard_listener', False)
        if enable_keyboard_listener:
            try:
                # 初始化键盘监听器
                self.keyboard_listener = KeyboardListener()
                
                # 从配置中获取米电阻触发键
                trigger_key = self.config.get_value('serial.keyboard.trigger_key', 'Key.page_up')
                # 注册米电阻触发键回调
                self.keyboard_listener.register_callback(trigger_key, self.trigger_resistance_query)
                logging.info(f"已注册{trigger_key}按键回调用于触发米电阻查询")
                
                # 注意：不在这里启动键盘监听器，而是在点击"开始"按钮时启动
            except Exception as e:
                logging.error(f"初始化键盘监听器失败: {e}")
                # 创建一个空的键盘监听器对象，以避免后续代码出现NoneType错误
                self.keyboard_listener = None
        else:
            logging.info("键盘监听功能已在配置中禁用，跳过初始化键盘监听器")
            self.keyboard_listener = None
            
        # 启动线程监控
        self._start_thread_monitor()
        
    def _load_config(self):
        """加载配置"""
        try:
            config_loader = ConfigLoader.get_instance() # Renamed for clarity
            self.config = config_loader # Assign the whole config object
            
            # 获取数据文件路径
            self.data_file = self.config.get_value('serial.data_file', 'data.txt')
            # 确保是绝对路径
            if not os.path.isabs(self.data_file):
                self.data_file = os.path.abspath(self.data_file)
            logging.info(f"最终确定的 data_file 绝对路径: {self.data_file}")
            
            # 获取串口配置
            self.mdz_config = self.config.get_config('mdz')
            self.cz_config = self.config.get_config('cz')
            self.xj_config = self.config.get_config('xj')  # 添加线径配置
            self.scanner_config = self.config.get_config('scanner')  # 添加扫码器配置
            
            # 检查操作系统类型，在macOS上处理COM端口名称问题
            os_type = platform.system()
            if os_type == "Darwin":
                # 检查是否需要自动检测macOS上的串口
                macos_autodetect = self.config.get_value('serial.os_config.macos_autodetect', False)
                if macos_autodetect:
                    logging.info("在macOS上启用了串口自动检测")
                    self._detect_macos_ports()
            
            # 获取默认的稳定阈值
            self.stable_threshold = self.cz_config.get('stable_threshold', 10) if self.cz_config else 10
            
            # 检查是否自动查询米电阻数据
            self.auto_query_mdz = self.config.get_value('serial.mdz.auto_query', False)
            
            # 检查是否自动查询线径数据
            self.auto_query_xj = self.config.get_value('serial.xj.auto_query', True)  # 默认为True，确保线径自动查询开启
            
            logging.info(f"已加载串口配置：mdz={self.mdz_config}, xj={self.xj_config}, cz={self.cz_config}, scanner={self.scanner_config}, data_file={self.data_file}")
            logging.info(f"米电阻自动查询: {'开启' if self.auto_query_mdz else '关闭'}")
            logging.info(f"线径自动查询: {'开启' if self.auto_query_xj else '关闭'}")
        except Exception as e:
            logging.error(f"加载配置出错: {e}")
            # 设置默认值
            self.data_file = os.path.abspath('data.txt')
            self.mdz_config = {'port': 9600, 'ser': 'COM5'}
            self.cz_config = {'port': 9600, 'ser': 'COM2', 'stable_threshold': 10}
            self.xj_config = {'port': 9600, 'ser': 'COM3'}
            self.scanner_config = {'port': 9600, 'ser': 'COM4'}
            self.stable_threshold = 10
            self.auto_query_mdz = False
            self.auto_query_xj = True  # 默认为True，确保线径自动查询开启
            logging.info(f"使用默认配置，数据文件: {self.data_file}")
        
    def _detect_macos_ports(self):
        """在macOS上检测可用的串口"""
        try:
            if platform.system() != "Darwin":
                logging.info("不是macOS系统，跳过串口检测")
                return
                
            logging.info("正在检测macOS可用串口...")
            
            # 检查/dev目录下的tty.*和cu.*设备
            import glob
            tty_ports = glob.glob('/dev/tty.*')
            cu_ports = glob.glob('/dev/cu.*')
            all_ports = tty_ports + cu_ports
            
            if not all_ports:
                logging.warning("未检测到macOS上的串口设备")
                return
                
            logging.info(f"检测到以下串口设备: {all_ports}")
            
            # 如果mdz_config中的串口是COM格式，尝试替换为检测到的第一个串口
            if self.mdz_config and 'ser' in self.mdz_config and self.mdz_config['ser'].startswith('COM'):
                # 优先选择包含"usb"的设备
                usb_ports = [port for port in all_ports if 'usb' in port.lower()]
                if usb_ports:
                    self.mdz_config['ser'] = usb_ports[0]
                    logging.info(f"自动将米电阻串口从COM格式替换为: {usb_ports[0]}")
                elif all_ports:
                    self.mdz_config['ser'] = all_ports[0]
                    logging.info(f"自动将米电阻串口从COM格式替换为: {all_ports[0]}")
            
            # 如果cz_config中的串口是COM格式，尝试替换为检测到的第二个串口
            if self.cz_config and 'ser' in self.cz_config and self.cz_config['ser'].startswith('COM'):
                # 优先选择包含"usb"的设备，并且不是已分配给mdz的设备
                usb_ports = [port for port in all_ports if 'usb' in port.lower() 
                            and (not self.mdz_config or port != self.mdz_config.get('ser'))]
                if usb_ports:
                    self.cz_config['ser'] = usb_ports[0]
                    logging.info(f"自动将线径串口从COM格式替换为: {usb_ports[0]}")
                elif len(all_ports) > 1:
                    # 选择不是mdz_config已使用的第一个端口
                    for port in all_ports:
                        if not self.mdz_config or port != self.mdz_config.get('ser'):
                            self.cz_config['ser'] = port
                            logging.info(f"自动将线径串口从COM格式替换为: {port}")
                            break
                elif all_ports and (not self.mdz_config or all_ports[0] != self.mdz_config.get('ser')):
                    self.cz_config['ser'] = all_ports[0]
                    logging.info(f"自动将线径串口从COM格式替换为: {all_ports[0]}")
                    
        except Exception as e:
            logging.error(f"检测macOS串口时发生错误: {e}")
            logging.info("将继续使用配置文件中的串口设置")
        
    def open_port(self, port_name: str, port_type: str, baud_rate: Optional[int] = None, 
                  data_bits: int = 8, stop_bits: int = 1, 
                  parity: str = 'N', timeout: float = 1.0,
                  callback: Optional[Callable] = None) -> bool:
        """
        打开串口
        
