CN112732067A - Crystal oscillator switching method and device, terminal and storage medium - Google Patents
Crystal oscillator switching method and device, terminal and storage medium Download PDFInfo
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- CN112732067A CN112732067A CN202011621757.4A CN202011621757A CN112732067A CN 112732067 A CN112732067 A CN 112732067A CN 202011621757 A CN202011621757 A CN 202011621757A CN 112732067 A CN112732067 A CN 112732067A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/3237—Power saving characterised by the action undertaken by disabling clock generation or distribution
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the application provides a crystal oscillator switching method and device, a terminal and a storage medium, wherein the crystal oscillator switching method comprises the steps of obtaining the working amplitude of a high-frequency crystal oscillator and taking the working amplitude as a judgment threshold; after the terminal exits from the sleep state, triggering a high-frequency crystal oscillator switching process, wherein the high-frequency crystal oscillator switching process comprises the following steps: after the high-frequency crystal oscillator is powered on, periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches a judgment threshold value, and if so, switching the clock source to the high-frequency crystal oscillator. After the high-frequency crystal oscillator is powered on, the amplitude of the high-frequency crystal oscillator can be considered to be stable after reaching the judgment threshold, and then a clock source can be switched to the high-frequency crystal oscillator, so that the problem that the oscillation starting time is not enough or too long due to the reservation of the set oscillation starting time in the prior art is solved, and the synchronization performance of a terminal system is further ensured.
Description
Technical Field
The present invention relates to the field of time synchronization, and in particular, to a method and an apparatus for switching a crystal oscillator, a terminal, and a storage medium.
Background
In the design of embedded low-power consumption products (such as smart watches, bluetooth headsets, etc.), there are usually at least two types of crystal oscillator sources providing clock functions, one type is a high-frequency crystal oscillator, and such a type of clock provides a synchronization function in a system working state and provides a higher frequency required by the system as a fundamental frequency through frequency doubling. The other type is a low-frequency crystal oscillator, and the clock provides a synchronous function in a system sleep state.
In the design of an embedded low-power-consumption product, a high-precision crystal oscillator is used as a system working clock and a calibration clock of a low-precision crystal oscillator. In the prior art, the system can reserve the set oscillation starting time for the crystal oscillator to start oscillation, if the oscillation starting time reserved by the system is not enough, the state of the crystal oscillator is unstable, the synchronization function of the system can be influenced, and if the oscillation starting time reserved by the system is too long, the duty ratio of the working time of the system relative to the sleep time can be prolonged, and the power consumption of the system is increased.
Disclosure of Invention
The embodiment of the application provides a crystal oscillator switching method and device, a terminal and a storage medium, wherein the crystal oscillator switching method can periodically detect whether the current amplitude of a high-frequency crystal oscillator reaches a judgment threshold value or not by acquiring the working amplitude of the high-frequency crystal oscillator and taking the working amplitude as the judgment threshold value after the terminal exits from a sleep state and the high-frequency crystal oscillator is powered on, if so, the crystal oscillator can be determined to start oscillation stably, and a clock source is switched to the high-frequency crystal oscillator. By the scheme, whether the amplitude of the high-frequency crystal oscillator reaches the judgment threshold value can be periodically detected only after the high-frequency crystal oscillator is electrified without considering external factors (such as environment, temperature and the like) of the crystal oscillator, and the judgment threshold value is the working amplitude of the crystal oscillator, so that the amplitude of the high-frequency crystal oscillator can be considered to be stable after the amplitude of the high-frequency crystal oscillator reaches the judgment threshold value after the high-frequency crystal oscillator is electrified, and a clock source can be switched to the high-frequency crystal oscillator, so that the problem that the oscillation starting time is not enough or the oscillation starting time is too long due to the reservation of the set oscillation starting time in the prior art is solved, and the synchronization performance of a terminal system.
