CN106502930A - The method and apparatus that GPIO based on windows platforms simulates serial line interface - Google Patents
The method and apparatus that GPIO based on windows platforms simulates serial line interface Download PDFInfo
- Publication number
- CN106502930A CN106502930A CN201610959567.0A CN201610959567A CN106502930A CN 106502930 A CN106502930 A CN 106502930A CN 201610959567 A CN201610959567 A CN 201610959567A CN 106502930 A CN106502930 A CN 106502930A
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- Prior art keywords
- serial line
- line interface
- gpio
- windows
- interface
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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
- G06F13/10—Program control for peripheral devices
- G06F13/105—Program control for peripheral devices where the programme performs an input/output emulation function
-
- 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
- G06F2213/0002—Serial port, e.g. RS232C
Abstract
The present invention discloses the method and apparatus that the GPIO based on windows platforms simulates serial line interface, and wherein method includes step：Obtain the serial line interface instruction of application software；Corresponding level sequential is instructed according to default serial line interface level timing acquisition serial line interface；Windows kernel-driven function access GPIO ports are called according to level sequential.The present invention is by serial line interface instruction to be converted to the level sequential of GPIO and realizes the access to GPIO port on windows kernels, it is achieved thereby that GPIO port simulates serial line interface under windows platforms, achieve the control to serial interface devices, without the control to serial interface devices is realized using external chip, save the cost of chip.Simulation to multiple serial line interfaces can also be realized by software simulation, when multiple serial line interfaces are needed, without the need for multiple external chips, hardware cost is greatlyd save.
Description
Technical field
The present invention relates to computer is by software analog hardware interfacing field, more particularly to it is based on windows platforms
GPIO simulate serial line interface method and apparatus.
Background technology
GPIO is the abbreviation of General Purpose Input Output (universal input/output), or claims bus extension
Device.Serial line interface is the expansion interface using serial communication mode, common are I2C, SPI, UART interface, single bus interface
Deng.Wherein, I2C (Inter-Integrated Circuit) bus is that the twin wire serial that is developed by PHILIPS companies is total
Line, serial bus interface are widely used in connecting microcontroller and its ancillary equipment.SPI(Serial Peripheral
Interface it is) Serial Peripheral Interface (SPI), UART (Universal Asynchronous Receiver/Transmitter) is
Universal asynchronous receiving-transmitting transmitter.
GPIO is common a kind of universal input/output interface in embedded system, with flexible and easily operated spy
Point, is typically used as the control mouth of the relatively simple equipment of some logics, or is used in groups simulating some simple buses,
Realize the extension to system.Embedded platform, such as 51 single-chip microcomputers, Arm Linux systems, commonly used GPIO are simple to simulate
Serial line interface, such as I2C, SPI etc..
Wherein, on 51 single-chip microcomputers, access port or internal memory can be passed through, directly has access to GPIO mouths.
On Arm linux, linux provides the driver of control GPIO, in that context it may be convenient to access GPIO port.
Windows (form) is a set of operating system of MS's research and development, and windows systems are in PC
(PC, personal computer) field takes sizable proportion.As the system mainly faces just-plainfolk,
Personal user does not have the demand for accessing GPIO hardware resources, thus do not provide directly access the driver of GPIO mouths for
Family uses.Under windows systems, common PC supports serial interface devices if desired, is generally external string by the way of
Realizing, this needs to increase hardware cost line interface conversion chip (as USB turns serial chip, UART turns serial chip etc.).
Content of the invention
For this reason, it may be necessary to the GPIO provided based on windows platforms simulates the scheme of serial line interface, windows platforms are solved
The problem of lower expansing serial interface high cost.
For achieving the above object, the method that the GPIO based on windows platforms simulates serial line interface, bag are inventor provided
Include following steps：
Obtain serial line interface instruction；
Serial line interface is obtained according to serial interface protocol and instructs corresponding level sequential；
Windows kernel-driven function access GPIO ports are called according to level sequential.
Further, the acquisition serial line interface instruction step is specially：Obtain what DeviceIOControl functions sent
IO control codes.
Further, also include step after " obtaining serial line interface instruction "：
The height shape that configuration GPIO port is input or output state and input or output level is instructed according to serial line interface
State.
Further, described windows kernel-driven function access GPIO ports are called to include calling according to level sequential
The port operation function that windows DDK are provided.
Further, described windows kernel-driven function access GPIO port steps are called also to wrap according to level sequential
Include：The virtual memory address for obtaining the LPC controller of PC South Bridge chips accesses the corresponding depositor of GPIO port.
