基于lm3s9b96的ieee1588时钟同步系统-计算机系统应用.pdfVIP

计 算 机 系 统 应 用 2013 年 第 22 卷 第 4 期 ① 基于 LM3S9B96 的IEEE1588 时钟同步系统 郭鹏飞, 任小玲, 黄国兵 (西安工程大学 计算机科学学院, 西安 710048) 摘 要: 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. 关键词: IEEE1588; LM3S9B96; 时钟同步; 硬件时间戳 Study and Implementation of IEEE1588 Clock Synchronization System Based on LM3S9B96 GUO Peng-Fei, REN Xiao-Ling, HUANG Guo-Bing (College of Computer Science, Xi’an Polytechnic University, Xi’an 710048, China) Abstract: 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. Key words: IEEE1588; LM3S9B96; clock synchronization; hardware timestamp 随着网络技术的不断发展, 分布式系统现在在测 较低, 故其在工业应用领域有其独特的优势, 应用前 量仪器和工业控制、医疗、通信、电力等各个领域的