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ck/device_b.py

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+"""
+设备B示例 - 接收端
+模拟第二台设备，接收站点数据（用户名、线路名称、站点编号）并应答
+"""
+
+from serial_protocol import SerialProtocol, Command
+from data_models import StationData, ResponseData
+import time
+import subprocess
+
+
+def on_receive(cmd: int, data: bytes):
+    """接收数据回调函数"""
+    print("\n" + "="*60)
+    print("[设备B] 收到数据")
+    print("="*60)
+    cmd_name = (Command(cmd).name if cmd in Command._value2member_map_
+                else 'UNKNOWN')
+    print(f"命令类型: 0x{cmd:02X} ({cmd_name})")
+
+    # 根据不同命令进行处理
+    if cmd == Command.HEARTBEAT:
+        print(">>> 收到心跳包")
+        # 可以回复ACK
+        device.send_ack()
+        print("<<< 已发送ACK应答\n")
+
+    elif cmd == Command.DATA_RESPONSE:
+        # 尝试解析站点数据
+        station_data = StationData.from_bytes(data)
+        if station_data:
+            print("\n📍 站点数据详情:")
+            print(f"   用户名称: {station_data.username}")
+            print(f"   线路名称: {station_data.line_name}")
+            print(f"   站点编号: 第{station_data.station_no}站")
+
+            # 根据站点编号执行不同逻辑
+            if station_data.station_no == 0:
+                print("\n🚀 站点编号为0，启动 actions.py")
+                # 启动 actions.py
+                
+                subprocess.Popen(["python", "actions.py"], cwd="d:\\Projects\\cjgc_data")
+
+            if station_data.station_no > 0:
+                print(f"\n🚀 站点编号为{station_data.station_no}，启动 check_station.py")
+                # 启动 check_station.py
+                
+                subprocess.Popen(["python", "check_station.py"], cwd="d:\\Projects\\cjgc_data")
+
+            # 创建统一格式的响应字典 {1:"xxx", 2:"xxx", 3:"xxx", ...}
+            response_dict = ResponseData.create_response(station_data)
+            print("\n📤 设备B统一响应格式:")
+            for key, value in response_dict.items():
+                print(f"   {key}: \"{value}\"")
+
+            # 发送响应
+            device.send_data(ResponseData.to_bytes(response_dict))
+            print("\n<<< 已发送响应字典\n")
+        else:
+            # 如果不是站点数据，按普通消息处理
+            message = data.decode('utf-8', errors='ignore')
+            print(f">>> 收到普通消息: {message}")
+            device.send_ack()
+            print("<<< 已发送ACK\n")
+
+    elif cmd == Command.CONTROL:
+        if len(data) >= 1:
+            control_code = data[0]
+            params = data[1:]
+            print(f">>> 收到控制命令: 0x{control_code:02X}, "
+                  f"参数: {params.hex()}")
+            # 执行控制逻辑...
+            device.send_ack()
+            print("<<< 已发送ACK\n")
+
+
+# 全局变量，用于在回调中访问
+device = None
+
+
+def main():
+    global device
+
+    # 创建串口协议实例
+    # 注意: 设备B应该使用另一个串口，或者通过虚拟串口对连接
+    # Windows: 'COM2', Linux: '/dev/ttyUSB1'
+    device = SerialProtocol(port='COM2', baudrate=115200)
+
+    print("=" * 60)
+    print("设备B - 接收端")
+    print("=" * 60)
+
+    # 打开串口
+    if not device.open():
+        print("❌ 无法打开串口")
+        return
+
+    print(f"✓ 串口已打开: {device.port} @ {device.baudrate}")
+
+    # 启动接收线程
+    device.start_receive(on_receive)
+    print("✓ 接收线程已启动，等待接收数据...")
+
+    try:
+        # 保持运行
+        while True:
+            time.sleep(1)
+
+    except KeyboardInterrupt:
+        print("\n\n用户中断")
+    finally:
+        device.close()
+        print("串口已关闭")
+
+
+if __name__ == '__main__':
+    main()