CN105676052B - A kind of method and system of serial ports line sequence identification - Google Patents
A kind of method and system of serial ports line sequence identification Download PDFInfo
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- CN105676052B CN105676052B CN201610053017.2A CN201610053017A CN105676052B CN 105676052 B CN105676052 B CN 105676052B CN 201610053017 A CN201610053017 A CN 201610053017A CN 105676052 B CN105676052 B CN 105676052B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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Abstract
A kind of recognition methods of serial ports line interface and system include：Step S10：Whether detection currently has Serial Port Line access step S20：According to the interface type of the Serial Port Line of access, each pin of serial ports line interface is tentatively identified；Step S30：To transmission (TXD)/reception (RXD) pin tentatively identified, obtains its level information and again identified that；Step S50：According to the pin of the serial ports line interface identified, the signal conduction of Serial Port Line will be accessed；Step S60：When detecting that Serial Port Line is extracted, Serial Port Line signal is cut off.The realization of this method and system brings great convenience to maintenance and debugging.
Description
Technical field
The present invention relates to field of data communication, more particularly to a kind of method and system of serial ports line sequence identification.
Background technology
Serial line interface abbreviation serial ports, also referred to as serial communication interface or serial communication interface (being often referred to com interface) are to use
The expansion interface of serial communication mode.Commissioning different manufacturers are needed to set because the serial ports line sequence of manufacturer is different in interchanger field
The standby Serial Port Line into the corresponding producer of selection brings big inconvenience to employee on business trip, maintenance personnel and commissioning staff in this way.If
Forget, with the Serial Port Line of corresponding producer, not logging in because of the difference of serial ports line sequence, cause the waste of human and material resources,
And the timeliness of debugging or repairing can be delayed.
Therefore based on problem above, it is necessary to provide a kind of methods of identification serial ports.
Invention content
In order to overcome drawbacks described above technical solution provided by the invention as follows：
The present invention provides a kind of recognition methods of serial ports line interface, including step：
Step S20：According to the interface type of the Serial Port Line of access, each pin of serial ports line interface is tentatively known
Not；
Step S30：To transmission (TXD)/reception (RXD) pin tentatively identified, obtains its level information and carry out again
Identification；
Step S41：When the level information of transmission (TXD)/reception (RXD) pin of acquisition is, a pin is high level,
When another pin is low level, then high level pin is identified as sending (TXD) pin, low level pin is then identified as receiving
(RXD) pin.
It is further preferred that further including step：
Step S10：Whether detection currently has Serial Port Line access.
It is further preferred that the step S10 includes step：
Step S11：A detection high level, when the level of ground path becomes low level, detection are provided to ground path
To currently having Serial Port Line access.
It is further preferred that the step S10 includes：
Step S12：Detection sends the level of (TXD)/reception (RXD) circuit, when in transmission (TXD)/reception (RXD) circuit
At least one line level when becoming high level, detect currently there is Serial Port Line access.
It is further preferred that further including step：
Step S50：According to the pin of the serial ports line interface identified, the signal conduction of Serial Port Line will be accessed.
Step S60：When detecting that Serial Port Line is extracted, Serial Port Line signal is cut off.
It is further preferred that further including：
Step S42：When the level information of transmission (TXD)/reception (RXD) pin of acquisition is, two pins are high electricity
Flat/or when being low level, then send out Serial Port Line access abnormality alarm.
The present invention also provides a kind of systems of serial ports line sequence recognition methods, which is characterized in that including：
First identification module, for the interface type according to the Serial Port Line of access, to each pin of serial ports line interface into
The preliminary identification of row；
Second identification module, transmission (TXD)/reception (RXD) pin for tentatively identifying, obtain its level information into
Row again identifies that；
Control module is electrically connected with first identification module, second identification module, is known for controlling described second
Other module accurately judges that first identification module identifies transmission (TXD)/reception (RXD) pin of the Serial Port Line.
It is further preferred that further including：
Communication detection module is electrically connected with the control module, and the control module is for judging that detection currently has serial ports
Whether line accesses.
It is further preferred that further including：
The communication detection module provides a detection high level, when the level of ground path becomes low electricity to ground path
Usually, detect currently there is Serial Port Line access.
It is further preferred that further including：
Alarm module is electrically connected with the control module, and the control module is used to judge the level of Serial Port Line to be detected
There is exception in information, is then abnormal when two pins are high level/or are low level, controls the alarm module and open
Dynamic alarm system.
