WO2023045806A1 - 触控屏中的位置信息计算方法和电子设备 - Google Patents

触控屏中的位置信息计算方法和电子设备 Download PDF

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Publication number
WO2023045806A1
WO2023045806A1 PCT/CN2022/118546 CN2022118546W WO2023045806A1 WO 2023045806 A1 WO2023045806 A1 WO 2023045806A1 CN 2022118546 W CN2022118546 W CN 2022118546W WO 2023045806 A1 WO2023045806 A1 WO 2023045806A1
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WIPO (PCT)
Prior art keywords
cpu
touch screen
touch
source data
trigger operation
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PCT/CN2022/118546
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English (en)
French (fr)
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WO2023045806A9 (zh
Inventor
丁岳
赵光旭
田均成
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荣耀终端有限公司
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Priority to EP22823315.1A priority Critical patent/EP4184297A4/en
Publication of WO2023045806A1 publication Critical patent/WO2023045806A1/zh
Publication of WO2023045806A9 publication Critical patent/WO2023045806A9/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/28—Handling requests for interconnection or transfer for access to input/output bus using burst mode transfer, e.g. direct memory access DMA, cycle steal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0016—Inter-integrated circuit (I2C)

Definitions

  • the present application relates to the field of terminal technology, and in particular to a method for calculating location information in a touch screen and electronic equipment.
  • An electronic device usually includes a touch screen, and the electronic device can receive a user's trigger operation on the touch screen, and execute a corresponding function according to the triggered position.
  • an electronic device can collect source data of a touch screen through a touch chip.
  • the micro-processing unit MCU on the touch chip can calculate the coordinates at which the user triggers the touch screen based on the collected source data.
  • the central processing unit CPU can read the calculated coordinates through the I2C bus. In this way, the CPU executes functions corresponding to the coordinates.
  • the above calculation of the coordinates of the user triggering the touch screen is performed in the MCU in the touch chip, and since the main frequency of the MCU is between 200 MHz and 400 MHz, the calculation speed is slow. In this way, based on the user's trigger operation, the electronic device has a relatively long delay in executing the function corresponding to the trigger operation.
  • the present application provides a method for calculating location information in a touch screen and an electronic device, which can shorten the time delay for the electronic device to execute a function corresponding to the trigger operation based on a user's trigger operation.
  • the present application provides a method for calculating position information in a touch screen, which is applied to an electronic device.
  • the electronic device includes a touch screen, a touch chip and a central processing unit CPU.
  • the method provided by the present application includes: when the touch screen receives a trigger operation, the touch chip samples the source data generated by the trigger operation in the touch screen.
  • the touch chip transmits source data to the CPU through a high-speed serial bus, wherein the source data is used to indicate the capacitance of the touch chip.
  • the CPU calculates the position information of the trigger operation on the touch screen based on the source data.
  • the touch chip since the touch chip transmits the source data generated by the trigger operation through the high-speed serial bus, and the high-speed serial bus has a relatively high transmission rate. In this way, the first duration t1 for the touch chip to transmit the source data generated by the trigger operation is relatively short. Furthermore, because the calculation of the position information of the trigger operation on the touch screen is being performed, and because the main frequency of the CPU is relatively high, the calculation rate of the CPU is also high. In this way, the second duration t2 for the CPU to calculate the coordinates of the touch screen triggered by the user is also relatively short. In this way, the sum of the first duration t1 and the second duration t2 can be made smaller.
  • the electronic device further includes a bus controller and a direct memory access DMA
  • the touch chip transmits source data to the CPU through a high-speed serial bus, including: the touch chip controls the CPU to wake up the data transmission thread.
  • the CPU controls the bus controller to identify the DMA flags. Wherein, the flag is used to indicate that the DMA is occupied by the bus controller.
  • the bus controller copies the source data from the touch chip to the DMA through the high-speed serial bus.
  • the bus controller controls the CPU to fetch source data from the DMA.
  • the priority preset in the CPU is used to indicate that the priority of waking up the data transmission thread is higher than the priority of other pending threads of the CPU, and the preset value in the bus controller is used to indicate that the DMA is occupied.
  • the priority of the thread is higher than the priority of other pending threads of the bus controller.
  • the first duration t1 for the touch chip to transmit the source data generated by the trigger operation can be further shortened. Furthermore, the delay t3 from when the touch screen of the electronic device receives the trigger operation to when the third-party application executes the function corresponding to the control at the location information is further shortened.
  • the method provided in the present application further includes: controlling the data transmission thread to start sleeping.
  • the bus controller controls the CPU to extract source data from the DMA, including: the bus controller controls the CPU to wake up the data transmission thread; after the CPU wakes up the data transmission thread, extracts the source data from the DMA.
  • the CPU can also process other threads to be processed during the sleep process of the data transmission thread.
  • the touch chip samples the source data generated by the trigger operation in the touch screen, including: the touch chip transmits a sampling pulse sequence to the touch screen according to a preset sampling period to sample the touch screen Source data resulting from triggered actions in .
  • the touch chip transmits the source data sampled by the Nth group of sampling pulse sequences, which is executed simultaneously with the touch chip emitting the N+1 group of sampling pulse sequences, N is an integer greater than 1, and the sampling period is less than a preset duration threshold.
  • the fifth duration t5 is equal to the difference between the sampling period T1 and the fourth duration t4 maintained by the pulse sequence. It can be understood that, in the case that the preset sampling period is less than the preset duration threshold and the fourth duration t4 maintained by the pulse sequence remains unchanged, the fifth duration t5 can be made shorter. In this way, even if the timing of the user's trigger operation on the touch screen is between two sets of sampling pulse sequences, the delay from the sampling of the Nth group of sampling pulse sequences to the user's trigger operation on the touch screen is shortened.
  • the fifth duration t5 is a part of the above-mentioned delay t3, if the fifth duration t5 is short, this can further shorten the period from when the touch screen receives the trigger operation to when the third-party application executes the position information.
  • the time delay t3 of the function is a part of the above-mentioned delay t3, if the fifth duration t5 is short, this can further shorten the period from when the touch screen receives the trigger operation to when the third-party application executes the position information.
  • the preset duration threshold is less than or equal to 2.5ms.
  • the touch chip samples the source data generated by the trigger operation in the touch screen, including: the touch chip transmits a sampling pulse sequence to the touch screen according to a preset sampling period to sample the touch screen Source data resulting from triggered actions in .
  • the number of sampling pulses in the sampling pulse sequence is less than 30.
  • the fourth duration t4 of the pulse sequence can be kept shorter (that is, the sampling duration is further shortened).
  • the delay t3 from when the touch screen receives the trigger operation to when the third-party application executes the function corresponding to the control at the location information can be further shortened (that is, the sampling delay is shortened) .
  • the sampling voltage of the sampling pulse is greater than 3V.
  • the method provided in the present application further includes: the CPU filters the obtained source data by using a filtering algorithm.
  • the high-speed serial bus is a serial peripheral interface (SPI) bus.
  • SPI serial peripheral interface
  • the data transfer rate can reach 20Mbps. It can be seen that the data transmission rate of the SPI bus is relatively high. Furthermore, the above-mentioned first time period t1 for the CPU to read the source data from the touch chip or the touch chip to write the source data to the CPU can be made shorter.
  • the method provided in the present application further includes: the CPU transparently transmits the location information to a third-party application, so that the third-party The application executes the function corresponding to the control at the location information.
  • the present application also provides an electronic device, including a touch screen, a touch chip, and a central processing unit CPU.
  • the touch screen receives a trigger operation
  • the electronic device executes the touch screen provided in the first aspect of the present application.
  • Figure 1 is After the interface slides upwards, the video control 401 is triggered to play the interface diagram of the video;
  • FIG. 2 is a schematic diagram of the structure of executing the function corresponding to the control at the location information when the touch screen of the electronic device is triggered;
  • FIG. 3 is a schematic diagram of a hardware architecture of an electronic device provided in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the software architecture of the electronic device provided by the embodiment of the present application.
  • FIG. 5 is a schematic diagram of the structure of executing the function corresponding to the control at the location information when the touch screen of the electronic device provided by the embodiment of the present application is triggered;
  • FIG. 6 is a flow chart of a method for calculating position information in a touch screen according to an embodiment of the present application
  • FIG. 7 is a block diagram of the calculation of location information provided by the embodiment of the present application.
  • FIG. 8 is one of the schematic diagrams of the touch chip transmitting the sampling pulse sequence based on the preset sampling period provided by the embodiment of the present application;
  • FIG. 9 is the second schematic diagram of the touch chip transmitting the sampling pulse sequence based on the preset sampling period provided by the embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a data transmission scheduling method provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of an interface of a touch screen triggered by multiple fingers provided in an embodiment of the present application.
  • FIG. 12 is one of the schematic diagrams for calculating the duration of position information when the touch screen is triggered by multiple fingers compared to when it is triggered by a single finger;
  • FIG. 13 is the second schematic diagram of the time length for calculating position information when the touch screen is triggered by multiple fingers compared to when it is triggered by a single finger;
  • FIG. 14 is a schematic diagram of transmitting a sampling pulse sequence when the number of sampling pulses in the pulse sequence is less than 30 provided by the embodiment of the present application;
  • FIG. 15 is a block diagram of a location information calculation method provided by an embodiment of the present application.
  • FIG. 16 is a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect.
  • the first value and the second value are only used to distinguish different values, and their sequence is not limited.
  • words such as “first” and “second” do not limit the number and execution order, and words such as “first” and “second” do not necessarily limit the difference.
  • At least one means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship.
  • “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • At least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • An electronic device usually includes a touch screen, and the electronic device can receive a user's trigger operation on the touch screen, and execute a corresponding function according to the triggered position. It can be understood that, based on the user's trigger operation, the electronic device executes the function corresponding to the trigger operation.
  • the delay includes: a first time period t1 for the touch chip to transmit data to the CPU and a second time period t2 for calculating the position information.
  • the touch screen of the electronic device displays the In the interface
  • the touch operation of sliding upward by the user is received, the content displayed on the interface of the touch screen changes, and becomes the interface shown in b in FIG. 1 .
  • the touch chip of the electronic device samples the source data generated by the trigger operation in the touch screen through a 3V sampling pulse sequence .
  • the MCU of the touch chip of the electronic device calculates the position information of the trigger operation on the touch screen based on the source data. Because the main frequency of the MCU of the touch chip is low, the calculation speed is slow.
  • the second duration t2 for calculating the location information of the triggering operation on the touch screen will be relatively long.
  • the second duration t2 is 4ms.
  • the touch chip transmits the position information to the CPU of the electronic device through the I2C bus, wherein the first time period for the touch chip to transmit the position information is t1 (for example, the first time period t1 may be 0.2 ms).
  • the CPU controls the touch screen to switch to the interface shown by c in FIG. 1 according to the position information to play the video.
  • the sum of the second time period t2 and the first time period t1 will be relatively large.
  • the sum of the second duration t2 and the first duration t1 may be 4.2ms. In this way, it will eventually lead to a long delay for the CPU to control the touch screen to switch to the interface shown in c in FIG. 1 according to the position information.
