In process of real-time 3D terrain-data acquisition based on PDA, the communication program was programmed with windows CE API function, serial interface operation combined event-driven with asynchronous-driven was adopted in communication port.

• 基于PDA的三维地形数据实时获取采用Windows CE API通信函数编写通信程序,通信接口采用事件驱动与异步结合的串口操作。