In a first aspect, an embodiment of the present application provides a crystal oscillator switching method, including:
acquiring the working amplitude of the high-frequency crystal oscillator, and taking the working amplitude as a judgment threshold;
after the terminal exits from the sleep state, triggering a switching high-frequency crystal oscillator process, wherein the switching high-frequency crystal oscillator process comprises the following steps:
and after the high-frequency crystal oscillator is powered on, periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the judgment threshold value, and if so, switching a clock source to the high-frequency crystal oscillator.
Further, the obtaining the working amplitude of the high-frequency crystal oscillator comprises:
and acquiring the working amplitude of the high-frequency crystal oscillator before the terminal enters a sleep state by triggering each time.
Further, the periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the judgment threshold includes:
after exiting the sleep state, periodically collecting the current amplitude of the high-frequency crystal oscillator;
and comparing the current amplitude with the working amplitude before entering the sleep state to determine whether the current amplitude reaches the judgment threshold value.
In a second aspect, an embodiment of the present application provides a crystal oscillator switching apparatus, including:
the acquisition module is used for acquiring the working amplitude of the high-frequency crystal oscillator and taking the working amplitude as a judgment threshold;
the processing module triggers a process of switching the high-frequency crystal oscillator after the terminal exits from the sleep state, wherein the process of switching the high-frequency crystal oscillator comprises the following steps:
after the high-frequency crystal oscillator is powered on, controlling the acquisition module to periodically detect the current amplitude of the high-frequency crystal oscillator, and periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the judgment threshold value, if so, switching a clock source to the high-frequency crystal oscillator.
Further, the obtaining the working amplitude of the high-frequency crystal oscillator comprises:
and the acquisition module acquires the working amplitude of the high-frequency crystal oscillator before the terminal is triggered to enter a sleep state each time.
Further, the periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the judgment threshold includes:
after exiting the sleep state, the acquisition module periodically acquires the current amplitude of the high-frequency crystal oscillator;
and the processing module compares the current amplitude with the working amplitude before entering the sleep state to determine whether the current amplitude reaches the judgment threshold value.
In a third aspect, an embodiment of the present application further provides a terminal, where the terminal includes the crystal oscillator switching device provided in the second aspect.
Further, the terminal crystal oscillator switching device may be an integrated circuit built in the terminal.
In a fourth aspect, an embodiment of the present application further provides a computer storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the crystal oscillator switching method provided in the first aspect.
By the technical scheme, whether the amplitude of the high-frequency crystal oscillator reaches the judgment threshold value can be periodically detected only after the high-frequency crystal oscillator is powered on without considering external factors (such as environment, temperature and the like) of the crystal oscillator, and the judgment threshold value is the working amplitude of the crystal oscillator, so that the amplitude of the high-frequency crystal oscillator can be considered to be stable after the amplitude of the high-frequency crystal oscillator reaches the judgment threshold value after the high-frequency crystal oscillator is powered on, and a clock source can be switched to the high-frequency crystal oscillator, so that the problem that the oscillation starting time is not enough or the oscillation starting time is too long due to the reservation of the set oscillation starting time in the prior art is solved, and the synchronization performance of a.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a crystal oscillation starting process in the prior art;
fig. 2 is a schematic flowchart of a crystal oscillator switching method according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a crystal switching device according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the design of embedded low-power consumption products (such as intelligent watches, Bluetooth headsets and the like), a high-precision crystal oscillator is used as a clock source when a system works, and a low-precision crystal oscillator is used as a clock source when the system sleeps. The high-precision clock is usually used as a system base Frequency, or multiplied to a high Frequency, and is provided for high-Frequency-demand modules such as Radio Frequency (RF) modules. Meanwhile, in order to meet the synchronous requirement of system sleep, the high-precision crystal oscillator can be used as a calibration clock of the low-precision crystal oscillator. In the system sleep process, in order to save power consumption, the high-precision clock is usually powered off and stopped.
Fig. 1 is a schematic diagram of a crystal oscillator oscillation starting process in the prior art, and as shown in fig. 1, since the oscillation starting needs time after the crystal oscillator is powered on, if the crystal oscillator is used by a system before the crystal oscillator is stabilized, the system synchronization function is likely to be disordered, and the function is likely to be abnormal.
