WO2023197709A1 - Device identification method and related apparatus - Google Patents

Abstract

Provided in the embodiments of the present application are a device identification method and a related apparatus, which are applied to an electronic device. The electronic device comprises a master device, which stores a correspondence, and a slave device, which is connected to the master device by means of an SPI bus, wherein the correspondence comprises the relationship among a slave device model number, a first address, a first preset value, a second address and a second preset value. The method comprises: on the basis of the model number of a slave device model number and a correspondence, a master device reading values of registers in a slave device, so as to obtain a first value and a second value, which correspond to the model number of a first slave device; and if the first value and the second value are respectively the same as a first preset value and a second preset value, which correspond to the model number of the first slave device, the master device configuring the slave device on the basis of the model number of the first slave device. Before the master device configures the slave device, the value of a register corresponding to a second address which corresponds to the model number of the first slave device in the slave device is a constant value. Two instances of verification and identification are performed on the basis of two addresses, such that misidentification of the model number of a device that is caused by the same value of registers of the same address is reduced, thus reducing configuration failures.

Description

Device identification method and related device

This application claims priority to the Chinese patent application submitted to the State Intellectual Property Office of China on April 12, 2022, with application number 202210380036.1 and application title "Device Identification Method and Related Devices", the entire content of which is incorporated into this application by reference. middle.

Technical field

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

Background technique

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

Currently, in electronic equipment, the processor (CPU) can be compatible with multiple types of peripheral devices through a set of SPI interfaces to improve the reuse 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 recognition process, misrecognition may occur, resulting in incorrect initial configuration of the slave device, making peripheral devices unusable, and worsening the user experience.

Contents of the invention

Embodiments of the present application provide a device identification method and related devices. 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 both values are as expected, the device identification is successful. In this way, secondary identification is performed to reduce the misidentification of device models due to registers with the same address in different models of slave devices having the same value, resulting in failure to initialize and configure the slave device, and to optimize 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 system design flexibility, and improves the stability of product material supply.

In a first aspect, embodiments of the present application provide a device identification method. This method is applied to electronic equipment. The electronic equipment includes a master device and a slave device. The master device is connected to the slave device through the serial peripheral interface SPI bus. The master device stores a corresponding relationship. The corresponding relationship includes the slave device model, the first address, the first address, and the slave device model. The relationship between a preset value, a second address and a second preset value. In the corresponding relationship, any slave device model corresponds to a first address, a first preset value, a second address and a second preset value. Set 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, and obtains 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 Determine 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 second preset value corresponding to the first slave device model. At the same time, 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 slave device corresponding to the first slave device model. The second type of address corresponds to the value of the register.

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 verification and identification based on two register addresses can reduce device model misidentification caused by the same value corresponding to the register of the same address in different models of slave devices, reduce the failure of slave device configuration, and optimize 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 system design flexibility, 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, and obtains the first value corresponding to the first slave device model and the second value corresponding to the first slave device model, including: master The device reads the value of the register in the slave device based on the first address corresponding to the first slave device model and obtains the first value; the master device reads the value of the register in the slave device based on the second type address corresponding to the first slave device model and obtains Second value.

Optionally, the master device reads the value of the register in the slave device based on the second type address corresponding to the first slave device model, and obtains the second value, including: when the master device determines that the first value corresponds to the first slave device model. When the preset values are the same, 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 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, thereby 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. When , 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 number of the slave device can also be verified based on the second slave device model number.

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 the preset model, and the preset model is the one in the corresponding relationship. Any slave device 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, increasing the possibility that the master device successfully configures the slave device.

Optionally, the master device configures the slave device based on the first slave device model, including: the master device writes the adjustment parameters 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 recognition failure or misrecognition caused by the value corresponding to the review register being overwritten.

Optional, fixed value not zero.

It is understandable that most registers report a value of 0 after power-on reset, and the value of a register is usually 0 when an exception occurs. 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 address include: control registers with fixed reading values that have not been read or written.

In this way, the identification failure caused by the value in the register being changed can be reduced and the success rate of identification 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, it includes: 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, master devices include but are not limited to: processor CPU or system-on-chip SOC, microcontroller MCU, microprocessor MPU or programmable system-on-chip SOPC; slave devices include but are not limited to: sensors, batteries, antennas, mobile devices Communication module, wireless communication module, audio module, speaker, receiver, microphone, headset, button, motor, indicator, camera, display screen, and user identification module.

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

Optionally, the preset model may be the model corresponding to the most frequently used slave device in the electronic device. This increases the likelihood that the master will successfully configure the slave.

Optionally, the master device verifies the model number of the slave device based on the first type address and/or the second type address multiple times. In this way, misrecognition situations can be further reduced.

