CN114710257A - Frequency adjusting method and device and slave - Google Patents

Abstract

The present disclosure provides a frequency adjustment method, device and slave. The method includes: determining a sending interval of detection packets sent by a host; determining a first working frequency of the host according to the sending interval; When the frequency matching conditions are not met between the second operating frequencies, a frequency control signal is generated; the frequency control signal is sent to the oscillating device, so that the oscillating device can adjust the operating parameters according to the frequency control signal, so that the slave is adjusted by the second operating frequency to the third operating frequency. According to the embodiments of the present disclosure, the cost of the slave machine can be reduced, and at the same time, the working frequency of the slave machine can be guaranteed to match the working frequency of the master machine.

Description

Frequency adjustment method, device and slave

technical field

The present disclosure relates to the field of communication technologies, and in particular, to a frequency adjustment method, device and slave.

Background technique

The master and slave devices based on Universal Serial Bus (Universal Serial Bus, USB) transmit data in an asynchronous manner, which has higher requirements on the precision of frequency or clock. In a slave device, in order to generate a high-precision frequency that matches the master, an external crystal oscillator is usually used as the frequency input source, and the final frequency is obtained through a phase-locked loop (PLL) frequency multiplication and other methods. Since a high-cost crystal oscillator is used as the frequency input source, the cost of the USB slave device is high.

SUMMARY OF THE INVENTION

The present disclosure provides a frequency adjustment method, device and slave.

In a first aspect, the present disclosure provides a frequency adjustment method, which is applied to an oscillation control device of a slave machine, the slave machine includes an oscillation device connected to the oscillation control device, and the frequency adjustment method includes: determining the detection sent by the master machine. packet sending interval; according to the sending interval, determine the first working frequency of the master; when the frequency matching condition is not satisfied between the first working frequency and the second working frequency of the slave, generate frequency control signal; send the frequency control signal to the oscillating device, so that the oscillating device can adjust the working parameters according to the frequency control signal, so that the slave machine can be adjusted from the second working frequency to the third working frequency frequency, the frequency matching condition is satisfied between the third operating frequency and the first operating frequency.

In a second aspect, the present disclosure provides a frequency adjustment method, which is applied to an oscillation device of a slave machine, the slave machine includes an oscillation control device connected to the oscillation device, and the frequency adjustment method includes: receiving the oscillation control device The frequency control signal sent; wherein, the frequency control signal is a signal sent by the oscillation control device when the frequency matching condition is not satisfied between the first operating frequency of the master and the second operating frequency of the slave, The first working frequency is the frequency determined by the oscillation control device according to the sending interval of the detection packets sent by the host; the working parameters are adjusted according to the frequency control signal, so that the slave is adjusted by the second working frequency to a third operating frequency, where the third operating frequency and the first operating frequency satisfy the frequency matching condition.

In a third aspect, the present disclosure provides an oscillation control device, the oscillation control device is provided in a slave machine, the slave machine further includes an oscillation device connected to the oscillation control device, and the oscillation control device includes: an interval determination a unit for determining the sending interval of the detection packets sent by the host; a frequency determining unit for determining the first working frequency of the host according to the sending interval; a generating unit for determining the first working frequency between the first working frequency and the In the case where the frequency matching condition is not satisfied between the second operating frequencies of the slaves, a frequency control signal is generated; the sending unit is configured to send the frequency control signal to the oscillating device, so that the oscillating device can send the frequency control signal to the oscillating device according to the selected frequency The frequency control signal adjusts working parameters, so that the slave is adjusted from the second working frequency to a third working frequency, and the frequency matching condition is satisfied between the third working frequency and the first working frequency.

In a fourth aspect, the present disclosure provides an oscillating device, the oscillating device is provided in a slave machine, the slave machine further includes an oscillating control device connected to the oscillating device, the oscillating device includes: a receiving unit for Receive the frequency control signal sent by the oscillation control device; wherein, the frequency control signal is the frequency control signal that the oscillation control device does not satisfy the frequency matching condition between the first working frequency of the master and the second working frequency of the slave The first working frequency is the frequency determined by the oscillation control device according to the sending interval of the detection packets sent by the host; the adjustment unit is used to adjust the working parameters according to the frequency control signal, so that the The slave is adjusted from the second working frequency to a third working frequency, and the frequency matching condition is satisfied between the third working frequency and the first working frequency.

In a fifth aspect, the present disclosure provides a slave machine, the slave machine comprising: at least one oscillation device; and an oscillation control device connected to the at least one oscillation device; wherein, the oscillation control device is used to implement the present disclosure The frequency adjustment method described in any one of the embodiments; the oscillation device is used to implement the frequency adjustment method described in any one of the embodiments of the present disclosure.

In a sixth aspect, the present disclosure provides an electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores data that can be processed by the at least one processor One or more computer programs executed by a processor, one or more of the computer programs being executed by the at least one processor, to enable the at least one processor to perform the above-described frequency adjustment method.

In a seventh aspect, the present disclosure provides a computer-readable storage medium on which a computer program is stored, wherein the computer program implements the above-mentioned frequency adjustment method when executed by a processor/processing core.