Further, the serial line interface includes one of the following：I2C interfaces, SPI interface, UART interface or single total
Line interface.
The present invention also provides the device that the GPIO based on windows platforms simulates serial line interface, including such as lower module：
Serial line interface instruction acquisition module：For obtaining serial line interface instruction；
Level timing acquisition module：For serial line interface being obtained according to serial interface protocol instruct corresponding level sequential；
GPIO port access modules：For calling windows kernel-driven function access GPIO ports according to level sequential.
Further, serial line interface instruction acquisition module is additionally operable to obtain the transmission IO controls of DeviceIOControl functions
Code.
Further, also include GPIO port configuration module：It is defeated for configuring GPIO port according to serial line interface instruction
Enter or output state and input or output level high low state.
Further, GPIO port access modules are additionally operable to the port operation function for calling windows DDK to provide.
Further, GPIO port access modules are additionally operable to the virtual memory ground of the LPC controller for obtaining PC South Bridge chips
Location accesses the corresponding depositor of GPIO port.
Further, the serial line interface includes one of the following：I2C interfaces, SPI interface, UART interface or single total
Line interface.
Be different from prior art, above-mentioned technical proposal by serial line interface instruction is converted to GPIO level sequential and
The access to GPIO port is realized on windows kernels, it is achieved thereby that GPIO port simulation serial interface under windows platforms
Mouthful, it is achieved that the control to serial interface devices, without realizing the control to serial interface devices using external chip
System, saves the cost of chip.Simulation to multiple serial line interfaces can also be realized by software simulation, multiple serials are being needed
When interface, without the need for multiple external chips, hardware cost is greatlyd save.
By the method for the present invention, it is convenient to the serial line interface that GPIO port is extended to needs, so as to realize with respectively
Plant the communication of serial interface devices.
Description of the drawings
Flow charts of the Fig. 1 for the inventive method embodiment；
Structural representations of the Fig. 2 for apparatus of the present invention embodiment.
Description of reference numerals：
200th, the device of serial line interface is simulated,
201st, serial line interface instruction acquisition module,
203rd, level timing acquisition module,
204th, GPIO port configuration module,
205th, GPIO port access modules.
Specific embodiment
By describing the technology contents of technical scheme, structural features in detail, realizing purpose and effect, below in conjunction with concrete reality
Apply example and coordinate accompanying drawing to be explained in detail.
Fig. 1 to Fig. 2 is referred to, the present embodiment provides the method that the GPIO based on windows platforms simulates serial line interface, this
The method of invention is can apply on the equipment equipped with windows systems, and on the such as PC of x86 frameworks, these equipment have GPIO
Port, GPIO port are linked together with the serial line interface of serial interface devices.In an embodiment of the present invention, serial line interface can
To include one of the following：I2C interfaces, SPI interface, UART interface or single bus interface.The present embodiment comprises the steps：
Step S101 obtains serial line interface instruction, and serial line interface instruction here can be sent by application software, can be that application is soft
The instruction communicated with serial interface devices by part.Then enter step S102 to be referred to according to serial interface protocol acquisition serial line interface
Make corresponding level sequential.The corresponding relation that serial interface protocol is level sequential with serial line interface instruction, different serial interface
Mouth instruction has different level sequential.These sequential will be realized according to the standard agreement of serial line interface.Get electricity
At ordinary times after sequence, enter step S103 and windows kernel-driven function access GPIO ports are called according to level sequential.
For the access of GPIO port, under dos operating system, C language provides the function of operation I/O ports.These
Function can call IN and OUT assembly instructions to access I/O ports.Due to the control of authority of windows operating systems, application layer without
Method directly accesses I/O ports.So needing to realize a windows kernel-driven function, connecing for inner nuclear layer I/O ports is realized
Mouth is accessed.In kernel-driven function, it is achieved that the IO control functions of driving.Windows kernel is called in step s 103
Accessing GPIO port, due to being to access GPIO port according to level sequential in step S103, then GPIO will for driving function
Corresponding serial line interface level sequential is produced, the change of this level is consistent with the change of the level of serial interface protocol, then periphery
Serial interface devices will receive serial line interface level sequential, so as to get corresponding serial line interface instruction.Thus complete
Serial line interface instruction is sent by GPIO port into PC equipment and arrives serial interface devices, it is achieved that PC equipment is set with serial line interface
Standby interaction.Changed without external chip, saved the expenditure cost of chip.Simulated by software, it is also possible to
The simulation to multiple serial line interfaces is conveniently realized, so when needing to switch serial line interface, without the need for being changed to hardware, is saved
The expenditure cost of time cost and hardware is saved.
