The Development Of IEEE1588IP Core Based On FPGA

With the development of smart grid, an increasing number of intelligent electronic devices put into use in the measurement, protection and control system. Especially the development and application of electronic transformers and intelligent switches make traditional substation toward digital substation rapidly. More and more intelligent pre-cision equipment promote higher requirement within the system time synchronization. IEEE1588defines a Precise Time Protocol (PTP), which is of potentially wide appli-cation in control and measurement networks.This thesis analyses the content of IEEE1588standard in detail, and researches on the scope of application, type of messages, type of clocks and principle of the syn-chronization. Stamping PTP messages accurately in physical layer taking advantage of hardware circuits to achieve the object of high precision is focused. What’s more, the protocol compares the time synchronization technologies of GPS, IRIG-B code and network method, which are widely used in substation nowadays. It also analyses the possible existence of errors.On the basis of the research of IEEE1588, a solution of time synchronization based on IEEE1588is designed, and hardware platform based the structure of "ARM+FPGA+MAC+PHY" is involved. The chip selection and design of circuit of CPU, network module and FPGA has been done, and "DM9000+LXT971A" has also been designed for Ethernet communication. Meanwhile this solution also designed an IP core of hardware timestamp unit, while finished the function of stamping the time of PTP messages’ arrival and departure, high-precision clock based the algorithm for compensation of crystal frequency, and the communication with CPU. This work has been simulated in ModelSim.This thesis has customized the circuit board for debugging, and it works well. The IP core with the protocol engine was tested, the precision of this system could achieve microseconds. This job laid a good foundation for the deep research, and provide a reference solution for the time synchronization of IEEE1588.