        Args:
            port_name: 串口名称，如COM1
            port_type: 串口类型，'cz'表示称重，'mdz'表示米电阻, 'xj'表示线径, 'scanner'表示扫码器
            baud_rate: 波特率，如果为None则从配置文件读取
            data_bits: 数据位
            stop_bits: 停止位
            parity: 校验位，'N'表示无校验，'O'表示奇校验，'E'表示偶校验
            timeout: 超时时间，单位秒
            callback: 回调函数，接收(port_name, data)作为参数
            
        Returns:
            bool: 成功返回True，失败返回False
        """
        # 如果串口已经打开，先关闭
        if port_name in self.serial_ports and self.serial_ports[port_name]:
            try:
                self.close_port(port_name)
            except Exception as e:
                logging.error(f"关闭已打开的串口失败: {e}")
        
        # 配置串口参数
        try:
            # 从配置读取波特率（如果未提供）
            if baud_rate is None:
                if port_type == 'cz' and self.cz_config:
                    baud_rate = self.cz_config.get('port', 9600)
                elif port_type == 'mdz' and self.mdz_config:
                    baud_rate = self.mdz_config.get('port', 9600)
                elif port_type == 'xj' and self.xj_config:
                    baud_rate = self.xj_config.get('port', 9600)
                elif port_type == 'scanner' and self.scanner_config:
                    baud_rate = self.scanner_config.get('port', 9600)
                else:
                    baud_rate = 9600  # 默认波特率
            
            # 转换校验位为PySerial常量
            if parity.upper() == 'N':
                parity_constant = serial.PARITY_NONE
            elif parity.upper() == 'O':
                parity_constant = serial.PARITY_ODD
            elif parity.upper() == 'E':
                parity_constant = serial.PARITY_EVEN
            else:
                parity_constant = serial.PARITY_NONE
                
            # 打开串口
            self.serial_ports[port_name] = serial.Serial(
                port=port_name,
                baudrate=baud_rate,
                bytesize=data_bits,
                stopbits=stop_bits,
                parity=parity_constant,
                timeout=timeout
            )
            
            logging.info(f"打开串口成功: {port_name}, 类型: {port_type}, 波特率: {baud_rate}")
            
            # 设置回调
            if callback:
                self.callbacks[port_name] = callback
                
            # 记录端口类型，用于线程重启
            self.port_types[port_name] = port_type
                
            # 创建并启动读取线程
            self.running_flags[port_name] = True
            
            # 统一线程创建和管理方式
            if port_type == 'cz':
                # 称重数据需要特殊处理
                thread = threading.Thread(
                    target=self._read_weight_thread, 
                    args=(port_name, self.stable_threshold),
                    daemon=True,
                    name=f"Thread-{port_type}-{port_name}"
                )
            elif port_type == 'mdz':
                # 米电阻数据需要特殊处理
                thread = threading.Thread(
                    target=self._read_resistance_thread, 
                    args=(port_name,),
                    daemon=True,
                    name=f"Thread-{port_type}-{port_name}"
                )
            elif port_type == 'xj':
                # 线径数据需要特殊处理
                thread = threading.Thread(
                    target=self._read_diameter_thread, 
                    args=(port_name,),
                    daemon=True,
                    name=f"Thread-{port_type}-{port_name}"
                )
            elif port_type == 'scanner':
                # 扫码器数据需要特殊处理
                thread = threading.Thread(
                    target=self._read_scanner_thread, 
                    args=(port_name,),
                    daemon=True,
                    name=f"Thread-{port_type}-{port_name}"
                )
            else:
                # 其他类型使用通用处理
                thread = threading.Thread(
                    target=self._read_thread, 
                    args=(port_name,),
                    daemon=True,
                    name=f"Thread-{port_type}-{port_name}"
                )
            
            # 统一启动线程
            thread.start()
            self.read_threads[port_name] = thread
            logging.info(f"已启动串口读取线程: {thread.name}")
            
            return True
            
        except Exception as e:
            logging.error(f"打开串口失败: {port_name}, 错误: {e}")
            # 确保清理好资源
            if port_name in self.serial_ports:
                try:
                    self.serial_ports[port_name].close()
                except:
                    pass
                self.serial_ports.pop(port_name, None)
            
            # 停止相关线程
            self.running_flags[port_name] = False
            if port_name in self.read_threads:
                self.read_threads.pop(port_name, None)
                
            return False
            
    def close_port(self, port_name: str) -> bool:
        """
        关闭串口
        
        Args:
            port_name: 串口名称
            
        Returns:
            是否成功关闭
        """
        try:
            # 停止读取线程
            if port_name in self.running_flags:
                self.running_flags[port_name] = False
                
            # 等待线程结束
            if port_name in self.read_threads:
                if self.read_threads[port_name].is_alive():
                    self.read_threads[port_name].join(1.0)  # 最多等待1秒
                del self.read_threads[port_name]
                
            # 关闭串口
            if port_name in self.serial_ports:
                if self.serial_ports[port_name].is_open:
                    self.serial_ports[port_name].close()
                del self.serial_ports[port_name]
                logging.info(f"串行对象 for {port_name} 从 self.serial_ports 中删除. 当前活跃端口: {list(self.serial_ports.keys())}")
                
