CN116909474B - Device identification method and related device - Google Patents

Abstract

The embodiment of the present application provides a device identification method and related apparatus, which are applied to electronic devices. The electronic device includes a master device storing a corresponding relationship and a slave device connected to the master device through an SPI bus, and the corresponding relationship includes the relationship between the slave device model, the first address, the first preset value, the second address and the second preset value. The method includes: the master device reads the value of the register in the slave device based on the slave device model and the corresponding relationship to obtain the first value and the second value corresponding to the first slave device model; if the first value and the second value are respectively the same as the first preset value and the second preset value corresponding to the first slave device model, the master device configures the slave device based on the first slave device model; before the master device configures the slave device, the value of the register corresponding to the second address corresponding to the first slave device model in the slave device is a fixed value. Two verification and identification are performed based on two addresses to reduce the misidentification of device models caused by the same value of the register at the same address, and reduce configuration failures.

Description

Device identification method and related device

This application is a divisional application. The application number of the original application is 202210380036.1, and the original application date is April 12, 2022. The entire contents of the original application are incorporated into this application by reference.

Technical Field

The present application relates to the field of terminal technology, and in particular to a device identification method and related apparatus.

Background technique

The serial peripheral interface (SPI) bus system is a synchronous serial peripheral interface, which is widely used in products such as integrated circuits and electronic devices. For example, the processor (CPU) in the electronic device can communicate with the peripheral devices in a serial manner through the SPI interface to exchange information, and then obtain information from the peripheral devices or control the peripheral devices to achieve one or more functions of the electronic device. The peripheral devices include but are not limited to: touch panels, sensors or displays, etc.

At present, in electronic devices, the processor (CPU) can be compatible with multiple models of peripheral devices through a set of SPI interfaces to improve the multiplexing rate of the SPI interface. Therefore, the processor needs to identify the model of the peripheral device connected through the SPI interface, and then perform corresponding initialization configuration based on the model.

However, during the identification process, misidentification may occur, resulting in incorrect initialization configuration of the slave device, making the peripheral device unusable, and worsening the user experience.

Summary of the invention

The embodiment of the present application provides a device identification method and related devices, and the master device can read the values of two different registers in the slave device based on the identification register address and an additional register address, and obtain the corresponding two values for verification. When the values of both times meet expectations, the device is successfully identified. In this way, a secondary identification is performed to reduce the situation where the device model is misidentified due to the same values corresponding to the registers of the same address in different models of slave devices, and then the initialization configuration of the slave device fails, thereby optimizing the user experience. In addition, the embodiment of the present application does not change the hardware structure of the electronic device, is cost-friendly, improves the flexibility of system design, and improves the stability of product material supply.

In the first aspect, an embodiment of the present application provides a device identification method. The method is applied to an electronic device, the electronic device includes a master device and a slave device, the master device is connected to the slave device via a serial peripheral interface SPI bus, the master device stores a corresponding relationship, the corresponding relationship includes the relationship between the slave device model, the first address, the first preset value, the second address and the second preset value, and any slave device model in the corresponding relationship corresponds to a first address, a first preset value, a second address and a second preset value.

The device identification method includes: the master device reads the value of the register in the slave device based on the first slave device model and the corresponding relationship to obtain the first value corresponding to the first slave device model and the second value corresponding to the first slave device model; when the master device determines that the first value corresponding to the first slave device model is the same as the first preset value corresponding to the first slave device model, and the second value corresponding to the first slave device model is the same as the second preset value corresponding to the first slave device model, the master device configures the slave device based on the first slave device model; before the master device configures the slave device based on the first slave device model, the third value is a fixed value, and the third value is the value of the register corresponding to the second type address corresponding to the first slave device model in the slave device.

The first address may be the address of the identification register, and the second address may be the address of the review register. In this way, two verifications and identifications are performed based on the two register addresses, which can reduce the misidentification of device models caused by the same values corresponding to registers of the same address in different models of slave devices, reduce the failure of slave device configuration, and optimize user experience. In addition, the embodiment of the present application does not change the hardware structure of the electronic device, is cost-friendly, improves the flexibility of system design, and improves the stability of product material supply.

Optionally, the master device reads the value of the register in the slave device based on the first slave device model and the corresponding relationship to obtain a first value corresponding to the first slave device model and a second value corresponding to the first slave device model, including: the master device reads the value of the register in the slave device based on a first address corresponding to the first slave device model to obtain the first value; the master device reads the value of the register in the slave device based on a second address corresponding to the first slave device model to obtain the second value.

Optionally, the master device reads the value of the register in the slave device based on the second address corresponding to the first slave device model to obtain the second value, including: when the master device determines that the first value is the same as the first preset value corresponding to the first slave device model, the master device reads the value of the register in the slave device based on the second address corresponding to the first slave device model to obtain the second value.

When the first value is the same as the first preset value, the master device reads and obtains the second value. In this way, when the first value is different from the first preset value, there is no need to judge the second value, thus saving computing resources.

Optionally, the method also includes: when the master device determines that the first value is inconsistent with the first preset value corresponding to the first slave device model, or the master device determines that the second value is inconsistent with the second preset value corresponding to the first slave device model, the master device reads the value of the register in the slave device based on the second slave device model and the corresponding relationship.

In this way, the model of the slave device can also be verified based on the model of the second slave device.

Optionally, when the second slave device model is the last model in the corresponding relationship and the master device does not recognize that the slave device is the second slave device model, the master device configures the slave device based on a preset model, and the preset model is any slave device model in the corresponding relationship.

In this way, the master device may successfully configure the slave device based on the preset model, so that the slave device can operate normally, thereby increasing the possibility that the master device can successfully configure the slave device.

Optionally, the master device configures the slave device based on the first slave device model, including: the master device writes an adjustment parameter corresponding to the first slave device model into a register of the slave device.

In this way, the adjustment parameters corresponding to the first slave device model are written into the register of the slave device, so that the slave device operates based on the adjustment parameters.

Optionally, before the master device reads the value of the register in the slave device based on the second address corresponding to the first slave device model, the method further includes: the master device controls the slave device to reset.

In this way, resetting the slave device will restore the value of the register in the slave device to the default value, which can reduce the recognition failure or misrecognition caused by the value corresponding to the review register being rewritten.

Optional, fixed non-zero value.

It is understandable that after most registers are powered on and reset, the register value reported is 0, and when the register is abnormal, the value reported is usually 0. In this way, selecting a non-zero register can further reduce misidentification and improve the stability of the embodiment of the present application.

Optionally, the registers corresponding to the second type of addresses include: control registers whose reading values are fixed and have not been subjected to read or write operations.

In this way, the situation of recognition failure caused by the change of the value in the register can be reduced, and the success rate of recognition can be improved.

