CN110049003A - The method and device that AT instruction is divided by frame - Google Patents
The method and device that AT instruction is divided by frame Download PDFInfo
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- CN110049003A CN110049003A CN201910156450.2A CN201910156450A CN110049003A CN 110049003 A CN110049003 A CN 110049003A CN 201910156450 A CN201910156450 A CN 201910156450A CN 110049003 A CN110049003 A CN 110049003A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Computer Security & Cryptography (AREA)
- Communication Control (AREA)
Abstract
The invention discloses AT instructions by the method and device of frame segmentation, divides the Echo Frame of AT command set, the code of each Echo Frame is made to enter one of N kind state；N is positive integer.Preferably, N can be 6, at this time the code of Echo Frame possibly into state have 6 kinds.This 6 kinds of states may include: original state, preprocessed state 1, preprocessed state 2, content frame collection status, content frame collects completion status, frame collects success status.The present invention carries out abstract analysis by the frame structure to AT command set, state switching is carried out using code of the state machine to Echo Frame, divide the different frame received when receiving data while can be, and the data frame after segmentation is supplied to protocol analysis layer as a whole and carries out protocol analysis, thus effectively shield the data for not meeting frame structure, it avoids it from being transmitted to protocol analysis layer from data link layer, reduces the occupancy of CPU, improve the execution efficiency of code.
Description
Technical field
The present invention relates to the method and devices that the technical field of communications protocol more particularly to AT instruction are divided by frame.
Background technique
AT command set is a kind of communications protocol, host by specific communication modes (RS232 UART SPI EathNet)
Send slave with the mode of " frame " for the plain code information for describing certain command/parameter, slave does AT command set, carry out parsing and
Response.
The slave of the prior art can not shield the invalid data in AT command set, lead to not meet the data of frame structure from number
It is transmitted to protocol analysis layer according to link layer, causes the occupancy of CPU high, the execution efficiency of code is low.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide AT instructions by the method and dress of frame segmentation
It sets, it is intended to which the slave for solving the prior art can not shield invalid data in AT command set, lead to the data for not meeting frame structure
It is transmitted to protocol analysis layer from data link layer, causes the occupancy of CPU high, the low problem of the execution efficiency of code.
The purpose of the present invention is implemented with the following technical solutions:
A kind of method that AT instruction is divided by frame, comprising:
The Echo Frame for dividing AT command set, makes the code of each Echo Frame enter one of N kind state；N is positive integer.
On the basis of the above embodiments, it is preferred that N=6.
On the basis of the above embodiments, it is preferred that N kind state includes: original state, preprocessed state 1, pretreatment shape
State 2, content frame collection status, content frame collect completion status, frame collects success status.
On the basis of the above embodiments, it is preferred that the method specifically includes:
Code receive in the initial state r character, then enter preprocessed state 1；
Code received under preprocessed state 1 n character, then enter preprocessed state 2；
Code receives other character under preprocessed state 2, then enters content frame collection status；The other character
Including be not belonging to r, n character other ASCII character characters；
Code received under content frame collection status n character or other character, then maintain content frame collection status；
Code received under content frame collection status r character, then enter content frame collect completion status；
Code content frame collect completion status under receive n character, then enter frame collect success status；
Code, automatically into preprocessed state 2 is arrived, waits to be received after adjusting back frame analytical function under frame collects success status
Next Echo Frame of<STATUS>character or AT command set.
On the basis of the above embodiments, it is preferred that the method also includes:
Code receive in the initial state n character or other character, then maintain original state；
Code received under preprocessed state 1 r character, then maintain preprocessed state 1；Code is under preprocessed state 1
Other character is received, then enters original state；
Code received under preprocessed state 2 r character, then enter preprocessed state 1；Code is under preprocessed state 2
Receive n character, then enter original state；
Code received under content frame collection status n character, then enter original state；
Code content frame collect completion status under receive r character, then enter preprocessed state 1；Code is in content frame
It collects and receives other character under completion status, then enter original state.
A kind of device that AT instruction is divided by frame, described device are used for:
The Echo Frame for dividing AT command set, makes the code of each Echo Frame enter one of N kind state；N is positive integer.
On the basis of the above embodiments, it is preferred that N=6.
On the basis of the above embodiments, it is preferred that N kind state includes: original state, preprocessed state 1, pretreatment shape
State 2, content frame collection status, content frame collect completion status, frame collects success status.
On the basis of the above embodiments, it is preferred that described device is for executing:
Code receive in the initial state r character, then enter preprocessed state 1；
Code received under preprocessed state 1 n character, then enter preprocessed state 2；
Code receives other character under preprocessed state 2, then enters content frame collection status；The other character
Including be not belonging to r, n character other ASCII character characters；
Code received under content frame collection status n character or other character, then maintain content frame collection status；
Code received under content frame collection status r character, then enter content frame collect completion status；
Code content frame collect completion status under receive n character, then enter frame collect success status；
Code, automatically into preprocessed state 2 is arrived, waits to be received after adjusting back frame analytical function under frame collects success status
Next Echo Frame of<STATUS>character or AT command set.
