Fiber-optic gyroscope dynamic frequency-dividing method

The invention discloses a fiber-optic gyroscope dynamic frequency-dividing method. The method comprises (1) a dynamic frequency-dividing parameter is acquired in real time; (2) in the fiber-optic gyroscope debugging process, the dynamic frequency-dividing parameter is inputted to a MCU single-chip microcomputer; (3) after fiber-optic gyroscope is electrified, the MCU single-chip microcomputer sends the dynamic frequency-dividing parameter to Spartan6FPGA chip via an SPI interface circuit; (4) the Spartan6FPGA chip sends the dynamic frequency-dividing parameter to a DCM_CLKGEN assembly of an SPI subordinate controller through communication, realized via internal logic, of an SPI main controller and an DCM_CLKGEN clock frequency-dividing assembly; and (5) after receiving the dynamic frequency-dividing parameter and a starting command sent by the SPT main controller in above FPGA, the Spartan6 DCM_CLKGEN clock frequency-dividing assembly performs multiplication-division frequency dividing and outputs a working frequency demanded by a gyro. In the method, only one download logic file needs generating aiming at one model of gyro products, and the logic generation workload is substantially reduced.