Compared with prior art, the present invention provides a kind of recognition methods of serial ports line interface, can bring following at least one
Kind advantageous effect：
1. can be the line sequence for realizing fast automatic identification Serial Port Line, maintenance and debugging to professional bring prodigious side
Face preferably improves work efficiency；
2. avoiding the waste of human and material resources at work；
3. be staff work it is more intelligent, simplification, hommization.
Description of the drawings
Preferred embodiment, a kind of side of serial ports line sequence identification in a manner of clearly understandable, will be described with reference to the drawings below
Above-mentioned characteristic, technical characteristic, advantage and its realization method of method and system are further described.
Fig. 1 is a kind of schematic diagram of the method for serial ports line sequence identification of the present invention；
Fig. 2 is a kind of another schematic diagram of the method for serial ports line sequence identification of the present invention；
Fig. 3 is a kind of system construction drawing of serial ports line sequence identification of the present invention；
Fig. 4 is a kind of another structure chart of system of serial ports line sequence identification of the present invention；
Fig. 5 is a kind of software flow pattern of the method for serial ports line sequence identification of the present invention；
Fig. 6 is a kind of software architecture diagram of the method for serial ports line sequence identification of the present invention.
Drawing reference numeral explanation：
1. control module, 2. communication detection modules, 3. first identification modules, 4. second identification modules, 5. alarm modules.
Specific implementation mode
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, control is illustrated below
The specific implementation mode of the present invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented
Its practical structures as product.In addition, so that simplified form is easy to understand, there is identical structure or function in some figures
Component only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not only indicated
" only this ", can also indicate the situation of " more than one ".
In a kind of recognition methods embodiment of serial ports line interface of the present invention, referring to Fig.1, including it is as follows：
Step S20：According to the interface type of the Serial Port Line of access, each pin of serial ports line interface is tentatively known
Not；Step S30：To transmission (TXD)/reception (RXD) pin tentatively identified, obtains its level information and again identified that；
Step S41：When the level information of transmission (TXD)/reception (RXD) pin of acquisition is, a pin is high level, another draws
When foot is low level, then high level pin is identified as sending (TXD) pin, low level pin is then identified as reception (RXD) and draws
Foot.
Specifically, by taking 232 serial ports, 9 foot as an example, RS232 interface is to be joined by American Electronics Industry Association (EIA) for 1970
Close Bell System, the standard for serial communication that modem producer and terminal manufacturer formulate jointly.
RS-232C interfaces define (9 core)；Stitch defines symbol：
1 carrier wave detects DCD；2 receive data RXD；3 transmission data TXD；4 DTR DTR；5 signal ground SG；6
DSR DSR；7 requests send RTS；8 clear to send CTS；9 ringring prompting RI.
9 pins are identified first, tentatively judge line sequence；Due to common pin be 2 (TXD), 3 (RXD), 5 (GND) this
Three；2 (TXD), 3 (RXD) often obscure or sometimes for by line when being other debugging machines either interchanger communicates
Sequence is just connecing or reversal connection；So the present embodiment confirms two pins again according to level；If when detecting 2 in two pins
Number for high level be then confirmed as send pin (TXD)；It is then confirmed as No. 2 receiving pin (RXD) for low level.
The present invention also provides a kind of recognition methods of serial ports line interface, with reference to Fig. 2
Step S10：Whether detection currently has Serial Port Line access.Step S20：According to the interface type of the Serial Port Line of access,
Each pin of serial ports line interface is tentatively identified；Step S30：Transmission (TXD)/reception (RXD) to tentatively identifying
Pin obtains its level information and is again identified that；Step S41：When the level of transmission (TXD)/reception (RXD) pin of acquisition
Information is that a pin is high level, when another pin is low level, then high level pin is identified as transmission (TXD) and drawn
Foot, low level pin are then identified as receiving (RXD) pin.Step S50：According to the pin of the serial ports line interface identified, will connect
Enter the signal conduction of Serial Port Line.Step S60：When detecting that Serial Port Line is extracted, Serial Port Line signal is cut off.
Specifically, after completely confirming the pin of Serial Port Line well, access signal is normally worked, and detection is worked as
After, in order to which whether security risk cut-out Serial Port Line is found, cut off the communication connection between system to be debugged or exchange value.
Preferably, step S11：A detection high level is provided to ground path, when the level of ground path becomes low level
When, detect currently there is Serial Port Line access.
Preferably, step S12：Detection sends the level of (TXD)/reception (RXD) circuit, when transmission (TXD)/reception
(RXD) when at least one line level in circuit becomes high level, detect currently there is Serial Port Line access.