When conducting interviews to GPIO port, in addition it is also necessary to which GPIO port is configured, then the application " is obtaining string
Also include step after line interface instruction "：According to serial line interface instruction configuration GPIO port, configuration here includes that configuration is specified
The transmission direction of GPIO port is the high low state of input or output state and input or output level.Concrete configuration side
Method：The type of the serial line interface that simulates as needed, such as I2C, SPI, the corresponding GPIO port of configuration is input state or defeated
Do well.If being arranged to output state, always according to the type of the serial line interface for needing simulation, such as I2C, SPI, configuration is corresponding
The high low state of the output level of GPIO port.In this application, for the access of GPIO include the reading to GPIO port and
Output, wherein, the reading of GPIO port includes reading the high low state of the level for specifying GPIO port；The output of GPIO port includes
The high low state of the level of GPIO port is specified in configuration.By configuring to GPIO port, facilitate next to GPIO port
Operation.
Specifically, described windows kernel-driven function access GPIO ports are called to include calling according to level sequential
The port operation function that windows DDK are provided.Following DDK function is mainly called：
The function that DDK is provided can conveniently realize the access to GPIO port, reduce the complexity of GPIO port access
Degree.
Further, obtaining serial line interface instruction step includes obtaining DeviceIOControl (equipment interface control) letter
Number sends IO control codes.Application software sends IO control codes by calling DeviceIOControl, calls the IO in kernel function
Control function, so that realize that indirectly application layer I/O port accesses.
Further, described windows kernel-driven function access GPIO port also step bag is called according to level sequential
Include：The virtual memory address for obtaining LPC (the Low Pin Count) controller of PC South Bridge chips accesses that GPIO port is corresponding posts
Storage.Application software is accessed by I/O ports, obtains the virtual memory base address of the LPC controller of PC South Bridge chips.Due to
The virtual address of GPIO port also within the scope of the virtual memory base address of LPC controller, therefore, it is possible to utilize LPC controller
Virtual address access the corresponding depositor of GPIO port, so as to realize the access to GPIO port.
The present invention also provides the device 200 that the GPIO based on windows platforms simulates serial line interface, as shown in Fig. 2 including
Such as lower module：Serial line interface instruction acquisition module 201：For obtaining serial line interface instruction；Level timing acquisition module 203：With
In serial line interface being obtained according to serial interface protocol instruct corresponding level sequential；GPIO port access modules 205：For basis
Level sequential calls windows kernel-driven function access GPIO ports.Wherein, in an embodiment of the present invention, serial line interface
One of the following can be included：I2C interfaces, SPI interface, UART interface or single bus interface.This device passes through GPIO port
The function of serial line interface is realized, the expenditure cost of conversion chip is saved, can also be conveniently realized to multiple serial line interfaces
Simulation, so when needing to switch serial line interface, without the need for being changed to hardware, save the expenditure of time cost and hardware into
This.
When conducting interviews to GPIO port, in addition it is also necessary to which port is configured, then this device also includes GPIO ends
Mouth configuration module 204：For and being input into or output electricity for input or output state according to serial line interface instruction configuration GPIO port
Flat high low state.By configuring to GPIO port, the operation next to GPIO port is facilitated.
For the access of GPIO can be realized by the port operation function in DDK, then GPIO port access modules are also
For the port operation function for calling windows DDK to provide.The complexity that GPIO port access be can be reduced using DDK functions
Degree.
In certain embodiments, serial line interface instruction acquisition module is additionally operable to obtain the transmission of DeviceIOControl functions
IO control codes, so as to application layer achieves the access to GPIO port indirectly.
In certain embodiments, GPIO port access modules are additionally operable to the virtuality of the LPC controller for obtaining PC South Bridge chips
Memory address accesses the corresponding depositor of GPIO port, so as to realize the access under windows platforms to GPIO port.
It should be noted that herein, term " including ", "comprising" or its any other variant are intended to non-row
His property includes, so that a series of process, method, article or terminal unit including key elements not only includes that those will
Element, but also other key elements including being not expressly set out, or also include for this process, method, article or terminal
The intrinsic key element of equipment.In the absence of more restrictions, by wanting that sentence " including ... " or " including ... " are limited
Element, it is not excluded that also there is other key element in process, method, article or the terminal unit for including the key element.