In a second aspect, embodiments of the present application provide an electronic device. The electronic device includes a terminal device. The terminal device may be: a mobile phone, a tablet computer, a laptop computer, a personal digital assistant (PDA), or a mobile Internet device (mobile Internet access device). internet device (MID), wearable devices, consumer electronics, laptops, desktop computers, automobiles, industrial control robots or industrial electronic equipment, etc.

The electronic device includes: a processor and a memory; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory, so that the processor executes the method of the first aspect.

The beneficial effects of the electronic equipment provided in the above-mentioned second aspect and the possible designs of the above-mentioned second aspect can be referred to the beneficial effects brought by the above-mentioned first aspect and the possible structures of the first aspect, and will not be discussed here. Repeat.

In a third aspect, embodiments of the present application provide a computer-readable storage medium. Computer programs or instructions are stored in the computer-readable storage medium. When the computer programs or instructions are run, the method of the first aspect is implemented.

The beneficial effects of the computer-readable storage medium provided in the above-mentioned third aspect and the possible designs of the above-mentioned third aspect can be seen in the beneficial effects brought by the above-mentioned first aspect and the possible structures of the first aspect. This will not be described again.

In a fourth aspect, embodiments of the present application provide a computer program product, which includes a computer program or instructions. When the computer program or instructions are executed by a processor, the method of the first aspect is implemented.

The beneficial effects of the computer program product provided in the above-mentioned fourth aspect and possible designs of the above-mentioned fourth aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and various possible structures of the first aspect, which are not discussed here. Again.

Description of the drawings

Figure 1 is a schematic diagram of the connection between a master device and a slave device provided by an embodiment of the present application;

Figure 2 is a schematic diagram of an application scenario provided by the embodiment of the present application;

Figure 3 is a schematic structural diagram of a slave device provided by an embodiment of the present application;

Figure 4 is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present application;

Figure 5 is a flow diagram of a device identification method in a possible design;

Figure 6 is a flow diagram of a device identification method in a possible design;

Figure 7 is a schematic flowchart of misidentification of a device in a possible design;

Figure 8 is a schematic flow chart of a device identification method provided by an embodiment of the present application;

Figure 9 is a schematic flowchart of a device identification method provided by an embodiment of the present application.

Detailed ways

In order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as “first” and “second” are used to distinguish the same 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 sequence is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not limit the number and execution order.

It should be noted that in this application, words such as “exemplary” or “for example” are used to represent examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "such as" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary" or "such as" is intended to present the concept in a concrete manner.

It should be noted that the network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly explaining the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art It can be seen that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

It can be understood that the term "plurality" in this article refers to two or more than two. The term "and/or" in this article is just an association relationship that describes related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and they exist alone. B these three situations. In addition, the character "/" in this article generally indicates that the related objects before and after are an "or" relationship; in the formula, the character "/" indicates that the related objects before and after are a "division" relationship.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for 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 sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be used in the implementation of the present application. The implementation of the examples does not constitute any limitations.

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

1. SPI bus: A high-speed, full-duplex synchronous serial communication interface. The SPI bus allows 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 asynchronous data receiving and receiving interface (universal asynchronous receiver/transmitter, UART) or inter-integrated circuit (inter-integrated circuit, I2C) bus, which can reach 10 megabits per second (megabits per second) , Mbps) or so.

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

It should be noted that during the communication process between the master device and the slave device through the SPI bus, there is no response mechanism between the master device and the slave device. Specifically, after receiving a request from the master device, the slave device in the enabled state transmits information to the master device; the slave device will not feedback a message to the master device indicating receipt of the request.

In possible design one, the SPI bus includes 4 types of transmission lines, namely serial clock line (SCLK), master input/slave output data line (master in/slave out, MISO), master output/slave input Data line (master out/slave in, MOSI), low-level active slave select line (chip select, CS).

MISO is the master device data input and slave device data output; MISO can also be called SOMI or SDO, etc. MOSI is the master device data output and slave device data input; 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, 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 possible design 2, the SPI bus includes three types of transmission lines, namely serial clock line (SCLK), host output/master input data line (master output/master input, MOMI), and low-level active slave selection. Line (chip select, CS).

MOMI can also be called SISO. SCLK is the clock signal, generated by the master device; CS is the enable signal of the slave device, controlled by the master device; CS can also be called SS or SSEL, etc. The embodiments of the present application do not limit this.

It can be understood that among the above two possible designs, the SPI bus can omit the CS transmission line and connect the pins used to connect the CS transmission line to ground.

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

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

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

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

It is understandable that due to differences in device principles, internal structures, software implementation, etc. in different types of devices, when the SPI interface can be compatible with multiple slave device connections, the master device needs to configure the SPI interface before configuring the slave device. The type, model, etc. of the connected slave device are identified, and initial configuration is performed based on the type, model, etc. of the slave device.