Specifically, in the case of normal communication, transmission/receiving terminal is an at least high level, as long as there is high level, you can
Confirmation has signal access certainly.
Preferably, further include：Step S42：When the level information of transmission (TXD)/reception (RXD) pin of acquisition is two
When a pin is high level/or is low level, then Serial Port Line access abnormality alarm is sent out.
Specifically, alarm technique is provided in the detection method, if being all low when to detect two pins all be high level
Level, this illustrates that exchange value or system to be debugged or Serial Port Line break down, in order to which product and working efficiency increase
Alarm detection techniques abnormal are alarmed at once once detecting.
The present invention provides a kind of system of serial ports line sequence recognition methods, with reference to Fig. 3, including：
First identification module 3, for the interface type according to the Serial Port Line of access, to each pin of serial ports line interface into
The preliminary identification of row；Second identification module 4, transmission (TXD)/reception (RXD) pin for tentatively identifying obtain its level letter
Breath is again identified that；Control module 1 is electrically connected with first identification module 3, second identification module 4, for controlling
Second identification module accurately judges that first identification module 3 identifies transmission (TXD)/reception of the Serial Port Line
(RXD) pin.
Specifically, equally by taking DB9 serial port line as an example；First identification module 3 refers on the connector at the both ends for identifying Serial Port Line
Each pin, primarily determines pin function；Then different according to the level, using the second identification module confirm transmitting terminal/
Receiving terminal correctly judges the transmission at both ends and receives pin.
The present invention also provides a kind of systems of serial ports line sequence recognition methods, with reference to Fig. 4, including：
First identification module 3, for the interface type according to the Serial Port Line of access, to each pin of serial ports line interface into
The preliminary identification of row；Second identification module 4, transmission (TXD)/reception (RXD) pin for tentatively identifying obtain its level letter
Breath is again identified that；Control module 1 is electrically connected with first identification module 3, second identification module 4, for controlling
Second identification module 4 accurately judges transmission (TXD)/reception that 3 pieces of first identification module identifies the Serial Port Line
(RXD) pin.Communication detection module 2 is electrically connected with the control module, and the control module is for judging that detection currently has string
Whether mouth line accesses.
Preferably, further include：The communication detection module 2 provides a detection high level to ground path, works as ground path
Level when becoming low level, detect currently there is Serial Port Line access.
Preferably, further include：Alarm module 5 is electrically connected with the control module 1, and the control module is waited for for judging
There is exception in the level information for detecting Serial Port Line, is then abnormal when two pins are high level/or are low level, controls
It makes the alarm module 5 and starts alarm system.
Specifically, the module needs to utilize software and combination of hardware, software program is embedded on hardware system, exception is worked as
When generation, in a voice form or just when form or it is that user is shown to illuminator or number etc., reminds abnormal
Occur.
This law also provides an embodiment, and with reference to figure 5, technical solution of the present invention elaborates.
The present invention is the software program that serial ports knows tool automatically, operates in the cpu chip SCT15W203 of 51 series, this journey
The working method of sequence：
(1) it powers on after completing self-test, having configured has correspondence between register and IO, control analog switch, and OE is arranged
For high level, it is made to be in the nonconducting state of high resistant；
(2) detect whether Serial Port Line has access switch equipment by I/O pin, if it is not, cycle waits for；If
Have, then executes next step；
(4) judge to be a kind of that serial ports interchanger of line sequence；
(5) analog switch is controlled, setting OE is low level, by the serial ports line sequence of the interchanger of corresponding types and the string of PC machine
Mouth is connected to by analog switch.
(6) whether detection Serial Port Line has disconnects with interchanger, if it is not, cycle waits for；If any then by analog switch
OE be set as high level, disconnect the connection of Serial Port Line and PC, then branch to step (2).
The present invention is the software program of serial ports type automatic identification tool, as follows with reference to 6 course of work of figure：
The carrier serial ports crossover tool of this program plugged to the DB9 serial port of computer, by drawing from DB9 on serial ports crossover tool
Power supply is obtained on foot, cpu chip starts power up, and program starts self-starting and configures good relevant register, then passes through reading
The value of I/O port is confirmed whether to be connected to interchanger confirm it is a kind of that interchanger serial ports of line sequence by comparing, control
Analog switch, the serial ports for making PC machine are communicated with the serial ports of interchanger, to complete the automatic identification function of interchanger serial ports.
It is to be with DB9 in above embodiment, is equally applicable to DB25.