  • this application provides a method for calculating position information in a touch screen.
  • the touch chip of the electronic device samples the source data generated by the trigger operation in the touch screen; the touch chip of the electronic device passes through the serial peripheral Interface high-speed serial bus, transfer source data to CPU. Wherein, the source data is used to indicate the capacitance of the touch chip.
  • the CPU of the electronic device calculates the position information of the trigger operation on the touch screen based on the source data. Because the touch chip transmits the source data generated by the trigger operation through the high-speed serial bus, and because the transmission rate of the high-speed serial bus in high-speed mode is greater than a preset rate threshold. In this way, the first duration t1 for the touch chip to transmit the source data generated by the trigger operation is relatively short.
  • the second time period t2 for the CPU to calculate the position where the user triggers the touch screen is also relatively short.
  • the sum of the first duration t1 and the second duration t2 is also smaller. In this way, the delay for the electronic device to execute the function corresponding to the trigger operation based on the trigger operation of the user is shortened.
  • the above-mentioned electronic device may be a terminal, a user equipment (user equipment, UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT) and the like.
  • the terminal device can be mobile phone, smart TV, wearable device, tablet computer (Pad), computer with wireless transceiver function, virtual reality (virtual reality, VR) terminal device, augmented reality (augmented reality, AR) terminal 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.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the electronic device.
  • FIG. 3 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an electronic device applicable to an embodiment of the present application.
  • the electronic device may include: a central processing unit (central processing unit, CPU) 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a serial external Interface (serial peripheral interface, SPI) bus 131, charging management module 140, power management module 141, battery 142, antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B , microphone 170C, earphone jack 170D, sensor 180, button 190, motor 191, camera 193, touch screen 194, subscriber identification module (subscriber identification module, SIM) card interface 195, touch chip 196, etc.
  • a central processing unit central processing unit, CPU
  • an external memory interface 120 an internal memory 121
  • USB universal serial bus
  • SPI serial external Interface
  • the central processing unit 110 may be the nerve center and command center of the electronic device.
  • the processor can generate an operation control signal according to the instruction opcode and the timing signal, and complete the control of fetching and executing the instruction.
  • a memory may also be provided in the central processing unit 110 for storing instructions and data.
  • the memory in the central processing unit 110 is a cache memory.
  • the memory may hold instructions or data used or recycled by the central processing unit 110 . If the central processing unit 110 needs to use the instruction or data again, it can be directly called from the memory. This avoids repeated access, reduces the waiting time of the central processing unit 110, and thus improves the efficiency of the electronic device.
  • central processing unit 110 may include one or more interfaces.
  • the interface can include integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, pulse code modulation (pulse code modulation, PCM) interface, universal asynchronous receiver/transmitter (universal asynchronous receiver/transmitter, UART) interface, mobile industry processor interface (mobile industry processor interface, MIPI), general-purpose input and output (general-purpose input/output, GPIO) interface, subscriber identity module (subscriber identity module, SIM) interface, and/or universal serial bus (universal serial bus, USB ) interface, and SPI interface, etc.
  • I2S integrated circuit sound
  • PCM pulse code modulation
  • PCM pulse code modulation
  • UART universal asynchronous receiver/transmitter
  • mobile industry processor interface mobile industry processor interface
  • MIPI mobile industry processor interface
  • general-purpose input and output general-purpose input/output
  • GPIO general-purpose input/output
  • subscriber identity module subscriber identity module
  • USB universal serial bus
  • the interface connection relationship between the modules shown in the embodiment of the present application is a schematic description, and does not constitute a structural limitation of the electronic device.
  • the electronic device may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.
  • the wireless communication function of the electronic device can be realized by 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.
  • Each antenna in an electronic device can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas.
  • Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network.
  • the antenna may be used in conjunction with a tuning switch.
  • the wireless communication module 160 can provide wireless local area networks (wireless local area networks, WLAN), bluetooth, global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), NFC, infrared Technology (infrared, IR) and other wireless communication solutions.
  • the wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the central processing unit 110 .
  • the wireless communication module 160 can also receive the signal to be sent from the central processing unit 110 , frequency-modulate it, amplify it, and convert it into electromagnetic wave through the antenna 2 for radiation.
  • the electronic device can realize the display function through the GPU, the touch screen 194 , and the application processor.
  • Application processors may include NPUs and DPUs.
  • the GPU is a microprocessor for image processing, connected to the touch screen 194 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering.
  • Central processing unit 110 may include one or more GPUs that execute instructions to generate or change display information.
  • NPU is a neural network (neural-network, NN) computing processor, by referring to the biological neural network structure.
  • DPU is also called display subsystem (Display Sub-System, DSS), and DPU is used for adjusting the color of touch screen 194, and DPU can adjust the color of touch screen through three-dimensional lookup table (3D look up table, 3D LUT). Make adjustments.
  • the touch screen 194 is used for displaying images, videos and the like.
  • the touch screen 194 includes a display panel.
  • the display panel can adopt liquid crystal touch screen (liquid crystal display, LCD), organic light-emitting diode (organic light-emitting diode, OLED), active matrix organic light-emitting diode or active-matrix organic light-emitting diode (active-matrix organic light emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diodes (quantum dot light emitting diodes, QLED), etc.
  • the electronic device may include 1 or N touch screens 194 , where N is a positive integer greater than 1.
  • N is a positive integer greater than 1.
  • the touch chip 196 can periodically transmit a sampling pulse sequence to the touch screen 194 to collect source data generated by the touch screen 194 .
  • the source data includes voltage signal data or current signal data of the touch screen 194 .
  • the touch chip 196 can transmit voltage signal data or current signal data to the central processing unit 110 through the SPI bus 131 .
  • the touch chip 196 is also integrated with an MCU, wherein the main frequency of the MCU is between 200 MHz and 400 MHz, and the MCU can be used for analog/digital conversion and other processing on signals.
  • the touch chip 196 can transmit voltage signal data or current signal data to the central processing unit 110 through the SPI bus.
  • the SPI bus 131 is a high-speed, full-duplex, synchronous communication bus, and only occupies four wires on the pins of the chip, which saves the pins of the chip and saves space.
  • the electronic device can realize shooting function through ISP, one or more cameras 193 , video codec, GPU, one or more touch screens 194 and application processor.
  • 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.
  • the external memory card communicates with the central processing unit 110 through the external memory interface 120 to realize the data storage function.
  • the internal memory 121 may be used to store one or more computer programs including instructions.
  • the central processing unit 110 can execute the above-mentioned instructions stored in the internal memory 121 to make the electronic device execute various functional applications and data processing.
  • the internal memory 121 may include an area for storing programs and an area for storing data.
  • the stored program area can store an operating system; the stored program area can also store one or more application programs (such as a gallery, contacts, etc.) and the like.
  • the data storage area can store data (such as photos, contacts, etc.) created during the use of the electronic device.
  • the electronic device can implement audio functions through the audio module 170 , the speaker 170A, the receiver 170B, the microphone 170C, and the application central processing unit. 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 signal.
  • Speaker 170A also referred to as a "horn" is used to convert audio electrical signals into sound signals.
  • the electronic device can listen to music through speaker 170A, or listen to hands-free calls.
  • the receiver 170B is used for converting audio electrical signals into sound signals. When the electronic device receives a call or a voice message, it can listen to the voice by putting the receiver 170B close to the human ear.
  • the microphone 170C is used to convert sound signals into electrical signals.
  • the pressure sensor 180A is used to sense the pressure signal and convert the pressure signal into an electrical signal.
  • the pressure sensor 180A can be disposed on the touch screen 194 .
  • the gyro sensor 180B can be used to determine the motion posture of the electronic device.
  • the air pressure sensor 180C is used to measure air pressure.
  • the magnetic sensor 180D includes a Hall sensor.
  • the acceleration sensor 180E can detect the magnitude of the acceleration of the electronic device in various directions (generally three axes).
  • the distance sensor 180F is used to measure the distance.
  • Proximity light sensor 180G may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes.
  • the ambient light sensor 180L is used for sensing ambient light brightness.
  • the fingerprint sensor 180H is used to collect fingerprints.
  • the temperature sensor 180J is used to detect temperature.
  • Touch sensor 180K also known as "touch device”.
  • the touch sensor 180K can be disposed on the touch screen 194, and the touch sensor 180K and the touch screen 194 form a touch screen, also called “touch screen”.
  • the bone conduction sensor 180M can acquire vibration signals.
  • the keys 190 include a power key, a volume key and the like.
  • the key 190 may be a mechanical key. It can also be a touch button.
  • the electronic device can receive key input and generate key signal input related to user settings and function control of the electronic device.
  • the indicator 192 can be an indicator light, and can be used to indicate charging status, power change and the like.
  • the software system of the electronic device may adopt a layered architecture, an event-driven architecture, a micro-kernel architecture, a micro-service architecture, or a cloud architecture.
  • the Android system with layered architecture is taken as an example to illustrate the software structure of the electronic device.
  • FIG. 4 is a software structural block diagram of an electronic device applicable to an embodiment of the present application.
  • the layered architecture divides the software system of electronic equipment into several layers, and each layer has a clear role and division of labor. Layers communicate through software interfaces.
  • the Android system can be divided into five layers, namely applications, application framework, Android runtime, system library, and hardware abstraction layer. layer, HAL) and the kernel layer (kernel).
  • the application program layer may include a series of application program packages, and the application program layer runs the application program by calling an application program interface (application programming interface, API) provided by the application program framework layer.
  • application program interface application programming interface, API
  • the application package can include WeChat, camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, SMS and other applications.
  • the application framework layer provides API and programming framework for applications in the application layer.
  • the application framework layer includes some predefined functions. As shown in Figure 4, the application framework layer can include window manager, content provider, view system, phone manager, resource manager, notification manager, etc.
  • the Android runtime includes core libraries and a virtual machine.
  • the Android runtime is responsible for the scheduling and management of the Android system.
  • the core library consists of two parts: one part is the function function that the java language needs to call, and the other part is the core library of Android.
  • the application layer and the application framework layer run in virtual machines.
  • the virtual machine executes the java files of the application program layer and the application program framework layer as binary files.
  • the virtual machine is used to perform functions such as object life cycle management, stack management, thread management, security and exception management, and garbage collection.
  • a system library can include multiple function modules.
  • the hardware abstraction layer can contain multiple library modules, such as camera library modules, motor library modules, etc.
  • the Android system can load corresponding library modules for the device hardware, and then realize the purpose of the application framework layer accessing the device hardware.
  • the kernel layer is the layer between hardware and software.
  • the kernel layer is used to drive the hardware and make the hardware work.
  • the kernel layer includes at least a display driver, a camera driver, an audio driver, a sensor driver, a motor driver, etc., which are not limited in this embodiment of the present application.
  • the mobile phone 100 includes a touch screen 194 , a touch chip 196 , an SPI bus 131 and a CPU 110 .
  • the touch screen 194 is electrically connected to the touch chip 196
  • the CPU 110 is in communication with the touch chip 196 through the SPI bus 131 .