            # 删除回调和端口类型记录
            if port_name in self.callbacks:
                del self.callbacks[port_name]
                
            if port_name in self.port_types:
                del self.port_types[port_name]
                
            logging.info(f"串口 {port_name} 已关闭")
            return True
            
        except Exception as e:
            logging.error(f"关闭串口 {port_name} 失败: {str(e)}")
            return False
            
    def is_port_open(self, port_name: str) -> bool:
        """
        检查串口是否打开
        
        Args:
            port_name: 串口名称
            
        Returns:
            是否打开
        """
        return port_name in self.serial_ports and self.serial_ports[port_name].is_open
        
    def write_data(self, port_name: str, data: bytes) -> bool:
        """
        向串口写入数据
        
        Args:
            port_name: 串口名称
            data: 要写入的数据
            
        Returns:
            是否成功写入
        """
        try:
            if not self.is_port_open(port_name):
                return False
                
            self.serial_ports[port_name].write(data)
            return True
            
        except Exception as e:
            logging.error(f"向串口 {port_name} 写入数据失败: {str(e)}")
            return False
    
    def read_data(self, port_name: str, size: int = None) -> bytes:
        """
        从串口读取数据
        
        Args:
            port_name: 串口名称
            size: 要读取的字节数，如果为None则读取所有可用数据
            
        Returns:
            读取的数据，如果失败则返回空字节
        """
        try:
            if not self.is_port_open(port_name):
                logging.error(f"尝试从未打开的串口 {port_name} 读取数据")
                return b''
                
            if size is None:
                # 读取所有可用数据
                if self.serial_ports[port_name].in_waiting > 0:
                    return self.serial_ports[port_name].read(self.serial_ports[port_name].in_waiting)
                return b''
            else:
                # 读取指定数量的字节
                return self.serial_ports[port_name].read(size)
                
        except Exception as e:
            logging.error(f"从串口 {port_name} 读取数据失败: {str(e)}")
            return b''
    
    def _read_thread(self, port_name: str):
        """
        串口读取线程
        
        Args:
            port_name: 串口名称
        """
        try:
            while self.running_flags.get(port_name, False):
                if not self.is_port_open(port_name):
                    time.sleep(0.1)
                    continue
                    
                # 读取数据
                if self.serial_ports[port_name].in_waiting:
                    data = self.serial_ports[port_name].readline()
                    
                    # 调用回调函数
                    if port_name in self.callbacks and data:
                        try:
                            self.callbacks[port_name](port_name, data)
                        except Exception as e:
                            logging.error(f"调用串口 {port_name} 回调函数失败: {str(e)}")
                            
                time.sleep(0.01)  # 短暂休眠，避免CPU占用过高
                
        except Exception as e:
            logging.error(f"串口 {port_name} 读取线程异常: {str(e)}")
    
    def _read_weight_thread(self, port_name: str, stable_threshold: int = 10):
        """
        称重串口读取线程
        
        Args:
            port_name: 串口名称
            stable_threshold: 稳定阈值
        """
        try:
            logging.info(f"[{port_name}] 称重线程启动")
            # 重置状态变量，确保线程重启时能正确处理称重数据
            self.weight_written = False
            self.stable_count = 0
            self.last_weight = 0
            self.last_weights = [0] * 3
            self.weight_changed_time = time.time()
            self.last_write_time = 0  # 添加一个变量来跟踪最后一次写入时间
            self.stability_start_time = 0  # 重置稳定性检测开始时间
            
            # 添加实际的读取逻辑
            while self.running_flags.get(port_name, False):
                if not self.is_port_open(port_name):
                    time.sleep(0.1)
                    continue
                
                # 检查是否有数据可读
                if self.serial_ports[port_name].in_waiting > 0:
                    data = self.serial_ports[port_name].read(self.serial_ports[port_name].in_waiting)
                    weight = self._process_weight_data(data)
                    if weight is not None:
                        # 更新数据
                        self.data['cz'] = weight
                        self._write_data_to_file()
                
                time.sleep(0.1)
                
        except Exception as e:
            logging.error(f"称重串口 {port_name} 读取线程异常: {e}")
            # 线程异常时，尝试重置状态
            self.running_flags[port_name] = False
    
    def _process_weight_data(self, data_bytes):
        """
        TODO: 需要将线径数据写入文件，这个方法需要修改成线径的串口数据获取

        Args:
            data_bytes: 原始字节数据
            
        Returns:
            解析后的重量值或None
        """
        try:
            # 尝试多种编码方式解析
            weight = None
            
            # 记录原始数据以便调试
            logging.debug(f"称重原始数据: {data_bytes.hex()}")
            
            # 方法1: 尝试ASCII解码
            try:
                ascii_str = data_bytes.decode('ascii', errors='replace')
                # 仅提取数字部分
                import re
                numbers = re.findall(r'\d+', ascii_str)
                if numbers:
                    weight = float(numbers[0]) / 10.0
                    logging.debug(f"ASCII解码成功: {weight}")
            except Exception as e:
                logging.debug(f"ASCII解码失败: {e}")
            
            # 方法2: 尝试直接从二进制解析 (根据具体协议)
            if weight is None and len(data_bytes) >= 8:
                try:
                    # 假设重量在特定位置，具体需根据实际协议调整
                    weight_bytes = data_bytes[2:6]
                    weight = int.from_bytes(weight_bytes, byteorder='big') / 10.0
                    logging.debug(f"二进制解码成功: {weight}")
                except Exception as e:
                    logging.debug(f"二进制解码失败: {e}")
            
            return weight
        except Exception as e:
            logging.error(f"处理称重数据失败: {e}")
            return None
    
    def _read_resistance_thread(self, port_name: str):
        """
        米电阻串口读取线程
        
        Args:
            port_name: 串口名称
        """
        try:
            logging.info(f"[{port_name}] 米电阻线程启动")
            while self.running_flags.get(port_name, False):
                if not self.is_port_open(port_name):
                    time.sleep(0.1)
                    continue
                
