中圖分類號： TN927
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.201167
中文引用格式： 宋艷，應斌杰，楊成鋼，等. 基于ZYNQ的PTP授時精度測量方法與實現[J].電子技術應用，2021，47(6)：115-118，130.
英文引用格式： Song Yan，Ying Binjie，Yang Chenggang，et al. A method and implementation of PTP timing accuracy measurement based on ZYNQ[J]. Application of Electronic Technique，2021，47(6)：115-118，130.

A method and implementation of PTP timing accuracy measurement based on ZYNQ

Abstract： Aiming at the difficulties of PTP timing accuracy measurement, this paper puts forward using μCOS operating system and LWIP protocol stack on ZYNQ SOC to realize PTP timing accuracy measurement. Accurate system time and clock source difference are obtained by receiving GNSS signals, and the system time is synchronized to the nanosecond counter of ZYNQ by hardware. The ZYNQ EMAC interface is used to acquire the observation time of PTP frames, and the source difference is used to compensate the measurement time. Finally, an accurate time stamps are obtained, which can be used to measure the timing accuracy of the PTP master clock. The test results show that using this method to measure PTP clock, the measurement accuracy is better than 10 ns.

Key words : PTP；timing；GNSS；time stamp