On the basis of the above embodiments, it is preferred that described device is also used to execute:
Code receive in the initial state n character or other character, then maintain original state；
Code received under preprocessed state 1 r character, then maintain preprocessed state 1；Code is under preprocessed state 1
Other character is received, then enters original state；
Code received under preprocessed state 2 r character, then enter preprocessed state 1；Code is under preprocessed state 2
Receive n character, then enter original state；
Code received under content frame collection status n character, then enter original state；
Code content frame collect completion status under receive r character, then enter preprocessed state 1；Code is in content frame
It collects and receives other character under completion status, then enter original state.
Compared with prior art, the beneficial effects of the present invention are:
The invention discloses AT instructions by the method and device of frame segmentation, is abstracted by the frame structure to AT command set
Analysis carries out state switching to the code of Echo Frame using state machine, divides while can be when receiving data and to receive
Different frame, and the data frame after segmentation is supplied to protocol analysis layer as a whole and carries out protocol analysis, thus effectively
The data for not meeting frame structure are shielded, it is avoided to be transmitted to protocol analysis layer from data link layer, reduce the occupancy of CPU
Rate improves the execution efficiency of code.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 shows a kind of flow diagram of method that AT instruction is divided by frame provided in an embodiment of the present invention.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
" frame " structure of AT command set has different definition according to different definition person, but substantially usage is essentially identical.
In the present invention, " frame " structure of AT command set uses following format:
1. command format
AT+<str>\r
A) AT+:AT instruction prefixes；
B)<str>: instruction, parameter character string can be sky and can show character (ASCII character: 0x20~0x7f), but not
It can be AT+ character string；
C) r: carriage return end mark, ASCII character: 0x0d；
2. responding format
\r\n<str>\r\n[<STATUS>\r\n]
A) r: carriage return end mark, ASCII character: 0x0d；
B) n: newline, ASCII character: 0x0a；
C)<str>: the instruction of corresponding command format, parameter character string, it cannot You r and n character；
D)<STATUS>: instruction execution state, cannot have r and n character, but can be not present；It is subsequent when it be not present
R n be also not present.
Specific embodiment one
The embodiment of the invention provides a kind of AT instructions by the method for frame segmentation, comprising:
The Echo Frame for dividing AT command set, makes the code of each Echo Frame enter one of N kind state；N is positive integer.
Without limitation to N, N can be 6 to the embodiment of the present invention.At this time the code of Echo Frame possibly into state have 6 kinds.
This 6 kinds of states may include: original state, preprocessed state 1, preprocessed state 2, content frame collection status, frame
Content collecting completion status, frame collect success status.
As shown in Figure 1, for above-mentioned 6 kinds of states, way of the present invention when dividing Echo Frame can be specifically included following
Processing:
Code receive in the initial state r character, then enter preprocessed state 1；
Code received under preprocessed state 1 n character, then enter preprocessed state 2；
Code receives other character under preprocessed state 2, then enters content frame collection status；The other character
Including be not belonging to r, n character other ASCII character characters；
Code received under content frame collection status n character or other character, then maintain content frame collection status；
Code received under content frame collection status r character, then enter content frame collect completion status；
Code content frame collect completion status under receive n character, then enter frame collect success status；
Code, automatically into preprocessed state 2 is arrived, waits to be received after adjusting back frame analytical function under frame collects success status
Next Echo Frame of<STATUS>character or AT command set.
As shown in Figure 1, the method can also include:
Code receive in the initial state n character or other character, then maintain original state；
Code received under preprocessed state 1 r character, then maintain preprocessed state 1；Code is under preprocessed state 1
Other character is received, then enters original state；
Code received under preprocessed state 2 r character, then enter preprocessed state 1；Code is under preprocessed state 2
Receive n character, then enter original state；
Code received under content frame collection status n character, then enter original state；
Code content frame collect completion status under receive r character, then enter preprocessed state 1；Code is in content frame
It collects and receives other character under completion status, then enter original state.
The embodiment of the present invention carries out abstract analysis by the frame structure to AT command set, using state machine to the generation of Echo Frame
Code carries out state switching, and the minimum unit " frame " that communications protocol is cut in the data link layer for receiving code is supplied to agreement solution
Layer is analysed, while masking invalid data；It divides the different frame received when receiving data while the present invention can be, and will divide
Data frame after cutting is supplied to protocol analysis layer as a whole and carries out protocol analysis, thus effectively shields and does not meet frame
The data of structure avoid it from being transmitted to protocol analysis layer from data link layer, reduce the occupancy of CPU, improve code
Execution efficiency.