In the embodiment provided by the present disclosure, a low-cost oscillation device and an oscillation control device are set inside the slave to replace the external crystal oscillator, which can effectively reduce the cost of the slave. Moreover, the oscillation control device is responsible for detecting the working frequency of the slave and the host's operating frequency. Whether the frequency matching conditions are met between the working frequencies, and if the frequency matching conditions are not met, the frequency control signal is sent to the oscillating device. The frequency meets the frequency matching conditions, so that the working frequency of the slave can be adjusted in time and accurately, and the normal communication between the master and the slave can be guaranteed.

It should be understood that what is described in this section is not intended to identify key or critical features of embodiments of the disclosure, nor is it intended to limit the scope of the disclosure. Other features of the present disclosure will become readily understood from the following description.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification, and together with the embodiments of the present disclosure, they are used to explain the present disclosure, and are not intended to limit the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art from the description of detailed example embodiments with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a slave according to an embodiment of the present disclosure.

FIG. 2 is a flowchart of a frequency adjustment method provided by an embodiment of the present disclosure.

FIG. 3 is a flowchart of a frequency adjustment method provided by an embodiment of the present disclosure.

FIG. 4 is a flowchart of a frequency adjustment method provided by an embodiment of the present disclosure.

FIG. 5 is a flowchart of a frequency adjustment method provided by an embodiment of the present disclosure.

FIG. 6 is a schematic diagram of a slave according to an embodiment of the present disclosure.

FIG. 7 is a schematic diagram of a working process of a frequency adjustment method provided by an embodiment of the present disclosure.

FIG. 8 is a block diagram of an oscillation control apparatus according to an embodiment of the present disclosure.

FIG. 9 is a block diagram of an oscillating device according to an embodiment of the present disclosure.

FIG. 10 is a block diagram of a slave provided by an embodiment of the present disclosure.

FIG. 11 is a block diagram of an electronic device according to an embodiment of the present disclosure.

Detailed ways

In order for those skilled in the art to better understand the technical solutions of the present disclosure, the exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, and they should be considered to be exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted from the following description for clarity and conciseness.

Various embodiments of the present disclosure and various features of the embodiments may be combined with each other without conflict.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used herein is used to describe particular embodiments only and is not intended to limit the present disclosure. As used herein, the singular forms "a" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that when the terms "comprising" and/or "made of" are used in this specification, the stated features, integers, steps, operations, elements and/or components are specified to be present, but not precluded or Add one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in common dictionaries should be construed as having meanings consistent with their meanings in the context of the related art and the present disclosure, and will not be construed as having idealized or over-formal meanings, unless expressly so limited herein.

The slave is a device relative to the host. Usually, data transmission can be performed between the slave and the host according to the agreed communication protocol. For example, data is transmitted between two devices based on the USB connection method through the USB communication protocol. According to the primary and secondary relationship of the two devices, the two devices can be divided into a USB host and a USB slave.

USB communication belongs to asynchronous serial communication, which adopts non-return-to-zero code for transmission, and the communication clock is generated by the master and the slave respectively. The sending and receiving parties can negotiate the USB version during handshake to determine the communication speed. However, the master and the slave do not have the same source clock. Under the accumulation of errors, the problem of communication loss will inevitably occur. In order to solve this problem, in the related art, a crystal oscillator is usually set outside the slave machine, and the slave machine completes information transmission with the host according to the frequency of the crystal oscillator.

FIG. 1 is a schematic diagram of a slave according to an embodiment of the present disclosure. 1, a crystal oscillator 101 is provided outside the slave, and a USB interface 102 connected to the host, a phase-locked loop module 103, a clock phase adjustment module 104, a data transceiver module 105, and a data processing and protocol analysis module 106 are provided in the slave. The external crystal oscillator 101 generates a high-precision initial clock signal and inputs it to the phase-locked loop module 103 of the slave. The phase-locked loop module 103 obtains a multiplied clock by multiplying the initial clock signal, and inputs the multiplied clock to the clock phase adjustment. module 104, thereby obtaining a high-precision clock. The clock phase adjustment module 104 inputs the clock to the data transceiver module 105 to control the information transmission between the slave and the host, and the data processing and protocol analysis module 106 can further process related data. In addition, the data transceiver module 105 and the slave interface 102 can obtain USB differential data through differential operation, and the USB differential data can reflect the phase deviation between the slave clock and the host clock. Based on this, the clock phase adjustment module 104 can be based on the USB differential data. The data adjusts the slave clock to ensure that the clock phases of the slave and the master are consistent.

In the slave shown in FIG. 1 , although a higher-precision clock can be obtained, the cost of the external crystal oscillator is relatively high, so the cost of the USB system is correspondingly high.

