CN106708762A - Unified management system and method for serial devices in LINUX - Google Patents
Unified management system and method for serial devices in LINUX Download PDFInfo
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- CN106708762A CN106708762A CN201510794209.4A CN201510794209A CN106708762A CN 106708762 A CN106708762 A CN 106708762A CN 201510794209 A CN201510794209 A CN 201510794209A CN 106708762 A CN106708762 A CN 106708762A
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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
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- 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
- G06F2213/0042—Universal serial bus [USB]
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Abstract
The invention discloses a unified management system and method for serial devices in LINUX. The system comprises a kernel space part and a user space part; serial resources are arranged in an operation system layer of the kernel space part; serial applications are arranged in an application layer of the user space part; a dynamic library layer is arranged between the operation system layer and the application layer; and the dynamic library layer is arranged in the user space part and comprises a serial management core module used for managing various serial devices and calling the corresponding serial resources to perform serial communication, and a registry module used for associating serial ID numbers and serial device nodes. According to the technical scheme, a universal interface is provided for an upper layer application, and the purposes of improving data interaction efficiency, lowering complexity of application programming and reducing serial business maintenance and management costs are achieved.
Description
Technical field
The present invention relates to the communications field, serial equipment system for unified management and method under more particularly to a kind of LINUX.
Background technology
Linux system has more and more been applied in vehicular applications field, and a Vehicle mounted station needs external multiple serial devices,
Such as fee register, LCD screen, LED screen, printer etc., if connect 2G modules to need to use pseudo-terminal, the data inside program
Interaction is likely to use pseudo-terminal, if connect 3G module and need to use USB turning serial ports, needs management multiple equivalent to Vehicle mounted station
Physics, virtual and extended serial port.If be managed respectively, either open up a receiving thread for each serial ports and hindered
The reception of plug property, or by periodic non-obstruction polling operation, the efficiency of data interaction is all than relatively low and increase application
The complexity of programming.
Meanwhile, physical serial interface has the exclusive characteristic and operator scheme of physical serial interface；Pseudo-terminal has the exclusive characteristic of pseudo-terminal and operation
Pattern；USB turns serial ports has USB to turn the exclusive characteristic and operator scheme of serial ports again, although application layer is using as being above
, but the interface that provides of system and usage it is each variant, it is necessary to application developer to the special interface of various serial ports using having
Compare deep understanding, reduce development efficiency, increase the cost of difficulty and serial ports the service maintenance management of exploitation.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, serial equipment system for unified management and side under a kind of LINUX are proposed
Method, realizes as upper layer application provides general interface, has reached the efficiency for improving data interaction, reduces the complexity of application programming
The purpose of degree and serial ports service maintenance management cost.
The technical solution adopted for the present invention to solve the technical problems is：
Serial equipment system for unified management under a kind of LINUX, including kernel spacing part and user's space part, serial port resource set
The operating system layer in kernel spacing part is put, serial ports application is arranged on the application layer of user's space part, in operating system
One dynamic base layer is set between layer and application layer, and dynamic base layer is arranged on user's space part, including：
Serial interface management nucleus module and registry module；
Registry module receives the registry entry of registration table interface unit offer and is registered, and the serial ports attribute information of registration includes
Serial ports ID, serial ports type identification, serial equipment path and reception buffer size.
Serial interface management nucleus module includes：
Application interface unit, for serial ports application provides unified interface；
Specifically, unified interface includes：Initialization interface, serial ports parameter setting interface and serial ports read-write interface, serial ports parameter
Setting including baud rate, start bit, stop position, even-odd check form etc. is set.
Registration table interface unit, there is provided registry entry, is registered for registry module, realizes serial ports ID and serial equipment
The mapping of node；
Buffer circle unit, the serial data that buffering is received waits user to read data；
Multiplexing switching administrative unit, there is provided to the multiplexing of serial ports descriptor；
Specifically, multiplexing uses select system functions, the function comprising it is maximum monitor descriptor, read descriptor set,
Descriptor set, error descriptor set and timer expiry time are write, serial ports is set opening when serial ports is initialized
Standby descriptor is added in multiplexing reading descriptor set；
Further, multiplexing unit is designed to thread, is hindered using all serial datas of select function pairs in thread
Plug is received, and when any one serial ports has data to come in, thread is waken up, and starts the reception of serial data.
Further, read to read descriptor comprising pipeline in descriptor set, the pipeline read descriptor system initialization when
Time is created and is added in reading descriptor set, as the event source that follow-up serial equipment descriptor is added, when any serial ports is opened,
To 1 message of byte is sent in pipeline as event events, multiplexing switching administrative unit is called by select and obtained
The event is taken, and then trigger event is processed, and the new serial equipment descriptor opened is added in reading descriptor set.