2. Polling: It is a way for the master device to decide how to provide slave device services. Specifically, the master device issues an inquiry and identifies 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, initialization configuration is performed based on the first slave device model; if it is not based on the first slave device model, The device model identifies the slave device, the slave device is identified based on the second slave device model, and then the cycle continues until the slave device is identified or the slave device is identified based on the last model number. Polling can also be called "programmed I/O".

In the embodiment of the present application, the master device sends inquiries to the slave devices in the order of the 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 recognizes the slave device. , configure 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 a power outage. For example, when the electronic device is turned on, both the master device and the slave device may be in an initial state and start working from the initial state.

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

Illustratively, FIG. 2 is a schematic diagram of an application scenario provided by the embodiment of the present application. As shown in FIG. 2 , the electronic device includes a master device 101 and a slave device 102 . Master device 101 and slave device 102 are connected through an SPI bus.

The master device 101 is used to obtain data from the slave device 102 through the SPI bus and/or control the slave device 102, etc., 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, 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 temperature sensor detection frequency through the SPI bus.

In this embodiment of the present application, the master device 101 is compatible with multiple models of slave devices connected through the SPI bus. Different types of slave devices will have differences in their corresponding device principles, internal structures, software implementation, etc. 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 the configuration of 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 realize the identification of the model of the slave device 102, data acquisition and control, etc.

To facilitate understanding, the structure of the slave device 102 will be described below with reference to FIG. 3 .

Slave device 102 includes multiple registers. Registers include but are not limited to control registers, status registers, function registers and identification registers.

Control class 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 execution results of instructions, such as whether there is a carry (CF bit), whether there is an overflow (OV bit), and whether the result is positive or negative ( SF bit), whether the result is zero (ZF bit), parity flag bit (P bit), etc.; another type of information is control information, such as enable interrupt (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 device identification to facilitate the master device to distinguish the type of slave device.

It can be understood that each register in the slave device corresponds to an address, and registers corresponding to different addresses have different functions. For example, as shown in Figure 3, 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, used to store status information about whether the temperature is abnormal; register 02 can be a control register, used to store the detection frequency; register 03 can be an identification register, used To store device identification. The slave device shown in Figure 3 can also include a functional register for storing the detected temperature.

In addition, the number of registers corresponding to different models of slave devices may be different. Registers corresponding to the same address may be different. For example, register 01 in Figure 3 can be an identification register, used to store device identification. Register 02 can be a status register, used to store status information about whether the temperature is abnormal; register 03 can be a control register, used to store the frequency of detection. The embodiments of this application do 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 may be a processor (central processing unit, CPU), system on chip (SOC), microcontroller (micro control unit, MCU), or microprocessor in an electronic device (MPU) and system-on-a-programmable-chip (SOPC), etc.

The slave device 102 may be a peripheral device in the electronic device. For specific peripheral devices, please refer to the hardware architecture description of the electronic device in Figure 4 below, and will not be described again here.

Exemplarily, FIG. 4 is a schematic diagram of the hardware structure of an electronic device provided by 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, and a battery 142 , Antenna 1, Antenna 2, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone interface 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193 , display screen 194, and subscriber identification module (subscriberidentification module, SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyro 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, and ambient light. Sensor 180L, bone conduction sensor 180M, etc.

It can 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 figures, or some components may be combined, some components may be separated, or some components may be arranged differently. The components illustrated 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 (application processor, AP), a modem processor, a graphics processing unit (GPU), an image signal processor ( image signal processor (ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU), etc. Among them, different processing units can be independent devices or integrated in 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 processor 110 is cache memory. This memory may hold instructions or data that have been recently used or recycled by processor 110 . If the processor 110 needs to use the instructions or data again, it can be recalled from memory. Repeated access is avoided and the waiting time of the processor 110 is reduced, thus improving the efficiency of the system.

In some embodiments, processor 110 may include one or more interfaces. Interfaces may include integrated circuit (inter-integrated circuit, I2C or IIC) interface, serial peripheral interface (SPI), integrated circuit built-in audio (inter-integrated circuitsound, I2S) interface, pulse code modulation (pulse code) modulation (PCM) interface, universal asynchronous receiver/transmitter (UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, Subscriber identity module (SIM) interface, and/or 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 (derail clock line, SCL). In some embodiments, processor 110 may include multiple sets of I2C buses. The processor 110 can separately couple the touch sensor 180K, charger, flash, camera 193, etc. through different I2C bus interfaces. For example, the processor 110 can be coupled to the touch sensor 180K through an I2C interface, so that the processor 110 and the touch sensor 180K communicate through the I2C bus interface to implement the touch function of the electronic device 100 .

The SPI interface is a high-speed synchronous serial communication bus. For the specific structure, please refer to the description of the above related concepts. In some embodiments, processor 110 may include multiple sets of SPI buses. The processor 110 can couple peripheral devices such as the temperature sensor 180J, charger, flash, 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 and the temperature sensor 180J communicate through the SPI bus interface, so that the electronic device 100 can execute a temperature processing strategy based on the temperature detected by the temperature sensor 180J to implement the temperature adjustment function.