                # 如果不是自动查询模式，则只监听串口数据而不主动发送查询
                if not self.auto_query_mdz:
                    # 检查是否有数据可读
                    if self.serial_ports[port_name].in_waiting > 0:
                        response = self.serial_ports[port_name].read(self.serial_ports[port_name].in_waiting)
                        self._process_mdz_response(port_name, response)
                    
                    time.sleep(0.1)
                    continue
                
                # 以下代码只在自动查询模式下执行
                try:
                    # 发送查询指令
                    hex_data = '01 03 00 01 00 07 55 C8'
                    byte_data = bytes.fromhex(hex_data.replace(' ', ''))
                    self.serial_ports[port_name].write(byte_data)
                    
                    # 等待响应
                    time.sleep(1)
                    
                    if self.serial_ports[port_name].in_waiting > 0:
                        response = self.serial_ports[port_name].read(self.serial_ports[port_name].in_waiting)
                        self._process_mdz_response(port_name, response)
                    
                except Exception as e:
                    logging.error(f"米电阻数据处理异常: {e}")
                
                # 每5秒查询一次
                for i in range(50):
                    if not self.running_flags.get(port_name, False):
                        break
                    time.sleep(0.1)
                
        except Exception as e:
            logging.error(f"米电阻串口 {port_name} 读取线程异常: {e}")
            # 线程异常时，尝试重置状态
            self.running_flags[port_name] = False
    
    def _process_mdz_response(self, port_name, response_bytes: bytes):
        """处理米电阻响应数据"""
        try:
            if response_bytes:  # 确保有响应数据
                try:
                    # 转换为字符串用于日志记录
                    response_str = str(response_bytes)
                    logging.warning(f"[{port_name}] 米电阻数据: {response_str}")
                    
                    # 使用正则表达式直接提取数字
                    # 查找格式为11.58201这样的浮点数
                    match = re.search(r'(\d+\.\d+)', response_str)
                    if match:
                        number_str = match.group(1)
                        try:
                        # 转换为浮点数
                            mdz_value = float(number_str)
                            logging.info(f"米电阻数据: {mdz_value}")
                            
                            # 更新数据
                            self.data['mdz'] = mdz_value
                            self._write_data_to_file()
                            self._notify_callbacks('mdz_data', {"type": "mdz", "value": self.data['mdz'], "source": f"serial ({port_name})"})
                            return True
                        except ValueError:
                            logging.warning(f"米电阻数据字符串 '{number_str}' 无法转换为浮点数")
                    else:
                        logging.warning(f"米电阻数据中未找到有效的浮点数")
                except Exception as e:
                    logging.error(f"处理米电阻数据异常: {e}")
            else:
                logging.warning("米电阻响应数据为空")
            
            # 如果无法解析，则不再使用模拟数据，直接返回失败
            return False
            
        except Exception as e:
            logging.error(f"米电阻数据处理关键异常: {e}")
            return False

    def _write_data_to_file(self):
        """将数据写入文件"""
        try:
            # 检查文件操作是否已暂停
            with self._file_operations_lock:
                if self._file_operations_suspended:
                    logging.info("文件操作已暂停，跳过写入")
                    return
            
            # 构建数据字符串
            data_str = f"mdz:{self.data['mdz']}|cz:{self.data['cz']}|scanner:{self.data['scanner']}|"
            
            # 确保目录存在
            data_dir = os.path.dirname(self.data_file)
            if data_dir and not os.path.exists(data_dir):
                logging.info(f"创建目录: {data_dir}")
                os.makedirs(data_dir, exist_ok=True)
            
            # 写入文件 - 使用临时文件写入然后重命名，避免文件锁定问题
            # 创建临时文件
            temp_file = f"{self.data_file}.tmp"
            try:
                with open(temp_file, 'w', encoding='utf-8') as f:
                    f.write(data_str)
                    f.flush()
                    os.fsync(f.fileno())  # 确保数据写入磁盘
                
                # 再次检查文件操作是否已暂停
                with self._file_operations_lock:
                    if self._file_operations_suspended:
                        logging.info("文件操作已暂停，已写入临时文件但取消重命名操作")
                        return
                
                # 原子性地重命名文件，替换原有文件（在大多数操作系统上是原子操作）
                if os.path.exists(self.data_file):
                    try:
                        os.remove(self.data_file)
                    except Exception as e:
                        logging.warning(f"无法删除旧数据文件: {e}, 尝试直接覆盖")
                
                os.rename(temp_file, self.data_file)
                logging.info(f"数据已写入文件: {self.data_file}")
            except Exception as e:
                logging.error(f"写入临时文件失败: {e}")
                # 清理临时文件
                if os.path.exists(temp_file):
                    try:
                        os.remove(temp_file)
                    except:
                        pass
                raise  # 重新抛出异常
                
        except Exception as e:
            logging.error(f"写入数据文件失败: {e}, 文件路径: {self.data_file}")
    
    def get_current_data(self):
        """获取当前数据"""
        return self.data.copy()
    
    def close_all_ports(self):
        """关闭所有串口"""
        port_names = list(self.serial_ports.keys())
        for port_name in port_names:
            self.close_port(port_name)
            
    def reload_config(self):
        """重新加载配置"""
        self._load_config()
        logging.info("已重新加载串口配置")
    
    def start_keyboard_listener(self):
        """启动键盘监听"""
        try:
            # 检查键盘监听器是否已初始化
            if self.keyboard_listener is None:
                logging.warning("键盘监听器未初始化，无法启动")
                return False
                
            # 从配置中获取米电阻触发键
            trigger_key = self.config.get_value('serial.keyboard.trigger_key', 'Key.page_up')
            # 不再获取线径触发键
            
            # 确保已注册米电阻触发键回调
            if trigger_key not in self.keyboard_listener.callbacks:
                self.keyboard_listener.register_callback(trigger_key, self.trigger_resistance_query)
                logging.info(f"已注册{trigger_key}按键回调用于触发米电阻数据查询")
            
            # 移除线径触发键回调注册代码
            
            # 启动键盘监听
            result = self.keyboard_listener.start()
            if result:
                logging.info(f"已启动键盘监听，按 {trigger_key} 键可触发米电阻数据查询")
                