Specifically, serial port resource includes：Physical serial interface resource, USB turn serial port resource and pseudo-terminal serial port resource.
Specifically, serial ports application includes：Physical serial interface application, USB turn serial ports application and pseudo-terminal serial ports application.
Serial equipment Explore of Unified Management Ideas under a kind of LINUX, including：
Linux system is layered, dynamic base layer is increased in application layer and operating system layer；
Serial interface management nucleus module and registry module are set in dynamic base layer；
By the way that in registry module registration serial ports attribute information to registration table, the serial ports attribute information includes serial ports ID, string
Mouth type identification, serial equipment path and reception buffer size；
Multiplexing to serial ports descriptor is realized by the multiplexing administrative unit in serial interface management nucleus module；
Realize receiving the buffering of serial data by the buffer circle unit in serial interface management nucleus module；
By the application interface unit in serial interface management nucleus module for serial ports application provides unified interface；
Further, the multiplexing to serial ports descriptor is realized by the multiplexing administrative unit in serial interface management nucleus module
Including：
Using select system functions, the function comprising it is maximum monitor descriptor, read descriptor set, write descriptor set,
Error descriptor set and timer expiry time, serial equipment descriptor is added to opening when serial ports is initialized
Multiplexing is read in descriptor set；
Multiplexing unit is designed to thread, and barrage reception is carried out using all serial datas of select function pairs in thread, when
When any one serial ports has data to come in, thread is waken up, and starts the reception of serial data.
Read descriptor comprising a pipeline in descriptor set is read, the pipeline is read descriptor and created simultaneously when system initialization
It is added in reading descriptor set, as the event source that follow-up serial equipment descriptor is added, when any serial ports is opened, to pipeline
1 message of byte of middle transmission is called by select and obtains the thing as event events, multiplexing switching administrative unit
Part, and then trigger event treatment, the new serial equipment descriptor opened are added in reading descriptor set.
Further, included for serial ports application provides unified interface by the application interface unit in serial interface management nucleus module：
Initialization interface, serial ports parameter setting interface and serial ports read-write interface are provided, serial ports parameter setting includes baud rate, starting
The setting of position, stop position, even-odd check form etc..
The beneficial effect brought of technical scheme that the present invention is provided is：By increasing by one between operating system layer and application layer
Individual middleware layer, using multiplexing function select and user's space buffer circle, and by a thread to all strings
The realization of the technical scheme that the data receiver of mouth is managed so that serial ports ID and serial equipment descriptor are corresponded, and are
Upper layer application provides general interface, has reached the efficiency for improving data interaction, reduces the complexity and serial ports industry of application programming
The target of business maintenance management cost.
The present invention is described in further detail below in conjunction with drawings and Examples, but serial equipment under a kind of LINUX of the invention
System for unified management and method are not limited to embodiment.
Brief description of the drawings
Fig. 1 is the structural representation of present system embodiment；
Fig. 2 unifies reception processing flow chart for the serial data of the inventive method embodiment；
Fig. 3 unifies transmission processe flow chart for the serial data of the inventive method embodiment.
Specific embodiment
Referring to Fig. 1, serial equipment system for unified management under a kind of LINUX of the invention, including kernel spacing part and user's sky
Between part, serial port resource 11 is arranged on the operating system layer of kernel spacing part, and serial ports application 12 is arranged on user's space part
Application layer, dynamic base layer is set between operating system layer and application layer, it is empty that dynamic base layer is arranged on user
Between part, including serial interface management nucleus module 13 and registry module 14；
Registry module 14 receives the registry entry of the offer of registration table interface unit 132 and is registered, the serial ports attribute of registration
Information includes serial ports ID, serial ports type identification, serial equipment path and receives buffer size.
Serial interface management nucleus module 13 includes：
Multiplexing switching administrative unit 130, there is provided to the multiplexing of serial ports descriptor；
Buffer circle unit 131, the serial data that buffering is received waits user to read data；
Registration table interface unit 132, there is provided registry entry, is registered for registry module, realizes serial ports ID and serial ports
The mapping of device node；
Application interface unit 133, for serial ports application provides unified interface, including initialization interface, serial ports parameter setting interface
With serial ports read-write interface；
Specifically, multiplexing uses select system functions, the function comprising it is maximum monitor descriptor, read descriptor set,
Descriptor set, error descriptor set and timer expiry time are write, serial ports is set opening when serial ports is initialized
Standby descriptor is added in multiplexing reading descriptor set；
Further, multiplexing unit is designed to thread, is hindered using all serial datas of select function pairs in thread
Plug is received, and when any one serial ports has data to come in, thread is waken up, and starts the reception of serial data.
