CN111352868B - Serial port access method, device, terminal equipment and storage medium - Google Patents
Serial port access method, device, terminal equipment and storage medium Download PDFInfo
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- CN111352868B CN111352868B CN202010236096.7A CN202010236096A CN111352868B CN 111352868 B CN111352868 B CN 111352868B CN 202010236096 A CN202010236096 A CN 202010236096A CN 111352868 B CN111352868 B CN 111352868B
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- 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
- G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention provides a serial port access method, a device and a terminal device, wherein the method is applied to the technical field of serial port communication and comprises the following steps: acquiring an access request of an application terminal; sequentially adding access requests of an application end to the tail of a preset access queue; and accessing the serial port based on the preset access queue. The serial port access method, the serial port access device and the terminal equipment provided by the invention not only support the serial port access of a single application terminal, but also support the serial port access of two or more application terminals, thereby realizing the serial port sharing among the application terminals.
Description
Technical Field
The invention belongs to the technical field of serial port communication, and particularly relates to a serial port access method, a serial port access device and terminal equipment.
Background
When an application running on a computer communicates with a serial device connected to the computer, the serial device is typically mapped to a serial port. Because the serial port communication belongs to full duplex communication and can not be connected with two application terminals at the same time, once a serial port is opened by a certain client program, other client programs can not use the serial port.
In practical application, the serial port requirement is large but the serial port access position of a computer host is limited, so how to realize serial port sharing becomes an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a serial port access method, a serial port access device and terminal equipment, and aims to solve the technical problem of serial port sharing in the prior art.
In a first aspect of the embodiments of the present invention, a serial port access method is provided, including:
acquiring an access request of an application terminal;
sequentially adding access requests of an application end to the tail of a preset access queue;
and accessing the serial port based on the preset access queue.
In a second aspect of the embodiments of the present invention, there is provided a serial access apparatus, including:
the access request acquisition module is used for acquiring an access request of an application terminal;
the request queue generating module is used for sequentially adding the access requests of the application end to the tail of a preset access queue;
and the serial port access module is used for accessing the serial port based on a preset access queue.
In a third aspect of the embodiments of the present invention, a terminal device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the serial port access method when executing the computer program.
In a fourth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, where a computer program is stored, and when the computer program is executed by a processor, the steps of the serial port access method are implemented.
The serial port access method, the serial port access device and the terminal equipment provided by the embodiment of the invention have the beneficial effects that: compared with the prior art, the serial port access method provided by the embodiment of the invention is equivalent to the fact that the network proxy service is added between the application terminal and the serial port, the access request of the application terminal is processed through the network proxy service to form an access queue, and the serial port is accessed according to the access queue. The serial port access method, the serial port access device and the terminal equipment provided by the embodiment of the invention not only support the serial port access of a single application terminal, but also support the serial port access of two or more application terminals, thereby realizing the serial port sharing among the application terminals.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flowchart of a serial port access method according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a serial port access method according to another embodiment of the present invention;
fig. 3 is a schematic flowchart of a serial port access method according to still another embodiment of the present invention;
fig. 4 is a schematic flowchart of a serial port access method according to another embodiment of the present invention;
fig. 5 is a schematic flowchart of a serial port access method according to another embodiment of the present invention;
fig. 6 is a block diagram of a serial port access device according to an embodiment of the present invention;
fig. 7 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a serial port access method according to an embodiment of the present invention, where the method includes:
s101: and acquiring an access request of an application terminal.
In this embodiment, the number of the application terminals may be one, or may be two or more, and is not limited herein.
S102: and sequentially adding the access requests of the application end to the tail of the preset access queue.
In this embodiment, the access requests may be processed according to the number of received access requests and the queue first-in-first-out principle. If only one access request of the application end is received, the access request of the application end can be directly added to the tail of the preset access queue.
And if the access requests of at least two application ends are received, sequencing the access requests of the at least two application ends according to the request time, and sequentially adding the access requests of the at least two application ends to the tail of a preset access queue according to a sequencing result. Specifically, the access requests of the at least two application terminals are added to the tail of the preset access queue according to the sequence of the request time from morning to evening, that is, the earlier the request time of the access request of a certain application terminal is, the earlier the position of the access request in the preset access queue is. The request time of a certain access request refers to the time when the access request is received.
S103: and accessing the serial port based on the preset access queue.
In this embodiment, when the serial port is accessed based on the preset access queue, after an access request is accessed, the next access request is accessed.