The I2S interface can be used for audio communication. In some embodiments, processor 110 may include multiple sets of I2S buses. The processor 110 can be coupled with the audio module 170 through the I2S bus to implement communication between the processor 110 and the audio module 170 . In some embodiments, the audio module 170 can transmit audio signals to the wireless communication module 160 through the I2S interface to implement the function of answering calls through a Bluetooth headset.

The PCM interface can also be used for audio communications to sample, quantize and encode analog signals. In some embodiments, the audio module 170 and the wireless communication module 160 may be coupled through a PCM bus interface. In some embodiments, the audio module 170 can also transmit audio signals to the wireless communication module 160 through the PCM interface to implement the function of answering calls through 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 used 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, a 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 audio signals 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 . MIPI interfaces include camera serial interface (CSI), display serial interface (displayserial interface, DSI), etc. In some embodiments, the processor 110 and the camera 193 communicate through the CSI interface to implement the shooting function of the electronic device 100 . The processor 110 and the display screen 194 communicate through the DSI interface to implement the display function of the electronic device 100 .

The GPIO interface can be configured through 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, display screen 194, wireless communication module 160, audio module 170, sensor module 180, etc. The GPIO interface can also be configured as an I2C interface, I2S interface, UART interface, MIPI interface, etc.

The USB interface 130 is an interface that complies with the USB standard specification, and may 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 transmit data between the electronic device 100 and peripheral devices. It can also be used to connect headphones to play audio through them. This interface can also be used to connect other electronic devices, such as AR devices, etc.

It can be understood that the interface connection relationships between the modules illustrated in the embodiments of the present application are schematic illustrations and do 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 the charger. Among them, 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, the wireless communication module 160, and the like. The power management module 141 can also be used to monitor battery capacity, battery cycle times, battery health status (leakage, impedance) and other parameters. In some other embodiments, the power management module 141 may also be provided in the processor 110 . In other embodiments, the power management module 141 and the charging management module 140 may also be provided 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. Antennas in electronic device 100 may be used to cover single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.

The mobile communication module 150 can provide solutions for wireless communication including 2G/3G/4G/5G applied on the electronic device 100 . The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves through the antenna 1, perform filtering, amplification and other processing on the received electromagnetic waves, and transmit them to the modem processor for demodulation.

The wireless communication module 160 can provide applications on the electronic device 100 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), Bluetooth (bluetooth, BT), and global navigation satellite systems. (global navigation satellite system, GNSS), frequency modulation (FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions.

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

The display screen 194 is used to display images, display videos, receive sliding operations, and the like. Display 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 implement the shooting function through an ISP, a camera 193, a video codec, a GPU, a display screen 194, an application processor, and the like.

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

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

Digital signal processors are used to process digital signals. In addition to digital image signals, they can also process other digital signals. For example, when the electronic device 100 selects a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy.

Video codecs are used to compress or decompress digital video. Electronic device 100 may support one or more video codecs. In this way, the electronic device 100 can play or record videos in multiple encoding 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 the data storage function. Such as saving music, videos, etc. files in external memory card.

Internal memory 121 may be used to store computer executable program code, which includes instructions. The internal memory 121 may include a program storage area and a data storage area. Among them, the stored program area can store an operating system, at least one application program required for a function (such as a sound playback function, an image playback function, etc.). The storage data area may store data created during use of the electronic device 100 (such as audio data, phone book, etc.). In addition, the internal memory 121 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc. The processor 110 executes various functional applications and data processing of the electronic device 100 by executing 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 through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone interface 170D, and the application processor. Such as music playback, recording, etc.

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. Audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be provided in the processor 110 , or some functional modules of the audio module 170 may be provided in the processor 110 .

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

Receiver 170B, also called "earpiece", is used to convert audio electrical signals into sound signals. When the electronic device 100 answers a call or a voice message, the voice can be heard by bringing 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 close to the microphone 170C with the human mouth and input the sound signal to the microphone 170C. The electronic device 100 may be provided with at least one microphone 170C. In other embodiments, the electronic device 100 may be provided with two microphones 170C, which in addition to collecting sound signals, may also implement a 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 sound sources, and implement directional recording functions, etc.

The headphone interface 170D is used to connect wired headphones. The headphone interface 170D may be a USB interface 130, or may be a 3.5mm 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 pressure signals and can convert the pressure signals into electrical signals. In some embodiments, pressure sensor 180A may be disposed on 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 may comprise at least two parallel plates of conductive material. When a force is applied to 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 is performed on the display screen 194, the electronic device 100 detects the strength of the touch operation according to the pressure sensor 180A. The electronic device 100 may also calculate the touched position based on the detection signal of the pressure sensor 180A. In some embodiments, touch operations acting on the same touch location but with different touch operation intensities may correspond to different operation instructions.