  • FIG. 6 is a schematic flowchart of a method for calculating position information in a touch screen provided by an embodiment of the present application. As shown in FIG. 6, the position information calculation method in the touch screen provided by the embodiment of the present application includes:
  • S601 The touch screen 194 of the mobile phone 100 displays a first interface.
  • the first interface may be circle of friends interface.
  • the circle of friends interface includes a video control 101.
  • the first interface may also be a photo preview interface of a camera application, an interface of a game application, a system desktop, etc., which are not limited herein.
  • the touch screen 194 may also be in an off state. Understandably, when the touch screen 194 is in the off state, the above S601 can be ignored.
  • the touch chip 196 can periodically transmit a sampling pulse sequence to the touch screen 194 to collect source data generated by the touch screen 194 , wherein the source data is a voltage signal or a current signal of the touch screen 194 . Understandably, the source data can be used to indicate the capacitance of the touch chip.
  • the sampling pulse sequence emitted by the touch chip 196 can be sampled and displayed on the touch screen 194 The source data generated in the circle of friends interface.
  • the sampling pulse sequence emitted by the touch chip 196 can sample the source data generated by the trigger operation in the touch screen 194 .
  • the source data sampled by the touch chip 196 is different from the source data sampled when the touch screen 194 is not triggered.
  • the touch chip 196 of the mobile phone 100 transmits the source data to the CPU 110 through the SPI bus 131 .
  • S603 includes but not limited to the following two ways:
  • the first type the CPU 110 reads the sampled source data from the touch chip 196 through the SPI bus 131 .
  • the sampling pulse sequence in S602 includes a plurality of sampling pulses, and each sampling pulse will sample a piece of sub-data generated by the touch screen 194 .
  • the touch chip 196 processes and packs the sub-data obtained by sampling into source data.
  • the CPU 110 reads source data through the SPI bus 131 .
  • the second type the touch chip 196 writes the sampled source data to the CPU 110 through the SPI bus 131 .
  • the sampling pulse sequence in S602 includes a plurality of sampling pulses, and each sampling pulse will sample a piece of sub-data generated by the touch screen 194 .
  • the touch chip 196 processes and packs the sub-data obtained by sampling into source data.
  • the touch chip 196 writes source data into the CPU 110 through the SPI bus 131 .
  • the data transfer rate can reach 20Mbps. It can be seen that the data transmission rate of the SPI bus 131 is relatively high. Furthermore, the above-mentioned first duration t1 for the CPU 110 to read the source data from the touch chip 196 or for the touch chip 196 to write the source data to the CPU 110 can be made shorter. Usually, the first duration t1 is less than 1.5ms.
  • the source data sampled by the above-mentioned touch chip 196 is an analog signal, and before the touch chip 196 transmits the source data to the CPU 110, it needs to convert the analog signal into a digital signal, and perform format processing on the digital signal, so that the CPU 110 can identify.
  • the CPU 110 of the mobile phone 100 calculates the position information of the trigger operation on the touch screen based on the source data.
  • the mobile phone 100 detects the variation of the source data in the form of a digital signal (such as the variation of the current signal or the variation of the voltage signal) to preliminarily determine the signal triggered by the user's finger.
  • the mobile phone 100 divides the preliminarily determined signal triggered by the user into regions to obtain sub-signals corresponding to each region.
  • the mobile phone 100 further checks whether the sub-signals corresponding to each area are signals triggered by the user's finger. If so, the mobile phone 100 determines the centroid coordinates of the sub-area when it is triggered by the user's finger according to the signal distribution in each sub-area. (that is, in the embodiment corresponding to Fig.
  • the mobile phone 100 can also track the position of the finger on the touch screen 194 so as to determine the movement track of the finger on the touch screen 194 .
  • the above process of calculating the position information of the trigger operation on the touch screen is relatively complicated, and the main frequency of the CPU 110 is usually greater than 1.5GZ. It can be understood that when the main frequency of the CPU 110 is higher, the clock frequency of the CPU 110 is also higher, that is, the stronger the computing power of the CPU 110, the faster the rate of calculating the location information of the touch screen that triggers the operation. Furthermore, the second duration t2 for the CPU 110 to calculate the location information of the trigger operation on the touch screen is also relatively short. Usually, the second duration t2 is less than 1 ms.
  • S605 The CPU 110 of the mobile phone 100 transparently transmits the location information to the third-party application corresponding to the first interface 101, so that the third-party application executes a function corresponding to the control at the location information.
  • the third-party application corresponding to the first interface 101 is CPU110 control of mobile phone 100 Switch to the interface c in Figure 1 to play the video.
  • control Switch to the interface c in FIG. 1 to play the video that is, the function corresponding to the control at the location information (ie, the video control 101 ).
  • S605 can be omitted.
  • the delay t3 from when the touch screen 194 of the mobile phone 100 receives the trigger operation to when the third-party application executes the function corresponding to the control at the location The sum of the first duration t1 for the CPU 110 to transmit the source data and the second duration t2 for the CPU 110 to calculate the location information of the trigger operation on the touch screen.
  • the position information calculation method in the touch screen provided by the embodiment of the present application, because the touch chip 196 transmits the source data generated by the trigger operation through the SPI bus 131, and the SPI bus 131 has a relatively high transmission rate. In this way, the first duration t1 during which the touch chip 196 transmits the source data generated by the trigger operation is relatively short. Furthermore, because the calculation of the position information of the trigger operation on the touch screen is being performed, and because the main frequency of the CPU 110 is high, the calculation rate of the CPU 110 is also high. In this way, the second duration t2 for the CPU 110 to calculate the coordinates of the touch screen 194 triggered by the user is also relatively short. In this way, the sum of the first duration t1 and the second duration t2 can be made smaller.
  • how to shorten the sum of the first duration t1 and the second duration t2 is used as an example to illustrate how to shorten the duration from the time when the touch screen 194 of the mobile phone 100 receives the trigger operation to the time when the third-party application executes.
  • the time delay t3 of the function corresponding to the control at the position information In conjunction with FIG. 8, how to shorten the sampling period T1 on the basis of shortening the sum of the first duration t1 and the second duration t2, so as to further shorten the time from the touch screen 194 of the mobile phone 100 to receive the trigger operation, to the second The delay time t3 for the third-party application to execute the function corresponding to the control at the location information.
  • the above-mentioned touch chip 196 can transmit a sampling pulse sequence 801 to the touch screen 194 every preset sampling period T1 .
  • the start time S1 preset by the touch chip 196 to transmit the source data sampled by the Nth group of sampling pulse sequences 801 to the CPU 110 may be: the start time S1 of the touch chip 196 transmitting the N+1th group of sampling pulse sequences 801 to the touch screen 194 start moment.
  • N is an integer greater than 1.
  • the touch chip 196 can transmit the N+1th group of sampling pulses to the touch screen 194
  • the sequence 801 is processed in parallel with the touch chip 196 transmitting the source data to the CPU 110 through the SPI bus 131 and the CPU 110 calculating the position information, as a prerequisite for shortening the sampling period T1.
  • the preset sampling period T1 of the mobile phone 100 may be smaller than the preset duration threshold.
  • the preset sampling period T1 may also be relatively small.
  • the sampling period T1 can also be preset to be less than 2.5ms (that is, the sampling rate of the touch chip 196 is greater than 400HZ).
  • the sampling period T1 can also be preset as 2.5ms.
  • the fourth duration of the pulse sequence is t4, and the fifth duration between each two sampling pulse sequences 801 is t5.
  • the fifth duration t5 is equal to the difference between the sampling period T1 and the fourth duration t4 maintained by the pulse sequence. It can be understood that, in the case that the preset sampling period T1 of the mobile phone 100 is less than the preset duration threshold and the fourth duration t4 of the pulse sequence remains unchanged, the fifth duration t5 can be made shorter. In this way, even when the user's trigger operation on the touch screen 194 is between two sets of sampling pulse sequences 801 , the delay from sampling the Nth group of sampling pulse sequences 801 to the user's trigger operation on the touch screen 194 is shortened.
  • the fifth duration t5 is a part of the above-mentioned delay t3.
  • this can shorten the time from the touch screen 194 of the mobile phone 100 to receive the trigger operation.
  • the delay t3 until the third-party application executes the function corresponding to the control at the location information further improves the user experience.
  • the preset sampling period T1 of the mobile phone 100 can also be smaller, so that every two The fifth duration t5 between groups of sampling pulse sequences is smaller. Furthermore, the delay t3 from when the touch screen 194 of the mobile phone 100 receives the trigger operation to when the third-party application executes the function corresponding to the control at the location information can be made smaller.
  • the first duration t1 for transmitting the source data from the touch chip 196 to the CPU 110 is shortened.
  • the first duration t1 for transmitting source data from the touch chip 196 to the CPU 110 can be further shortened based on the scheduling manner of data transmission.
  • the mobile phone 100 may further include an SPI controller 1001 , wherein the SPI bus 131 , the SPI controller 1001 and the CPU 110 are sequentially connected in communication.
  • the SPI controller 1001 and the CPU 110 can be integrated into a system-on-a-chip (SOC) 1002 in the mobile phone 100 .
  • the SPI controller 1001 is also connected with a DMA (Direct Memory Access) 1003, and the DMA 1003 can perform data transmission between the SPI controller 1001 and the touch chip 196 without the participation of the CPU 110 in the transmission process.
  • DMA Direct Memory Access
  • the priority preset in the CPU 110 to indicate that the thread that wakes up the data transmission is higher than the priority of other threads to be processed in the CPU 110
  • the priority preset in the SPI controller 1001 to indicate that the thread occupying the DMA 1003 is higher The priorities of other pending threads of the SPI controller 1001.
  • the scheduling method of data transmission includes the following steps: Step 1: The touch chip 196 transmits a sampling pulse sequence to the touch screen 194 to sample source data. Step 2: Before the touch chip 196 transmits data, the sampled analog signal can be converted into a digital signal, and the digital signal can be packaged to obtain source data. Wherein, the size of the source data is usually between 2kb-4kb. Step3: The touch chip 196 sends a first notification (the first notification is the interrupt signal in FIG. 10 ) to the CPU 110 after the packaging is completed, and the first notification is used to instruct the CPU 110 to wake up the data transmission thread.
  • the first notification is the interrupt signal in FIG. 10
  • the CPU 110 determines that the priority of the data transmission thread is higher than other threads to be processed in the CPU 110, then the CPU 110 does not need to wait After the processing of other threads to be processed is completed, the data transmission thread can be woken up, so that the time for the touch chip 196 to wake up the data transmission thread of the CPU 110 is relatively short.
  • Step4 After the CPU 110 wakes up the data transmission thread, it sends a second notification to the SPI controller 1001 , wherein the second notification is used to instruct the SPI controller 1001 to occupy the DMA 1003 .
  • Step5 After the CPU 110 sends the second notification to the SPI controller 1001, the control data transmission thread starts to sleep. In this way, during the sleep process of the data transmission thread, the CPU 110 can also process other threads to be processed.
