基于LM3S9B96的IEEE1588时钟同步系统

随着分布式系统在工业制造与实时控制、医疗、电力等方面的广泛应用,应用系统对时钟同步精度要求越来越高.传统的同步模式如GPS、NTP等,由于在成本或同步精度方面的原因,难以满足工业应用需求.采用硬件辅助实现IEEE1588的时钟同步技术可以极大的减少同步误差,是现在实现高精度同步的有效方法,并且实现综合成本较低.分析了IEEE1588基本同步原理和LM3S9B96物理层芯片的功能结构,实现了基于LM3S9B96的IEEE1588时钟同步模块,在局域网中测试、验证了其同步精度可达到纳秒量级.

Study and Implementation of IEEE1588 Clock Synchronization System Based on LM3S9B96

With distributed systems widely used in manufacturing and real-time control of industrial, medical, power, etc. The demand for clock synchronization system becomes urgent. Traditional synchronous mode, such as GPS, NTP, etc., due to the reasons of cost or synchronization accuracy is difficult to meet the demand for industrial applications. Hardware-assisted IEEE1588 clock synchronization technology can greatly reduce the synchronization error. It is the effective way to achieve high-precision synchronization, and lower overall costs. The functional structure of physical layer chip LM3S9B96 and the basic synchronous principle for IEEE1588 protocol are analyzed in this paper. Realized the IEEE1588 clock synchronization module based on LM3S9B96. Testing and validation in LAN, its synchronization accuracy can be achieved nanoseconds.