Optionally, before the master device reads the value of the register in the slave device based on the first slave device model and the corresponding relationship, the master device switches from the second state to the first state, the second state is the power-off state, and the first state is the power-on state; or, the master device detects that the slave device switches from the second state to the first state.

Optionally, the corresponding relationship is stored in the main device in the form of a table.

Optionally, the main device includes but is not limited to: a processor CPU or a system-on-chip SOC, a microcontroller MCU, a microprocessor MPU or a programmable system on chip SOPC; the slave devices include but are not limited to: sensors, batteries, antennas, mobile communication modules, wireless communication modules, audio modules, speakers, receivers, microphones, headphones, buttons, motors, indicators, cameras, displays, and user identification modules.

The device identification method can be applied between a variety of master devices and slave devices and has a wide application range.

Optionally, the preset model may be the model corresponding to the slave device that is used most times in the electronic device, thereby increasing the possibility that the master device can successfully configure the slave device.

Optionally, the master device verifies the model of the slave device based on the first type address and/or the second type address for multiple times, thereby further reducing misidentification situations.

In a second aspect, an embodiment of the present application provides an electronic device, which includes a terminal device, and the terminal device may be: a mobile phone, a tablet computer, a laptop, a personal digital assistant (PDA), a mobile internet device (MID), a wearable device, a consumer electronic product, a laptop computer, a desktop computer, a car, an industrial control robot or industrial electronic equipment, etc.

The electronic device comprises: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the processor executes the method of the first aspect mentioned above.

The beneficial effects of the electronic device provided in the second aspect and each possible design of the second aspect can refer to the beneficial effects brought about by the first aspect and each possible structure of the first aspect, which will not be repeated here.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instructions are stored. When the computer program or instructions are executed, the method of the first aspect described above is implemented.

The beneficial effects of the computer-readable storage medium provided in the third aspect and each possible design of the third aspect can be referred to the beneficial effects brought about by the first aspect and each possible structure of the first aspect, which will not be repeated here.

In a fourth aspect, an embodiment of the present application provides a computer program product, including a computer program or instructions, which, when executed by a processor, implements the method of the first aspect.

The beneficial effects of the computer program product provided in the fourth aspect and each possible design of the fourth aspect can be referred to the beneficial effects brought about by the first aspect and each possible structure of the first aspect, which will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a connection between a master device and a slave device provided in an embodiment of the present application;

FIG2 is a schematic diagram of an application scenario provided by an embodiment of the present application;

FIG3 is a schematic diagram of a slave device structure provided in an embodiment of the present application;

FIG4 is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application;

FIG5 is a schematic diagram of a flow chart of a device identification method in a possible design;

FIG6 is a schematic diagram of a flow chart of a device identification method in a possible design;

FIG7 is a schematic diagram of a process flow of a device misidentification in a possible design;

FIG8 is a schematic diagram of a flow chart of a device identification method provided in an embodiment of the present application;

FIG. 9 is a schematic flow chart of a device identification method provided in an embodiment of the present application.

Detailed ways

In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. For example, the first device and the second device are only used to distinguish different devices, and their order is not limited. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit them to be different.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

It should be noted that the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

It is understood that the term "plurality" in this article refers to two or more than two. The term "and/or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character "/" indicates that the previous and next associated objects are in a "division" relationship.

It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

To facilitate understanding, some of the examples given are provided for reference to the description of concepts related to the embodiments of the present application.

1. SPI bus: A high-speed full-duplex synchronous serial communication interface. The SPI bus enables the processor to communicate with various peripheral devices in a serial manner to exchange data. The data transmission speed is faster than other serial interfaces, such as the universal asynchronous receiver/transmitter (UART) or the inter-integrated circuit (I2C) bus, and can reach about 10 megabits per second (Mbps).

The SPI bus works in a master-slave mode, and the master device can be connected to one or more slave devices via the SPI bus. Exemplarily, the processor can be connected to one or more slave devices in a sensor, a touch panel, a display screen, etc. via the SPI bus.

It should be noted that there is no response mechanism between the master device and the slave device during the communication process through the SPI bus. Specifically, after receiving a request from the master device, the enabled slave device transmits information to the master device; the slave device does not feed back a message to the master device indicating that the request has been received.

In possible design one, the SPI bus includes four transmission lines, namely, a serial clock line (SCLK), a master in/slave out data line (MISO), a master out/slave in data line (MOSI), and a low-level active slave select line (CS).

MISO is the data input of the master device and the data output of the slave device; MISO can also be called SOMI or SDO, etc. MOSI is the data output of the master device and the data input of the slave device; MOSI can also be called SIMO or SDO, etc. SCLK is the clock signal generated by the master device; CS is the enable signal of the slave device, which is controlled by the master device; CS can also be called SS or SSEL, etc. The embodiments of the present application do not limit this.

In the possible design 2, the SPI bus includes three transmission lines, namely, a serial clock line (serial clock, SCLK), a master output/master input data line (master output/master input, MOMI), and a low-level active slave select line (chip select, CS).

MOMI can also be called SISO. SCLK is a clock signal generated by the master device; CS is an enable signal of the slave device, controlled by the master device; CS can also be called SS or SSEL, etc. This embodiment of the application does not limit this.

It is understandable that, in the above two possible designs, the SPI bus can omit the CS transmission line and ground the pin used to connect the CS transmission line.

In the embodiment of the present application, the master device can be connected to the slave device through a four-wire SPI interface (as shown in a and b in Figure 1), or can be connected to the slave device through a three-wire SPI interface (as shown in c and d in Figure 1). In the embodiment of the present application, the master device can also be connected to one or more slave devices through a group of SPI interfaces (as shown in e and f in Figure 1).

It should be noted that when the master device is connected to the slave device through a group of SPI interfaces, the master device can selectively enable different slave devices connected to the SPI interfaces through different CS signals. However, at the same time, only one slave device among the slave devices corresponding to a group of SPI interfaces is in an enabled state and can be enabled.

It is understandable that a group of SPI interfaces can reserve multiple slave device positions to connect multiple slave devices, or reserve one slave device position to connect one slave device (slave devices of different models but the same package may be attached to this position).

It should be noted that the master device can be compatible with slave devices of the same type and different models through the SPI interface, and can also be compatible with slave devices of different types. In this way, the supplyability of product materials can be improved and the interface reuse rate can be increased.

It is understandable that due to differences in device principles, internal structures, software implementations, etc. among devices of different models, when the SPI interface is compatible with multiple slave device connections, the master device needs to identify the type and model of the slave device connected to the SPI interface before configuring the slave device, and perform initialization configuration based on the type and model of the slave device.

2. Polling: It is a way for a master device to decide how to provide services to a slave device. Specifically, the master device sends out a query to identify the slave device according to the possible model of the slave device; if the master device identifies the slave device based on the first slave device model, it initializes the configuration based on the first slave device model; if the slave device is not identified based on the first slave device model, it identifies the slave device based on the second slave device model, and then repeats the process until the slave device is identified or the slave device is identified based on the last model. Polling can also be called "programmed I/O".