RS-232C interfaces define (25 core) stitch and define symbol：
1 frequency covers ground wire；2 transmission data TXD；3 receive data RXD；4 requests send RTS；5 allow to send CTS；6 data are accurate
Get DSR ready；7 signal ground SG；8 carrier waves detect DCD；9 send return (+)；10 is undefined；11 data send (-)；12~17 is uncertain
Justice；Eighteen data receives (+)；19 is undefined；20 DTR DTR；21 is undefined；22 ring RI；23~24 is undefined；
25 receive return (-).
It should be noted that above-described embodiment can be freely combined as needed.The above is only the preferred of the present invention
Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, several improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of recognition methods of serial ports line interface, which is characterized in that including：
Step S20：According to the interface type of the Serial Port Line of access, each pin of serial ports line interface is tentatively identified；
Step S30：To transmission (TXD)/reception (RXD) pin tentatively identified, obtains its level information and again identified that；
Step S41：When the level information of transmission (TXD)/reception (RXD) pin of acquisition is, a pin is high level, another
When a pin is low level, then high level pin is identified as sending (TXD) pin, low level pin is then identified as receiving
(RXD) pin.
2. a kind of recognition methods of serial ports line interface as described in claim 1, which is characterized in that further include step：
Step S10：Whether detection currently has Serial Port Line access.
3. a kind of recognition methods of serial ports line interface as claimed in claim 2, which is characterized in that the step S10 includes：
Step S11：A detection high level is provided to ground path to detect and work as when the level of ground path becomes low level
Before have Serial Port Line access.
4. a kind of recognition methods of serial ports line interface as claimed in claim 2, which is characterized in that the step S10 includes：
Step S12：Detection send (TXD)/receive (RXD) circuit level, when in transmission (TXD)/reception (RXD) circuit extremely
When a few line level becomes high level, detect currently there is Serial Port Line access.
5. a kind of recognition methods of serial ports line interface as claimed in claim 2, which is characterized in that further include：
Step S50：According to the pin of the serial ports line interface identified, the signal conduction of Serial Port Line will be accessed；
Step S60：When detecting that Serial Port Line is extracted, Serial Port Line signal is cut off.
6. a kind of recognition methods of serial ports line interface as claimed in claim 5, which is characterized in that further include：
Step S42：When the level information of transmission (TXD)/reception (RXD) pin of acquisition is, two pins be high level/or
When being low level, then Serial Port Line access abnormality alarm is sent out.
7. a kind of serial ports line sequence identification applied to a kind of any recognition methods of serial ports line interface of claim 1-6 is
System, which is characterized in that including：
First identification module is used for the interface type of the Serial Port Line according to access, is carried out just to each pin of serial ports line interface
Step identification；
Second identification module, transmission (TXD)/reception (RXD) pin for tentatively identifying obtain its level information and carry out again
Secondary identification；
Control module is electrically connected with first identification module, second identification module, for controlling the second identification mould
Block accurately judges that first identification module identifies transmission (TXD)/reception (RXD) pin of the Serial Port Line.
8. a kind of system of serial ports line sequence identification as claimed in claim 7, which is characterized in that further include：
Communication detection module is electrically connected with the control module, and whether the control module is for judging the current Serial Port Line of detection
Access.
9. a kind of system of serial ports line sequence identification as claimed in claim 8, which is characterized in that further include：
The communication detection module provides a detection high level to ground path, when the level of ground path becomes low level,
Judgement currently has Serial Port Line access.
10. a kind of system of serial ports line sequence identification as claimed in claim 7, which is characterized in that further include：
Alarm module is electrically connected with the control module, and the control module is used to judge the level information of Serial Port Line to be detected
Whether there is exception, be then abnormal when two pins are high level/or are low level, controls the alarm module and open
Dynamic alarm system.
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| CN201610053017.2A CN105676052B (en) | 2016-01-26 | 2016-01-26 | A kind of method and system of serial ports line sequence identification |
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| CN108073481B (en) * | 2016-11-16 | 2021-02-12 | 佛山市顺德区顺达电脑厂有限公司 | Server system capable of providing hardware operation information and processing method thereof |
| CN110488138A (en) * | 2019-09-06 | 2019-11-22 | 中润油联天下网络科技有限公司 | A method of it is automatic quickly to determine equipment line sequence and data protocol |
| CN111007440A (en) * | 2019-11-22 | 2020-04-14 | 中国航发西安动力控制科技有限公司 | Method and device for determining correctness of multi-core bus line sequence |
| CN117609145B (en) * | 2024-01-24 | 2024-03-22 | 苏州元脑智能科技有限公司 | Serial port protection circuit, switch, server, protection method and related components |
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