  • the SPI controller 1001 After receiving the second notification, the SPI controller 1001 flags the DMA, where the flag is used to indicate that the DMA is occupied by the SPI controller 1001 . Since the priority mark for indicating the priority of the thread occupying the DMA1003 in the SPI controller 1001 is higher than the priority threshold, it is determined that the priority of the thread occupying the DMA1003 is higher than other threads to be processed in the SPI controller 1001, then The SPI controller 1001 occupies the DMA 1003 without waiting for other threads to be processed to finish processing, so that the duration of occupying the DMA 1003 is relatively small.
  • Step 6 the SPI controller 1001 starts to copy the source data from the touch chip 196 through the SPI bus 131 , and temporarily stores the copied source data to the DMA1003 .
  • Step7 After the copy is completed, the SPI controller 1001 sends a third notification to the CPU 110, and the third notification is used to instruct the CPU 110 to extract the source data. Since the priority of the preset data transmission thread in the CPU 110 is higher than the priority of other threads to be processed in the SPI controller 1001, the CPU 110 determines that the priority of the data transmission thread is higher than other threads to be processed in the CPU 110, then The CPU 110 can wake up the data transmission thread without waiting for other threads to be processed to finish processing, and the duration of waking up the data transmission thread is relatively short.
  • Step8 After the data transmission thread of CPU110 is woken up, extract the copied source data from DMA1003. Furthermore, the touch control chip 196 transmits source data to the CPU 110 through the SPI bus 131 .
  • the duration of waking up the data transmission thread of the CPU 110 is relatively small, the duration of occupying the DMA 1003 is also relatively small. In this way, the rate at which the touch chip 196 transmits the source data to the CPU 110 can be increased, and the first duration t1 for the touch chip 196 to transmit the source data to the CPU 110 can be shortened. In this way, the sum of the first duration t1 and the second duration t2 can be further shortened. It can be understood that, based on the same principle as the above embodiment corresponding to FIG.
  • the sampling period T1 can also be further smaller, so that the slave mobile phone can be further shortened.
  • the touch screen 194 of 100 receives the trigger operation, and the delay time t3 until the third-party application executes the function corresponding to the control at the location information.
  • the case where the touch screen 194 is triggered by a single finger of the user is taken as an example to illustrate how to make the sampling period T1 smaller.
  • the following describes how to make the sampling period T1 smaller when the touch screen 194 is triggered by multiple fingers of the user with reference to FIGS. 11-13 .
  • the first interface displayed on the touch screen 194 is an interface of a game application.
  • the interface of the game application includes control A, control B, control C, and control D.
  • the game interface also includes a game character P1 and a game character P2.
  • control A, control B, and control C can be triggered at the same time.
  • the touch chip 196 samples the source data when the touch screen 194 is triggered with the control A, the control B, and the control C. Understandably, when the touch screen 194 is triggered by more fingers of the user, the touch chip 196 samples more source data.
  • the touch chip 196 transmits the sampled source data to the CPU 110 through the SPI bus 131 .
  • the CPU 110 of the mobile phone 100 calculates the position information of the trigger operation on the touch screen based on the source data. It can be understood that the location information calculated by the CPU 110 based on the source data includes the coordinates of the user's finger triggering control A, the user's finger triggering control B, and the user's finger triggering control C coordinates. Furthermore, based on the coordinates of the control A, the coordinates of the control B and the coordinates of the control C, the CPU 110 controls the game character P1 to attack the game character P2 with a heavy hand.
  • the calculation of the position information of the trigger operation on the touch screen is performed by the CPU 110 .
  • the main frequency of the CPU 110 is relatively high, so when more source data needs to be processed, the second duration t2 for the CPU 110 to calculate the location information of the trigger operation on the touch screen will not change.
  • the sum of the first duration t1 and the second duration t2 will not be extended because the touch screen 194 is extended by the user's fingers.
  • the sampling period T1 can still be kept smaller.
  • the delay t3 from when the user triggers the control A, the control B, and the control C to controlling the game character P1 to attack the game character P2 with a heavy hand remains small.
  • the touch screen 194 may also be triggered by the number of fingers of the user such as 4 fingers, 5 fingers, and 6 fingers. As shown in FIG. 13 , in the prior art solution, when the touch screen 194 is triggered by the user using 1 finger to 10 fingers respectively, the sampling period T1 needs to gradually increase from 2.7 ms to 8 ms. However, in the embodiment of the present application, when the touch screen 194 is triggered by the user using 1 to 10 fingers, the sampling period T1 may remain unchanged at 2.5 ms.
  • the delay t3 from when the touch screen 194 of the mobile phone 100 receives a trigger operation to when the third-party application executes the function corresponding to the control at the position information is also smaller. Understandably, it can be seen from FIG. 13 that when the number of fingers triggered by the user on the touch screen 194 is less than 6, the more fingers on the touch screen 194 are triggered by the user. Compared with the prior art, this embodiment of the present application The effect of shortening the scheme delay t3 is more obvious.
  • shortening the sampling period T1 on the basis of shortening the sum of the first duration t1 and the second duration t2 is taken as an example to illustrate how to further shorten The time delay t3 until the trigger operation starts and the third-party application executes the function corresponding to the control at the location information.
  • the third-party application executes the function corresponding to the control at the location information.
  • the number of sampling pulses in the sampling pulse sequence 801 transmitted by the touch control chip 196 of the mobile phone 100 may be less than a preset number threshold.
  • the number of sampling pulses may be less than 30.
  • the number of sampling pulses may be 18, 21, and 24, etc., which is not limited here.
  • the fourth duration t4 of the pulse sequence can be kept shorter (that is, the sampling duration is further shortened).
  • the fourth duration t4 is a part of the above-mentioned delay t3.
  • the delay t3 from when the touch screen 194 of the mobile phone 100 receives the trigger operation to when the third-party application executes the function corresponding to the control at the location information can be further shortened (that is, shortened Sampling delay), which further improves the user experience.
  • the sampling voltage of the sampling pulses in the sampling pulse sequence 801 emitted by the touch chip 196 of the mobile phone 100 can be greater than preset voltage thresholds.
  • the voltage of the sampling pulse may be greater than 3V.
  • the voltage of the sampling pulse may be 4V, 5V, 6V, or 7V, etc., which is not limited herein. Understandably, when the voltage of the sampling pulse is higher, the reliability of the source data collected by the sampling pulse sequence 801 is higher.
  • the CPU 110 in order to improve the reliability of the location information calculated by the CPU 110, as shown in FIG. 15, after the CPU 110 obtains the source data sampled by the touch chip 196, it needs to use a filtering algorithm to filter the obtained source data to reduce the collected source data. Noise in the data. Furthermore, the reliability of the position information calculated by the CPU 110 based on the filtered source data is higher.
  • the trigger operation mentioned may include: click operation, long press operation, and gesture trigger operation, etc., which are not limited here.
  • FIG. 16 is a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.
  • the communication interface 1603 is used as an example for illustration), the touch chip 1606, and the touch screen 1607.
  • the central processing unit 1601 can be a general central processing unit (central processing unit, CPU), a micro central processing unit, a specific application integrated circuit (application-specific integrated circuit, ASIC), or one or more for controlling the application program integrated circuit for program execution.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • High-speed serial bus 1604 may include circuitry to transfer information between the components described above. When the high-speed serial bus 1604 is in high-speed mode, the data transfer rate can reach 20Mbps. It can be seen that the high-speed serial bus 1604 transmits data at a relatively high rate. Wherein, the high-speed serial bus 1604 may be an SPI bus.
  • the communication interface 1603 uses any device such as a transceiver for communicating with other devices or communication networks, such as Ethernet, wireless local area networks (wireless local area networks, WLAN) and so on.
  • a transceiver for communicating with other devices or communication networks, such as Ethernet, wireless local area networks (wireless local area networks, WLAN) and so on.
  • the electronic device may also include a memory 1602 .
  • the memory 1602 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (random access memory, RAM) or other types that can store information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be programmed by a computer Any other medium accessed, but not limited to.
  • the memory can exist independently, and is connected to the central processing unit through the high-speed serial bus 1604 . Memory can also be integrated with the central processing unit.
  • the memory 1602 is used to store computer-executed instructions for executing the solution of the present application, and the execution is controlled by the central processing unit 1601 .
  • the central processing unit 1601 is used to execute the computer-executed instructions stored in the memory 1602, so as to realize the method for calculating position information in the touch screen provided by the embodiment of the present application.
  • the computer-executed instructions in the embodiment of the present application may also be referred to as application program code, which is not specifically limited in the embodiment of the present application.
  • the central processing unit 1601 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 16 .
  • the electronic device may include multiple central processing units, such as central processing unit 1601 and central processing unit 1605 in FIG. 16 .
  • Each of these central processing units may be a single-core (single-CPU) central processing unit or a multi-core (multi-CPU) central processing unit.
  • a central processing unit herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the touch chip 1606 can periodically transmit a sampling pulse sequence to the touch screen 1607 to collect source data generated by the trigger operation when the touch screen 1607 receives the trigger operation.
  • the source data includes voltage signal data or current signal data of the touch screen 1607 .
  • the touch chip 1606 can transmit voltage signal data or current signal data to the central processing unit 1601 through the high-speed serial bus 1604 .
  • the touch chip 1606 is also integrated with an MCU, wherein the main frequency of the MCU is between 200 MHz and 400 MHz, and the MCU can be used for processing signals such as analog/digital conversion.
  • the touch chip 1606 can transmit voltage signal data or current signal data to the central processing unit 1605 and the central processing unit 1601 through the high-speed serial bus 1604 .
  • the central processing unit 1605 or the central processing unit 1601 calculates the position information of the trigger operation in the touch screen based on the source data.