In view of this, in the embodiment of the present disclosure, an oscillation device and an oscillation control device are provided inside the slave to replace the external crystal oscillator, wherein the oscillation device can use a resistance-capacitor oscillation unit or an inductance oscillation unit, etc., thereby effectively reducing costs; The control device effectively controls the oscillating device to keep the working frequency of the slave and the master within the preset error range, and, when the working frequency of the master or slave changes, immediately The operating frequency of the slave machine is adjusted accordingly, so that the slave machine works at a high-precision frequency (clock), so as to ensure the normal communication between the slave machine and the master machine.

The frequency adjustment method according to the embodiment of the present disclosure may be performed by an oscillation control device or an oscillation device. The oscillation control device and the oscillation device are functional modules arranged in the slave machine, and the slave machine and the host machine are connected through a USB interface for data transmission. The host can be an electronic device such as a terminal device or a server, and the terminal device can be a vehicle-mounted device, a user equipment (User Equipment, UE), a mobile device, a user terminal, a terminal, a cellular phone, a cordless phone, a personal digital assistant (Personal Digital Assistant, PDA) ), handheld devices, computing devices, in-vehicle devices, wearable devices, etc.

FIG. 2 is a flowchart of a frequency adjustment method provided by an embodiment of the present disclosure, which is applied to an oscillation control device of a slave machine, and the slave machine further includes an oscillation device connected to the oscillation control device. 2, the method includes the following steps.

In step S21, the transmission interval of detection packets sent by the host is determined.

In step S22, the first operating frequency of the host is determined according to the sending interval.

In step S23, if the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency of the slave, a frequency control signal is generated.

In step S24, the frequency control signal is sent to the oscillating device, so that the oscillating device can adjust the working parameters according to the frequency control signal, so that the slave machine can be adjusted from the second working frequency to the third working frequency, and the third working frequency is the same as the first working frequency. meet the frequency matching conditions.

In some possible implementations, a connection is established between the slave and the host through a USB interface.

For example, if the personal computer and the mobile hard disk are connected by USB, the personal computer is the host computer and the mobile hard disk is the slave computer. For another example, if the intelligent vehicle controller is connected to the in-vehicle networking terminal through USB, the intelligent vehicle controller is a USB host, and the in-vehicle networking terminal is a USB slave.

In some possible implementations, the slave further includes a data transceiver module, which can be used to receive data transmitted by the host, or transmit data to the host. In step S21, the oscillation control device determines the sending interval of the detection packets according to the detection packets received by the data transceiver module and sent by the host.

In some possible implementation manners, determining the sending interval of the detection packet sent by the host includes: in the case of receiving the current detection packet, determining the interval between the sending time of the current detection packet and the previous detection packet, and obtaining the transmission interval . The current detection packet is the detection packet currently received by the slave, and the previous detection packet is the detection packet received at the previous moment adjacent to the current detection packet. In other words, every time the slave receives a detection packet, the oscillation control means determines the interval between the transmission times of the current detection packet and the previous detection packet, thereby obtaining the transmission interval.

In some possible implementations, the detection packet may be a Start of Frame (SOF) packet or a heartbeat packet.

In one example, the SOF packet includes information such as the PID field (used to characterize the type of the USB transmission packet), the frame number field, and the CRC5 field (Cyclic Redundancy Check 5, which represents a 5-bit cyclic redundancy check), and is sent by the USB host. The controller issues every 1.00ms±0.0005ms at the nominal rate of the full-speed bus (125μs±0.0625μs for the high-speed bus). After the slave detects the SOF packet, it knows that the host controller starts to start a frame (micro frame), so as to obtain the first operating frequency of the host according to the transmission interval between two adjacent SOF packets.

After obtaining the first operating frequency of the host, in step S23, when it is determined that the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency, a frequency control signal is generated. The second operating frequency is the current operating frequency of the slave, and the frequency matching condition is a condition used to determine whether the relationship between the first operating frequency and the second operating frequency can ensure normal communication between the master and the slave.

In some possible implementations, the frequency matching condition includes a frequency error threshold. The frequency error threshold may be an absolute error (for example, 0.0005ms) or a relative error (for example, the frequency error threshold is 150ppm, and ppm represents the deviation of the nominal frequency), which is not limited in this embodiment of the present disclosure.

In the case where the frequency matching condition includes a frequency error threshold, before step S23, the method further includes: the oscillation control device calculates the difference between the first operating frequency and the second operating frequency, and determines the first operating frequency according to the difference and the frequency error threshold Whether the frequency matching condition is satisfied with the second operating frequency.

Since the frequency error threshold can be an absolute threshold or a relative threshold, determining whether the frequency matching condition is satisfied between the first operating frequency and the second operating frequency according to the difference and the frequency error threshold includes: when the frequency error threshold is the absolute threshold In the case of , determine the difference between the first operating frequency and the second operating frequency, compare the absolute value of the difference with the frequency error threshold, when the absolute value of the difference is greater than or equal to the frequency error threshold, determine the first The frequency matching condition is not satisfied between the operating frequency and the second operating frequency, and when the absolute value of the difference is less than the frequency error threshold, it is determined that the frequency matching condition is satisfied between the first operating frequency and the second operating frequency.

