详细论述了所开发的串行通信链路的开发过程及设计方案。从光通信链路入手，在研究了相关串行通信接口协议的基础上，通过相关的发射和接收接口电路设计,开发了相应的光电转换接口模块， 并对其进行了相关的基带传输性能测试和数据通信测试。测试结果表明，所开发的光通信设备可稳定工作在460.8 kb/s。该光电转换接口设备是为了配合用于小型无人直升机的光传数字舵机的验证而开发，它以光信号的形式传输飞控计算机至舵机的控制指令，并返回舵机位置传感器信号。飞控计算机端电气接口采用RS-232标准，舵机控制器端采用RS-485接口标准，通信波特率为9600 b/s。通过其在直升机贴地飞行光传操纵半物理仿真平台上的验证表明，所开发的光电接口设备兼容两种串行接口，能够满足验证工作的需要。

The development process and design scheme of serial communication link are discussed in this paper.Started from the optical communication link the transmitter and receiver interface circuits were designed and the corresponding photoelectric translating interface module was developed based on study of related serial communication interface protocol.The baseband transmission performance and data communication performance of it were tested.The result verified that it can operate steadily at the baud rate of 460.8 kb/s.This photoelectric translating interface module was developed for the digital servo of a small unmanned helicopter.It translated the flight control instruct to the servo in the form of light signal and returned servo position sensor signal.The flight control computer used RS-232 electrical interface standards and the servo controller used RS-485 electrical interface standards at the baud rate of 9600 b/s.Through the verification experiment on semi-physical simulation platform it is shown that the photoelectric interface module is compatible with the two serial communication standards and can meet the request of verified work.