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Abstract

本申请提供一种触控屏中的位置信息计算方法和电子设备。该触控屏中的位置信息计算方法，由于触控芯片是通过高速串行总线传输触发操作产生的源数据的，可以使得触控芯片传输触发操作产生的源数据的第一时长t1较短。由于计算触发操作在触控屏中的位置信息是在进行的，可以使得CPU计算用户触发触控屏的坐标的第二时长t2也较短。这样一来，在第一时长t1与第二时长t2之和较小的情况下，相当于缩短了从电子设备的触控屏接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3。如此，可以提高用户的使用体验感。

Description

触控屏中的位置信息计算方法和电子设备
本申请要求于2021年09月24日提交中国国家知识产权局、申请号为202111124509.3、申请名称为“触控屏中的位置信息计算方法和电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及终端技术领域，尤其涉及一种触控屏中的位置信息计算方法和电子设备。
背景技术
目前，电子设备已经成为人们工作生活的一部分。电子设备通常包括有触控屏，电子设备可以接收用户对触控屏的触发操作，并根据被触发的位置执行对应的功能。
通常情况下，电子设备可以通过触控芯片采集触控屏的源数据。当触控屏被触发时，则触控芯片上的微处理单元MCU可以基于采集的源数据，计算用户触发触控屏的坐标。进而，中央处理单元CPU可以通过I2C总线读取计算得到的坐标。如此，CPU执行与坐标对应的功能。
可见，上述计算用户触发触控屏的坐标是在触控芯片中的MCU中进行的，而由于MCU的主频在200MHz～400MHz之间，运算速率慢。这样，导致电子设备基于用户的触发操作，执行与触发操作对应的功能的延时较大。
发明内容
本申请提供一种触控屏中的位置信息计算方法和电子设备，可以缩短电子设备基于用户的触发操作，执行与触发操作对应的功能的延时。
第一方面，本申请提供了一种触控屏中的位置信息计算方法，应用于电子设备。电子设备包括触控屏、触控芯片以及中央处理单元CPU。本申请提供的方法包括：在触控屏接收到触发操作时，触控芯片采样触控屏中由触发操作产生的源数据。触控芯片通过高速串行总线，向CPU传输源数据，其中，源数据用于指示触控芯片的电容大小。CPU基于源数据，计算触发操作在触控屏中的位置信息。
本申请实施例提供的触控屏中的位置信息计算方法，由于触控芯片是通过高速串行总线传输触发操作产生的源数据的，而高速串行总线传输速率较高。如此，可以使得触控芯片传输触发操作产生的源数据的第一时长t1较短。进一步地，由于计算触发操作在触控屏中的位置信息是在进行的，而由于CPU的主频较高，使得CPU的运算速率也高。如此，可以使得CPU计算用户触发触控屏的坐标的第二时长t2也较短。如此，可以使得第一时长t1与第二时长t2之和较小。
这样一来，由于从电子设备的触控屏接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能结束的延时t3，包括触控芯片向CPU传输源数据的第一时长t1及CPU计算触发操作在触控屏中的位置信息的第二时长t2之和。如此，在第一时长t1与第二时长t2之和较小的情况下，相当于缩短了从电子设备的触控屏接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3。如此，可以 提高用户的使用体验感。
在一种可能的实施方式中，电子设备还包括总线控制器、直接存储器访问DMA，触控芯片通过高速串行总线，向CPU传输源数据，包括：触控芯片控制CPU唤醒数据传输线程。CPU控制总线控制器对DMA标记标识。其中，标识用于指示DMA被总线控制器占用。总线控制器通过高速串行总线从触控芯片拷贝源数据至DMA。总线控制器控制CPU从DMA提取源数据。
在一种可能的实施方式中，在CPU中预设的用于指示唤醒数据传输线程的优先级高于CPU的其他待处理线程的优先级，在总线控制器中预设的用于指示占用DMA的线程的优先级高于总线控制器的其他待处理线程的优先级。
这样，可以进一步地缩短触控芯片传输触发操作产生的源数据的第一时长t1。进而，进一步地缩短了从电子设备的触控屏接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3。
在一种可能的实施方式中，CPU控制所述总线控制器对所述DMA标记标识后，本申请提供的方法还包括：控制数据传输线程开始休眠。
总线控制器控制CPU从DMA提取源数据，包括：总线控制器控制CPU唤醒数据传输线程；CPU唤醒数据传输线程后，从DMA提取源数据。
这样，CPU还可以在数据传输线程休眠的过程中，处理其他待处理的线程。
在一种可能的实施方式中，触控芯片采样触控屏中由触发操作产生的源数据，包括：触控芯片按照预设的采样周期向触控屏发射采样脉冲序列，以采样触控屏中由触发操作产生的源数据。其中，触控芯片传输第N组采样脉冲序列采样的源数据，与触控芯片发射第N+1组采样脉冲序列同时执行，N为大于1的整数，采样周期小于预设的时长阈值。
假设脉冲序列保持的第四时长为t4，每两组采样脉冲序列之间的第五时长为t5。其中，第五时长t5等于采样周期T1与脉冲序列保持的第四时长t4的差值。可以理解地，在预设的采样周期小于预设的时长阈值且脉冲序列保持的第四时长t4不变的情况下，可以使得第五时长t5较短。如此，即使在用户对触控屏的触发操作的时刻在两组采样脉冲序列之间，第N组采样脉冲序列采样到用户对触控屏的触发操作的延时也被缩短。由于第五时长t5为上述的延时t3的一部分，在第五时长t5较短的情况下，这样可以进一步缩短从触控屏接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3。
在一种可能的实施方式中，预设的时长阈值小于或等于2.5ms。
在一种可能的实施方式中，触控芯片采样触控屏中由触发操作产生的源数据，包括：触控芯片按照预设的采样周期向触控屏发射采样脉冲序列，以采样触控屏中由触发操作产生的源数据。其中，采样脉冲序列中的采样脉冲的数量小于30。
当采样脉冲序列中的采样脉冲的数量小于30时，可以使得脉冲序列保持的第四时长t4较短(即进一步地缩短了采样的时长)。在第四时长t4较短的情况下，可以进一步地缩短从触控屏接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3(即缩短了采样延时)。
在一种可能的实施方式中，采样脉冲的采样电压大于3V。
这样，可以提高采样的源数据的可靠性。
在一种可能的实施方式中，本申请提供的方法还包括：CPU利用滤波算法对得到的源数据滤波。
这样，可以提高源数据的可靠性。
在一种可能的实施方式中，高速串行总线为串行外设接口SPI总线。
在SPI总线处于高速模式时，数据传输速率能够达到20Mbps。可见，SPI总线传输数据的速率较高。进而，可以使得上述的CPU从触控芯片读取源数据或者触控芯片向CPU写入源数据的第一时长t1较短。
在一种可能的实施方式中，在CPU基于源数据，计算触发操作在触控屏中的位置信息之后，本申请提供的方法还包括：CPU将位置信息透传到第三方应用，使得第三方应用执行位置信息处的控件对应的功能。
第二方面，本申请还提供的一种电子设备，包括触控屏、触控芯片以及中央处理单元CPU，在触控屏接收到触发操作时，电子设备执行如本申请第一方面提供的触控屏中的位置信息计算方法。
应当理解的是，本申请的第二方面本申请的第一方面的技术方案相对应，各方面及对应的可行实施方式所取得的有益效果相似，不再赘述。
附图说明
图1为
Figure PCTCN2022118546-appb-000001
界面向上滑动后，视频控件401被触发播放视频的界面示意图；
图2为电子设备的触控屏被触发时，执行位置信息处的控件对应的功能的架构示意图；
图3为本申请实施例提供的电子设备的硬件架构示意图；
图4为本申请实施例提供的电子设备的软件架构示意图；
图5为本申请实施例提供的电子设备的触控屏被触发时，执行位置信息处的控件对应的功能的架构示意图；
图6为本申请实施例提供的触控屏中的位置信息计算方法的流程图；
图7为本申请实施例提供的计算位置信息的流程框图；
图8为本申请实施例提供的触控芯片基于预设的采样周期发射采样脉冲序列的示意图之一；
图9为本申请实施例提供的触控芯片基于预设的采样周期发射采样脉冲序列的示意图之二；
图10为本申请实施例提供的数据传输的调度方式的架构示意图；
图11为本申请实施例提供的触控屏被多指触发的界面示意图；
图12为触控屏被多指触发相对于被单指触发时，计算位置信息的时长的示意图之一；
图13为触控屏被多指触发相对于被单指触发时，计算位置信息的时长的示意图之二；
图14为本申请实施例提供的采用脉冲序列中的采样脉冲数量小于30个时，发射采样脉冲序列的示意图；
图15为本申请实施例提供的位置信息计算方法的框图；
图16为本申请实施例提供的一种电子设备的硬件结构示意图。
具体实施方式
为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。例如，第一值和第二值仅仅是为了区分不同的值，并不对其先后顺序进行限定。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
需要说明的是，本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
目前，电子设备已经成为人们工作生活的一部分。电子设备通常包括有触控屏，电子设备可以接收用户对触控屏的触发操作，并根据被触发的位置执行相应的功能。可以理解地，电子设备基于用户的触发操作，执行与触发操作对应的功能的延时包括：触控芯片向CPU传输数据的第一时长t1和计算位置信息的第二时长t2。
例如，当电子设备的触控屏在显示图1中的a所示的
Figure PCTCN2022118546-appb-000002
界面中，接收到用户向上滑动的触摸操作时，触控屏的界面显示的内容发生变化，变为图1中的b所示的界面。当用户在图1中的b所示的界面中触发视频控件401时，如图2所示，电子设备的触控芯片通过3V的采样脉冲序列，采样触控屏中由触发操作产生的源数据。进而，电子设备的触控芯片的MCU基于源数据，计算触发操作在触控屏中的位置信息。由于由于触控芯片的MCU的主频较低，运算速率慢。如此，会导致计算触发操作在触控屏中的位置信息的第二时长t2较长。例如，第二时长t2为4ms。如此，触控芯片通过I2C总线传输位置信息到电子设备的CPU，其中，触控芯片传输位置信息的第一时长为t1(例如，第一时长t1可以为0.2ms)。进而，CPU根据位置信息控制触控屏切换到图1中的c所示的界面以播放视频。
由于计算触发操作在触控屏中的位置信息的第二时长t2较长，这样一来，会导致第二时长t2与第一时长t1之和较大。例如，第二时长t2与第一时长t1之和可能是4.2ms。如此，最终会导致CPU根据位置信息控制触控屏切换到图1中的c所示的界面延时较长。
有鉴于此，本申请提供了一种触控屏中的位置信息计算方法，电子设备的触控芯 片采样触控屏中由触发操作产生的源数据；电子设备的触控芯片通过串行外设接口高速串行总线，向CPU传输源数据。其中，源数据用于指示触控芯片的电容大小。电子设备的CPU基于源数据，计算触发操作在触控屏中的位置信息。由于触控芯片是通过高速串行总线传输触发操作产生的源数据的，而由于高速串行总线在高速模式下的传输速率大于预设的速率阈值。如此，可以使得触控芯片传输触发操作产生的源数据的第一时长t1较短。进一步地，由于计算触发操作在触控屏中的位置信息是在CPU中进行的，而由于CPU的主频较高，使得CPU的运算速率也高。如此，可以使得CPU计算用户触发触控屏的位置的第二时长t2也较短。进而，第一时长t1与第二时长t2之和也较小。这样一来，缩短了电子设备基于用户的触发操作，执行与触发操作对应的功能的延时。
可以理解的是，上述电子设备可以是终端，(terminal)、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。终端设备可以是手机(mobile phone)、智能电视、穿戴式设备、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self-driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对电子设备所采用的具体技术和具体设备形态不做限定。