Further, read to read descriptor comprising pipeline in descriptor set, the pipeline read descriptor system initialization when
Time is created and is added in reading descriptor set, as the event source that follow-up serial equipment descriptor is added, when any serial ports is opened,
To 1 message of byte is sent in pipeline as event events, multiplexing switching administrative unit is called by select and obtained
The event is taken, and then trigger event is processed, and the new serial equipment descriptor opened is added in reading descriptor set.
Specifically, serial port resource includes：Physical serial interface resource, USB turn serial port resource and pseudo-terminal serial port resource.
Specifically, serial ports application includes：Physical serial interface application, USB turn serial ports application and pseudo-terminal serial ports application.
In the present embodiment, registry module collects serial ports attribute information, such as serial ports ID, serial ports type according to established form
Mark, serial equipment path and reception buffer size.
Specifically, including 4 physical serial interfaces, two USB turn serial ports, two pairs of pseudo-terminals, a pseudo-terminal main equipment and one
Pseudo-terminal slave unit constitutes a pseudo-terminal pair, and it is as shown in the table for registry module form：
These parameter informations are registered in registration table when system initialization, by serial ports ID it is known that correspondence string
The size of the type of jaws equipment, serial equipment path, and data receiver buffering area.
For physical serial interface, serial equipment is directly opened and set by device path, so the path registered here is string
The path of jaws equipment node；
Turn serial ports for USB, serial ports ID is needed by USB property parameters with plugging can change every time when opening every time,
Obtain USB and turn the device node path of serial ports, so the path registered here is USB turning the physical attribute path of serial ports；
For pseudo-terminal main equipment, open all use identical device node path every time, so it is fixed as/dev/ptmx；
For pseudo-terminal slave unit, corresponding pseudo-terminal main equipment is depended on forever, so the filling of its device path is it
The serial ports ID that correspondence pseudo-terminal main equipment is mapped.
In the present embodiment, the unified management of variety classes serial equipment is realized so that application layer need not pay close attention to the physics of serial ports
Type, all serial equipments are a difference for serial ports ID for application layer.
By serial ports, No. ID carries out applying the process of interaction as follows：
, by No. ID request initialization serial ports of serial ports, dynamic base floor is according to the incoming serial ports ID of application program in note for application program
Searched in volume table to the type of serial equipment of serial ports ID, serial equipment routing information and buffer size should be received；
Dynamic base layer carries out serial ports according to the attribute of serial equipment with the system call interfaces of the routing information corresponding serial equipment of operation
The opening of equipment, Configuration of baud rate, check bit are set and buffer size is set；
The descriptor of dynamic base floor binding serial ports ID and opening serial equipment, specifically, when serial equipment is opened, by open
System call association serial equipment path and serial equipment descriptor, due to registration when serial ports ID and string
Jaws equipment path associates, therefore forms No. ID and correspondence serial equipment descriptor one-to-one corresponding of serial ports；
It is managed collectively during serial equipment descriptor set is brought into multiplexing management module；
The transmitting-receiving of follow-up data can be carried out by the descriptor of serial equipment.
Based on the real-time serial data reception processing flow of serial equipment Explore of Unified Management Ideas under a kind of LINUX of the invention, referring to
Fig. 2, comprises the following steps:
Step 201：Set up pipeline；
Specifically, initialization dynamic base, Anonymous Pipes are created when dynamic base starts.
Step 202：Start receiving thread；
Specifically, dynamic base is created and starts serial data receiving thread when starting.
Step 203：Initialize the reading descriptor set of select；
Step 204：In data receiver thread, by the reading descriptor set that descriptor mark adds select of reading of pipeline；
Step 205：The serial equipment descriptor opened is added in select reading descriptor sets；
Specifically, all kinds of serial ports having already turned on are checked for during initialization, if then the serial equipment descriptor is added
Enter the reading descriptor set to select.
Step 206：Call select to carry out the obstruction without time-out to wait；
Step 207：Judge whether pipeline has event；
Specifically, after select is returned, checking pipeline event, if pipeline has event, illustrate that some or multiple serial ports set
It is standby to be opened, implementation steps 208；If it did not, implementation steps 209；
Step 208：Read functions are called to read pipeline event；
Specifically, needing in real time to be added in the reading descriptor set of select the serial equipment descriptor opened, return to
Step 203 is performed.