The gyro sensor 180B may be used to determine the motion posture of the electronic device 100 . In some embodiments, the angular velocity of electronic device 100 about three axes (ie, x, y, and z axes) may be determined by gyro sensor 180B. The gyro sensor 180B can be used for image stabilization. For example, when the shutter is pressed, the gyro sensor 180B detects the angle at which the electronic device 100 shakes, calculates the distance that the lens module needs to compensate based on the angle, and allows the lens to offset the shake 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.

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 positioning and navigation.

Magnetic sensor 180D includes a Hall sensor. The electronic device 100 may utilize the magnetic sensor 180D to detect opening and closing of the flip holster. In some embodiments, when the electronic device 100 is a flip machine, the electronic device 100 may detect the opening and closing of the flip according to the magnetic sensor 180D. Then, based on the detected opening and closing status of the leather case or the opening and closing status of the flip cover, features such as automatic unlocking of the flip cover are set.

The acceleration sensor 180E can detect the acceleration of the electronic device 100 in various 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 terminal devices and be used in applications such as horizontal and vertical screen switching, pedometers, etc.

Distance sensor 180F for measuring distance. Electronic device 100 can measure distance via infrared or laser. In some embodiments, when shooting a scene, the electronic device 100 may utilize the distance sensor 180F to measure distance to achieve fast focusing.

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 outwardly through the light emitting diode. Electronic device 100 uses photodiodes 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 may determine that there is no object near the electronic device 100 . The electronic device 100 can use the proximity light sensor 180G to detect when the user holds the electronic device 100 close to the ear for talking, so as to automatically turn off the screen to save power. The proximity light sensor 180G can also be used in holster mode, and pocket mode automatically unlocks and locks the screen.

The ambient light sensor 180L is used to sense ambient light brightness. 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 the pocket to prevent accidental touching.

Fingerprint sensor 180H is used to collect fingerprints. The electronic device 100 can use the collected fingerprint characteristics to achieve fingerprint unlocking, access to application locks, fingerprint photography, fingerprint answering of incoming calls, etc.

Temperature sensor 180J is used to detect temperature. In some embodiments, the electronic device 100 utilizes the temperature detected by the temperature sensor 180J to execute the 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 prevent the low temperature from causing the electronic device 100 to shut down abnormally. In some other embodiments, when the temperature is lower than another threshold, the electronic device 100 performs boosting on the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.

Touch sensor 180K, also known as "touch device". The touch sensor 180K can be disposed on the display screen 194. The touch sensor 180K and the display screen 194 form a touch screen, which is also called a "touch screen". The touch sensor 180K is used to detect a touch operation on or near the touch sensor 180K. The touch sensor can pass the detected touch operation to the application processor to determine the touch event type. Visual output related to the touch operation may be provided through display screen 194 . In other embodiments, the touch sensor 180K may also be disposed on the surface of the electronic device 100 at a location different from that of the display screen 194 .

Bone conduction sensor 180M can acquire vibration signals. In some embodiments, the bone conduction sensor 180M can acquire the vibration signal of the vibrating bone mass of the human body's vocal part. The bone conduction sensor 180M can also contact the human body's pulse and receive blood pressure beating signals. In some embodiments, the bone conduction sensor 180M can also be provided in an earphone and combined into a bone conduction earphone. The audio module 170 can analyze the voice signal based on the vibration signal of the vocal vibrating bone obtained by the bone conduction sensor 180M to implement the voice function. The application processor can analyze the heart rate information based on the blood pressure beat signal obtained by the bone conduction sensor 180M to implement the heart rate detection function.

The buttons 190 include a power button, a volume button, etc. Key 190 may be a mechanical key. It can also be a touch button. The electronic device 100 may receive key inputs and generate key signal inputs related to user settings and function control of the electronic device 100 .

The motor 191 can generate vibration prompts. The motor 191 can be used for vibration prompts for incoming calls 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. The motor 191 can also respond to different vibration feedback effects for touch operations in different areas of the display screen 194 . Different application scenarios (such as time reminders, receiving information, alarm clocks, games, etc.) can also correspond to different vibration feedback effects. The touch vibration feedback effect can also be customized.

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

The SIM card interface 195 is used to connect a SIM card. The SIM card can be connected to or 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. SIM card interface 195 can support Nano SIM card, Micro SIM card, SIM card, etc. Multiple cards can be inserted into the same SIM card interface 195 at the same time. Multiple cards can be of the same type or different types. The SIM card interface 195 is also compatible with different types of SIM cards. The SIM card interface 195 is also 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, that is, 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 Figure 4 above, the master device can be a processor, and the slave devices can be peripheral devices, such as the charging management module 140, the power management module 141, the battery 142, the antenna 1, the antenna 2, and the mobile communication module 150. Wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone interface 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, display screen 194, and subscriber identification module , SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyro 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, and ambient light. Sensor 180L, bone conduction sensor 180M, etc.