为了能够更好地理解本申请实施例，下面对本申请实施例的电子设备的结构进行介绍。示例性的，图3为本申请实施例提供的一种电子设备的结构示意图。
为了能够更好地理解本申请实施例，下面对本申请实施例的电子设备的结构进行介绍。图3为本申请实施例适用的电子设备的一种结构示意图。如图3所示，该电子设备可以包括：中央处理单元(central processing unit，CPU)110，外部存储器接口120，内部存储器121，通用串行总线(universal serial bus，USB)接口130，串行外设接口(serial peripheral interface，SPI)总线131，充电管理模块140，电源管理模块141，电池142，天线1，天线2，移动通信模块150，无线通信模块160，音频模块170，扬声器170A，受话器170B，麦克风170C，耳机接口170D，传感器180，按键190，马达191，摄像头193，触控屏194，以及用户标识模块(subscriber identification module，SIM)卡接口195，触控芯片196等。可以理解的是，本实施例示意的结构并不构成对电子设备的具体限定。在本申请另一些实施例中，电子设备可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。
中央处理单元110可以是电子设备的神经中枢和指挥中心。处理器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。中央处理单元110中还可以设置存储器，用于存储指令和数据。在一些实施例中，中央处理单元110中的存储器为高速缓冲存储器。该存储器可以保存中央处理单元110用过或循环使用的指令或数据。如果中央处理单元110需要再次使用该指令或数据，可从存储器中直接调用。这就避免了重复存取，减少了中央处理单元110的等待时间，因而提高了电子设备的效率。
在一些实施例中，中央处理单元110可以包括一个或多个接口。接口可以包括集成电路内置音频(inter-integrated circuit sound，I2S)接口，脉冲编码调制(pulse code modulation，PCM)接口，通用异步收发传输器(universal asynchronous receiver/transmitter，UART)接口，移动产业处理器接口(mobile industry processor interface，MIPI)，通用输入输出(general-purpose input/output，GPIO)接口，用户标识模块(subscriber identity module，SIM)接口，和/或通用串行总线(universal serial bus，USB)接口，以及SPI接口等。可以理解的是，本申请实施例示意的各模块间的接口连接关系为示意性说明，并不构成对电子设备的结构限定。在本申请另一些实施例中，电子设备也可以采用上述实施例中不同的接口连接方式，或多种接口连接方式的组合。
电子设备的无线通信功能可以通过天线1，天线2，移动通信模块150，无线通信模块160，调制解调处理器以及基带处理器等实现。天线1和天线2用于发射和接收电磁波信号。电子设备中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
无线通信模块160可以提供应用在电子设备上的包括无线局域网(wireless local area networks，WLAN)，蓝牙，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，NFC，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块160经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到中央处理单元110。无线通信模块160还可以从中央处理单元110接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。
电子设备通过GPU，触控屏194，以及应用处理器等可以实现显示功能。应用处理器可以包括NPU、DPU。GPU为图像处理的微处理器，连接触控屏194和应用处理器。GPU用于执行数学和几何计算，用于图形渲染。中央处理单元110可包括一个或多个GPU，其执行指令以生成或改变显示信息。NPU为神经网络(neural-network，NN)计算处理器，通过借鉴生物神经网络结构。DPU也称为显示子系统(Display Sub-System，DSS)，DPU用于对触控屏194的色彩进行调整，DPU可以通过三维查找表(3D look up table，3D LUT)对触控屏的色彩进行调整。
触控屏194用于显示图像，视频等。触控屏194包括显示面板。显示面板可以采用液晶触控屏(liquid crystal display，LCD)，有机发光二极管(organic light-emitting diode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting diode的，AMOLED)，柔性发光二极管(flex light-emitting diode，FLED)，Miniled，MicroLed，Micro-oLed，量子点发光二极管(quantum dot light emitting diodes，QLED)等。在一些实施例中，电子设备可以包括1个或N个触控屏194，N为大于1的正整数。当触控屏194被触发时，触控屏194的电容会发生变化，且当触控屏194的不同位置触发时，触控屏194的电容发生的变化不同。
触控芯片196可以周期性的向触控屏194发射采样脉冲序列，以采集触控屏194产生的源数据。其中，源数据包括触控屏194的电压信号数据或电流信号数据。触控芯片196可以通过SPI总线131向中央处理单元110传输电压信号数据或电流信号数据。另外，触控芯片196中还集成有MCU，其中，MCU的主频在200MHz～400MHz 之间，MCU可以用于对信号进行模/数转换等处理。
触控芯片196可以通过SPI总线向中央处理单元110传输电压信号数据或电流信号数据。其中，SPI总线131是一种高速的，全双工，同步的通信总线，并且在芯片的管脚上只占用四根线，节约了芯片的管脚，节省了空间。
电子设备可以通过ISP，一个或多个摄像头193，视频编解码器，GPU，一个或多个触控屏194以及应用处理器等实现拍摄功能。
外部存储器接口120可以用于连接外部存储卡，例如Micro SD卡，实现扩展电子设备的存储能力。外部存储卡通过外部存储器接口120与中央处理单元110通信，实现数据存储功能。
内部存储器121可以用于存储一个或多个计算机程序，该一个或多个计算机程序包括指令。中央处理单元110可以通过运行存储在内部存储器121的上述指令，从而使得电子设备执行各种功能应用以及数据处理等。内部存储器121可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统；该存储程序区还可以存储一个或多个应用程序(比如图库、联系人等)等。存储数据区可存储电子设备使用过程中所创建的数据(比如照片，联系人等)等。
电子设备可以通过音频模块170，扬声器170A，受话器170B，麦克风170C，以及应用中央处理单元等实现音频功能。例如音乐播放，录音等。
音频模块170用于将数字音频信息转换成模拟音频信号输出，也用于将模拟音频输入转换为数字音频信号。扬声器170A，也称“喇叭”，用于将音频电信号转换为声音信号。电子设备可以通过扬声器170A收听音乐，或收听免提通话。收话器170B，用于将音频电信号转换成声音信号。当电子设备接听电话或语音信息时，可以通过将收话器170B靠近人耳接听语音。麦克风170C，用于将声音信号转换为电信号。
压力传感器180A用于感受压力信号，可以将压力信号转换成电信号。在一些实施例中，压力传感器180A可以设置于触控屏194。陀螺仪传感器180B可以用于确定电子设备的运动姿态。气压传感器180C用于测量气压。磁传感器180D包括霍尔传感器。加速率传感器180E可检测电子设备在各个方向上(一般为三轴)加速率的大小。距离传感器180F，用于测量距离。接近光传感器180G可以包括例如发光二极管(LED)和光检测器，例如光电二极管。环境光传感器180L用于感知环境光亮度。指纹传感器180H用于采集指纹。温度传感器180J用于检测温度。触控传感器180K，也称“触控器件”。触控传感器180K可以设置于触控屏194，由触控传感器180K与触控屏194组成触控屏，也称“触控屏”。骨传导传感器180M可以获取振动信号。
按键190包括开机键，音量键等。按键190可以是机械按键。也可以是触控式按键。电子设备可以接收按键输入，产生与电子设备的用户设置以及功能控制有关的键信号输入。指示器192可以是指示灯，可以用于指示充电状态，电量变化等。
电子设备的软件系统可以采用分层架构，事件驱动架构，微核架构，微服务架构，或云架构。本申请实施例以分层架构的Android系统为例，示例性说明电子设备的软件结构。图4为本申请实施例适用的电子设备的一种软件结构框图。分层架构将电子设备的软件系统分成若干个层，每一层都有清晰的角色和分工。层与层之间通过软件接口通信。在一些实施例中，可以将Android系统分为五层，分别为应用程序层 (applications)、应用程序框架层(application framework)、安卓运行时(Android runtime)和系统库、硬件抽象层(hardware abstract layer，HAL)以及内核层(kernel)。
应用程序层可以包括一系列应用程序包，应用程序层通过调用应用程序框架层所提供的应用程序接口(application programming interface，API)运行应用程序。如图3所示，应用程序包可以包括微信，相机，图库，日历，通话，地图，导航，WLAN，蓝牙，音乐，视频，短信等应用程序。
应用程序框架层为应用程序层的应用程序提供API和编程框架。应用程序框架层包括一些预先定义的函数。如图4所示，应用程序框架层可以包括窗口管理器，内容提供器，视图系统，电话管理器，资源管理器，通知管理器等。
安卓运行时包括核心库和虚拟机。安卓运行时负责安卓系统的调度和管理。核心库包含两部分：一部分是java语言需要调用的功能函数，另一部分是安卓的核心库。应用程序层和应用程序框架层运行在虚拟机中。虚拟机将应用程序层和应用程序框架层的java文件执行为二进制文件。虚拟机用于执行对象生命周期的管理，堆栈管理，线程管理，安全和异常的管理，以及垃圾回收等功能。系统库可以包括多个功能模块。
硬件抽象层，可以包含多个库模块，库模块如可以为摄像头库模块、马达库模块等。Android系统可以为设备硬件加载相应的库模块，进而实现应用程序框架层访问设备硬件的目的。
内核层是硬件和软件之间的层。内核层用于驱动硬件，使得硬件工作。内核层至少包含显示驱动，摄像头驱动，音频驱动，传感器驱动，马达驱动等，本申请实施例对此不做限制。
下面以具体地实施例对本申请的技术方案以及本申请的技术方案如何解决上述技术问题进行详细说明。下面这几个具体的实施例可以独立实现，也可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
下面，以电子设备为手机100、高速串行总线为SPI总线131为例，对本申请实施例提供的触控屏中的位置信息计算方法进行说明，该示例并不构成对本申请实施例的限定。下述实施例可以相互结合，对于相同或相似的概念或过程不再赘述。其中，如图5所示，手机100包括触控屏194、触控芯片196、SPI总线131以及CPU110。触控屏194与触控芯片196电连接，CPU110与触控芯片196通过SPI总线131通信连接。图6为本申请实施例提供的触控屏中的位置信息计算方法的流程示意图。如图6所示，本申请实施例提供的触控屏中的位置信息计算方法包括：
S601：手机100的触控屏194显示第一界面。
示例性地，仍如图1中的(b)所示，在本申请实施例中，第一界面可以为
Figure PCTCN2022118546-appb-000003
的朋友圈界面。
Figure PCTCN2022118546-appb-000004
的朋友圈界面包括视频控件101。
另外，第一界面还可以是相机应用的拍照预览界面、游戏应用的界面、以及系统桌面等等，在此不作限定。
需要说明的是，触控屏194还可以处于熄灭状态。可以理解地，当触控屏194处于熄灭状态时，上述的S601可以忽略。