When the frequency error threshold is a relative threshold, determine the difference between the first operating frequency and the second operating frequency, and calculate the percentage of the absolute value of the difference to the first operating frequency, when the percentage is greater than or equal to the frequency error threshold When , it is determined that the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency, and when the percentage is less than the frequency error threshold, it is determined that the frequency matching condition is satisfied between the first operating frequency and the second operating frequency.

In some possible implementations, the frequency control signal includes indication information for adjusting the operating parameters of the oscillating device.

In some possible implementations, in step S24, the oscillation control device sends frequency control information to the oscillation device, and the oscillation device adjusts its operating parameters according to the frequency control information, so that the slave machine is adjusted from the second operating frequency to the third operating frequency frequency, wherein the frequency matching condition is satisfied between the third operating frequency and the first operating frequency.

In one example, the oscillating device includes a Resistor-Capacitor (RC) oscillating unit and a phase-locked loop (PLL) unit, and the operating parameters of the oscillating device include an output frequency of the resistance-capacitor oscillating unit and frequency multiplication adjustment of the PLL unit parameter, the operating frequency of the slave is equal to the product of the output frequency and the frequency multiplier adjustment parameter. Based on this, the indication information in the frequency control signal may be information that instructs the resistance-capacitor oscillating unit to adjust the output frequency, and/or information that instructs the phase-locked loop unit to adjust the frequency multiplication adjustment parameter. In other words, by adjusting at least one of the output frequency and the frequency multiplier adjustment parameter, the third operating frequency that meets the requirements is obtained.

It should be noted that the frequency adjustment method provided by the embodiments of the present disclosure is applicable to both the frequency adjustment of the slave machine from the initial startup to the normal working stage, and the frequency adjustment of the slave machine during the normal working stage. In other words, the third operating frequency may not be the final operating frequency of the slave. After step S24, when the operating frequencies of the slave and/or the master do not meet the frequency matching condition due to external factors such as temperature and voltage, the slave The oscillation control device in the machine can detect it and adjust the working frequency of the slave machine in real time, so that the working frequency of the slave machine and the master machine meet the frequency matching conditions. It should be understood that no matter what stage it is in, the essence of the frequency adjustment method will not change, and the embodiment of the present disclosure does not limit the use stage of the frequency adjustment method.

3 is a flowchart of a frequency adjustment method provided in an embodiment of the present disclosure, which is applied to an oscillation control device of a slave machine, and the slave machine further includes an oscillation device connected to the oscillation control device. 3, the method includes the following steps.

In step S31, the transmission interval of the detection packets sent by the host is determined.

In step S32, the first operating frequency of the host is determined according to the sending interval.

The contents of steps S31 to S32 in the embodiment of the present disclosure are the same as the contents of steps S21 to S22 in the previous embodiment of the present disclosure, and are not repeated here.

In step S33, the second operating frequency of the slave is determined according to the output frequency and the frequency multiplication adjustment parameter.

In some possible implementations, the oscillating device includes an RC oscillating unit and a phase-locked loop unit, wherein the RC oscillating unit is used to provide an initial output frequency, and the phase-locked loop unit has a frequency multiplication function, which can be adjusted by frequency multiplication parameters. The output frequency of the RC oscillator unit is multiplied, so that the slave can obtain a suitable working frequency.

In some possible implementations, in step S33, the output frequency is multiplied by the frequency multiplication adjustment parameter, and the obtained product is the second operating frequency of the slave.

In step S34, the difference between the first operating frequency and the second operating frequency is determined.

In step S35, it is determined whether the frequency matching condition is satisfied between the first operating frequency and the second operating frequency according to the difference value and the frequency error threshold.

In step S36, if the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency of the slave, a frequency control signal is generated.

In step S37, the frequency control signal is sent to the oscillating device, so that the oscillating device can adjust the working parameters according to the frequency control signal, so that the slave device can be adjusted from the second working frequency to the third working frequency.

It should be noted that, after step S35, if it is determined that the frequency matching condition is satisfied between the first working frequency and the second working frequency, the oscillation control device starts a new round of detection according to the newly received detection packet, so as to ensure timely detection. It is detected that the working frequency of the slave machine and the working frequency of the host machine do not meet the frequency matching conditions, and the adjustment is made in time to ensure the normal communication between the slave machine and the host machine.

4 is a flowchart of a frequency adjustment method provided in an embodiment of the present disclosure, which is applied to an oscillation device of a slave machine, and the slave machine further includes an oscillation control device connected to the oscillation device. 4, the method includes the following steps.

In step S41, the frequency control signal sent by the oscillation control device is received.

The frequency control signal is a signal sent by the oscillation control device when the frequency matching condition is not satisfied between the first operating frequency of the master and the second operating frequency of the slave, and the first operating frequency is a signal sent by the oscillation control device according to the master. The frequency determined by the sending interval of the detection packet.

In step S42, the working parameters are adjusted according to the frequency control signal, so that the slave is adjusted from the second working frequency to the third working frequency, and the frequency matching condition is satisfied between the third working frequency and the first working frequency.