                # 检查监听器状态
                if self.keyboard_listener.is_active():
                    logging.info("键盘监听器处于活动状态")
                else:
                    logging.warning("键盘监听器启动完成，但状态检查显示不活动")
            else:
                logging.error("启动键盘监听失败")
            return result
        except Exception as e:
            logging.error(f"启动键盘监听失败: {e}")
            return False
            
    def stop_keyboard_listener(self, join_thread=False):
        """停止键盘监听
        
        Args:
            join_thread: 是否等待键盘监听线程结束
        """
        try:
            # 检查键盘监听器是否已初始化
            if self.keyboard_listener is None:
                logging.info("键盘监听器未初始化，无需停止")
                return
                
            self.keyboard_listener.stop()
            logging.info("已停止键盘监听")
            
            # 如果需要等待线程结束
            if join_thread:
                try:
                    self.keyboard_listener.join(timeout=1.0)  # 最多等待1秒
                except Exception as e:
                    logging.error(f"等待键盘监听线程结束时出错: {e}")
        except Exception as e:
            logging.error(f"停止键盘监听失败: {e}")
    
    def register_callback(self, key, callback):
        """
        注册数据回调函数
        
        Args:
            key: 回调标识，如 'mdz_data'
            callback: 回调函数，参数为 (port_name, data)
        """
        try:
            if key in self.callbacks:
                logging.warning(f"覆盖已存在的回调函数: {key}")
            self.callbacks[key] = callback
            logging.info(f"已注册回调函数: {key}, 回调对象类型: {callback.__self__.__class__.__name__}")
        except Exception as e:
            logging.error(f"注册回调失败: {e}")
            
    def trigger_resistance_query(self):
        """触发米电阻查询"""
        try:
            # 检查米电阻配置是否存在
            if not self.mdz_config:
                logging.warning("未找到米电阻配置，无法触发查询")
                return False
            
            # 检查米电阻串口是否已打开
            ser_name = self.mdz_config.get('ser')
            if not ser_name or not self.is_port_open(ser_name):
                logging.warning(f"米电阻串口 {ser_name} 未打开，无法触发查询")
                return False
            
            # 从配置获取查询命令，如果没有则使用默认命令
            query_cmd = self.mdz_config.get('query_cmd', '01 03 00 01 00 07 55 C8')

            # 转换为字节数据
            try:
                byte_data = bytes.fromhex(query_cmd.replace(' ', ''))
            except ValueError as e:
                logging.error(f"米电阻查询命令格式错误: {query_cmd}, 错误: {e}")
                return False
                
            # 发送查询命令
            result = self.write_data(ser_name, byte_data)
            if result:
                logging.info(f"已向米电阻串口 {ser_name} 发送查询命令: {query_cmd}")
                
                # 特殊情况：如果触发了查询，但串口没有响应，尝试模拟一个合理的响应
                # 这里我们先等待一段时间，让设备有机会响应
                time.sleep(0.5)
                
                # 如果没有数据可读，或者读取的数据不包含有效的米电阻值
                if self.serial_ports[ser_name].in_waiting == 0:
                    logging.warning("米电阻串口未返回数据，检查设备连接")
                    
                # 在这里我们不再自动提供模拟数据，而是由用户决定是否重试
                return True
            else:
                logging.error(f"向米电阻串口 {ser_name} 发送查询命令失败")
                return False
                
        except Exception as e:
            logging.error(f"触发米电阻查询时出错: {e}")
            return False

    def _notify_callbacks(self, port_name, value):
        """通知所有相关回调函数"""
        try:
            # 端口特定回调 (通常用于原始串口数据)
            if port_name in self.callbacks and port_name not in ['mdz_data', 'xj_data', 'scanner_data']: # 避免重复处理
                try:
                    # 假设这种回调期望原始的 value (可能是字节串，也可能是其他类型)
                    self.callbacks[port_name](port_name, value)
                    logging.debug(f"Notified port-specific callback for {port_name}")
                except Exception as e:
                    logging.error(f"调用端口回调 {port_name} 失败: {e}")
            
            # 全局回调, 特别处理 'mdz_data'
            if 'mdz_data' in self.callbacks and port_name == 'mdz_data':
                actual_mdz_numeric_value = None
                source_info = "unknown"

                if isinstance(value, dict):
                    actual_mdz_numeric_value = value.get('value')
                    source_info = value.get('source', source_info)
                elif isinstance(value, (str, float, int)):
                    # 如果直接传递了数值 (例如来自旧的 _use_mock_data)
                    actual_mdz_numeric_value = str(value) 
                else:
                    # 尝试从可能是字节串的value中解码 (不太可能走到这里了，因为上游会处理好)
                    try:
                        decoded_value = value.decode('utf-8')
                        if "米电阻数据:" in decoded_value:
                            actual_mdz_numeric_value = decoded_value.split("米电阻数据:")[1].strip()
                        else:
                            actual_mdz_numeric_value = decoded_value # best guess
                    except: # noqa
                        pass # 无法解码或解析，保持 None

                if actual_mdz_numeric_value is not None:
                    # 构建 PackageInboundDialog.on_mdz_data_received 期望的格式
                    callback_data_str = f"米电阻数据: {actual_mdz_numeric_value}"
                    try:
                        # port_name 对于 mdz_data 回调，可以传递触发源的串口名，或者一个通用标识
                        # trigger_resistance_query 知道 mdz_port_name，它应该作为 port_name 传给 _notify_callbacks
                        # 如果是从模拟数据来，port_name 可能是 'mdz' 或 'mock'
                        triggering_port = port_name if port_name not in ['mdz_data', 'mdz'] else self.mdz_config.get('ser', 'N/A') if self.mdz_config else 'N/A'
                        if source_info.startswith("mock"): # 如果源是模拟数据
                            triggering_port = f"mock_{port_name}" # e.g. mock_mdz
                        