Step 209：Poll serial equipment descriptor checks whether that serial ports has data；
Step 210：Judge whether the poll of completion serial equipment descriptor；
If specifically, having completed the detection of all serial equipment descriptors, return to step 203；Otherwise, implementation steps 211.
Step 211：Judge whether serial ports there are data；
Specifically, whether judge serial equipment descriptor of this detection has data, if without data, return to step 210,
Continue to detect other serial equipment descriptors；If data, implementation steps 212.
Step 212：Read serial data and write data into buffer circle；
Specifically, after serial data is written to buffer circle, return to step 210.
Based on the real-time serial data transmission processe flow of serial equipment Explore of Unified Management Ideas under a kind of LINUX of the invention, referring to
Fig. 3, comprises the following steps:
Step 301：Application requests send data；
Step 302：Dynamic base floor is found to should the serial equipment descriptor of No. ID according to incoming serial ports ID；
Step 303：Data operating system layer is submitted to using system function write by serial equipment descriptor to send.
The beneficial effect brought of technical scheme that the present invention is provided is：By increasing by one between operating system layer and application layer
Individual middleware layer, using multiplexing function select and user's space buffer circle, and by a thread to all strings
The realization of the technical scheme that the data receiver of mouth is managed so that serial ports ID and serial equipment descriptor are corresponded, and are
Upper layer application provides general interface, has reached the efficiency for improving data interaction, reduces the complexity and serial ports industry of application programming
The target of business maintenance management cost.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of serial equipment system for unified management under LINUX, including kernel spacing part and user's space part, serial ports money
Source is arranged on the operating system layer of kernel spacing part, and serial ports application is arranged on the application layer of user's space part, its feature
It is：One dynamic base layer is set between the operating system layer and application layer, and it is empty that the dynamic base layer is arranged on user
Between part, including：
Serial interface management nucleus module and registry module；
The registry module receives the registry entry of registration table interface unit offer and is registered, the serial ports attribute information of registration
Including serial ports ID, serial ports type identification, serial equipment path and reception buffer size；
The serial interface management nucleus module includes：
Application interface unit, for serial ports application provides unified interface；
Registration table interface unit, there is provided registry entry, is registered for registry module, realizes serial ports ID and serial equipment
The mapping of node；
Buffer circle unit, the serial data that buffering is received waits user to read data；
Multiplexing switching administrative unit, there is provided to the multiplexing of serial equipment descriptor.
2. serial equipment system for unified management under LINUX according to claim 1, it is characterised in that：
The multiplexing uses select system functions, the function to monitor descriptor, the set of reading descriptor comprising maximum, write
Descriptor set, error descriptor set and timer expiry time, opening when serial ports is initialized serial equipment
Descriptor is added in multiplexing reading descriptor set；
The multiplexing unit is designed to thread, and barrage reception is carried out using all serial datas of select function pairs in thread,
When any one serial ports has data to come in, thread is waken up, and starts the reception of serial data；
Read descriptor comprising a pipeline in the reading descriptor set, the pipeline is read descriptor and created when system initialization
And be added in reading descriptor set, as the event source that follow-up serial equipment descriptor is added, when any serial ports is opened, Xiang Guan
1 message of byte is sent in road as event events, multiplexing switching administrative unit calls acquisition to be somebody's turn to do by select
Event, and then trigger event treatment, the new serial equipment descriptor opened are added in reading descriptor set.
3. serial equipment system for unified management under LINUX according to claim 1, it is characterised in that described is serial ports
Include using the interface for providing unified：Initialization interface, serial ports parameter setting interface and serial ports read-write interface.
4. serial equipment system for unified management under LINUX according to claim 1, it is characterised in that the serial ports money
Source includes：Physical serial interface resource, USB turn serial port resource and pseudo-terminal serial port resource.
5. serial equipment system for unified management under LINUX according to claim 1, it is characterised in that the serial ports should
With including：Physical serial interface application, USB turn serial ports application and pseudo-terminal serial ports application.
6. serial equipment Explore of Unified Management Ideas under a kind of LINUX, it is characterised in that including：
Linux system is layered, dynamic base layer is increased in application layer and operating system layer；
Serial interface management nucleus module and registry module are set in dynamic base layer；
By the way that in registry module registration serial ports attribute information to registration table, the serial ports attribute information includes serial ports ID, string
Mouth type identification, serial equipment path and reception buffer size；
Multiplexing to serial ports descriptor is realized by the multiplexing administrative unit in serial interface management nucleus module；
Realize receiving the buffering of serial data by the buffer circle unit in serial interface management nucleus module；
By the application interface unit in serial interface management nucleus module for serial ports application provides unified interface.