The device identification method provided by the embodiment of the present application can be applied to electronic equipment with an SPI interface. Electronic equipment includes terminal equipment. Terminal equipment can also be called terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. Terminal devices can be mobile phones, smart TVs, wearable devices, tablets (Pads), computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminals Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, transportation Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes, etc. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined wearable smart devices include full-featured, large-sized devices that can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of this application, the terminal device may also be a terminal device in the Internet of things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to transfer items through communication technology. Connect with the network to realize an intelligent network of human-computer interconnection and physical-object interconnection.

The embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.

When the electronic device receives an operation to instruct the power on, the processor in the electronic device needs to identify the model of the peripheral device connected through the SPI bus, so as to perform corresponding initialization configuration of the peripheral device based on the device model, etc., so as to realize the corresponding response of the electronic device. function.

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

For example, FIG. 5 is a schematic flowchart of a possible device identification method in the design. As shown in Figure 5, methods include:

S401. When the electronic device receives an operation for instructing to turn on, the master device reads the value of the register in the slave device based on model order and correspondence.

It is understood that the master device may be compatible with multiple slave device connections through the SPI bus. The master device reads the value of the corresponding register in the slave device according to the preset model order and correspondence to confirm the slave device model.

In the embodiment of this 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 can be stored in the main device in the form of a table. For example, the correspondence between the slave device model, identification register address and preset value is as 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 the 0×00 register, and the default 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 the 0×00 register of the slave device and the preset value. When the master device is based on the value corresponding to the 0×00 register of the slave device and is 11, it identifies the slave device as model A; when the master device is based on the value corresponding to the 0×00 register of the slave device and is not 11, it identifies that the slave device is not model A.

The identification register corresponding to model B is 0×01 register, that is, the identification register corresponding to model B is 0×01 register, and the default value is 12. It can be understood that the master device can identify whether the slave device is model B based on the value corresponding to the 0×01 register of the slave device and the preset value. When the master device corresponds to a value of 12 based on the 0×01 register of the slave device, it identifies the slave device as model B; when the master device identifies that the slave device is 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.

Adaptable, after the master device recognizes the slave device, it initializes the configuration of the slave device.

For example, taking the slave device as a temperature sensor, the master device configures a new value in a register in the temperature sensor. For example, the value is used to indicate the frequency at which the temperature sensor collects 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 polling is completed.

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

For example, taking the slave devices compatible with the SPI interface as model A and model B, as shown in Figure 6, the identification process is as follows:

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

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

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.

Adaptable, 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 model B, the master device identifies the slave device as model B.

Adaptable, 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 recognizes that the slave device is the first slave device. 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 polling to the last model of slave device, the master device did not recognize the slave device and the slave device recognition failed.

However, in the above-mentioned processes shown in Figures 5 and 6, the master device may make errors when identifying the slave device, resulting in the slave device being unusable, the corresponding functions of the electronic device being unusable, and the user experience being poor.

For example, if the master device compatiblely connects the model A slave device and the model B slave device through the SPI interface, the master device may recognize the model B slave device as the 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 A model, the value corresponding to the corresponding register in the B model slave device is the same as the preset value corresponding to the A model.

To facilitate understanding, the register list corresponding to the 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 phase; 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 can be understood that the value corresponding to the reserved register may be a fixed value, a random value, or multiple fixed values.

The misidentification process will be described below in conjunction with Table 2 and Figure 7. For example, assuming that the model of the slave device is model B, and the master device identifies the slave device in order of model A and model B, the identification process includes:

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

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

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.

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

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 The slave device is misidentified as model A.

When the master device performs initial configuration based on model A, it may cause the slave device to initialize configuration errors, and then the slave device cannot operate normally and the corresponding functions fail.

In view of this, embodiments of the present application provide a device identification method. The master device can read the values of two different registers in the slave device and obtain the corresponding two values for verification. When the two values are in line with expectations, the device Recognition successful. In this way, secondary recognition is performed to reduce the situation where the device misrecognizes the initialization configuration and fails due to the same value corresponding to the same address register in different models of slave devices, and optimizes the user experience. In addition, the hardware structure of the electronic equipment is not changed, which is cost-friendly, improves system design flexibility, and improves the stability of product material supply.

The device identification method provided by the embodiment of the present application will be described below with reference to the accompanying drawings.

Exemplarily, Figure 8 is a schematic flowchart of a slave device identification method provided by an embodiment of the present application. As shown in Figure 8, 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 slave device model order and correspondence relationship, and obtains the first value and/or the second value; the correspondence relationship includes the slave device model, first address, The relationship between the first preset value, the second address and the second preset value.