Those skilled in the art are it should be appreciated that the various embodiments described above can be provided as method, device or computer program product
Product.These embodiments can adopt complete hardware embodiment, complete software embodiment or with reference to software and hardware in terms of embodiment
Form.All or part of step in the method that the various embodiments described above are related to can be instructed by program correlation hardware come
Complete, described program can be stored in the storage medium that computer equipment can read, for executing the various embodiments described above side
All or part of step described in method.The computer equipment, including but not limited to：Personal computer, server, general-purpose computations
Machine, special-purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, intelligent home device, Wearable
Smart machine, vehicle intelligent equipment etc.；Described storage medium, including but not limited to：RAM, ROM, magnetic disc, tape, CD, sudden strain of a muscle
Deposit, USB flash disk, portable hard drive, storage card, memory stick, webserver storage, network cloud storage etc..
The various embodiments described above are with reference to the method according to embodiment, equipment (system) and computer program
Flow chart and/or block diagram are describing.It should be understood that can by computer program instructions flowchart and/or block diagram in every
One flow process and/or the combination of square frame and flow chart and/or the flow process in block diagram and/or square frame.These computers can be provided
Programmed instruction to computer equipment processor producing a machine so that by the finger of the computing device of computer equipment
Order is produced is used for what realization was specified in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames
The device of function.
These computer program instructions may be alternatively stored in the computer that computer equipment can be guided to work in a specific way and set
In standby readable memory so that the instruction being stored in the computer equipment readable memory produces the manufacture for including command device
Product, the command device are realized in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frame middle fingers
Fixed function.
These computer program instructions can be also loaded in computer equipment so that executed on a computing device a series of
To produce computer implemented process, the instruction so as to execute on a computing device is provided for realization in flow process operating procedure
The step of function of specifying in one flow process of figure or one square frame of multiple flow processs and/or block diagram or multiple square frames.
Although being described to the various embodiments described above, those skilled in the art once know basic wound
The property made concept, then can make other change and modification to these embodiments, so embodiments of the invention are the foregoing is only,
Not thereby the scope of patent protection of the present invention, equivalent structure that every utilization description of the invention and accompanying drawing content made are limited
Or equivalent flow conversion, or other related technical fields are directly or indirectly used in, it is included in the patent of the present invention in the same manner
Within protection domain.
Claims (12)
1. the method that the GPIO based on windows platforms simulates serial line interface, it is characterised in that comprise the steps：
Obtain serial line interface instruction；
Serial line interface is obtained according to serial interface protocol and instructs corresponding level sequential；
Windows kernel-driven function access GPIO ports are called according to level sequential.
2. the method that the GPIO based on windows platforms according to claim 1 simulates serial line interface, it is characterised in that：
The acquisition serial line interface instruction step is specially：Obtain the IO control codes that DeviceIOControl functions send.
3. the method that the GPIO based on windows platforms according to claim 1 simulates serial line interface, it is characterised in that
Also include step after " obtaining serial line interface instruction "：
The high low state that configuration GPIO port is input or output state and input or output level is instructed according to serial line interface.
4. the method that the GPIO based on windows platforms according to claim 1 simulates serial line interface, it is characterised in that
Described windows kernel-driven function access GPIO ports are called to include calling windows DDK to provide according to level sequential
Port operation function.
5. the method that the GPIO based on windows platforms according to claim 1 simulates serial line interface, it is characterised in that
Described windows kernel-driven function access GPIO port steps are called also to include according to level sequential：Obtain PC South Bridge chips
The virtual memory address of LPC controller access the corresponding depositor of GPIO port.
6. the method that the GPIO based on windows platforms according to any one of claim 1 to 5 simulates serial line interface, its
It is characterised by, the serial line interface includes one of the following：I2C interfaces, SPI interface, UART interface or single bus interface.
7. the GPIO based on windows platforms simulates the device of serial line interface, it is characterised in that include such as lower module：
Serial line interface instruction acquisition module：For obtaining serial line interface instruction；
Level timing acquisition module：For serial line interface being obtained according to serial interface protocol instruct corresponding level sequential；
GPIO port access modules：For calling windows kernel-driven function access GPIO ports according to level sequential.
8. the GPIO based on windows platforms according to claim 7 simulates the device of serial line interface, it is characterised in that：
Serial line interface instruction acquisition module is additionally operable to obtain DeviceIOControl functions transmission IO control codes.
9. the GPIO based on windows platforms according to claim 7 simulates the device of serial line interface, it is characterised in that
Also include GPIO port configuration module：For being input or output state and defeated according to serial line interface instruction configuration GPIO port
Enter or output level high low state.