The method for determining whether the access request is completed may be: and periodically requesting the returned data of the serial port, and if the serial port returns the requested data of the access request, indicating that the access of the access request is finished.
As can be seen from the above description, compared with the prior art, the serial port access method provided in the embodiment of the present invention is equivalent to adding a network proxy service between the application terminal and the serial port, processing an access request of the application terminal through the network proxy service to form an access queue, and accessing the serial port according to the access queue. The serial port access method, the serial port access device and the terminal equipment provided by the embodiment of the invention not only support the serial port access of a single application terminal, but also support the serial port access of two or more application terminals, thereby realizing the serial port sharing among the application terminals.
Referring to fig. 1 and fig. 2, fig. 2 is a schematic flowchart of a serial port access method according to another embodiment of the present invention, where on the basis of the foregoing embodiment, after accessing a serial port based on a preset access queue, the serial port access method may further include:
s201: and acquiring the return data of the serial port.
S202: and adding the return data of the serial port to the tail of the preset return queue.
S203: and returning the data to the application terminal based on the preset return queue.
In this embodiment, in specific implementation, an instruction executor, a data buffer, and a serial server may be disposed between the application end and the serial port, where the instruction executor is used as a return data obtaining module, the data buffer is used as a return queue generating module, and the serial server is used as a data return module. The command executor periodically requests the return data of the serial port, if the return data of the serial port is received, the return data of the serial port is stored in the data buffer, the step S202 is executed in the data buffer, and finally the serial server returns the data to the application terminal as the return sequence based on the preset return queue.
Referring to fig. 1 and fig. 3, fig. 3 is a schematic flowchart of a serial port access method according to still another embodiment of the present invention, and on the basis of the foregoing embodiment, step S103 may be detailed as follows:
s301: and selecting the first n access requests in the preset access queue.
S302: and sequencing the first n access requests according to the request types of the first n access requests to obtain an actual access queue.
S303: and accessing the serial port based on the access sequence of each access request in the actual access queue.
S304: and deleting the first n access requests from the head of the preset access queue, and returning to execute the step of selecting the first n access requests in the preset access queue.
In this embodiment, in order to improve the access speed of serial port access, a serial port access method based on a sliding window method is provided, where the window size of a sliding window is n, and n is an integer greater than 0, and may be adaptively set according to an actual application scenario. In this embodiment, the first n access requests may be taken, the first n access requests are subjected to secondary sequencing to obtain an actual access queue, finally, the serial port is accessed according to the actual access queue, the sliding window is moved after the access is completed, and the step of taking the first n access requests is returned to be executed.
In this embodiment, the method for determining n may be:
1) the value of n can be set according to the actual access amount of the application terminal.
2) Counting the request quantity corresponding to each request type, determining the serial port response time length corresponding to each request type based on a preset relation table, and determining the value of n by adopting an optimal planning idea based on the request quantity corresponding to each request type and the serial port response time length corresponding to each request type. The optimal planned objective function may be the shortest serial port response time.
Referring to fig. 3 and fig. 4, fig. 4 is a schematic flowchart of a serial port access method according to another embodiment of the present invention, and on the basis of the foregoing embodiment, step S302 may be detailed as follows:
s401: and acquiring a preset relation table of the request type and the serial port response duration.
S402: and determining the serial port response duration of the first n access requests according to the request types of the first n access requests and a preset relation table.
S403: and sequencing the first n access requests based on the serial port response time of the first n access requests to obtain an actual access queue.
In this embodiment, serial port response time corresponding to each request type may be counted in advance, and the first n access requests may be subjected to secondary sequencing according to the serial port response time. The serial port response duration is a predicted value obtained according to historical data.
In this embodiment, the specific method for performing secondary sorting may be to perform secondary sorting on the first n access requests directly according to the magnitude relationship of the serial port response duration.
Referring to fig. 4 and 5, fig. 5 is a schematic flow chart of a serial port access method according to another embodiment of the present invention, and based on the above embodiment, the method for determining the preset relationship table may be:
s501: and acquiring the request type of the single application terminal access request and the serial port response duration corresponding to each request type.
S502: and generating a preset relation table according to the request type of the single application terminal access request and the serial port response duration corresponding to each request type.
In this embodiment, the history data may be acquired, and the preset relationship table may be generated according to the history data. The historical data comprises request types of single application terminal access requests and serial port response duration corresponding to the request types, and the preset relation table comprises the request types and the serial port response duration corresponding to the request types. The serial port response duration corresponding to a certain request type in the preset relation table is an average value of the serial port response durations corresponding to the request type in the historical data.