At present, most of schemes measure the typical oscillation starting time of the crystal oscillator under specific environment and temperature, and then add redundant time in system design to ensure the stable oscillation starting of the crystal oscillator. If the oscillation starting time reserved by the system is not enough, the state of the crystal oscillator is unstable, the synchronous function of the system can be influenced, and if the oscillation starting time reserved by the system is too long, the duty ratio of the working time of the system relative to the sleep time can be prolonged, and the power consumption of the system is increased.
To solve the above technical problem, an embodiment of the present application provides a crystal oscillator switching method, and fig. 2 is a schematic flow chart of the crystal oscillator switching method according to an embodiment of the present application, and as shown in fig. 2, the crystal oscillator switching method includes the following steps:
step 201: and before entering a sleep state, collecting the working amplitude of the high-frequency crystal oscillator.
Before the terminal system enters the sleep state, the high-frequency crystal oscillator is still in a stable working state, that is, the amplitude of the high-frequency crystal oscillator at the moment is stable, so that the stable working amplitude of the high-frequency crystal oscillator in the stable working state can be obtained, and the stable working amplitude is used as a judgment threshold value for judging whether the crystal oscillator oscillation starting reaches the stable amplitude in the later period.
It should be noted that, the interval of each sleep state of the crystal oscillator is small, and therefore, it can be considered that the terminal is in the same environment in the time period of the adjacent sleep state of the terminal system, that is, the external factors of the crystal oscillator in the time period of the adjacent sleep state are the same. Therefore, the external factors of the crystal oscillator can be not considered in the starting stage of the crystal oscillator.
Step 202: the terminal system enters a sleep state.
Step 203: the terminal system exits the sleep state.
Step 204: and starting oscillation after the high-frequency crystal oscillator is electrified.
Step 205: whether the current amplitude of the high-frequency crystal oscillator reaches a judgment threshold value or not.
After the high-frequency crystal oscillator is powered on and starts oscillation, periodically acquiring the current amplitude of the high-frequency crystal oscillator, and periodically detecting whether the current amplitude reaches a stable working amplitude when the high-frequency crystal oscillator is in a stable working state, if so, judging that the current amplitude of the high-frequency crystal oscillator is in the stable state, and entering a step 206, otherwise, continuing to periodically execute a step 205, namely periodically detecting whether the current amplitude reaches the stable working amplitude when the high-frequency crystal oscillator is in the stable working state.
Step 206: and switching the time source of the terminal to a high-frequency crystal oscillator.
Fig. 3 is a crystal oscillator switching apparatus according to another embodiment of the present application, and as shown in fig. 3, the apparatus may include an acquisition module 301 and a processing module 302, where the acquisition module 301 is configured to acquire a stable working amplitude of a high-frequency crystal oscillator before a terminal system enters a sleep state each time, and use the stable working amplitude as a threshold for determining whether the oscillation starting of the crystal oscillator reaches the stable amplitude in a later period. And the collecting module 301 executes the operation of collecting the above-mentioned judgment threshold before the terminal system enters the sleep state each time.
After the terminal system exits from the sleep state, the acquisition module 301 may periodically detect and acquire the current amplitude of the high-frequency crystal oscillator after the high-frequency crystal oscillator starts oscillation on power, and then the processing module 302 periodically detects whether the current amplitude reaches the stable working amplitude of the high-frequency crystal oscillator in the stable working state according to the current amplitude of the high-frequency crystal oscillator acquired by the acquisition module 301, if so, determines that the current amplitude of the high-frequency crystal oscillator is in the stable state, and switches the time source of the terminal to the high-frequency crystal oscillator. If the current amplitude of the high-frequency crystal oscillator does not reach the stable working amplitude of the high-frequency crystal oscillator in the stable working state, continuously and periodically detecting whether the current amplitude reaches the stable working amplitude of the high-frequency crystal oscillator in the stable working state or not, and switching the time source of the terminal to the high-frequency crystal oscillator until the current amplitude of the high-frequency crystal oscillator is in the stable state.