In an embodiment of the present application, the master device sends inquiries to the slave device in the order of pre-stored identification registers. When the value of the slave device read by the master device is consistent with the preset value corresponding to the device identification, the master device identifies the slave device and configures the slave device.

3. Reset (power on reset, POR): refers to the process in which the registers in the device return to their initial state when the device is powered on for the first time or after power failure. For example, when an electronic device is turned on, both the master device and the slave device may be in the initial state and start working from the initial state.

The application scenarios of the embodiments of the present application are described below with reference to the accompanying drawings.

For example, Fig. 2 is a schematic diagram of an application scenario provided by an embodiment of the present application. As shown in Fig. 2, the electronic device includes a master device 101 and a slave device 102. The master device 101 and the slave device 102 are connected via an SPI bus.

The master device 101 is used to obtain data from the slave device 102 and/or control the slave device 102 through the SPI bus, thereby realizing one or more functions of the electronic device. For example, taking the master device as a CPU and the slave device as a temperature sensor as an example, the CPU obtains the temperature detected by the temperature sensor through the SPI bus and executes a temperature processing strategy based on the temperature. The CPU can also adjust the detection frequency of the temperature sensor through the SPI bus.

In the embodiment of the present application, the master device 101 can be compatible with multiple models of slave devices through the SPI bus. However, the device principles, internal structures, software implementations, etc. corresponding to different models of slave devices may be different. Therefore, after the master device is powered on or the slave device is powered on, the master device needs to identify the model of the slave device to initialize and configure the slave device, thereby realizing one or more functions of the electronic device.

Specifically, the master device 101 can read or rewrite the value of the register in the slave device 102 through the SPI bus to achieve identification of the model of the slave device 102, acquisition and control of data, etc.

For ease of understanding, the structure of the slave device 102 is described below in conjunction with FIG. 3 .

The slave device 102 includes a plurality of registers, including but not limited to control registers, status registers, function registers and identification registers.

Control registers are used to control and determine the operating mode of the slave device and the working characteristics of the slave device.

Status registers are used to store two types of information: one type of information is various status information (condition codes) that reflect the results of instruction execution, such as whether there is a carry (CF bit), whether there is an overflow (OV bit), whether the result is positive or negative (SF bit), whether the result is zero (ZF bit), parity flag (P bit), etc.; the other type of information is control information, such as enabling interrupts (IF bit), tracking flag (TF bit), etc.

Functional registers are used to store control commands, status or data of corresponding functional components.

The identification register is used to store the device identification so that the master device can distinguish the type of slave device.

It is understandable that each register in the slave device corresponds to an address, and registers corresponding to different addresses have different functions. Exemplarily, as shown in FIG3 , the slave device includes multiple registers, namely register 01, register 02, register 03, etc. Taking the slave device as a temperature sensor as an example, register 01 can be a status register for storing status information of whether the temperature is abnormal; register 02 can be a control register for storing the detected frequency; register 03 can be an identification register for storing the device identification. The slave device shown in FIG3 can also include a function register for storing the detected temperature.

In addition, the number of registers corresponding to different models of slave devices may be different. The registers corresponding to the same address may be different. For example, register 01 in Figure 3 can be an identification register for storing the device identification. Register 02 can be a status register for storing status information on whether the temperature is abnormal; register 03 can be a control register for storing the frequency of detection. The embodiment of the present application does not limit the specific functions of the registers in the slave device and the addresses of the registers corresponding to each function.

In the embodiment of the present application, the main device 101 can be a processor (central processing unit, CPU), a system on chip (system on chip, SOC), a microcontroller (micro control unit, MCU), a microprocessor (MPU) and a programmable system on a chip (system-on-a-programmable-chip, SOPC), etc. in an electronic device.

The slave device 102 may be a peripheral device in an electronic device. The peripheral device may be specifically described in the hardware architecture of the electronic device in FIG. 4 below, and will not be described in detail here.

Exemplarily, Figure 4 is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application. As shown in Figure 4, the electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and/or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

The processor 110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may store instructions or data that the processor 110 has just used or cyclically used. If the processor 110 needs to use the instruction or data again, it may be called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

In some embodiments, the processor 110 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C or IIC) interface, a serial peripheral interface (SPI), an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (SIM) interface, and/or a universal serial bus (USB) interface, etc.

The I2C interface is a bidirectional synchronous serial bus, including a serial data line (SDA) and a serial clock line (SCL). In some embodiments, the processor 110 may include multiple groups of I2C buses. The processor 110 may be coupled to the touch sensor 180K, the charger, the flash, the camera 193, etc. through different I2C bus interfaces. For example: the processor 110 may be coupled to the touch sensor 180K through the I2C interface, so that the processor 110 communicates with the touch sensor 180K through the I2C bus interface, thereby realizing the touch function of the electronic device 100.

The SPI interface is a high-speed synchronous serial communication bus, and the specific structure can refer to the description of the above-mentioned related concepts. In some embodiments, the processor 110 may include multiple groups of SPI buses. The processor 110 can be coupled to peripheral devices such as the temperature sensor 180J, the charger, the flash, the camera 193, etc. through different SPI bus interfaces. For example: the processor 110 can be coupled to the temperature sensor 180J through the SPI interface, so that the processor 110 communicates with the temperature sensor 180J through the SPI bus interface, and the electronic device 100 executes a temperature processing strategy based on the temperature detected by the temperature sensor 180J to achieve a temperature adjustment function.

The I2S interface can be used for audio communication. In some embodiments, the processor 110 can include multiple I2S buses. The processor 110 can be coupled to the audio module 170 via the I2S bus to achieve communication between the processor 110 and the audio module 170. In some embodiments, the audio module 170 can transmit an audio signal to the wireless communication module 160 via the I2S interface to achieve the function of answering a call through a Bluetooth headset.

The PCM interface can also be used for audio communication, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 170 and the wireless communication module 160 can be coupled via a PCM bus interface. In some embodiments, the audio module 170 can also transmit audio signals to the wireless communication module 160 via the PCM interface to realize the function of answering calls via a Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.

The UART interface is a universal serial data bus for asynchronous communication. The bus can be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, the UART interface is generally used to connect the processor 110 and the wireless communication module 160. For example, the processor 110 communicates with the Bluetooth module in the wireless communication module 160 through the UART interface to implement the Bluetooth function. In some embodiments, the audio module 170 can transmit an audio signal to the wireless communication module 160 through the UART interface to implement the function of playing music through a Bluetooth headset.