                        self.callbacks['mdz_data'](triggering_port, callback_data_str.encode('utf-8'))
                        logging.info(f"通知 'mdz_data' 回调. 值: {actual_mdz_numeric_value}, 源: {source_info}, 触发源端口: {triggering_port}")
                    except Exception as e:
                        logging.error(f"调用全局回调 'mdz_data' 失败: {e}", exc_info=True)
                else:
                    logging.warning(f"回调失败:  mdz_data 中 实际值为None. 初始 value: {value}")
            
            # 全局回调, 特别处理 'xj_data'
            if 'xj_data' in self.callbacks and port_name == 'xj_data':
                actual_xj_numeric_value = None
                source_info = "unknown"

                if isinstance(value, dict):
                    actual_xj_numeric_value = value.get('value')
                    source_info = value.get('source', source_info)
                elif isinstance(value, (str, float, int)):
                    actual_xj_numeric_value = str(value) 
                else:
                    try:
                        decoded_value = value.decode('utf-8')
                        if "线径数据:" in decoded_value:
                            actual_xj_numeric_value = decoded_value.split("线径数据:")[1].strip()
                        else:
                            actual_xj_numeric_value = decoded_value # best guess
                    except: # noqa
                        pass # 无法解码或解析，保持 None

                if actual_xj_numeric_value is not None:
                    callback_data_str = f"线径数据: {actual_xj_numeric_value}"
                    try:
                        triggering_port = port_name if port_name not in ['xj_data', 'xj'] else self.xj_config.get('ser', 'N/A') if self.xj_config else 'N/A'
                        if source_info.startswith("mock"):
                            triggering_port = f"mock_{port_name}"
                        
                        self.callbacks['xj_data'](triggering_port, callback_data_str.encode('utf-8'))
                        logging.info(f"通知 'xj_data' 回调. 值: {actual_xj_numeric_value}, 源: {source_info}, 触发源端口: {triggering_port}")
                    except Exception as e:
                        logging.error(f"调用全局回调 'xj_data' 失败: {e}", exc_info=True)
                else:
                    logging.warning(f"回调失败: xj_data 中实际值为None. 初始 value: {value}")

            # 全局回调, 特别处理 'scanner_data'
            if 'scanner_data' in self.callbacks and port_name == 'scanner_data':
                actual_scanner_value = None
                source_info = "unknown"

                if isinstance(value, dict):
                    actual_scanner_value = value.get('value')
                    source_info = value.get('source', source_info)
                elif isinstance(value, (str, bytes)):
                    if isinstance(value, bytes):
                        try:
                            actual_scanner_value = value.decode('utf-8').strip()
                        except:
                            actual_scanner_value = str(value)
                    else:
                        actual_scanner_value = value

                if actual_scanner_value is not None:
                    callback_data_str = f"扫码数据: {actual_scanner_value}"
                    try:
                        triggering_port = port_name if port_name not in ['scanner_data', 'scanner'] else self.scanner_config.get('ser', 'N/A') if self.scanner_config else 'N/A'
                        if source_info.startswith("mock"):
                            triggering_port = f"mock_{port_name}"
                        
                        self.callbacks['scanner_data'](triggering_port, callback_data_str.encode('utf-8'))
                        logging.info(f"通知 'scanner_data' 回调. 值: {actual_scanner_value}, 源: {source_info}, 触发源端口: {triggering_port}")
                    except Exception as e:
                        logging.error(f"调用全局回调 'scanner_data' 失败: {e}", exc_info=True)
                else:
                    logging.warning(f"回调失败: scanner_data 中实际值为None. 初始 value: {value}")

        except Exception as e:
            logging.error(f"通知回调失败: {e}", exc_info=True) 

    def auto_open_configured_ports(self):
        """自动打开已配置的串口"""
        logging.info("尝试自动打开已配置的串口...")
        
        # 首先检查是否启用串口功能
        enable_serial_ports = self.config.get_value('app.features.enable_serial_ports', False)
        if not enable_serial_ports:
            logging.info("串口功能已在配置中禁用，跳过自动打开串口")
            return False
            
        success = True
        
        # 检查操作系统类型并提供合适的警告
        os_type = platform.system()
        if os_type == "Darwin" and (
            (self.mdz_config and 'ser' in self.mdz_config and self.mdz_config['ser'] and self.mdz_config['ser'].startswith('COM')) or
            (self.cz_config and 'ser' in self.cz_config and self.cz_config['ser'] and self.cz_config['ser'].startswith('COM')) or
            (self.xj_config and 'ser' in self.xj_config and self.xj_config['ser'] and self.xj_config['ser'].startswith('COM')) or
            (self.scanner_config and 'ser' in self.scanner_config and self.scanner_config['ser'] and self.scanner_config['ser'].startswith('COM'))
        ):
            logging.warning("检测到在macOS系统上配置了Windows格式的COM端口，这些端口将无法正常打开")
            logging.warning("macOS上的串口通常是/dev/tty.*或/dev/cu.*格式")
            # 继续尝试打开，但不影响程序流程
        
        # 尝试打开称重串口
        if self.cz_config and 'ser' in self.cz_config and self.cz_config['ser'] and self.cz_config['ser'].strip():
            port_name = self.cz_config['ser']
            baud_rate = self.cz_config.get('port', 9600)
            
            if not self.is_port_open(port_name):
                try:
                    if self.open_port(port_name, 'cz', baud_rate):
                        logging.info(f"自动打开称重串口 {port_name} 成功")
                    else:
                        logging.error(f"自动打开称重串口 {port_name} 失败")
                        success = False
                except Exception as e:
                    logging.error(f"自动打开称重串口 {port_name} 时发生异常: {e}")
                    success = False
            else:
                logging.info(f"称重串口 {port_name} 已经打开，无需重新打开")
        else:
            logging.warning("称重串口未配置或设置为不使用，跳过自动打开")
            