In above-mentioned specific embodiment one, provides AT and instruct the method divided by frame, corresponding, the application
AT instruction is also provided by the device of frame segmentation.Since Installation practice is substantially similar to embodiment of the method, so describing to compare
Simply, the relevent part can refer to the partial explaination of embodiments of method.Installation practice described below is only schematical.
Specific embodiment two
The embodiment of the invention provides a kind of AT instructions by the device of frame segmentation, and described device is used for:
The Echo Frame for dividing AT command set, makes the code of each Echo Frame enter one of N kind state；N is positive integer.
In the embodiment of the present invention, N can be 6.
In the embodiment of the present invention, N kind state may include: original state, preprocessed state 1, preprocessed state 2, in frame
Hold collection status, content frame collects completion status, frame collects success status.
Described device can be used for executing:
Code receive in the initial state r character, then enter preprocessed state 1；
Code received under preprocessed state 1 n character, then enter preprocessed state 2；
Code receives other character under preprocessed state 2, then enters content frame collection status；The other character
Including be not belonging to r, n character other ASCII character characters；
Code received under content frame collection status n character or other character, then maintain content frame collection status；
Code received under content frame collection status r character, then enter content frame collect completion status；
Code content frame collect completion status under receive n character, then enter frame collect success status；
Code, automatically into preprocessed state 2 is arrived, waits to be received after adjusting back frame analytical function under frame collects success status
Next Echo Frame of<STATUS>character or AT command set.
Described device can be also used for executing:
Code receive in the initial state n character or other character, then maintain original state；
Code received under preprocessed state 1 r character, then maintain preprocessed state 1；Code is under preprocessed state 1
Other character is received, then enters original state；
Code received under preprocessed state 2 r character, then enter preprocessed state 1；Code is under preprocessed state 2
Receive n character, then enter original state；
Code received under content frame collection status n character, then enter original state；
Code content frame collect completion status under receive r character, then enter preprocessed state 1；Code is in content frame
It collects and receives other character under completion status, then enter original state.
The embodiment of the present invention carries out abstract analysis by the frame structure to AT command set, using state machine to the generation of Echo Frame
Code carries out state switching, and the minimum unit " frame " that communications protocol is cut in the data link layer for receiving code is supplied to agreement solution
Layer is analysed, while masking invalid data；It divides the different frame received when receiving data while the present invention can be, and will divide
Data frame after cutting is supplied to protocol analysis layer as a whole and carries out protocol analysis, thus effectively shields and does not meet frame
The data of structure avoid it from being transmitted to protocol analysis layer from data link layer, reduce the occupancy of CPU, improve code
Execution efficiency.
The present invention is from using in purpose, and in efficiency, the viewpoints such as progressive and novelty are illustrated, the practical progress having
Property, having met the function that Patent Law is emphasized promotes and uses important document, and more than the present invention explanation and attached drawing are only of the invention
Preferred embodiment not limits to the present invention with this, therefore, it is all with the present invention construct, device, the approximations such as feature, thunder
With, i.e., all according to equivalent replacement made by present patent application range or modification etc., the patent application that should all belong to of the invention is protected
Within the scope of shield.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.Although present invention has been a degree of descriptions, it will be apparent that, in the item for not departing from the spirit and scope of the present invention
Under part, the appropriate variation of each condition can be carried out.It is appreciated that the present invention is not limited to the embodiments, and it is attributed to right and wants
The range asked comprising the equivalent replacement of each factor.It will be apparent to those skilled in the art that can as described above
Various other corresponding changes and deformation are made in technical solution and design, and all these change and deformation is all answered
Within this is belonged to the protection scope of the claims of the invention.
Claims (10)
1. a kind of AT instruction is by the method for frame segmentation characterized by comprising
The Echo Frame for dividing AT command set, makes the code of each Echo Frame enter one of N kind state；N is positive integer.
2. AT instruction according to claim 1 is by the method for frame segmentation, which is characterized in that N=6.
3. AT instruction according to claim 2 is by the method for frame segmentation, which is characterized in that N kind state includes: initial shape
State, preprocessed state 1, preprocessed state 2, content frame collection status, content frame collect completion status, frame collects success status.
4. AT instruction according to claim 3 is by the method for frame segmentation, which is characterized in that the method specifically includes:
Code receive in the initial state r character, then enter preprocessed state 1；
Code received under preprocessed state 1 n character, then enter preprocessed state 2；
Code receives other character under preprocessed state 2, then enters content frame collection status；The other character includes
Be not belonging to r, n character other ASCII character characters；
Code received under content frame collection status n character or other character, then maintain content frame collection status；Code
Received under content frame collection status r character, then enter content frame collect completion status；
Code content frame collect completion status under receive n character, then enter frame collect success status；
Code frame collect success status under adjust back frame analytical function after, automatically into arrive preprocessed state 2, wait it is to be received <
Next Echo Frame of STATUS > character or AT command set.