The MIPI interface can be used to connect the processor 110 with peripheral devices such as the display screen 194 and the camera 193. The MIPI interface includes a camera serial interface (CSI), a display serial interface (DSI), etc. In some embodiments, the processor 110 and the camera 193 communicate via the CSI interface to implement the shooting function of the electronic device 100. The processor 110 and the display screen 194 communicate via the DSI interface to implement the display function of the electronic device 100.

The GPIO interface can be configured by software. The GPIO interface can be configured as a control signal or as a data signal. In some embodiments, the GPIO interface can be used to connect the processor 110 with the camera 193, the display 194, the wireless communication module 160, the audio module 170, the sensor module 180, etc. The GPIO interface can also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, etc.

The USB interface 130 is an interface that complies with the USB standard specification, and specifically can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 130 can be used to connect a charger to charge the electronic device 100, and can also be used to transfer data between the electronic device 100 and a peripheral device. It can also be used to connect headphones to play audio through the headphones. The interface can also be used to connect other electronic devices, such as AR devices, etc.

It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present application is a schematic illustration and does not constitute a structural limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

The charging management module 140 is used to receive charging input from a charger, where the charger can be a wireless charger or a wired charger.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the display screen 194, the camera 193, and the wireless communication module 160. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle number, battery health status (leakage, impedance), etc. In some other embodiments, the power management module 141 can also be set in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 can also be set in the same device.

The wireless communication function of the electronic device 100 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.

Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. The antennas in electronic device 100 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antennas.

The mobile communication module 150 can provide solutions for wireless communications including 2G/3G/4G/5G, etc., applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, and filter, amplify, etc. the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation.

The wireless communication module 160 can provide wireless communication solutions for application in the electronic device 100, including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication technology (NFC), infrared technology (IR), etc.

The electronic device 100 implements the display function through a GPU, a display screen 194, and an application processor. The GPU is a microprocessor for image processing, which connects the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 194 is used to display images, display videos, and receive sliding operations, etc. The display screen 194 includes a display panel. In some embodiments, the electronic device 100 may include 1 or N display screens 194, where N is a positive integer greater than 1.

The electronic device 100 can realize the shooting function through ISP, camera 193, video codec, GPU, display screen 194 and application processor.

The ISP is used to process the data fed back by the camera 193. For example, when taking a photo, the shutter is opened, and light is transmitted to the camera photosensitive element through the lens, and the light signal is converted into an electrical signal. The camera photosensitive element transmits the electrical signal to the ISP for processing and converts it into an image visible to the naked eye. In some embodiments, the ISP can be set in the camera 193.

The camera 193 is used to capture still images or videos. In some embodiments, the electronic device 100 may include 1 or N cameras 193, where N is a positive integer greater than 1.

The digital signal processor is used to process digital signals, and can process not only digital image signals but also other digital signals. For example, when the electronic device 100 is selecting a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy.

The video codec is used to compress or decompress digital video. The electronic device 100 may support one or more video codecs. In this way, the electronic device 100 may play or record videos in multiple coding formats.

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function, such as storing music, video and other files in the external memory card.

The internal memory 121 can be used to store computer executable program codes, and the executable program codes include instructions. The internal memory 121 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the electronic device 100 (such as audio data, a phone book, etc.), etc. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 110 executes various functional applications and data processing of the electronic device 100 by running instructions stored in the internal memory 121, and/or instructions stored in a memory provided in the processor.

The electronic device 100 can implement audio functions such as music playing and recording through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone jack 170D, and the application processor.

The audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio module 170 can also be used to encode and decode audio signals. In some embodiments, the audio module 170 can be arranged in the processor 110, or some functional modules of the audio module 170 can be arranged in the processor 110.

The speaker 170A, also called a "speaker", is used to convert an audio electrical signal into a sound signal. The electronic device 100 can listen to music or listen to a hands-free call through the speaker 170A.

The receiver 170B, also called a "earpiece", is used to convert audio electrical signals into sound signals. When the electronic device 100 receives a call or voice message, the voice can be received by placing the receiver 170B close to the human ear.

Microphone 170C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can speak by putting their mouth close to microphone 170C to input the sound signal into microphone 170C. The electronic device 100 can be provided with at least one microphone 170C. In other embodiments, the electronic device 100 can be provided with two microphones 170C, which can not only collect sound signals but also realize noise reduction function. In other embodiments, the electronic device 100 can also be provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify the sound source, realize directional recording function, etc.

The earphone interface 170D is used to connect a wired earphone and can be a USB interface 130 or a 3.5 mm open mobile terminal platform (OMTP) standard interface or a cellular telecommunications industry association of the USA (CTIA) standard interface.

The pressure sensor 180A is used to sense the pressure signal and can convert the pressure signal into an electrical signal. In some embodiments, the pressure sensor 180A can be set on the display screen 194. There are many types of pressure sensors 180A, such as resistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, etc. A capacitive pressure sensor can be a parallel plate including at least two conductive materials. When a force acts on the pressure sensor 180A, the capacitance between the electrodes changes. The electronic device 100 determines the intensity of the pressure based on the change in capacitance. When a touch operation acts on the display screen 194, the electronic device 100 detects the intensity of the touch operation based on the pressure sensor 180A. The electronic device 100 can also calculate the position of the touch based on the detection signal of the pressure sensor 180A. In some embodiments, touch operations acting on the same touch position but with different touch operation intensities can correspond to different operation instructions.

The gyro sensor 180B can be used to determine the motion posture of the electronic device 100. In some embodiments, the angular velocity of the electronic device 100 around three axes (i.e., x, y, and z axes) can be determined by the gyro sensor 180B. The gyro sensor 180B can be used for anti-shake shooting. For example, when the shutter is pressed, the gyro sensor 180B detects the angle of the electronic device 100 shaking, calculates the distance that the lens module needs to compensate based on the angle, and allows the lens to offset the shaking of the electronic device 100 through reverse movement to achieve anti-shake. The gyro sensor 180B can also be used for navigation and somatosensory game scenes.

The air pressure sensor 180C is used to measure air pressure. In some embodiments, the electronic device 100 calculates the altitude through the air pressure value measured by the air pressure sensor 180C to assist in positioning and navigation.

The magnetic sensor 180D includes a Hall sensor. The electronic device 100 can use the magnetic sensor 180D to detect the opening and closing of the flip leather case. In some embodiments, when the electronic device 100 is a flip phone, the electronic device 100 can detect the opening and closing of the flip cover according to the magnetic sensor 180D. Then, according to the detected opening and closing state of the leather case or the opening and closing state of the flip cover, the flip cover can be automatically unlocked.

The acceleration sensor 180E can detect the magnitude of the acceleration of the electronic device 100 in all directions (generally three axes). When the electronic device 100 is stationary, the magnitude and direction of gravity can be detected. It can also be used to identify the posture of the terminal device and is applied to applications such as horizontal and vertical screen switching and pedometers.