It can be understood that when the electronic device is turned on, the master device switches from the power-off state to the power-on state and begins to identify the slave device.

In the embodiment of the present application, the first address may be the address corresponding to the identification register corresponding to the slave device of different models, and the second address may be the address corresponding to the review register corresponding to the slave devices of different models. The identification register is a register that stores device identification and is used to distinguish device models. Review Register A register used to verify the device model.

For example, taking the slave device models as model A and model B, 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 first preset value is 0×01. The default 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 a register number.

In a possible implementation, the above correspondence relationship can be stored in the main device in the form of a table. Illustrative, as shown in Table 3.

Table 3 Correspondence table

It can be understood that the master device reads the value of the register in the slave device based on the first address and the second address, and obtains 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; it may also first read the value of the register in the slave device based on the second address to obtain the second value. There are no limitations here.

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

It can be understood that the master device is compatible with multiple slave device connections through the SPI bus. The master device reads the value of the corresponding register in the slave device according to the preset model order and correspondence to confirm the slave device model.

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 recognizes the slave device and initializes the slave device based on the model. The second value master device configures The slave device was previously a fixed value.

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 polling is completed.

For example, the master device confirms whether polling is completed based on model order. When the master device does not read the value of the register in the slave device based on the last model and corresponding relationship, the polling is not completed, and the master device executes S701 until the slave device is recognized 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 corresponding relationship, 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, it configures the slave device based on the 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 based on model order and correspondence to obtain the second value.

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

The device identification method during the power-on initialization process of the electronic device will be described below with reference to Figure 9. For example, as shown in Figure 9,

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

It can be understood that the master device is connected to multiple slave devices through the SPI bus. The master device confirms the model of the slave device through 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 can be stored in the main 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 can 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 the first value of 11, and the master device reads the value of the 0×01 register of the slave device and obtains the 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 the first value obtained is 12, and the master device reads the value of the 0×02 register of the slave device and obtains the second value 14, the slave device is model B. .

In the embodiment of this application, the double check register is different from the identification register. 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 the slave devices of different models may be the same or different, which is not limited in the embodiment of the present application.

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

In this way, the address of the review register is the same, and the master device can distinguish different models 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 understood that unstable registers can be reserved registers, registers whose values have been modified, etc.

Some registers may be read or written during device operation, causing the corresponding value of the register to be modified. The register may be a register for data output, a register for indicating mode switching, a register for indicating abnormal conditions, etc.

For example, taking a temperature sensor as an example, the unstable register may be: a register used to store the detected temperature, an undisclosed retention register, etc.

Stable registers can be: registers whose values have not been modified, such as control registers that have a fixed value and have not been read or written during the use of the slave device.

For example, taking the temperature sensor as an example, the stable register can be: interrupt control register. The reported value of this register is fixed and non-zero after power-on reset. This interrupt control register is used to control the enablement of the interrupt function. The processor is not operating. Through the interrupt control register, it can be predicted that the register value of this register will be 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. In this way, the identification failure caused by the value in the register being changed can be reduced and the success rate of identification can be improved.

In a possible implementation, the review register is a non-zero register. It is understandable that most registers report a value of 0 after power-on reset, and the value of a register is usually 0 when an exception occurs. 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. In this way, the identification failure caused by the value in the register being changed can be reduced and the success rate of identification can be improved.

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, and obtains 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.

Adaptable, the master device configures the slave device 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 polling is completed.

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

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

In summary, when identifying the slave device based on the first slave device model, read the values of two different registers in the slave device for verification. In this way, the probability that the same address register in different models of slave devices corresponds to the same value is reduced, and the misidentification of the device is reduced.

Based on the above embodiment, the method also 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 electronic equipment, the values corresponding to some registers in the slave device may change. For example, if the slave device is a temperature sensor, the register used to store the detected temperature may be rewritten multiple times to store the latest detected temperature. Taking the default value as 20 and the detected temperature as less than 30 as an example, the corresponding value of the register used to store 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 recognition failure or misrecognition caused by the value corresponding to the review register being overwritten.

Based on the above embodiment, the method also 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 functions of the electronic device.

In a possible implementation, the preset model may be a model corresponding to the most frequently used slave device in the electronic device. This increases the likelihood that the master will successfully configure the slave.

Based on the above embodiments, the master device may verify the model number of the slave device based on the identification register address and/or the review register address multiple times. In this way, misrecognition situations are further reduced.

It can be understood that the SPI interface compatible with slave devices of model A and model B in the process shown in Figure 9 is only an example. In actual applications, the SPI interface can also be compatible with more models of slave devices. The embodiment of this application is for SPI The model and type of interface-compatible slave devices are not limited.

In the above embodiment, the slave devices compatible with the SPI interface may be slave devices of different models of the same type, or may be slave devices of different types. The embodiments of the present application do not limit this.