In some possible implementations, the frequency control signal includes indication information for adjusting the operating parameters of the oscillating device.

In one example, the oscillation device includes a resistance-capacitor (RC) oscillation unit and a phase-locked loop (PLL) unit, and the operating parameters of the oscillation device include an output frequency of the resistance-capacitor oscillation unit and a frequency multiplication adjustment parameter of the phase-locked loop unit, and the slave The operating frequency is equal to the product of the output frequency and the frequency multiplier adjustment parameter. Based on this, the indication information in the frequency control signal may be information that instructs the resistance-capacitor oscillating unit to adjust the output frequency, and/or information that instructs the phase-locked loop unit to adjust the frequency multiplication adjustment parameter. After receiving the frequency control signal, the oscillating device adjusts at least one of the output frequency and the frequency multiplication adjustment parameter, so that the slave obtains a third working frequency that meets the requirements.

5 is a flowchart of a frequency adjustment method provided by an embodiment of the present disclosure, which is applied to an oscillation device of a slave machine, and the slave machine further includes an oscillation control device connected to the oscillation device. 5, the method includes the following steps.

In step S51, in response to the start-up instruction, the working parameters are determined according to the initial configuration information.

In step S52, the second working frequency is determined according to the working parameters, so that the slave machine works based on the second working frequency.

It should be noted that, because the above-mentioned second operating frequency is obtained based on the operating parameters determined by the initial configuration information, and is not operated such as frequency calibration, the accuracy of the second operating frequency is usually low. In the subsequent operation, the oscillation device adjusts the second operating frequency according to the frequency control signal sent by the oscillation control device, so that a frequency with higher precision can be obtained, so that the slave machine works at the operating frequency matching the master machine, so as to ensure that the slave machine and the Normal communication between hosts.

In step S53, the frequency control signal sent by the oscillation control device is received.

In step S54, the operating parameters are adjusted according to the frequency control signal, so that the slave machine is adjusted from the second operating frequency to the third operating frequency.

Wherein, the frequency matching condition is satisfied between the third operating frequency and the first operating frequency.

Steps S53 to S54 in this embodiment of the present disclosure have the same contents as steps S41 to S42 in the previous embodiment of the present disclosure, and are not repeated here.

FIG. 6 is a schematic diagram of a slave according to an embodiment of the present disclosure. 6 , the slave includes: a USB interface 601 , an oscillation device 602 , an oscillation control device 603 , a clock phase adjustment module 604 , a data transceiver module 605 , and a data processing and protocol analysis module 606 . The biggest difference between it and the slave shown in FIG. 1 is that an oscillation device 602 and an oscillation control device 603 are added inside the slave to replace the external crystal oscillator.

In some possible implementations, the oscillation device 602 includes a capacitance-resistance oscillation unit 6021 and a phase-locked loop unit 6022 . In the start-up stage of the slave machine, the oscillation device 602 is initialized according to the working parameters determined by the initial configuration information to generate a frequency signal with lower precision. At this time, the slave machine works at the second working frequency. The data transceiver module 605 receives the SOF packet sent by the host, and the oscillation control device 603 determines the sending interval of the SOF packet, determines the first operating frequency of the host according to the sending interval, and compares the first operating frequency and the second operating frequency, and according to the comparison result and the frequency The error threshold determines whether the second operating frequency of the slave needs to be adjusted. When it is determined that adjustment is required, the oscillation control device 603 sends a frequency control signal to the oscillation device 602 . The oscillating device 602 adjusts the working parameters according to the frequency control signal, so that the slave machine is adjusted from the second working frequency to the third working frequency, wherein the third working frequency and the first working frequency satisfy the frequency matching condition.

During the normal operation of the slave based on the third operating frequency, the oscillation control device 603 will continuously detect whether the operating frequency of the slave and the operating frequency of the master satisfy the frequency matching condition based on the SOF packet, and if the condition is not satisfied Under the circumstance, adjust the oscillation device in real time to ensure the normal communication between the master and the slave.

The clock phase adjustment module 604 and the data processing and protocol analysis module 606 are basically the same as the clock phase adjustment module 104 and the data processing and protocol analysis module 106 shown in FIG. 1 , and the description is not repeated here.

FIG. 7 is a schematic diagram of a working process of a frequency adjustment method provided by an embodiment of the present disclosure. Referring to FIG. 7 , the working process of the frequency adjustment method includes the following steps.

Step S701, the slave is initialized, the RC oscillator unit and the PLL unit are configured, and a low-precision high-speed clock is generated.

Step S702, the host initiates a USB handshake, negotiates a USB protocol with the slave, and confirms the communication rate with the slave.

In some possible implementations, the USB protocol is a USB2.0 communication protocol or a USB3.0 communication protocol. Correspondingly, the USB interface is also an interface supporting the USB2.0 communication protocol or the USB3.0 communication protocol. The present disclosure does not limit the version of the USB communication protocol.

In step S703, both the master and the slave enter a normal working state.

Step S704, the host sends SOF packets to the slave according to the USB protocol at a specified time interval.