The distance sensor 180F is used to measure the distance. The electronic device 100 can measure the distance by infrared or laser. In some embodiments, when shooting a scene, the electronic device 100 can use the distance sensor 180F to measure the distance to achieve fast focusing.

The proximity light sensor 180G may include, for example, a light emitting diode (LED) and a light detector, such as a photodiode. The light emitting diode may be an infrared light emitting diode. The electronic device 100 emits infrared light outward through the light emitting diode. The electronic device 100 uses a photodiode to detect infrared reflected light from nearby objects. When sufficient reflected light is detected, it can be determined that there is an object near the electronic device 100. When insufficient reflected light is detected, the electronic device 100 can determine that there is no object near the electronic device 100. The electronic device 100 can use the proximity light sensor 180G to detect that the user holds the electronic device 100 close to the ear to talk, so as to automatically turn off the screen to save power. The proximity light sensor 180G can also be used in leather case mode and pocket mode to automatically unlock and lock the screen.

The ambient light sensor 180L is used to sense the brightness of the ambient light. The electronic device 100 can adaptively adjust the brightness of the display screen 194 according to the perceived ambient light brightness. The ambient light sensor 180L can also be used to automatically adjust the white balance when taking pictures. The ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the electronic device 100 is in a pocket to prevent accidental touches.

The fingerprint sensor 180H is used to collect fingerprints. The electronic device 100 can use the collected fingerprint characteristics to implement fingerprint unlocking, access application locks, fingerprint photography, fingerprint call answering, etc.

The temperature sensor 180J is used to detect temperature. In some embodiments, the electronic device 100 uses the temperature detected by the temperature sensor 180J to execute a temperature processing strategy. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold, the electronic device 100 reduces the performance of a processor located near the temperature sensor 180J to reduce power consumption and implement thermal protection. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 heats the battery 142 to avoid abnormal shutdown of the electronic device 100 due to low temperature. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 boosts the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.

The touch sensor 180K is also called a "touch control device". The touch sensor 180K can be set on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, also called a "touch control screen". The touch sensor 180K is used to detect touch operations acting on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through the display screen 194. In other embodiments, the touch sensor 180K can also be set on the surface of the electronic device 100, which is different from the position of the display screen 194.

The bone conduction sensor 180M can obtain a vibration signal. In some embodiments, the bone conduction sensor 180M can obtain a vibration signal of a vibrating bone block of the vocal part of the human body. The bone conduction sensor 180M can also contact the human pulse to receive a blood pressure beat signal. In some embodiments, the bone conduction sensor 180M can also be set in an earphone and combined into a bone conduction earphone. The audio module 170 can parse out a voice signal based on the vibration signal of the vibrating bone block of the vocal part obtained by the bone conduction sensor 180M to realize a voice function. The application processor can parse the heart rate information based on the blood pressure beat signal obtained by the bone conduction sensor 180M to realize a heart rate detection function.

The key 190 includes a power key, a volume key, etc. The key 190 may be a mechanical key or a touch key. The electronic device 100 may receive key input and generate key signal input related to user settings and function control of the electronic device 100.

Motor 191 can generate vibration prompts. Motor 191 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. For example, touch operations acting on different applications (such as taking pictures, audio playback, etc.) can correspond to different vibration feedback effects. For touch operations acting on different areas of the display screen 194, motor 191 can also correspond to different vibration feedback effects. Different application scenarios (for example: time reminders, receiving messages, alarm clocks, games, etc.) can also correspond to different vibration feedback effects. The touch vibration feedback effect can also support customization.

The indicator 192 may be an indicator light, which may be used to indicate the charging status, power changes, messages, missed calls, notifications, etc.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be connected to and separated from the electronic device 100 by inserting it into the SIM card interface 195 or pulling it out from the SIM card interface 195. The electronic device 100 can support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support Nano SIM cards, Micro SIM cards, SIM cards, and the like. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the multiple cards can be the same or different. The SIM card interface 195 can also be compatible with different types of SIM cards. The SIM card interface 195 can also be compatible with external memory cards. The electronic device 100 interacts with the network through the SIM card to implement functions such as calls and data communications. In some embodiments, the electronic device 100 uses an eSIM, i.e., an embedded SIM card. The eSIM card can be embedded in the electronic device 100 and cannot be separated from the electronic device 100.

In the electronic device shown in FIG. 4 above, the master device may be a processor, and the slave device may be a peripheral device, for example, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

The device identification method provided in the embodiment of the present application can be applied to electronic devices with SPI interfaces. Electronic devices include terminal devices. Terminal devices can also be called terminals, user equipment (UE), mobile stations (MS), mobile terminals (MT), etc. Terminal devices can be mobile phones, smart TVs, wearable devices, tablet computers (Pad), computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.

As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

In addition, in the embodiments of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.

The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.

When an electronic device receives an operation for instructing power on, the processor in the electronic device needs to identify the model of the peripheral device connected via the SPI bus, so as to initialize and configure the peripheral device accordingly based on the device model, thereby realizing the corresponding function of the electronic device.

In a possible design, the processor reads the device identification (chip id) of the peripheral device by polling to realize the model identification of the peripheral device, and then performs corresponding initialization configuration on the peripheral device. Specifically, when the electronic device receives an operation for instructing power on, the master device reads the value stored in the corresponding register in the slave device according to the polling order and the corresponding relationship. When the value read by the master device is the same as the preset value, the master device identifies the slave device. When the value read by the master device is different from the preset value, the register of the next type of corresponding slave device is read based on the polling order until the slave device is identified or the last slave device is polled. When the last slave device is polled, the slave device is not identified, and the slave device identification fails.

Exemplarily, FIG5 is a flow chart of a possible method for identifying a device in a design. As shown in FIG5, the method includes:

S401: When the electronic device receives an operation for instructing power on, the master device reads the value of the register in the slave device based on the model sequence and the corresponding relationship.

It is understandable that the master device may be compatible with multiple slave devices via the SPI bus. The master device reads the values of the corresponding registers in the slave device according to the order and correspondence of the preset models to confirm the model of the slave device.

In the embodiment of the present application, the corresponding relationship is the relationship between the slave device model, the identification (chip id) register address and the preset value. The polling order corresponds to the slave device model.

In a possible implementation, the corresponding relationship may be stored in the master device in the form of a table. For example, the corresponding relationship between the slave device model, the identification register address, and the preset value is shown in Table 1.

Table 1 Correspondence table

model Identification register address default value A 0×00 11 B 0×01 12

As can be seen from Table 1, the identification register address corresponding to model A is 0×00, that is, the identification register corresponding to model A is register 0×00, and the preset value is 11. It can be understood that the master device can identify whether the slave device is model A based on the value corresponding to register 0×00 of the slave device and the preset value. When the master device identifies the slave device as model A based on the value corresponding to register 0×00 of the slave device is 11, the master device identifies the slave device as model A; when the master device identifies the slave device as not model A based on the value corresponding to register 0×00 of the slave device is not 11.