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-down state to the power-on state, the master device also needs to identify and configure the slave device.

The method provided by the embodiment of the present application can also be applied when the slave device switches from the power-off state to the power-on state, and can also be applied during 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 be powered off and then powered on, or a slave device may latch up (lanch-up), causing the slave device to be powered off and then powered on.

The device identification method of the embodiment of the present application has been described above. The following describes the relevant device provided by the embodiment of the present application for performing the above device identification method. Those skilled in the art can understand that methods and devices can be combined and referenced with each other, and the relevant devices provided in the embodiments of the present application can perform the steps in the device identification method described above.

An embodiment of the present application also provides 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 functionality may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media may include computer storage media and communication media and may include any medium that can transfer a computer program from one place to another. The storage media can be any target media that can be accessed by the computer.

In a possible implementation, the 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 may be targeted to carry any other medium or medium that stores the required program code in the form of instructions or data structures and accessible by a computer. Also, any connection is properly termed a computer-readable medium. For example, if you use coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies (such as infrared, radio, and microwave) to transmit software from a website, server, or other remote source, coaxial Cables, fiber optic cables, twisted pairs, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of medium. Disk and optical disc, as used herein, includes optical disc, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

Embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine, such that the instructions executed by the processing unit of the computer or other programmable data processing device produce a A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.

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

Claims (15)

1. A device identification method, characterized in that it is applied to electronic equipment. The electronic equipment includes a master device and a slave device. The master device is connected to the slave device through a serial peripheral interface SPI bus. The master device stores There is 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. In the corresponding relationship, any slave device model corresponds to a a first address, a first preset value, a second address and a second preset value, and the 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, and obtains the first value corresponding to the first slave device model and the first value corresponding to the first slave device model. binary;

   When the master device determines that the first value is the same as the first preset value corresponding to the first slave device model, and the second value is consistent with the second preset value corresponding to the first slave device model. At the same time, 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 second slave device in the slave device corresponding to the first slave device model. The value of the register corresponding to the address.
2. The method according to claim 1, characterized in that the master device reads the value of the register in the slave device based on the first slave device model and the corresponding relationship, and obtains the first slave device model corresponding to the first slave device model. A value 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 the 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 the second address corresponding to the first slave device model to obtain the second value.
3. The method according to claim 2, characterized in that 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 first value based on the second address corresponding to the first slave device model. The second value is obtained from the value of the register in the device.
4. The method according to any one of claims 1-3, characterized in that the method further includes:

   When the master device determines that the first value is different from the first preset value corresponding to the first slave device model, or the master device determines that the second value is different from the first value corresponding to the first slave device model. When the two preset values are different, the master device reads the value of the register in the slave device based on the second slave device model and the corresponding relationship.
5. The method of claim 4, further comprising:

   When the value of the register in the slave device read by the master device based on the second slave device model and the corresponding relationship is different from the first preset value corresponding to the second slave device model, the master device reads based on the second slave device model and the corresponding relationship. The preset model configures the slave device, and the preset model is any slave device model in the corresponding relationship;

   Or, when the value of the register in the slave device read by the master device based on the second slave device model and the corresponding relationship is different from the second preset value corresponding to the second model, the master device reads based on the second slave device model and the corresponding relationship. The preset model configures the slave device.
6. The method according to any one of claims 1 to 5, characterized in that the master device configures the slave device based on the first slave device model, including:

   The master device writes the adjustment parameters corresponding to the first slave device model into the register of the slave device.
7. The method according to any one of claims 2 to 5, characterized in that, 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 Methods also include:

   The master device controls the slave device to reset.
8. The method according to any one of claims 1-7, characterized in that the fixed value is not zero.
9. The method according to any one of claims 1 to 8, characterized in that the register corresponding to the second address includes: a control register whose reading value is fixed and has not been read or written.
10. The method according to any one of claims 1 to 9, characterized in that, 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, it includes:

    The main 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.
11. The method according to any one of claims 1 to 10, characterized in that the corresponding relationship is stored in the main device in the form of a table.
12. The method according to any one of claims 1 to 11, characterized in that the main device includes but is not limited to: processor CPU or system-on-chip SOC, microcontroller MCU, microprocessor MPU or 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, display screens, and user identification modules .
13. An electronic device, characterized by including: a processor and a memory;

    The memory stores computer execution instructions;

    The processor executes computer-executable instructions stored in the memory, so that the processor executes the method according to any one of claims 1-12.
14. A computer-readable storage medium, characterized in that computer programs or instructions are stored in the computer-readable storage medium. When the computer programs or instructions are run, the implementation of any one of claims 1-12 is achieved. method described.
15. A computer program product, including a computer program or instructions, characterized in that when the computer program or instructions are executed by a processor, the method according to any one of claims 1-12 is implemented.

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