10. the GPIO based on windows platforms according to claim 7 simulates the device of serial line interface, it is characterised in that
GPIO port access modules are additionally operable to the port operation function for calling windows DDK to provide.
11. GPIO based on windows platforms according to claim 7 simulate the device of serial line interface, it is characterised in that
The virtual memory address access GPIO port that GPIO port access modules are additionally operable to the LPC controller for obtaining PC South Bridge chips is corresponding
Depositor.
12. GPIO based on windows platforms according to any one of claim 7 to 11 simulate the device of serial line interface,
Characterized in that, the serial line interface includes one of the following：I2C interfaces, SPI interface, UART interface or single bus interface.
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| CN201610959567.0A CN106502930B (en) | 2016-10-27 | 2016-10-27 | The method and apparatus of GPIO simulation serial line interface based on windows platform |
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|---|---|---|---|
| CN201610959567.0A CN106502930B (en) | 2016-10-27 | 2016-10-27 | The method and apparatus of GPIO simulation serial line interface based on windows platform |
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| CN106502930A true CN106502930A (en) | 2017-03-15 |
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Cited By (7)
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| CN106991299A (en) * | 2017-05-05 | 2017-07-28 | 济南浪潮高新科技投资发展有限公司 | A kind of encryption authentication module and the BIOS/firmware guard method based on the module |
| CN109491946A (en) * | 2018-11-12 | 2019-03-19 | 郑州云海信息技术有限公司 | A kind of chip and method for I2C bus extension |
| CN109856485A (en) * | 2019-02-27 | 2019-06-07 | 四川爱联科技有限公司 | Low-power consumption bracelet device, bracelet debugging system and adjustment method |
| CN111045476A (en) * | 2019-12-18 | 2020-04-21 | 湖南国科微电子股份有限公司 | Time sequence waveform control method, system, equipment and medium under multi-core CPU system |
| CN112631967A (en) * | 2020-12-18 | 2021-04-09 | 北京中电华大电子设计有限责任公司 | High-capacity TF-SIM card and communication method thereof |
| CN113360431A (en) * | 2021-06-21 | 2021-09-07 | 南京中消安全技术有限公司 | Method and device for controlling GPIO port in Linux operating system user space |
| CN115033520A (en) * | 2022-07-11 | 2022-09-09 | 深圳市金科泰通信设备有限公司 | IIC data transmission method and device, single chip microcomputer equipment and storage medium |
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| CN106991299A (en) * | 2017-05-05 | 2017-07-28 | 济南浪潮高新科技投资发展有限公司 | A kind of encryption authentication module and the BIOS/firmware guard method based on the module |
| CN109491946A (en) * | 2018-11-12 | 2019-03-19 | 郑州云海信息技术有限公司 | A kind of chip and method for I2C bus extension |
| CN109856485A (en) * | 2019-02-27 | 2019-06-07 | 四川爱联科技有限公司 | Low-power consumption bracelet device, bracelet debugging system and adjustment method |
| CN109856485B (en) * | 2019-02-27 | 2021-05-25 | 四川爱联科技股份有限公司 | Low-power-consumption bracelet device, bracelet debugging system and debugging method |
| CN111045476A (en) * | 2019-12-18 | 2020-04-21 | 湖南国科微电子股份有限公司 | Time sequence waveform control method, system, equipment and medium under multi-core CPU system |
| CN111045476B (en) * | 2019-12-18 | 2021-07-27 | 湖南国科微电子股份有限公司 | Time sequence waveform control method, system, equipment and medium under multi-core CPU system |
| CN112631967A (en) * | 2020-12-18 | 2021-04-09 | 北京中电华大电子设计有限责任公司 | High-capacity TF-SIM card and communication method thereof |
| CN112631967B (en) * | 2020-12-18 | 2023-12-26 | 北京中电华大电子设计有限责任公司 | High-capacity TF-SIM card and communication method thereof |
| CN113360431A (en) * | 2021-06-21 | 2021-09-07 | 南京中消安全技术有限公司 | Method and device for controlling GPIO port in Linux operating system user space |
| CN115033520A (en) * | 2022-07-11 | 2022-09-09 | 深圳市金科泰通信设备有限公司 | IIC data transmission method and device, single chip microcomputer equipment and storage medium |
| CN115033520B (en) * | 2022-07-11 | 2023-08-08 | 深圳市金科泰通信设备有限公司 | IIC data transmission method and device, singlechip equipment and storage medium |
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