The identification register corresponding to the B model is the 0×01 register, that is, the identification register corresponding to the B model is the 0×01 register preset value is 12. It can be understood that the master device can identify whether the slave device is a B model based on the value corresponding to the 0×01 register of the slave device and the preset value. When the master device identifies the slave device as a B model based on the value corresponding to the 0×01 register of the slave device is 12; when the master device identifies the slave device as not a B model based on the value corresponding to the 0×01 register of the slave device is not 12.

S402: When the value read by the master device is the same as the preset value, the master device recognizes the slave device.

Adaptively, after the master device recognizes the slave device, it initializes and configures the slave device.

Exemplarily, taking the slave device as a temperature sensor as an example, the master device configures a new value in a register in the temperature sensor. For example, the value is used to indicate the frequency of the temperature sensor collecting the temperature in the environment.

S403: When the value of the slave device read by the master device is different from the preset value, the master device confirms whether the polling is completed.

When the master device does not poll the last model of the slave device, the master device executes S401. When the master device polls the last model of the slave device, the master device fails to identify the slave device.

For example, taking the slave devices of type A and type B that are compatible with the SPI interface as an example, as shown in FIG6 , the identification process is as follows:

S501: When the electronic device receives an operation for instructing power on, the master device reads the value of the register in the slave device based on the register address corresponding to model A.

Exemplarily, the master device reads the identification register corresponding to model A, that is, register 0×00.

S502: When the value read by the master device is the same as the preset value corresponding to model A, the master device identifies the slave device as model A.

Adaptively, the master device initializes the slave device based on the A model.

S503: When the value read by the master device is different from the preset value corresponding to model A, the master device reads the value of the register in the slave device based on the register address corresponding to model B.

S504: When the value read by the master device is the same as the preset value corresponding to the B model, the master device identifies the slave device as the B model.

Adaptively, the master device initializes the slave device based on the B model.

S505: When the value read by the master device is different from the preset value corresponding to model B, the master device fails to identify the slave device.

The master device reads the value of the corresponding register in the slave device based on the identification register address corresponding to the first slave device model; when the value read by the master device is the same as the preset value in the corresponding relationship, the master device identifies the slave device as the first slave device model. When the value read by the master device is different from the preset value in the corresponding relationship, the master device reads the value of the corresponding register in the slave device based on the identification register address corresponding to the next model until the slave device is identified or the last slave device is polled. When the last model of the slave device is polled, the master device does not identify the slave device, and the slave device identification fails.

However, in the processes shown in FIG. 5 and FIG. 6 , the master device may make an error when identifying the slave device, thereby rendering the slave device unusable and the corresponding functions of the electronic device unusable, resulting in a poor user experience.

For example, taking the example of a master device being compatible with a model A slave device and a model B slave device through an SPI interface, the master device may identify the model B slave device as a model A slave device. Specifically, when the master device reads the value of the register in the slave device based on the register address corresponding to the model A, the value corresponding to the corresponding register in the model B slave device is the same as the preset value corresponding to the model A.

For ease of understanding, a register list corresponding to two models in the slave device is given as an example.

Table 2 Register List

model Register Address value A 0×00 11 0×01 13 B 0×00 reserved 0×01 12

It should be noted that some registers in the slave device are reserved registers, which can be understood as undisclosed registers. Reserved registers may be registers that are only used for debugging during the device design and development stage; they may also be registers that have functions in the device design, but the corresponding functions cannot be realized due to production process and other issues.

It is understandable that the value corresponding to the reserved register may be one fixed value, may be a random value, or may correspond to multiple fixed values.

The misidentification process is described below in conjunction with Table 2 and Figure 7. For example, taking the slave device model as Model B and the master device identifying the slave device in the order of Model A and Model B, the identification process includes:

S601: When the electronic device receives an operation for instructing power on, the master device reads the value of the register in the slave device based on the register address corresponding to model A.

Exemplarily, the master device reads the identification register corresponding to model A, that is, register 0×00.

S602: When the value fed back by the slave device is the same as the preset value corresponding to model A, the master device identifies the slave device as model A.

Adaptively, the master device is initialized based on model A.

For example, when the slave device is model B, the 0×00 register is a reserved register, and its corresponding value may also be 11. Therefore, the value fed back by the slave device is 11, which is the same as the preset value corresponding to model A. The master device mistakenly identifies the slave device as model A.

When the master device is initialized and configured based on model A, it may cause an initialization configuration error of the slave device, and then the slave device cannot operate normally and the corresponding functions become invalid.

In view of this, an embodiment of the present application provides a device identification method, in which the master device can read the values of two different registers in the slave device, obtain the corresponding two values for verification, and when both values meet expectations, the device identification is successful. In this way, secondary identification is performed to reduce the situation where the device misidentifies and fails to initialize the configuration due to the same values corresponding to the same address registers in different models of slave devices, thereby optimizing the user experience. In addition, the hardware structure of the electronic device is not changed, which is cost-friendly, improves the flexibility of system design, and improves the stability of product material supply.

The device identification method provided in the embodiment of the present application is described below with reference to the accompanying drawings.

Exemplarily, FIG8 is a schematic flow chart of a slave device identification method provided in an embodiment of the present application. As shown in FIG8 , the method includes:

S701. When the electronic device is powered on and initialized, the master device reads the value of the register in the slave device based on the order of the slave device models and the corresponding relationship to obtain the first value and/or the second value; the corresponding relationship includes the relationship between the slave device model, the first address, the first preset value, the second address and the second preset value.

It is understandable that when the electronic device is turned on, the master device switches from a power-off state to a power-on state and starts to identify the slave device.

In the embodiment of the present application, the first address may be an address corresponding to an identification register corresponding to different models of slave devices, and the second address may be an address corresponding to a review register corresponding to different models of slave devices. The identification register is a register for storing device identification, which is used to distinguish device models. The review register is a register for verifying the device model.

For example, taking the slave device models A and B as an example, the identification register address corresponding to model A is 0×00, and the first preset value is 11; the review register address corresponding to model A is 0×01, and the second preset value is 12. The identification register address corresponding to model B is 0×01 register, and the first preset value is 12; the review register address corresponding to model B is 0×02, and the second preset value is 14.

It can be understood that one of the multiple registers in the slave device can be identified by the address, and the address can also be understood as the register number.

In a possible implementation, the above correspondence relationship may be stored in the master device in the form of a table, as shown in Table 3 for example.

Table 3 Correspondence table

It is understandable that the master device reads the value of the register in the slave device based on the first address and the second address to obtain the first value and the second value. In the embodiment of the present application, the master device may first read the value of the register in the slave device based on the first address to obtain the first value; or may first read the value of the register in the slave device based on the second address to obtain the second value. This is not limited here.