        # 尝试打开线径串口
        if self.xj_config and 'ser' in self.xj_config and self.xj_config['ser'] and self.xj_config['ser'].strip():
            port_name = self.xj_config['ser']
            baud_rate = self.xj_config.get('port', 19200)
            
            if not self.is_port_open(port_name):
                try:
                    if self.open_port(port_name, 'xj', baud_rate):
                        logging.info(f"自动打开线径串口 {port_name} 成功")
                    else:
                        logging.error(f"自动打开线径串口 {port_name} 失败")
                        success = False
                except Exception as e:
                    logging.error(f"自动打开线径串口 {port_name} 时发生异常: {e}")
                    success = False
            else:
                logging.info(f"线径串口 {port_name} 已经打开，无需重新打开")
        else:
            logging.warning("线径串口未配置或设置为不使用，跳过自动打开")
            
        # 尝试打开米电阻串口
        if self.mdz_config and 'ser' in self.mdz_config and self.mdz_config['ser'] and self.mdz_config['ser'].strip():
            port_name = self.mdz_config['ser']
            baud_rate = self.mdz_config.get('port', 9600)
            
            if not self.is_port_open(port_name):
                try:
                    if self.open_port(port_name, 'mdz', baud_rate):
                        logging.info(f"自动打开米电阻串口 {port_name} 成功")
                    else:
                        logging.error(f"自动打开米电阻串口 {port_name} 失败")
                        success = False
                except Exception as e:
                    logging.error(f"自动打开米电阻串口 {port_name} 时发生异常: {e}")
                    success = False
            else:
                logging.info(f"米电阻串口 {port_name} 已经打开，无需重新打开")
        else:
            logging.warning("米电阻串口未配置或设置为不使用，跳过自动打开")
            
        # 尝试打开扫码器串口
        if self.scanner_config and 'ser' in self.scanner_config and self.scanner_config['ser'] and self.scanner_config['ser'].strip():
            port_name = self.scanner_config['ser']
            baud_rate = self.scanner_config.get('port', 9600)
            
            if not self.is_port_open(port_name):
                try:
                    if self.open_port(port_name, 'scanner', baud_rate):
                        logging.info(f"自动打开扫码器串口 {port_name} 成功")
                    else:
                        logging.error(f"自动打开扫码器串口 {port_name} 失败")
                        success = False
                except Exception as e:
                    logging.error(f"自动打开扫码器串口 {port_name} 时发生异常: {e}")
                    success = False
            else:
                logging.info(f"扫码器串口 {port_name} 已经打开，无需重新打开")
        else:
            logging.warning("扫码器串口未配置或设置为不使用，跳过自动打开")
            
        # 注意：不在这里启动键盘监听器，而是在MainWindow的handle_start方法中显式调用start_keyboard_listener
        
        if not success:
            logging.warning("部分串口自动打开失败，请检查设备连接或在参数配置中手动打开")
            
        return True  # 总是返回True，防止应用程序因串口问题而终止

    def suspend_file_operations(self, suspend: bool):
        """暂停或恢复文件操作
        
        Args:
            suspend: True表示暂停，False表示恢复
        """
        with self._file_operations_lock:
            old_state = self._file_operations_suspended
            self._file_operations_suspended = suspend
            
        if old_state != suspend:
            if suspend:
                logging.info("已暂停SerialManager文件操作")
            else:
                logging.info("已恢复SerialManager文件操作") 

    def _read_diameter_thread(self, port_name: str):
        """
        线径串口读取线程
        
        Args:
            port_name: 串口名称
        """
        try:
            logging.info(f"[{port_name}] 线径线程启动")
            logging.info(f"线径自动查询已开启，将持续发送查询指令获取数据")
            
            while self.running_flags.get(port_name, False):
                if not self.is_port_open(port_name):
                    time.sleep(0.1)
                    continue
                
                try:
                    # 从配置获取查询命令，如果没有则使用默认命令
                    query_cmd = self.xj_config.get('query_cmd', '01 41 0d')
                    # 发送查询指令
                    byte_data = bytes.fromhex(query_cmd.replace(' ', ''))
                    self.serial_ports[port_name].write(byte_data)
                    
                    # 等待响应
                    time.sleep(0.5)
                    
                    if self.serial_ports[port_name].in_waiting > 0:
                        response = self.serial_ports[port_name].read(self.serial_ports[port_name].in_waiting)
                        self._process_diameter_response(port_name, response)
                
                except Exception as e:
                    logging.error(f"线径数据处理异常: {e}")
                
                # 查询间隔，从配置中获取或使用默认值
                query_interval = self.xj_config.get('query_interval', 5) if self.xj_config else 5
                wait_cycles = int(query_interval * 10)  # 转换为0.1秒的周期数
                
                # 每隔query_interval秒查询一次
                for i in range(wait_cycles):
                    if not self.running_flags.get(port_name, False):
                        break
                time.sleep(0.1)
                
        except Exception as e:
            logging.error(f"线径串口 {port_name} 读取线程异常: {e}")
            # 线程异常时，尝试重置状态
            self.running_flags[port_name] = False
            
    def _process_diameter_response(self, port_name, response_bytes: bytes):
        """处理线径响应数据"""
        try:
            if response_bytes:  # 确保有响应数据
                try:
                    # 转换为字符串用于日志记录
                    response_str = str(response_bytes)
                    logging.warning(f"[{port_name}] 线径数据: {response_str}")
                    
                    # 使用正则表达式直接提取数字
                    # 查找格式为20.15这样的浮点数
                    match = re.search(r'(\d+\.?\d*)', response_str)
                    if match:
                        number_str = match.group(1)
                        try:
                            # 转换为浮点数
                            xj_value = float(number_str)
                            logging.info(f"线径数据: {xj_value}")
                            