Fig. 6 is a block diagram of a serial port access device according to an embodiment of the present invention, which corresponds to the serial port access method according to the foregoing embodiment. For convenience of explanation, only portions related to the embodiments of the present invention are shown. Referring to fig. 6, the apparatus 60 includes: an access request acquisition module 61, a request queue generation module 62 and a serial port access module 63.
The access request obtaining module 61 is configured to obtain an access request of an application.
And a request queue generating module 62, configured to add the access requests of the application end to the tail of the preset access queue in sequence.
And the serial port access module 63 is used for accessing the serial port based on a preset access queue.
Optionally, referring to fig. 6, as a specific implementation manner of the serial access apparatus provided in the embodiment of the present invention, the serial access apparatus 60 may further include:
and a return data acquiring module 64, configured to acquire return data of the serial port.
And the return queue generating module 65 is configured to add the return data of the serial port to the tail of the preset return queue.
And a data return module 66, configured to return data to the application terminal based on the preset return queue.
Optionally, as a specific implementation manner of the serial access device provided in the embodiment of the present invention, the serial access module 63 is specifically configured to execute the following steps:
and selecting the first n access requests in the preset access queue.
And sequencing the first n access requests according to the request types of the first n access requests to obtain an actual access queue.
And accessing the serial port based on the access sequence of each access request in the actual access queue.
And deleting the first n access requests from the head of the preset access queue, and returning to execute the step of selecting the first n access requests in the preset access queue.
Optionally, as a specific implementation manner of the serial access device provided in the embodiment of the present invention, the first n access requests are sequenced according to request types of the first n access requests to obtain an actual access queue, which may be detailed as follows:
and acquiring a preset relation table of the request type and the serial port response duration.
And determining the serial port response duration of the first n access requests according to the request types of the first n access requests and a preset relation table.
And sequencing the first n access requests based on the serial port response time of the first n access requests to obtain an actual access queue.
Optionally, as a specific implementation manner of the serial access device provided in the embodiment of the present invention, the method for determining the preset relationship table may be:
and acquiring the request type of the single application terminal access request and the serial port response duration corresponding to each request type.
And generating a preset relation table according to the request type of the single application terminal access request and the serial port response duration corresponding to each request type.
Referring to fig. 7, fig. 7 is a schematic block diagram of a terminal device according to an embodiment of the present invention. The terminal 700 in the present embodiment shown in fig. 7 may include: one or more processors 701, one or more input devices 702, one or more output devices 703, and one or more memories 704. The processor 701, the input device 702, the output device 703 and the memory 704 are in communication with each other via a communication bus 705. The memory 704 is used to store computer programs, which include program instructions. The processor 701 is configured to execute program instructions stored by the memory 704. The processor 701 is configured to call a program instruction to perform the following functions for operating the modules/units in the device embodiments, such as the functions of the modules 61 to 66 shown in fig. 6.
It should be understood that, in the embodiment of the present invention, the Processor 701 may be a Central Processing Unit (CPU), and the Processor may also be other general processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The input device 702 may include a touch pad, a fingerprint sensor (for collecting fingerprint information of a user and direction information of the fingerprint), a microphone, etc., and the output device 703 may include a display (LCD, etc.), a speaker, etc.
The memory 704 may include both read-only memory and random-access memory, and provides instructions and data to the processor 701. A portion of the memory 704 may also include non-volatile random access memory. For example, the memory 704 may also store device type information.
In a specific implementation, the processor 701, the input device 702, and the output device 703 described in this embodiment of the present invention may execute the implementation manners described in the first embodiment and the second embodiment of the serial port access method provided in this embodiment of the present invention, and may also execute the implementation manner of the terminal described in this embodiment of the present invention, which is not described herein again.