S602：手机100的触控屏194在接收到触发操作时，手机100触控芯片196采样触控屏194中由触发操作产生的源数据。
触控芯片196可以向触控屏194周期性的发射采样脉冲序列，以采集触控屏194产生的源数据，其中，源数据为触控屏194的电压信号或电流信号。可以理解地，源数据可以用于指示触控芯片的电容大小。
示例性地，基于上述的图1对应的实施例中，当手机100的触控屏194显示微信
Figure PCTCN2022118546-appb-000005
的朋友圈界面时，触控芯片196发射的采样脉冲序列可以采样触控屏194显示
Figure PCTCN2022118546-appb-000006
的朋友圈界面时，产生的源数据。当
Figure PCTCN2022118546-appb-000007
的朋友圈界面中的视频控件101被用户的手指触发时，触控芯片196发射的采样脉冲序列可以采样触控屏194中由触发操作产生的源数据。可以理解地，当触控屏194被触发时，触控芯片196采样得到的源数据，相对于触控屏194未被触发时采样得到的源数据不同。
S603：手机100的触控芯片196通过串行外设接口SPI总线131，向CPU110传输源数据。
其中，S603的具体实现包括但不限于以下两种方式：
第一种：CPU110通过SPI总线131从触控芯片196读取采样得到的源数据。具体地，S602中的采样脉冲序列包括多个采样脉冲，每个采样脉冲均会采样到触控屏194产生的一个子数据。触控芯片196在采样结束后，将采样得到的多个子数据进行处理打包成源数据。CPU110通过SPI总线131读取源数据。
第二种：触控芯片196通过SPI总线131向CPU110写入采样得到的源数据。具体地，S602中的采样脉冲序列包括多个采样脉冲，每个采样脉冲均会采样到触控屏194产生的一个子数据。触控芯片196在采样结束后，将采样得到的多个子数据进行处理打包成源数据。触控芯片196通过SPI总线131将源数据写入CPU110。
通常地，SPI总线131处于高速模式时，数据传输速率能够达到20Mbps。可见，SPI总线131传输数据的速率较高。进而，可以使得上述的CPU110从触控芯片196读取源数据或者触控芯片196向CPU110写入源数据的第一时长t1较短。通常地，第一时长t1小于1.5ms。
可以理解地，上述的触控芯片196采样得到的源数据为模拟信号，触控芯片196在向CPU110传输源数据之前，需要将模拟信号转换为数字信号，对数字信号进行格式处理，以便CPU110能够识别。
S604：手机100的CPU110基于源数据，计算触发操作在触控屏中的位置信息。
示例性地，如图7所示，手机100检测数据形式为数字信号的源数据的变化量(如电流信号变化量或电压信号的变化量)，以初步确定被用户的手指触发产生的信号。手机100对初步确定的被用户触发产生的信号进行区域分割，得到各个区域对应的子信号。手机100分别进一步校验各个区域对应的子信号是否为被用户的手指触发产生的信号，如果是，则手机100根据每个子区域中的信号分布，确定子区域被用户的手指触发时的质心坐标(即图1对应的实施例中的
Figure PCTCN2022118546-appb-000008
的朋友圈界面的视频控件101被触发的坐标)。可以理解地，质心坐标即计算得到的位置信息。另外，手机100还可以对位于触控屏194的手指进行位置追踪，以便确定手指在触控屏194的运动轨迹。
可见，上述计算触发操作在触控屏中的位置信息的过程比较复杂，而CPU110的主频通常大于1.5GZ。可以理解地，当CPU110的主频越高时，CPU110的时钟频率也越高，即CPU110的运算能力越强，计算触发操作在触控屏中的位置信息的速率也越 快。进而CPU110计算触发操作在触控屏中的位置信息的第二时长t2也较短。通常地，第二时长t2小于1ms。
S605：手机100的CPU110将位置信息透传到第一界面101对应的第三方应用，使得第三方应用执行位置信息处的控件对应的功能。
示例性地，在图1对应的实施例的基础上，可以理解地，第一界面101对应的第三方应用为
Figure PCTCN2022118546-appb-000009
手机100的CPU110控制
Figure PCTCN2022118546-appb-000010
切换为图1中c的界面以播放视频。其中，控制
Figure PCTCN2022118546-appb-000011
切换为图1中c的界面以播放视频，即位置信息处的控件(即视频控件101)对应的功能。需要说明的是，在触控屏中的位置信息计算方法中，S605可以省略。
基于上述的S601-S605，可以理解地，从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能结束的延时t3，包括触控芯片196向CPU110传输源数据的第一时长t1及CPU110计算触发操作在触控屏中的位置信息的第二时长t2之和。
基于上述，本申请实施例提供的触控屏中的位置信息计算方法，由于触控芯片196是通过SPI总线131传输触发操作产生的源数据的，而SPI总线131传输速率较高。如此，可以使得触控芯片196传输触发操作产生的源数据的第一时长t1较短。进一步地，由于计算触发操作在触控屏中的位置信息是在进行的，而由于CPU110的主频较高，使得CPU110的运算速率也高。如此，可以使得CPU110计算用户触发触控屏194的坐标的第二时长t2也较短。如此，可以使得第一时长t1与第二时长t2之和较小。
这样一来，由于从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能结束的延时t3，包括触控芯片196向CPU110传输源数据的第一时长t1及CPU110计算触发操作在触控屏中的位置信息的第二时长t2之和。如此，在第一时长t1与第二时长t2之和较小的情况下，相当于缩短了从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3。如此，可以提高用户的使用体验感。
可以理解地，在上述实施例中，是以如何缩短第一时长t1与第二时长t2之和为例说明，如何缩短从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3的。下面结合图8，说明如何在缩短第一时长t1与第二时长t2之和的基础上，再缩短采样周期T1，以进一步地缩短从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3。
如图8所示，上述的触控芯片196可以每隔预设的采样周期T1向触控屏194发射采样脉冲序列801。触控芯片196预设的向CPU110传输第N组采样脉冲序列801采样的源数据的起始时刻S1可以为：触控芯片196向触控屏194发射第N+1组采样脉冲序列801的起始时刻。其中，N为大于1的整数。如此，仍如图8所示，在预设采样周期T1大于第一时长t1与第二时长t2之和的情况下，可以使得触控芯片196向触控屏194发射第N+1组采样脉冲序列801，与触控芯片196通过SPI总线131向CPU110传输源数据以及CPU110计算位置信息并行处理，以作为缩短采样周期T1的前提。
基于上述，由于第一时长t1与第二时长t2之和较小，手机100预设的采样周期 T1可以小于预设的时长阈值。示例性地，如图9所示，由于第一时长t1(小于1.5ms)与第二时长t2(小于1ms)之和较小，预设的采样周期T1也可以较小。如在第一时长t1与第二时长t2之和小于2.5ms时，采样周期T1也可以预设为小于2.5ms(即触控芯片196的采样率大于400HZ)。另外，采样周期T1也可以预设为2.5ms。
从图8中可以看出，脉冲序列保持的第四时长为t4，每两组采样脉冲序列801之间的第五时长为t5。其中，第五时长t5等于采样周期T1与脉冲序列保持的第四时长t4的差值。可以理解地，在手机100预设的采样周期T1小于预设的时长阈值且脉冲序列保持的第四时长t4不变的情况下，可以使得第五时长t5较短。如此，即使在用户对触控屏194的触发操作的时刻在两组采样脉冲序列801之间，第N组采样脉冲序列801采样到用户对触控屏194的触发操作的延时也被缩短。另外，从图8中可以看出，第五时长t5为上述的延时t3的一部分，在第五时长t5较短的情况下，这样可以缩短从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3，进一步地提升了用户的体验感。
综上，对图8对应的实施例所述，当第一时长t1与第二时长t2(小于1ms)之和越小时，手机100预设的采样周期T1也可以越小，这样可以使得每两组采样脉冲序列之间的第五时长t5越小。进而，可以使得从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3也越小。
另外，在上述的S602中，是依靠SPI总线131的性能，缩短触控芯片196向CPU110传输源数据的第一时长t1。在另一些实施例中，还可以基于数据传输的调度方式，进一步地缩短触控芯片196向CPU110传输源数据的第一时长t1。
示例性地，如图10所示，手机100还可以包括SPI控制器1001，其中，SPI总线131、SPI控制器1001以及CPU110依次通信连接。SPI控制器1001与CPU110可以集成于手机100内的系统级芯片1002(system on a Chip，SOC)。另外，SPI控制器1001还连接有DMA(Direct Memory Access，直接存储器访问)1003，DMA1003可以在SPI控制器1001和触控芯片196之间进行数据传输，在传输过程中不需要CPU110的参与。另外，在CPU110中预设的用于指示唤醒数据传输线程的优先级高于CPU110的其他待处理线程的优先级，在SPI控制器1001中预设的用于指示占用DMA1003的线程的优先级高于SPI控制器1001的其他待处理线程的优先级。
具体地，数据传输的调度方式包括如下步骤：Step1：触控芯片196向触控屏194发射采样脉冲序列以采样源数据。Step2：当触控芯片196在传输数据之前，可以将采样得到模拟信号转换数字信号，并将数字信号打包得到源数据。其中，源数据的大小通常在2kb-4kb之间。Step3：触控芯片196在打包完毕后向CPU110发送第一通知(第一通知即图10中的中断信号)，第一通知用于指示CPU110唤醒数据传输线程。由于CPU110中预设的数据传输线程的用于指示优先级高于CPU110的其他待处理线程的优先级，则CPU110确定数据传输线程的优先级高于CPU110中其他待处理的线程，则CPU110无需等待其他待处理的线程处理完毕，即可唤醒数据传输线程，使得触控芯片196唤醒CPU110的数据传输线程的时长较小。Step4：CPU110唤醒数据传输线程后，向SPI控制器1001发送第二通知，其中，第二通知用于指示SPI控制器1001占用DMA1003。Step5：CPU110向SPI控制器1001发送第二通知后，控制数据传输 线程开始休眠。如此，CPU110在数据传输线程休眠的过程中，还可以处理其他的待处理线程。
SPI控制器1001接收到第二通知后，对DMA标记标识，其中，标识用于指示DMA被SPI控制器1001占用。由于SPI控制器1001中预设的用于指示占用DMA1003的线程的优先级的标识高于优先级阈值，则确定占用DMA1003的线程的优先级高于SPI控制器1001中其他待处理的线程，则SPI控制器1001无需等待其他待处理的线程处理完毕，即占用DMA1003，使得占用DMA1003的时长也较小。进而，Step6：SPI控制器1001通过SPI总线131从触控芯片196开始拷贝源数据，并将拷贝的源数据暂存到DMA1003。Step7：在拷贝完毕后，SPI控制器1001向CPU110发送第三通知，第三通知用于指示CPU110提取源数据。由于CPU110中用于指示预设的数据传输线程的优先级高于SPI控制器1001的其他待处理线程的优先级，则CPU110确定数据传输线程的优先级高于CPU110中其他待处理的线程，则CPU110无需等待其他待处理的线程处理完毕，即可唤醒数据传输线程，又使得唤醒数据传输线程的时长较小。Step8：CPU110的数据传输线程被唤醒以后，从DMA1003提取拷贝的源数据。进而，实现了触控芯片196通过SPI总线131向CPU110传输源数据。
可见，在图10对应的实施例中，由于唤醒CPU110的数据传输线程的时长较小、占用DMA1003的时长也较小。如此，可以提高触控芯片196向CPU110传输源数据的速率，缩短触控芯片196向CPU110传输源数据的第一时长t1。这样，可以进一步缩短第一时长t1与第二时长t2之和。可以理解地，基于与上述的图8对应的实施例同样的原理，当第一时长t1与第二时长t2之和进一步较小时，采样周期T1也可以进一步较小，如此可以进一步地缩短从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3。