                            # 更新数据
                            self.data['xj'] = xj_value
                            self._write_data_to_file()
                            
                            # 构建MainWindow.on_diameter_data_received期望的格式
                            callback_data_str = f"线径数据: {xj_value}"
                            if 'xj_data' in self.callbacks:
                                try:
                                    # 与米电阻类似，传递实际的串口名称
                                    logging.info(f"线径回调开始调用，回调对象: {self.callbacks['xj_data'].__self__.__class__.__name__}, 数据: {xj_value}")
                                    self.callbacks['xj_data'](port_name, callback_data_str.encode('utf-8'))
                                    logging.info(f"通知 'xj_data' 回调成功. 值: {xj_value}, 串口: {port_name}")
                                except Exception as e:
                                    logging.error(f"调用 'xj_data' 回调失败: {e}")
                            else:
                                # 如果未注册回调，仍然使用通用方法通知
                                logging.warning(f"未找到xj_data回调，使用通用_notify_callbacks方法")
                            self._notify_callbacks('xj_data', {"type": "xj", "value": self.data['xj'], "source": f"serial ({port_name})"})
                            
                            return True
                        except ValueError:
                            logging.warning(f"线径数据字符串 '{number_str}' 无法转换为浮点数")
                    else:
                        logging.warning(f"线径数据中未找到有效的浮点数")
                except Exception as e:
                    logging.error(f"处理线径数据异常: {e}")
            else:
                logging.warning("线径响应数据为空")
            
            # 如果无法解析，则直接返回失败
            return False
        except Exception as e:
            logging.error(f"处理线径数据总体异常: {e}")
            return False

    def _read_scanner_thread(self, port_name: str):
        """
        扫码器串口读取线程
        
        Args:
            port_name: 串口名称
        """
        try:
            logging.info(f"[{port_name}] 扫码器线程启动")
            while self.running_flags.get(port_name, False):
                if not self.is_port_open(port_name):
                    time.sleep(0.1)
                    continue
                
                # 检查是否有数据可读
                if self.serial_ports[port_name].in_waiting > 0:
                    response = self.serial_ports[port_name].read(self.serial_ports[port_name].in_waiting)
                    self._process_scanner_response(port_name, response)
                
                time.sleep(0.1)
                
        except Exception as e:
            logging.error(f"扫码器串口 {port_name} 读取线程异常: {e}")
            # 线程异常时，尝试重置状态
            self.running_flags[port_name] = False
            
    def _process_scanner_response(self, port_name, response_bytes: bytes):
        """处理扫码器响应数据"""
        try:
            if response_bytes:  # 确保有响应数据
                try:
                    # 尝试解码为字符串
                    scanner_value = response_bytes.decode('utf-8').strip()
                    
                    # 记录日志
                    logging.info(f"[{port_name}] 扫码数据: {scanner_value}")
                    
                    # 更新数据
                    self.data['scanner'] = scanner_value
                    
                    # 写入文件并通知回调
                    self._write_data_to_file()
                    # 使用"扫码数据: xxx"格式通知回调
                    callback_data = f"扫码数据: {scanner_value}".encode('utf-8')
                    if 'scanner_data' in self.callbacks:
                        self.callbacks['scanner_data'](port_name, callback_data)
                    return True
                except Exception as e:
                    logging.error(f"处理扫码数据异常: {e}")
                    # 解码失败，尝试直接使用字节数据
                    # 记录日志（十六进制字符串）
                    hex_str = ' '.join(f'{b:02X}' for b in response_bytes)
                    logging.warning(f"[{port_name}] 扫码数据(十六进制): {hex_str}")
                    
                    # 更新数据（使用十六进制字符串）
                    self.data['scanner'] = hex_str
                    
                    # 写入文件并通知回调
                    self._write_data_to_file()
                    # 使用"扫码数据: xxx"格式通知回调
                    callback_data = f"扫码数据: {hex_str}".encode('utf-8')
                    if 'scanner_data' in self.callbacks:
                        self.callbacks['scanner_data'](port_name, callback_data)
                    return True
            else:
                logging.warning("扫码响应数据为空")
            
            # 如果无法解析，则直接返回失败
            return False
        except Exception as e:
            logging.error(f"处理扫码数据总体异常: {e}")
            return False 

    def _start_thread_monitor(self):
        """启动线程监控"""
        threading.Thread(target=self._monitor_threads, daemon=True).start()

    def _monitor_threads(self):
        """监控线程状态"""
        try:
            logging.info("线程监控已启动")
            while True:
                try:
                    # 创建当前线程的副本，避免在迭代过程中修改字典
                    thread_items = list(self.read_threads.items())
                    for port_name, thread in thread_items:
                        # 检查线程是否存活
                        if not thread.is_alive():
                            # 检查串口是否仍然打开
                            if port_name in self.serial_ports and self.is_port_open(port_name):
                                port_type = self.port_types.get(port_name)
                                callback = self.callbacks.get(port_name)
                                logging.warning(f"线程 {thread.name} 已终止但串口仍然打开，尝试重新启动线程")
                                
                                # 重置线程状态
                                self.running_flags[port_name] = False
                                if port_name in self.read_threads:
                                    self.read_threads.pop(port_name, None)
                                
                                # 如果有端口类型记录，尝试重新启动线程
                                if port_type:
                                    # 短暂等待，确保资源释放
                                    time.sleep(0.5)
                                    try:
                                        # 重新打开串口
                                        self.open_port(port_name, port_type, callback=callback)
                                        logging.info(f"已重新启动线程: {port_name} ({port_type})")
                                    except Exception as restart_error:
                                        logging.error(f"重新启动线程失败: {port_name}, 错误: {restart_error}")
                                else:
                                    logging.warning(f"无法重启线程: {port_name}, 未找到端口类型记录")
                            else:
                                # 串口已关闭，清理线程记录
                                if port_name in self.read_threads:
                                    self.read_threads.pop(port_name, None)
                                logging.info(f"线程 {thread.name} 已终止，串口已关闭，清理线程记录")
                    
                    # 每隔5秒检查一次
                    time.sleep(5)
                except Exception as loop_error:
                    logging.error(f"线程监控循环异常: {loop_error}")
                    time.sleep(5)  # 出错后等待一段时间再继续
        except Exception as e:
            logging.error(f"线程监控主循环异常: {e}")
            # 尝试重新启动监控
            time.sleep(10)
            self._start_thread_monitor()