In the embodiment of the present application, the second addresses corresponding to slave devices of different models may be the same or different, and the embodiment of the present application is not limited to this.

It is understandable that the master device can be compatible with multiple slave devices via the SPI bus. The master device reads the values of the corresponding registers in the slave device according to the order and correspondence of the preset models to confirm the model of the slave device.

S702: When the first value is the same as the first preset value and the second value is the same as the second preset value, the master device identifies the slave device and initializes the configuration of the slave device based on the model. The second value is a fixed value before the master device configures the slave device.

S703: When the first value is different from the first preset value or the second value is different from the second preset value, the master device confirms whether the polling is completed.

Exemplarily, the master device confirms whether the polling is completed based on the model order. When the master device does not read the value of the register in the slave device based on the last model and the corresponding relationship, the polling is not completed, and the master device executes S701 until the slave device is identified or the polling is completed. When the master device reads the value of the register in the slave device based on the last model and the corresponding relationship, the polling is completed, and the master device fails to identify the slave device.

In a possible implementation, when the master device fails to identify the slave device, the master device configures the slave device based on a preset model.

In a possible implementation, the master device controls the slave device to reset before reading the value of the register in the slave device to obtain the second value based on the model sequence and the corresponding relationship.

In summary, the master device performs verification by reading the values of two different registers in the slave device. In this way, the probability of the same address registers in different models of slave devices corresponding to the same value is reduced, and the device misidentification is reduced. In addition, the hardware structure of the electronic device is not changed, which is cost-friendly, improves the flexibility of system design, and improves the stability of product material supply.

The following is a description of a device identification method during the initialization of an electronic device when it is powered on, in conjunction with FIG9 .

S801: When the electronic device receives an operation for instructing power on, the master device reads the value of the register in the slave device based on the identification register address corresponding to model A to obtain a first value corresponding to model A.

It is understandable that the master device is connected to multiple slave devices via the SPI bus. The master device confirms the model of the slave device by polling according to the preset polling order and corresponding relationship. The corresponding relationship is the relationship between the slave device model, the identification register address, the first preset value, the review register address and the second preset value. The polling order corresponds to the slave device model.

In a possible implementation, the corresponding relationship may be stored in the master device in the form of a table. For example, the corresponding relationship between the slave device model, the identification register address, the first preset value, the review register address and the second preset value may be as shown in Table 3 above.

As can be seen from Table 3, the identification register address corresponding to model A is 0×00, and the first preset value is 11; the review register address corresponding to model A is 0×01, and the second preset value is 12. The identification register address corresponding to model B is 0×01 register, and the first preset value is 12; the review register address corresponding to model B is 0×02, and the second preset value is 14.

It can be understood that when the master device reads the value of the 0×00 register of the slave device and obtains a first value of 11, and the master device reads the value of the 0×01 register of the slave device and obtains a second value of 13, the slave device is model A. When the master device reads the value of the 0×01 register of the slave device and obtains a first value of 12, and the master device reads the value of the 0×02 register of the slave device and obtains a second value of 14, the slave device is model B.

In the embodiment of the present application, the double check register is different from the identification register, and the address corresponding to the double check register is different from the address corresponding to the identification register.

In the embodiment of the present application, the addresses of the review registers corresponding to slave devices of different models may be the same or different, and the embodiment of the present application is not limited to this.

In a possible implementation, the addresses of the review registers corresponding to slave devices of different models are the same, but the corresponding second preset values are different.

In this way, the address of the recheck register is the same, and the master device can distinguish different types of slave devices by reading the register once. In addition, the risk of misidentification can be reduced.

In the embodiment of the present application, the double check register may be a stable register after power-on, or an unstable register.

It is to be understood that the unstable registers may be reserved registers, registers whose values are modified, and the like.

Some registers may be read and written during device operation, resulting in the modification of the corresponding value of the register. The register may be a register for data output, a register for indicating mode switching, a register for indicating abnormal conditions, etc.

Exemplarily, taking a temperature sensor as an example, an unstable register may be: a register for storing detected temperature, an undisclosed reserved register, and the like.

A stable register may be: a register whose value has not been modified, such as a control register whose value is fixed and has not been read or written during the use of the slave device.

Exemplarily, taking the temperature sensor as an example, the stable register may be: an interrupt control register, which has a fixed and non-zero value after power-on reset. The interrupt control register is used to control the enabling of the interrupt function. The processor has not operated the interrupt control register. It can be foreseen that the register value is fixed after the temperature sensor is powered on and stabilized.

In a possible implementation, the double check register is a register that is stable after power-on, so as to reduce the situation of recognition failure caused by the change of the value in the register and improve the success rate of recognition.

In a possible implementation, the review register is a non-zero register. It is understandable that after most registers are powered on and reset, the register value reported is 0, and when the register is abnormal, the value reported is usually 0. In this way, selecting a non-zero register can further reduce misidentification and improve the stability of the embodiment of the present application.

In a possible implementation, the review register is a register whose reported value is fixed and non-zero after power-on, so as to reduce the situation of recognition failure caused by the value in the register being changed, and improve the success rate of recognition.

S802: When the first value corresponding to model A is the same as the first preset value corresponding to model A, the master device reads the value of the register in the slave device based on the review register address corresponding to model A to obtain the second value corresponding to model A.

S803: When the second value corresponding to model A is the same as the second preset value corresponding to model A, the master device identifies the slave device as model A.

Adaptively, the master configures the slave based on the A model.

S804: When the first value corresponding to model A is different from the first preset value corresponding to model A, or the second value corresponding to model A is different from the second preset value corresponding to model A, the master device confirms whether the polling is completed.

When model A is not the last model, the polling is not completed, and the master device reads the value of the register in the slave device based on the identification register address corresponding to model B to obtain the first value corresponding to model B.

When model A is the last model, the master device fails to recognize the slave device.

In summary, when identifying a slave device based on the first slave device model, the values of two different registers in the slave device are read for verification, thereby reducing the probability that the values corresponding to the same address registers in slave devices of different models are the same, and reducing the possibility of device misidentification.

Based on the above embodiment, the method further includes S805. S805: Before the master device reads the value of the register in the slave device based on the review register address, the master device controls the slave device to reset.

It should be noted that during the use of the electronic device, the values corresponding to some registers in the slave device may change. For example, taking the slave device as a temperature sensor, the register for storing the detected temperature may be rewritten multiple times to store the temperature obtained by the most recent detection. Taking the default value as 20 and the detected temperature as 30 as an example, the value corresponding to the register for storing the detected temperature may be rewritten from 20 to 30.

In this way, resetting the slave device will restore the value of the register in the slave device to the default value, which can reduce the recognition failure or misrecognition caused by the value corresponding to the review register being rewritten.

