Method for Hardware Clock Synchronization Based on FPGA
Guo Li-xia · Electrotechnics Electric · 2010
The distributed control system based on industrial Ethernet was presented to realize synchronous measurement and real-time control.The requirements for precise clock synchronization were proposed.Analysis was made on the reason of less precise synchronization in clock synchronization plan based on embedded software.A field-programmable gate array(FPGA),hardware-based strategy was proposed for implementing the clock synchronization protocol defined in IEEE1588.FPGA with hardware description language was adopted to design timestamp capture,oscillator frequency compensation and clock synchronization algorithm etc modules.Test of the distributed control system shows it reaches the sub-microsecond range.