5. AT instruction according to claim 4 is by the method for frame segmentation, which is characterized in that the method also includes:
Code receive in the initial state n character or other character, then maintain original state；
Code received under preprocessed state 1 r character, then maintain preprocessed state 1；Code receives under preprocessed state 1
To other character, then enter original state；
Code received under preprocessed state 2 r character, then enter preprocessed state 1；Code receives under preprocessed state 2
To n character, then enter original state；
Code received under content frame collection status n character, then enter original state；
Code content frame collect completion status under receive r character, then enter preprocessed state 1；Code is collected in content frame
Other character is received under completion status, then enters original state.
6. a kind of AT instruction is by the device of frame segmentation, which is characterized in that described device is used for:
The Echo Frame for dividing AT command set, makes the code of each Echo Frame enter one of N kind state；N is positive integer.
7. AT instruction according to claim 6 is by the device of frame segmentation, which is characterized in that N=6.
8. AT instruction according to claim 7 is by the device of frame segmentation, which is characterized in that N kind state includes: initial shape
State, preprocessed state 1, preprocessed state 2, content frame collection status, content frame collect completion status, frame collects success status.
9. AT instruction according to claim 8 is by the device of frame segmentation, which is characterized in that described device is for executing:
Code receive in the initial state r character, then enter preprocessed state 1；
Code received under preprocessed state 1 n character, then enter preprocessed state 2；
Code receives other character under preprocessed state 2, then enters content frame collection status；The other character includes
Be not belonging to r, n character other ASCII character characters；
Code received under content frame collection status n character or other character, then maintain content frame collection status；Code
Received under content frame collection status r character, then enter content frame collect completion status；
Code content frame collect completion status under receive n character, then enter frame collect success status；
Code frame collect success status under adjust back frame analytical function after, automatically into arrive preprocessed state 2, wait it is to be received <
Next Echo Frame of STATUS > character or AT command set.
10. AT instruction according to claim 9 is by the device of frame segmentation, which is characterized in that described device is also used to execute:
Code receive in the initial state n character or other character, then maintain original state；
Code received under preprocessed state 1 r character, then maintain preprocessed state 1；Code receives under preprocessed state 1
To other character, then enter original state；
Code received under preprocessed state 2 r character, then enter preprocessed state 1；Code receives under preprocessed state 2
To n character, then enter original state；
Code received under content frame collection status n character, then enter original state；
Code content frame collect completion status under receive r character, then enter preprocessed state 1；Code is collected in content frame
Other character is received under completion status, then enters original state.
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| CN201910156450.2A CN110049003A (en) | 2019-03-01 | 2019-03-01 | The method and device that AT instruction is divided by frame |
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| CN201910156450.2A CN110049003A (en) | 2019-03-01 | 2019-03-01 | The method and device that AT instruction is divided by frame |
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| CN101035372A (en) * | 2007-02-15 | 2007-09-12 | 重庆重邮信科股份有限公司 | Fast matching method of AT instruction identifier |
| CN101119522A (en) * | 2007-08-22 | 2008-02-06 | 中兴通讯股份有限公司 | Method for simulating AT command report |
| CN103634163A (en) * | 2013-09-27 | 2014-03-12 | 国家电网公司 | Method for testing interchangeability of remote communication unit of acquisition terminal |
| CN105279070A (en) * | 2015-10-14 | 2016-01-27 | 安徽四创电子股份有限公司 | Bus communication method for time synchronization device and bus communication device for time synchronization device |
| CN105760134A (en) * | 2016-02-03 | 2016-07-13 | 四川九洲电器集团有限责任公司 | Data processing method and electronic equipment |
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2019
- 2019-03-01 CN CN201910156450.2A patent/CN110049003A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101035372A (en) * | 2007-02-15 | 2007-09-12 | 重庆重邮信科股份有限公司 | Fast matching method of AT instruction identifier |
| CN101119522A (en) * | 2007-08-22 | 2008-02-06 | 中兴通讯股份有限公司 | Method for simulating AT command report |
| CN103634163A (en) * | 2013-09-27 | 2014-03-12 | 国家电网公司 | Method for testing interchangeability of remote communication unit of acquisition terminal |
| CN105279070A (en) * | 2015-10-14 | 2016-01-27 | 安徽四创电子股份有限公司 | Bus communication method for time synchronization device and bus communication device for time synchronization device |
| CN105760134A (en) * | 2016-02-03 | 2016-07-13 | 四川九洲电器集团有限责任公司 | Data processing method and electronic equipment |
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