Abstract:

An IEEE 1588 server, which is based on the foreground/background system with the priorities of interrupts, is designed and implemented to meet the high precision requirement of time synchronization in distributed power systems by using an ARM?Cortex?-M3 based microcontroller, which supports IEEE 1588 protocol. The burden of microcontroller is reduced and the real-time performance is further improved as a result of adopting the lightweight TCP/IP stack and simplifying the protocol’s complexity to program the bottom communication software. It is shown in test experiments that this server characterizes high clock-synchronization accuracy, excellent stability and low cost, and it has a bright prosperity to be applied into practice.

Key words: IEEE 1588 standard, clock-synchronization, network timing, LwIP protocol

摘要：

为满足电力等分布式测控系统对时钟同步的高精度要求，采用TI公司支持IEEE 1588协议的Cortex-M3核ARM芯片作为微处理器，设计并实现一种基于中断优先级的前/后台框架的精密时钟网络服务器。由于选用轻量级TCP/IP协议栈(LwIP)和简化同步协议设计底层通信软件，能减轻处理器负担，实时性能得到改善。测试实验结果表明，该设备同步精度高、稳定性好、成本低，具有较好的应用前景。

关键词: IEEE 1588标准, 时钟同步, 网络授时, LwIP协议

CLC Number: 

• TP393