Step S705, in the case of receiving the current detection packet, the oscillation control device of the slave determines the interval between the transmission time of the current detection packet and the previous detection packet, and obtains the transmission interval.

Step S706, the oscillation control device determines the first working frequency of the master according to the sending interval of the SOF packet, and calculates the difference between the first working frequency and the second working frequency of the slave.

Step S707, when it is determined according to the difference value and the frequency threshold that the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency, the oscillation control device sends a frequency control signal to the oscillation device.

Step S708, the oscillating device adjusts the output frequency of the RC oscillating unit and/or the frequency multiplication adjustment parameter of the PLL unit according to the frequency control signal to obtain a third operating frequency.

Wherein, the difference between the third operating frequency and the first operating frequency is less than the frequency error threshold.

Step S709, the master sends a data packet to the slave, and the two communicate normally.

Step S710, during the working process, the oscillation control device continues to detect the sending interval of the SOF packet, and when it is determined that the difference between the third working frequency and the first working frequency is greater than or equal to the frequency error threshold The device makes instant adjustments.

It can be seen from this that the frequency adjustment method provided by the embodiment of the present disclosure is not only applicable to the adjustment of the slave machine from startup to the normal working state, but also to the adjustment of the slave machine during the normal working process. Through uninterrupted and continuous frequency adjustment , which can ensure normal information transmission between the slave and the host.

It can be understood that the above-mentioned method embodiments mentioned in the present disclosure can be combined with each other to form a combined embodiment without violating the principle and logic. Those skilled in the art can understand that, in the above method of the specific embodiment, the specific execution order of each step should be determined by its function and possible internal logic.

In addition, the present disclosure also provides an oscillation control device, an oscillation device, a slave machine, an electronic device, and a computer-readable storage medium, all of which can be used to implement any frequency adjustment method provided by the present disclosure, and the corresponding technical solutions and descriptions are referred to the method. Some of the corresponding records will not be repeated.

FIG. 8 is a block diagram of an oscillation control apparatus according to an embodiment of the present disclosure.

Referring to FIG. 8 , an embodiment of the present disclosure provides an oscillation control apparatus, and the oscillation control apparatus includes the following units.

The interval determining unit 801 is configured to determine the sending interval of detection packets sent by the host.

The frequency determining unit 802 is configured to determine the first operating frequency of the host according to the sending interval.

The generating unit 803 is configured to generate a frequency control signal when the frequency matching condition is not satisfied between the first working frequency and the second working frequency of the slave.

The sending unit 804 is used for sending the frequency control signal to the oscillating device, so that the oscillating device can adjust the working parameters according to the frequency control signal, so that the slave is adjusted from the second working frequency to the third working frequency, and the third working frequency is the same as the first working frequency. The frequency matching conditions are satisfied between the frequencies.

In some possible implementations, the detection packet may be a frame header packet sent by the master according to a transmission protocol pre-agreed with the slave.

In some possible implementations, the interval determination unit 801 is configured to determine the interval between the sending time of the current detection packet and the previous detection packet when the current detection packet is received, and obtain the transmission interval.

In some possible implementations, the oscillating device includes a resistor-capacitor oscillating unit and a phase-locked loop unit, and the operating parameters of the oscillating device include an output frequency of the resistor-capacitor oscillating unit and a frequency multiplication adjustment parameter of the phase-locked loop unit. Correspondingly, the oscillation control device further includes a determination unit, which is used to adjust the frequency according to the output frequency and frequency multiplication before generating the frequency control signal under the condition that the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency of the slave. parameter to determine the second operating frequency of the slave.

In some possible implementations, the frequency matching condition includes a frequency error threshold. Correspondingly, the oscillation control device further includes a difference calculation unit and a condition matching unit. Wherein, the difference calculation unit is used to determine the difference between the first operating frequency and the second operating frequency; the condition matching unit is used to determine whether frequency matching is satisfied between the first operating frequency and the second operating frequency according to the difference and the frequency error threshold condition.

According to the embodiment of the present disclosure, the oscillation control device can adjust the oscillation device in a timely and effective manner, so that the operating frequency of the slave machine and the operating frequency of the master machine satisfy the frequency matching condition, thereby ensuring normal communication between the slave machine and the master machine.

FIG. 9 is a block diagram of an oscillating device according to an embodiment of the present disclosure.

Referring to FIG. 9 , an embodiment of the present disclosure provides an oscillating device, and the oscillating device includes the following units.

The receiving unit 901 is configured to receive the frequency control signal sent by the oscillation control device.

The frequency control signal is a signal sent by the oscillation control device when the frequency matching condition is not satisfied between the first operating frequency of the master and the second operating frequency of the slave, and the first operating frequency is a signal sent by the oscillation control device according to the master. The frequency determined by the sending interval of the detection packet.

The adjustment unit 902 is configured to adjust the working parameters according to the frequency control signal, so that the slave is adjusted from the second working frequency to the third working frequency, and the frequency matching condition is satisfied between the third working frequency and the first working frequency.