7. serial equipment Explore of Unified Management Ideas under LINUX according to claim 6, it is characterised in that by serial ports pipe
Multiplexing administrative unit in reason nucleus module is realized including the multiplexing of serial ports descriptor：
Using select system functions, the function comprising it is maximum monitor descriptor, read descriptor set, write descriptor set,
Error descriptor set and timer expiry time, serial equipment descriptor is added to opening when serial ports is initialized
Multiplexing is read in descriptor set；
Multiplexing unit is designed to thread, and barrage reception is carried out using all serial datas of select function pairs in thread, when
When any one serial ports has data to come in, thread is waken up, and starts the reception of serial data；
Read descriptor comprising a pipeline in descriptor set is read, the pipeline is read descriptor and created simultaneously when system initialization
It is added in reading descriptor set, as the event source that follow-up serial equipment descriptor is added, when any serial ports is opened, to pipeline
1 message of byte of middle transmission is called by select and obtains the thing as event events, multiplexing switching administrative unit
Part, and then trigger event treatment, the new serial equipment descriptor opened are added in reading descriptor set.
8. serial equipment Explore of Unified Management Ideas under LINUX according to claim 6, it is characterised in that described by string
Application interface unit in mouth higher management module includes for serial ports application provides unified interface：
Initialization interface, serial ports parameter setting interface and serial ports read-write interface are provided.
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| CN201510794209.4A CN106708762B (en) | 2015-11-18 | 2015-11-18 | unified management system and method for serial port equipment under LINUX |
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Cited By (10)
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| CN107329916A (en) * | 2017-06-13 | 2017-11-07 | 北京深之度科技有限公司 | A kind of USB device control method, device and computing device |
| CN108255542A (en) * | 2018-01-05 | 2018-07-06 | 北京北信源信息安全技术有限公司 | The serial ports parallel port management-control method and device of a kind of virtual machine |
| CN109491878A (en) * | 2018-09-26 | 2019-03-19 | 深圳市吉祥腾达科技有限公司 | A method of equipment of serial Log is acquired by USB flash disk |
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| CN107329916B (en) * | 2017-06-13 | 2019-06-04 | 北京深之度科技有限公司 | A kind of USB device control method, device and calculate equipment |
| CN107329916A (en) * | 2017-06-13 | 2017-11-07 | 北京深之度科技有限公司 | A kind of USB device control method, device and computing device |
| CN108255542A (en) * | 2018-01-05 | 2018-07-06 | 北京北信源信息安全技术有限公司 | The serial ports parallel port management-control method and device of a kind of virtual machine |
| CN109491878A (en) * | 2018-09-26 | 2019-03-19 | 深圳市吉祥腾达科技有限公司 | A method of equipment of serial Log is acquired by USB flash disk |
| CN109783417B (en) * | 2019-01-11 | 2022-03-15 | 四川长虹电器股份有限公司 | Serial port communication device and method |
| CN109783417A (en) * | 2019-01-11 | 2019-05-21 | 四川长虹电器股份有限公司 | A kind of serial communication device and method |
| CN110244983A (en) * | 2019-05-30 | 2019-09-17 | 百富计算机技术（深圳）有限公司 | Method, terminal device and the storage medium of fixed serial port |
| CN110244983B (en) * | 2019-05-30 | 2022-04-12 | 百富计算机技术（深圳）有限公司 | Method for fixing serial port number, terminal equipment and storage medium |
| CN110795375A (en) * | 2019-10-31 | 2020-02-14 | 浪潮金融信息技术有限公司 | Communication method for operating serial port and HID peripheral based on linux |
| CN111371869A (en) * | 2020-02-26 | 2020-07-03 | 山西鲲博时代信息科技有限公司 | Multi-channel communication monitoring method based on intelligent multi-channel gateway |
| CN111416778A (en) * | 2020-03-16 | 2020-07-14 | 南京荣泰电气自动化有限公司 | Single serial port gateway platform for multi-device Internet of things |
| CN113347025A (en) * | 2021-05-20 | 2021-09-03 | 上海上讯信息技术股份有限公司 | Method and device for operation and maintenance serial port device |
| CN116610467A (en) * | 2023-07-21 | 2023-08-18 | 烟台东方威思顿电气有限公司 | Energy controller serial port management method |
| CN116610467B (en) * | 2023-07-21 | 2023-10-20 | 烟台东方威思顿电气有限公司 | Energy controller serial port management method |
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