In another embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored, where the computer program includes program instructions, and the program instructions, when executed by a processor, implement all or part of the processes in the method of the above embodiments, and may also be implemented by a computer program instructing associated hardware, and the computer program may be stored in a computer-readable storage medium, and the computer program, when executed by a processor, may implement the steps of the above methods embodiments. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The computer readable storage medium may be an internal storage unit of the terminal of any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk provided on the terminal, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium is used for storing a computer program and other programs and data required by the terminal. The computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the terminal and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed terminal and method can be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces or units, and may also be an electrical, mechanical or other form of connection.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A serial port access method is characterized by comprising the following steps:
acquiring an access request of an application terminal; sequentially adding access requests of an application end to the tail of a preset access queue; accessing the serial port based on a preset access queue;
wherein, the access to the serial port based on the preset access queue comprises: selecting the first n access requests in a preset access queue; sequencing the first n access requests according to the request types of the first n access requests to obtain an actual access queue; accessing the serial port based on the access sequence of each access request in the actual access queue; deleting the first n access requests from the head of the preset access queue, and returning to execute the step of selecting the first n access requests in the preset access queue;
the sequencing the first n access requests according to the request types of the first n access requests to obtain an actual access queue includes: acquiring a preset relation table of request types and serial port response duration; determining serial port response time length of the first n access requests according to the request types of the first n access requests and a preset relation table; sequencing the first n access requests based on the serial port response duration of the first n access requests to obtain an actual access queue;
the determination method of n comprises the following steps: counting the request quantity corresponding to each request type, determining the serial port response time length corresponding to each request type based on a preset relation table, and determining the value of n by adopting an optimal planning idea based on the request quantity corresponding to each request type and the serial port response time length corresponding to each request type, wherein the optimal planning objective function is the shortest serial port response time.
2. The serial port access method according to claim 1, after accessing the serial port based on the preset access queue, further comprising:
acquiring return data of the serial port;
adding the return data of the serial port to the tail of a preset return queue;
and returning the data to the application terminal based on the preset return queue.
3. The serial port access method according to claim 1, wherein the determination method of the preset relationship table is as follows:
acquiring request types of single application terminal access requests and serial port response durations corresponding to the request types;
and generating a preset relation table according to the request type of the single application terminal access request and the serial port response duration corresponding to each request type.
4. A serial access device, comprising:
the access request acquisition module is used for acquiring an access request of an application terminal;
the request queue generating module is used for sequentially adding the access requests of the application end to the tail of a preset access queue;
the serial port access module is used for accessing the serial port based on a preset access queue;
the serial port access module is specifically used for executing the following steps:
selecting the first n access requests in a preset access queue;
sequencing the first n access requests according to the request types of the first n access requests to obtain an actual access queue;
accessing the serial port based on the access sequence of each access request in the actual access queue;
deleting the first n access requests from the head of the preset access queue, and returning to execute the step of selecting the first n access requests in the preset access queue;
the sequencing the first n access requests according to the request types of the first n access requests to obtain an actual access queue includes: acquiring a preset relation table of request types and serial port response duration; determining serial port response time length of the first n access requests according to the request types of the first n access requests and a preset relation table; sequencing the first n access requests based on the serial port response duration of the first n access requests to obtain an actual access queue;
the determination method of n comprises the following steps: counting the request quantity corresponding to each request type, determining the serial port response time length corresponding to each request type based on a preset relation table, and determining the value of n by adopting an optimal planning idea based on the request quantity corresponding to each request type and the serial port response time length corresponding to each request type, wherein the optimal planning objective function is the shortest serial port response time.
5. The serial access device of claim 4, further comprising:
the return data acquisition module is used for acquiring the return data of the serial port;
the return queue generating module is used for adding the return data of the serial port to the tail of the preset return queue;
and the data return module is used for returning data to the application terminal based on the preset return queue.
6. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 3 when executing the computer program.
7. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101699421A (en) * | 2009-10-28 | 2010-04-28 | 深圳华为通信技术有限公司 | Method and server for sharing serial port |
| CN103995674A (en) * | 2014-04-17 | 2014-08-20 | 华为技术有限公司 | Method, device and equipment for processing access requests |
| US10552348B2 (en) * | 2015-09-30 | 2020-02-04 | Huawei Technologies Co., Ltd. | USB device access method, apparatus and system, a terminal, and a server |
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| EP2352081B1 (en) * | 2008-09-29 | 2014-12-31 | International Business Machines Corporation | Apparatus, method and program for deciding data recall order |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699421A (en) * | 2009-10-28 | 2010-04-28 | 深圳华为通信技术有限公司 | Method and server for sharing serial port |
| CN103995674A (en) * | 2014-04-17 | 2014-08-20 | 华为技术有限公司 | Method, device and equipment for processing access requests |
| US10552348B2 (en) * | 2015-09-30 | 2020-02-04 | Huawei Technologies Co., Ltd. | USB device access method, apparatus and system, a terminal, and a server |
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