In some possible implementations, the oscillation device further includes a parameter determination unit and an initialization unit. Wherein, the parameter determination unit is used for determining the working parameter according to the initial configuration information in response to the start instruction; the initialization unit is used for determining the second working frequency according to the working parameter, so that the slave machine works based on the second working frequency.

According to the embodiment of the present disclosure, the oscillating device can replace the external crystal oscillator to provide the frequency signal for the slave, thereby reducing the cost, and the oscillating device can timely and accurately adjust the frequency according to the instruction of the oscillation control device, so as to ensure the working frequency of the slave and the working frequency of the host. The frequency matching conditions are met between the frequencies, which ensures the normal communication between the slave and the master.

FIG. 10 is a block diagram of a slave provided by an embodiment of the present disclosure.

10 , an embodiment of the present disclosure provides a slave machine, the slave machine includes: at least one oscillation device 1001 ; and an oscillation control device 10012 connected to the at least one oscillation device 1001 .

The oscillation control device is used to implement the frequency adjustment method of any one of the embodiments of the present disclosure; the oscillation device is used to implement the frequency adjustment method of any one of the embodiments of the present disclosure.

According to the embodiments of the present disclosure, a low-cost oscillation device and an oscillation control device are provided inside the slave to replace the external crystal oscillator, which can effectively reduce the cost of the slave. Moreover, the oscillation control device is responsible for detecting the operating frequency of the slave and the operating frequency of the host. Whether the frequency matching conditions are met, and if the frequency matching conditions are not met, a frequency control signal is sent to the oscillating device, and the oscillating device adjusts the working parameters according to the frequency control signal, so that the working frequency of the slave is consistent with the working frequency of the host. The frequency matches the condition, so that the working frequency of the slave can be adjusted timely and accurately, and the normal communication between the master and the slave can be guaranteed.

FIG. 11 is a block diagram of an electronic device according to an embodiment of the present disclosure.

11 , an embodiment of the present disclosure provides an electronic device, the electronic device includes: at least one processor 1101 ; at least one memory 1102 , and one or more I/O interfaces 1103 connected between the processor 1101 and the memory 1102 wherein, the memory 1102 stores one or more computer programs executable by the at least one processor 1101, and the one or more computer programs are executed by the at least one processor 1101, so that the at least one processor 1101 can execute the above-mentioned Frequency adjustment method.

Embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, wherein the computer program implements the above-mentioned frequency adjustment method when executed by a processor/processing core. Computer-readable storage media can be volatile or non-volatile computer-readable storage media.

Embodiments of the present disclosure also provide a computer program product, including computer-readable codes, or a non-volatile computer-readable storage medium carrying computer-readable codes, when the computer-readable codes are stored in a processor of an electronic device During operation in the electronic device, the processor in the electronic device executes the above-mentioned frequency adjustment method.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, functional modules/units in the system, and the apparatus can be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components Components execute cooperatively. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on computer-readable storage media, which may include computer storage media (or non-transitory media) and communication media (or transitory media).

As is known to those of ordinary skill in the art, the term computer storage media includes both volatile and non-volatile memory media implemented in any method or technology for storage of information, such as computer readable program instructions, data structures, program modules or other data. volatile, removable and non-removable media. Computer storage media include, but are not limited to, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM), static random access memory (SRAM), flash memory or other memory technologies, portable Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical disk storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or which can be used to store desired information and which can be accessed by a computer any other medium. In addition, communication media typically embodies computer readable program instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery, as is well known to those of ordinary skill in the art medium.

The computer readable program instructions described herein may be downloaded to various computing/processing devices from a computer readable storage medium, or to an external computer or external storage device over a network such as the Internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and/or edge servers. A network adapter card or network interface in each computing/processing device receives computer-readable program instructions from a network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing/processing device .

The computer program instructions for carrying out the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or instructions in one or more programming languages. Source or object code written in any combination, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as the "C" language or similar programming languages. The computer readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server implement. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (eg, using an Internet service provider through the Internet connect). In some embodiments, custom electronic circuits, such as programmable logic circuits, field programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), can be personalized by utilizing state information of computer readable program instructions. Computer readable program instructions are executed to implement various aspects of the present disclosure.

The computer program product described herein may be embodied in hardware, software, or a combination thereof. In an optional embodiment, the computer program product is embodied as a computer storage medium, and in another optional embodiment, the computer program product is embodied as a software product, such as a software development kit (Software Development Kit, SDK), etc. .

Aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer readable program instructions.

These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer or other programmable data processing apparatus to produce a machine that causes the instructions when executed by the processor of the computer or other programmable data processing apparatus , resulting in means for implementing the functions/acts specified in one or more blocks of the flowchart and/or block diagrams. These computer readable program instructions can also be stored in a computer readable storage medium, these instructions cause a computer, programmable data processing apparatus and/or other equipment to operate in a specific manner, so that the computer readable medium on which the instructions are stored includes An article of manufacture comprising instructions for implementing various aspects of the functions/acts specified in one or more blocks of the flowchart and/or block diagrams.

Computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other equipment to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other equipment to produce a computer-implemented process , thereby causing instructions executing on a computer, other programmable data processing apparatus, or other device to implement the functions/acts specified in one or more blocks of the flowcharts and/or block diagrams.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more functions for implementing the specified logical function(s) executable instructions. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in dedicated hardware-based systems that perform the specified functions or actions , or can be implemented in a combination of dedicated hardware and computer instructions.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should only be construed in a general descriptive sense and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with other embodiments, unless expressly stated otherwise. Features and/or elements are used in combination. Accordingly, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present disclosure as set forth in the appended claims.

Claims (10)

1. A frequency adjustment method, characterized in that, applied to an oscillation control device of a slave machine, the slave machine comprising an oscillation device connected to the oscillation control device, the method comprising: Determine the sending interval of detection packets sent by the host; determining the first operating frequency of the host according to the sending interval; generating a frequency control signal when the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency of the slave; Send the frequency control signal to the oscillating device, so that the oscillating device can adjust the working parameters according to the frequency control signal, so that the slave can be adjusted from the second working frequency to the third working frequency, the The frequency matching condition is satisfied between the third operating frequency and the first operating frequency. 2 . The frequency adjustment method according to claim 1 , wherein the oscillating device comprises a resistance-capacitor oscillating unit and a phase-locked loop unit, and the operating parameters of the oscillating device include the output frequency and Frequency multiplication adjustment parameters of the phase-locked loop unit; In the case where the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency of the slave, before generating the frequency control signal, the method further includes: The second operating frequency of the slave is determined according to the output frequency and the frequency multiplication adjustment parameter. 3. The frequency adjustment method according to claim 1 or 2, wherein the frequency matching condition comprises a frequency error threshold; In the case where the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency of the slave, before generating the frequency control signal, the method further includes: determining the difference between the first operating frequency and the second operating frequency; According to the difference and the frequency error threshold, it is determined that the frequency matching condition is not satisfied between the first operating frequency and the second operating frequency. 4 . The frequency adjustment method according to claim 1 , wherein the detection packet is a frame header packet sent by the host according to a transmission protocol pre-agreed with the slave. 5 . 5. The frequency adjustment method according to claim 1, wherein the determining the sending interval of the detection packets sent by the host comprises: When the current detection packet is received, the interval between the transmission time of the current detection packet and the previous detection packet is determined, and the transmission interval is obtained. 6. A frequency adjustment method, characterized in that it is applied to an oscillating device of a slave, the slave comprising an oscillation control device connected to the oscillating device, the method comprising: receiving a frequency control signal sent by the oscillation control device; Wherein, the frequency control signal is a signal sent by the oscillation control device when the frequency matching condition is not satisfied between the first operating frequency of the master and the second operating frequency of the slave, and the first operating frequency a frequency determined by the oscillation control device according to the sending interval of the detection packets sent by the host; Adjust the working parameters according to the frequency control signal, so that the slave is adjusted from the second working frequency to the third working frequency, and the frequency matching condition is satisfied between the third working frequency and the first working frequency . 7 . The frequency adjustment method according to claim 6 , wherein before the receiving the frequency control signal sent by the oscillation control device, the method further comprises: 8 . In response to the start instruction, determine the working parameters according to the initial configuration information; A second working frequency is determined according to the working parameter, so that the slave machine works based on the second working frequency. 8. An oscillation control device, characterized in that the oscillation control device is arranged in a slave machine, the slave machine further comprises an oscillation device connected to the oscillation control device, and the oscillation control device comprises: an interval determining unit, used for determining the sending interval of the detection packet sent by the host; a frequency determining unit, configured to determine the first operating frequency of the host according to the sending interval; a generating unit, configured to generate a frequency control signal when a frequency matching condition is not satisfied between the first working frequency and the second working frequency of the slave; A sending unit, configured to send the frequency control signal to the oscillating device, so that the oscillating device can adjust working parameters according to the frequency control signal, so that the slave can be adjusted from the second working frequency to the third Working frequency, the frequency matching condition is satisfied between the third working frequency and the first working frequency. 9. An oscillating device, characterized in that the oscillating device is arranged in a slave machine, and the slave machine further comprises an oscillating control device connected to the oscillating device, the oscillating device comprising: a receiving unit, configured to receive the frequency control signal sent by the oscillation control device; Wherein, the frequency control signal is a signal sent by the oscillation control device when the frequency matching condition is not satisfied between the first operating frequency of the master and the second operating frequency of the slave, and the first operating frequency a frequency determined by the oscillation control device according to the sending interval of the detection packets sent by the host; An adjustment unit, configured to adjust working parameters according to the frequency control signal, so that the slave is adjusted from the second working frequency to a third working frequency, and the third working frequency and the first working frequency satisfy The frequency matches the condition. 10. A slave, characterized in that, comprising: at least one oscillatory device; and an oscillation control device connected to the at least one oscillation device; wherein, The oscillation control device is used to realize the frequency adjustment method according to any one of claims 1-5; The oscillating device is used to implement the frequency adjustment method as claimed in claim 6 or 7.

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