需要说明的是，在上述的实施例中，是以触控屏194被用户单指触发时为例，说明如何使得采样周期T1较小的。下面结合图11-图13说明，当触控屏194被用户多指触发时如何使得采样周期T1较小的。
如图11中的(a)所示，触控屏194显示的第一界面为游戏应用的界面。游戏应用的界面中包括控件A、控件B、控件C、以及控件D。游戏界面中还包括游戏角色P1和游戏角色P2。当用户想要控制游戏角色P1重手攻击游戏角色P2时，如图11中的(b)所示，可以同时触发控件A、控件B、以及控件C。进而，触控芯片196采样到触控屏194被触发控件A、控件B、以及控件C时的源数据。可以理解地，当触控屏194被用户越多的手指触发时，触控芯片196采样到的源数据较多。触控芯片196将采样到的源数据通过SPI总线131传输到CPU110。手机100的CPU110基于源数据，计算触发操作在触控屏中的位置信息。可以理解地，CPU110基于源数据计算得到的位置信息包括用户的手指触发控件A的坐标、用户的手指触发控件B的坐标以及用户的手指触发控件C的坐标。进而，CPU110基于控件A的坐标、控件B的坐标以及控件C的坐标，控制游戏角色P1重手攻击游戏角色P2。
经发明人试验，在现有技术的方案中，如图12中的(a)所示，由于触控芯片196的MCU的主频较低，当需要处理的源数据越多时，MCU计算触发操作在触控屏中的位置信息的第二时长t2也更长。进而，在第二时长t2也越长时，会导致第一时长t1 与第二时长t2之和也更长。这样一来，会导致采样周期T1也较长。如此，会使得用户从触发控件A、控件B、以及控件C，到控制游戏角色P1重手攻击游戏角色P2的延时t3更长。
而在本申请实施例中，如图12中的(b)所示，由于计算触发操作在触控屏中的位置信息是在CPU110进行的。而CPU110的主频较大，如此，当需要处理的源数据越多时，CPU110计算触发操作在触控屏中的位置信息的第二时长t2，也不会发生变化。如此，在本申请实施例中，第一时长t1与第二时长t2之和不会因为触控屏194被用户的手指增加而延长。这样，可以使得触控屏194被用户越多的手指触发时，采样周期T1也仍然可以保持较小。如此，会使得用户从触发控件A、控件B、以及控件C，到控制游戏角色P1重手攻击游戏角色P2的延时t3仍然保持较小。
在另一些实施例中，触控屏194还可能被用户的4根手指、5根手指以及6根手指等手指数量触发。如图13所示，在现有技术的方案中，当触控屏194被用户分别使用1根手指到10根手指触发时，采样周期T1需要从2.7ms逐渐增长到8ms。而本申请实施例中，当触控屏194被用户使用1根手指到10根手指触发时，采样周期T1可以保持2.5ms不变。基于上述，由于采样周期T1越小，可以使得从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3也越小。可以理解地，从图13可以看出，当触控屏194被用户触发的手指的数量小于6的情况下，触控屏194被用户触发的手指越多，本申请实施例相对于现有技术方案延时t3被缩短的效果越明显。
可以理解地，在上述的实施例中，是以在缩短第一时长t1与第二时长t2之和的基础上缩短采样周期T1为例，说明如何进一步地缩短从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3的。下面，以在缩短第一时长t1与第二时长t2之和的基础上，进一步缩短采样脉冲序列中的采样脉冲的数量为例，说明如何进一步地缩短从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3的。
在另一实施例中，如图14所示，手机100的触控芯片196发射的采样脉冲序列801中的采样脉冲的数量可以小于预设的数量阈值。如，采样脉冲的数量可以小于30个。进一步地，采样脉冲的数量可以为18个、21个、以及24个等，在此不作限定。当采样脉冲序列801中的采样脉冲的数量小于预设的数量阈值时，可以使得脉冲序列保持的第四时长t4较短(即进一步地缩短了采样的时长)。另外，从图14中可以看出，第四时长t4为上述的延时t3的一部分。在第四时长t4较短的情况下，可以进一步地缩短从手机100的触控屏194接收到触发操作开始，到第三方应用执行位置信息处的控件对应的功能的延时t3(即缩短了采样延时)，进一步地提升了用户的体验感。
进一步地，在图14对应的实施例的基础上，为了提高采样脉冲序列801采集的源数据的可靠性，手机100的触控芯片196发射的采样脉冲序列801中的采样脉冲的采样电压可以大于预设的电压阈值。示例地，采样脉冲的电压可以大于3V。如，采样脉冲的电压可以为4V、5V、6V、或者7V等，在此不作限定。可以理解地，当采样脉冲的电压越大时，采样脉冲序列801采集的源数据的可靠性越高。
另外，为了提高CPU110计算得到的位置信息的可靠性，如图15所示，CPU110 在得到触控芯片196采样的源数据之后，需要利用滤波算法对得到的源数据滤波，以降低采集到的源数据中的噪声。进而，CPU110再根据滤波后的源数据，计算得到的位置信息的可靠性更高。
另外，上述的介绍本申请实施例提供的触控屏中的位置信息计算方法中，提到的触发操作可以包括：点击操作、长按操作、以及手势触发操作等，在此不做限定。
示例性的，图16为本申请实施例提供的一种电子设备的硬件结构示意图，如图16所示，该电子设备包括中央处理单元1601，高速串行总线1604、至少一个通信接口(图16中示例性的以通信接口1603为例进行说明)、触控芯片1606、以及触控屏1607。
中央处理单元1601可以是一个通用中央中央处理单元(central processing unit，CPU)，微中央处理单元，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
高速串行总线1604可包括在上述组件之间传送信息的电路。高速串行总线1604处于高速模式时，数据传输速率能够达到20Mbps。可见，高速串行总线1604传输数据的速率较高。其中，高速串行总线1604可以为SPI总线。
通信接口1603，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线局域网(wireless local area networks，WLAN)等。
可能的，该电子设备还可以包括存储器1602。
存储器1602可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过高速串行总线1604与中央处理单元相连接。存储器也可以和中央处理单元集成在一起。
其中，存储器1602用于存储执行本申请方案的计算机执行指令，并由中央处理单元1601来控制执行。中央处理单元1601用于执行存储器1602中存储的计算机执行指令，从而实现本申请实施例所提供的触控屏中的位置信息计算方法。
可能的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，中央处理单元1601可以包括一个或多个CPU，例如图16中的CPU0和CPU1。
在具体实现中，作为一种实施例，电子设备可以包括多个中央处理单元，例如图16中的中央处理单元1601和中央处理单元1605。这些中央处理单元中的每一个可以是一个单核(single-CPU)中央处理单元，也可以是一个多核(multi-CPU)中央处理单元。这里的中央处理单元可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
触控芯片1606可以周期性的向触控屏1607发射采样脉冲序列，以采集触控屏1607在接收到触发操作时，由触发操作产生的源数据。其中，源数据包括触控屏1607的电压信号数据或电流信号数据。触控芯片1606可以通过高速串行总线1604向中央处理单元1601传输电压信号数据或电流信号数据。另外，触控芯片1606中还集成有MCU，其中，MCU的主频在200MHz～400MHz之间，MCU可以用于对信号进行模/数转换等处理。
触控芯片1606可以通过高速串行总线1604向中央处理单元1605和中央处理单元1601传输电压信号数据或电流信号数据。
中央处理单元1605或中央处理单元1601基于源数据，计算触发操作在所述触控屏中的位置信息。
上述的组合也应包括在计算机可读介质的范围内。以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (12)

  1. 一种触控屏中的位置信息计算方法，其特征在于，应用于电子设备，所述电子设备包括触控屏、触控芯片以及中央处理单元CPU，所述方法包括：
    在所述触控屏接收到触发操作时，所述触控芯片采样所述触控屏中由所述触发操作产生的源数据；
    所述触控芯片通过高速串行总线，向所述CPU传输所述源数据，其中，所述源数据用于指示所述触控芯片的电容大小；
    所述CPU基于所述源数据，计算所述触发操作在所述触控屏中的位置信息。
  2. 根据权利要求1所述的方法，其特征在于，所述电子设备还包括总线控制器、直接存储器访问DMA，所述触控芯片通过高速串行总线，向所述CPU传输所述源数据，包括：
    所述触控芯片控制所述CPU唤醒数据传输线程；
    所述CPU控制所述总线控制器对所述DMA标记标识，其中，所述标识用于指示所述DMA被所述总线控制器占用；
    所述总线控制器通过所述高速串行总线从所述触控芯片拷贝所述源数据至所述DMA；
    所述总线控制器控制所述CPU从所述DMA提取所述源数据。
  3. 根据权利要求2所述的方法，其特征在于，在所述CPU中预设的用于指示唤醒数据传输线程的优先级高于所述CPU的其他待处理线程的优先级，在所述总线控制器中预设的用于指示占用所述DMA的线程的优先级高于所述总线控制器的其他待处理线程的优先级。
  4. 根据权利要求2所述的方法，其特征在于，所述CPU控制所述总线控制器对所述DMA标记标识后，所述方法还包括：
    控制所述数据传输线程开始休眠；
    所述总线控制器控制所述CPU从所述DMA提取所述源数据，包括：所述总线控制器控制所述CPU唤醒所述数据传输线程；所述CPU唤醒所述数据传输线程后，从所述DMA提取所述源数据。
  5. 根据权利要求1所述的方法，其特征在于，所述触控芯片采样所述触控屏中由所述触发操作产生的源数据，包括：
    所述触控芯片按照预设的采样周期向所述触控屏发射采样脉冲序列，以采样所述触控屏中由所述触发操作产生的所述源数据；
    其中，所述触控芯片传输第N组所述采样脉冲序列采样的所述源数据，与所述触控芯片发射第N+1组所述采样脉冲序列同时执行，其中，N为大于1的整数，所述采样周期小于预设的时长阈值。
  6. 根据权利要求5所述的方法，其特征在于，所述预设的时长阈值小于或等于2.5ms。
  7. 根据权利要求1所述的方法，其特征在于，所述触控芯片采样所述触控屏中由所述触发操作产生的源数据，包括：
    所述触控芯片按照预设的采样周期向所述触控屏发射采样脉冲序列，以采样所述触控屏中由所述触发操作产生的所述源数据；
    其中，所述采样脉冲序列中的采样脉冲的数量小于30。
  8. 根据权利要求7所述的方法，其特征在于，所述采样脉冲的采样电压大于3V。
  9. 根据权利要求7所述的方法，其特征在于，在所述CPU基于所述源数据，计算所述 触发操作在所述触控屏中的位置信息之前，所述方法还包括：
    所述CPU利用滤波算法对得到的所述源数据滤波。
  10. 根据权利要求1-9任一所述的方法，其特征在于，所述高速串行总线为串行外设接口SPI总线。
  11. 根据权利要求1-9任一所述的方法，其特征在于，在所述CPU基于所述源数据，计算所述触发操作在所述触控屏中的位置信息之后，所述方法还包括：
    所述CPU将所述位置信息透传到第三方应用，使得所述第三方应用执行所述位置信息处的控件对应的功能。
  12. 一种电子设备，包括触控屏、触控芯片以及中央处理单元CPU，其特征在于，在所述触控屏接收到触发操作时，所述电子设备执行如权利要求1-11任一所述的方法。
PCT/CN2022/118546 2021-09-24 2022-09-13 触控屏中的位置信息计算方法和电子设备 WO2023045806A1 (zh)

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