Based on the above embodiment, the method further includes S806. S806: When the master device fails to identify the slave device, configure the slave device based on the preset model. In this way, the master device may successfully configure the slave device based on the preset model, so that the slave device can operate normally, thereby realizing the function of the electronic device.

In a possible implementation, the preset model may be the model corresponding to the slave device that is used most times in the electronic device, thereby increasing the possibility that the master device can successfully configure the slave device.

On the basis of the above embodiment, the master device may verify the model of the slave device based on the identification register address and/or the review register address for multiple times, thereby further reducing the possibility of misidentification.

It can be understood that the SPI interface is compatible with model A and model B slave devices in the process shown in Figure 9 above for example only. In actual applications, the SPI interface can also be compatible with more models of slave devices. The embodiments of the present application do not limit the models and types of slave devices compatible with the SPI interface.

In the above embodiment, the SPI interface compatible slave devices may be slave devices of the same type but of different models, or may be slave devices of different types, which is not limited in the embodiment of the present application.

It should be noted that when the electronic device is turned on or restarted, the master device switches from the power-off state to the power-on state, and the master device needs to identify and configure the slave device. When the slave device switches from the power-off state to the power-on state, the master device also needs to identify and configure the slave device.

The method provided in the embodiment of the present application can also be applied to the case where the slave device switches from a power-off state to a power-on state, and can also be applied to the process of powering on the slave device after powering off. For example, a problem occurs in the software system of the electronic device, causing the slave device to power on after powering off, or a latch-up occurs in the slave device, causing the slave device to power on after powering off.

The device identification method of the embodiment of the present application has been described above, and the related device for performing the above device identification method provided by the embodiment of the present application is described below. Those skilled in the art can understand that the method and the device can be combined and referenced with each other, and the related device provided by the embodiment of the present application can perform the steps in the above device identification method.

The embodiments of the present application also provide a computer-readable storage medium. The methods described in the above embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, the functions can be stored as one or more instructions or codes on a computer-readable medium or transmitted on a computer-readable medium. Computer-readable media can include computer storage media and communication media, and can also include any medium that can transfer a computer program from one place to another. The storage medium can be any target medium that can be accessed by a computer.

In one possible implementation, a computer readable medium may include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that is intended to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. Moreover, any connection is appropriately referred to as a computer readable medium. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology (such as infrared, radio and microwave), the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of medium. Disks and optical disks as used herein include optical disks, laser disks, optical disks, digital versatile disks (DVD), floppy disks and Blu-ray disks, where disks usually reproduce data magnetically, while optical disks reproduce data optically using lasers. Combinations of the above should also be included in the scope of computer readable media.

The present application embodiment is described with reference to the flowchart and/or block diagram of the method, device (system) and computer program product according to the embodiment of the present application. It should be understood that each process and/or box in the flowchart and/or block diagram, and the combination of the process and/or box in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processing unit of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device produce a device for realizing the function specified in one process or multiple processes in the flowchart and/or one box or multiple boxes in the block diagram.

The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A device identification method, characterized in that it is applied to an electronic device, the electronic device comprises a master device and a slave device, the master device is connected to the slave device via a serial peripheral interface SPI bus, the master device stores a correspondence between at least two groups of addresses, at least two first preset values, at least two second preset values and at least two slave device models, the at least two first preset values, the at least two second preset values, the at least two slave device models, and the at least two groups of addresses correspond to each other one by one, any group of the addresses comprises a first address and a second address, the method comprises: The master device reads a value of a register in the slave device according to a first address in a first group of addresses in the at least two groups of addresses to obtain a first value corresponding to the first address in the first group of addresses; The master device reads the value of the register in the slave device according to the second address in the first group of addresses, the second value corresponding to the second address in the first group of addresses; When the first value is the same as a first preset value corresponding to the first group of addresses, and the second value is the same as a second preset value corresponding to the first group of addresses, the master device configures the slave device based on a first slave device model corresponding to the first group of addresses; Alternatively, when the first value is different from a first preset value corresponding to the first group of addresses, or the master device determines that the second value is different from a second preset value corresponding to the first group of addresses, the master device reads a value of a register in the slave device based on a second group of addresses among the at least two groups of addresses, and the second group of addresses is not the first group of addresses; Wherein, before the master device configures the slave device, the third value is a fixed value, and the third value is a value of a register corresponding to the second address in the slave device. 2. The method according to claim 1, wherein the master device reads the value of the register in the slave device according to the second address in the first group of addresses, the second value corresponding to the second address in the first group of addresses comprising: When the first value is the same as a first preset value corresponding to the first group of addresses, the master device reads a value of a register in the slave device based on a second address in the first group of addresses to obtain the second value. 3. The method according to claim 1, characterized in that the method further comprises: When the value of the register in the slave device read by the master device according to the first address in the at least two groups of addresses is different from the first preset value corresponding to each group of the addresses, the master device configures the slave device based on a preset model, and the preset model is any slave device model in the corresponding relationship; Alternatively, when the value of the register in the slave device read by the master device according to the second address in the at least two groups of addresses is different from the second preset value corresponding to each group of the addresses, the master device configures the slave device based on the preset model. 4. The method according to claim 1, wherein the master device configures the slave device based on the first slave device model corresponding to the first group address, comprising: The master device writes the adjustment parameter corresponding to the first slave device model into the register of the slave device. 5. The method according to any one of claims 1 to 4, characterized in that before the master device reads the value of the register in the slave device based on the second address in the first group of addresses, the method further comprises: The master device controls the slave device to reset. 6. The method according to any one of claims 1-4, characterized in that the fixed value is not zero. 7. The method according to any one of claims 1 to 4, characterized in that the register corresponding to the second address in the slave device comprises: a control register whose reading value is fixed and has not been subjected to read or write operations. 8. The method according to any one of claims 1 to 4, characterized in that before the master device reads the value of the register in the slave device based on the first group of addresses, the method comprises: The master device switches from a second state to a first state, the second state is a power-off state, and the first state is a power-on state; Alternatively, the master device detects that the slave device switches from the second state to the first state. 9. The method according to any one of claims 1 to 4, characterized in that the corresponding relationship is stored in the main device in the form of a table. 10. The method according to any one of claims 1 to 4, characterized in that the main device comprises at least one of the following: a processor CPU, a system-on-chip SOC, a microcontroller MCU, a microprocessor MPU, and a programmable system on chip SOPC; The slave device includes at least one of the following: a sensor, a battery, a communication module, an audio module, a button, a motor, an indicator, a display screen, and a user identification module. 11. An electronic device, comprising: a processor and a memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 10. 12. A computer-readable storage medium, characterized in that a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed, the method according to any one of claims 1 to 10 is implemented. 13. A computer program product, comprising a computer program or an instruction, wherein when the computer program or the instruction is executed by a processor, the method according to any one of claims 1 to 10 is implemented.