In this embodiment, the crystal oscillator switching device may be an integrated circuit built in the terminal, and in the embodiment of the present application, the acquisition operation of the current amplitude of the high-frequency crystal oscillator is executed by the integrated circuit built in the terminal, so that the acquisition operation can be completed in a short time, the system has the shortest starting-oscillation stabilization time for waiting for the crystal oscillator, and the efficiency of the crystal oscillator switching process is improved.
The embodiment of the present application further provides a terminal, where the terminal may include the crystal oscillator switching device provided in the embodiment shown in fig. 3, and the crystal oscillator switching device may be an integrated circuit built in the terminal.
It should be noted that the terminal according to the embodiment of the present invention may include, but is not limited to, a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld hardware, a Tablet Computer (Tablet Computer), a mobile phone, an MP3 player, an MP4 player, an intelligent wearable device, and the like.
The embodiment of the present application further provides a computer storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the crystal oscillator switching method provided in the embodiment shown in fig. 2 can be implemented.
It should be understood that the application may be an application program (native app) installed on the terminal, or may also be a web page program (webApp) of a browser on the terminal, which is not limited in this embodiment of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A crystal switching method, the method comprising:
acquiring the working amplitude of the high-frequency crystal oscillator, and taking the working amplitude as a judgment threshold;
after the terminal exits from the sleep state, triggering a switching high-frequency crystal oscillator process, wherein the switching high-frequency crystal oscillator process comprises the following steps:
and after the high-frequency crystal oscillator is powered on, periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the judgment threshold value, and if so, switching a clock source to the high-frequency crystal oscillator.
2. The method of claim 1, wherein obtaining the operating amplitude of the high frequency crystal oscillator comprises:
and acquiring the working amplitude of the high-frequency crystal oscillator before the terminal enters a sleep state by triggering each time.
3. The method of claim 2, wherein the periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the decision threshold comprises:
after exiting the sleep state, periodically collecting the current amplitude of the high-frequency crystal oscillator;
and comparing the current amplitude with the working amplitude before entering the sleep state to determine whether the current amplitude reaches the judgment threshold value.
4. A crystal oscillator switching apparatus, comprising:
the acquisition module is used for acquiring the working amplitude of the high-frequency crystal oscillator and taking the working amplitude as a judgment threshold;
the processing module triggers a high-frequency crystal oscillator switching process after the terminal exits from the sleep state, wherein the high-frequency crystal oscillator switching process comprises the following steps:
after the high-frequency crystal oscillator is powered on, controlling the acquisition module to periodically detect the current amplitude of the high-frequency crystal oscillator, and periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the judgment threshold value, if so, switching a clock source to the high-frequency crystal oscillator.
5. The apparatus of claim 4, wherein the obtaining the operating amplitude of the high frequency crystal oscillator comprises:
and the acquisition module acquires the working amplitude of the high-frequency crystal oscillator before the terminal is triggered to enter a sleep state each time.
6. The apparatus according to claim 4 or 5, wherein the periodically detecting whether the current amplitude of the high-frequency crystal oscillator reaches the judgment threshold comprises:
after exiting the sleep state, the acquisition module periodically acquires the current amplitude of the high-frequency crystal oscillator;
and the processing module compares the current amplitude with the working amplitude before entering the sleep state to determine whether the current amplitude reaches the judgment threshold value.
7. A terminal, characterized in that the terminal comprises: the crystal switching device according to claim 9.
8. The terminal of claim 7, wherein the crystal switching device is an integrated circuit built in the terminal.
9. A computer storage medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the method according to any one of claims 1-3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011621757.4A CN112732067B (en) | 2020-12-31 | 2020-12-31 | Crystal oscillator switching method and device, terminal and storage medium |
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| CN202011621757.4A CN112732067B (en) | 2020-12-31 | 2020-12-31 | Crystal oscillator switching method and device, terminal and storage medium |
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| CN112732067B CN112732067B (en) | 2022-11-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114578153A (en) * | 2022-01-26 | 2022-06-03 | 奉加微电子（上海）有限公司 | Crystal oscillation detection circuit |
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