Switching system, method and apparatus of clock circuit, and non-transitory readable storage medium

A switching method of a clock circuit, comprising:

• receiving a first clock signal transmitted by a clock switching component;
• determining, based on the first clock signal and a second clock signal generated by a reference clock, a frequency offset between a clock generating component and the reference clock;
• and
• sending, in response to that the first clock signal and the frequency offset both satisfy set anomaly conditions, a switching signal to the clock switching component, to enable the clock switching component to control the clock generating component to switch a current clock to a standby clock based on the switching signal;
• wherein the standby clock is any one of all other clocks of the clock generating component except the current clock;
• wherein determining, based on the first clock signal and a second clock signal generated by a reference clock, a frequency offset between a clock generating component and the reference clock comprises:
• sampling the first clock signal and the second clock signal to obtain a first digital signal and a second digital signal, and multiplying the first digital signal and the second digital signal to obtain a mixed signal, extracting a frequency deviation signal from the mixed signal, carrying out fast Fourier transform on the frequency deviation signal to determine a frequency deviation point, and determining, based on the frequency deviation point and a number of sampling points, the frequency offset.

A non-transitory computer-readable storage medium, storing a computer program, wherein the computer program executed by a processor, the computer program following actions:

• receive a first clock signal transmitted by a clock switching component;
• determine, based on the first clock signal and a second clock signal generated by a reference clock, a frequency offset between a clock generating component and the reference clock;
• and
• send, in response to that the first clock signal and the frequency offset both satisfy set anomaly conditions, a switching signal to the clock switching component, to enable the clock switching component to control the clock generating component to switch a current clock to a standby clock based on the switching signal;
• wherein the standby clock is any one of all other clocks of the clock generating component except the current clock;
• sample the first clock signal and the second clock signal to obtain a first digital signal and a second digital signal, and multiply the first digital signal and the second digital signal to obtain a mixed signal, extract a frequency deviation signal from the mixed signal, carry out fast Fourier transform on the frequency deviation signal to determine a frequency deviation point, and determine, based on the frequency deviation point and a number of sampling points, the frequency offset.