CN104102512B - Embedded platform IO equipment dynamic identification system based on external interruption and IO equipment dynamic identification method of system - Google Patents
Embedded platform IO equipment dynamic identification system based on external interruption and IO equipment dynamic identification method of system Download PDFInfo
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Abstract
The invention discloses an embedded platform IO equipment dynamic identification system based on external interruption and an IO equipment dynamic identification method of the system, relates to the embedded platform IO equipment dynamic identification technology, and aims to solve the problem that the existing embedded platform IO equipment dynamic identification technology is low in universality. When IO equipment is inserted into a corresponding interface daughter board, the interface daughter board generates a corresponding identification signal, a identification module generates a corresponding interruption signal when the identification signal is transmitted to the identification module, a processor judges the category of the IO equipment according to the interruption signal and loads a corresponding drive program to allow a mainframe system to be able to communicate with the IO equipment. The system and the method have the advantages that electronic data table increasing of equipment is not needed, adding of storage devices for identification is not needed, equipment customization is not needed, interface physical structure modification of the equipment is not needed, various kinds of IO equipment can be identified, system universality is increased, and the system and the method are suitable for embedded platform IO equipment dynamic identification.
Description
Technical field
The present invention relates to embedded platform I/O device dynamic recognition technique.
Background technology
So-called Dynamic Recognition refers to that CPU can automatically obtain the information of insertion equipment when I/O device accesses goal systems
(the such as type of interface, relevant parameter) and correctly configure or driver is installed to reach the purpose of proper communication.Meanwhile,
After I/O device is extracted, CPU equally also can be notified, and unload driving or discharge related resource, to reduce resource overhead.
Existing CPU only supports that small part equipment can support Dynamic Recognition function (such as USB device), to other equipment
(such as RS232 interfaces) can not accomplish Dynamic Recognition.Current solution, be concentrated mainly on increases spreadsheet to equipment
Lattice, inevitably addition recognizes memory device used, wants equipment for customizing, or even needs the interface physical of reforming equipment to tie
Structure, versatility is not high.
The content of the invention
The invention aims to the I/O device dynamic recognition technique versatility for solving existing embedded platform is not high
Problem, there is provided the I/O device dynamic of a kind of embedded platform I/O device dynamic recognition system based on external interrupt and the system is known
Other method.
Embedded platform I/O device dynamic recognition system based on external interrupt of the present invention includes driving electricity by n
Interface circuit drive module, identification module, public physical interface and the daughter board mould that is made up of n interface daughter board that road is constituted
Block, n is the positive integer more than 1, and n interface daughter board corresponds to respectively n kind I/O devices, and n drive circuit corresponds to respectively n kinds IO and set
It is standby；
Each interface daughter board includes the circuit that can produce coding information, and the circuit is included and connect for connection standard
Mouthful physical slot and encoded signal outfan, the encoded signal outfan of the interface daughter board being connected with public physical interface is
The identification signal output part of daughter board module；
The identification signal output part of the daughter board module is defeated by the identification signal of public physical interface connect identification module
Enter end, the interrupt signal input of the processor of the interrupt signal outfan connection embedded platform of identification module, the processor
Pass sequentially through interface circuit drive module, public physical interface and daughter board module and I/O device carries out data transmission.
Described processor is embedded in the I/O device Dynamic Recognition module of software realization, and the I/O device Dynamic Recognition includes
With lower unit：
Dormancy unit：Processor in a dormant state, until receiving the interrupt signal that identification module is sent；And in the list
Start interrupt signal judging unit after first end of run；
Interrupt signal judging unit：Judge whether the interrupt signal that identification module is sent is effective interrupt signal, and
Judged result is starting device type inference unit when being, dormancy unit is started when judged result is no；
Described effective interrupt signal is the interrupt signal for pre-defining；
Device type recognition unit：It is inferred to what identification module was sent according to the mapping relations of interrupt signal and device type
Device type corresponding to interrupt signal；And after the unit end of run start interface drive program search unit；
Above-mentioned mapping relations are pre-set mapping relations, and in the mapping relations, different interrupt signal correspondences are not
Same device type；
Interface drive program search unit：Connecing corresponding to the interrupt signal that identification module is sent is searched in storage medium
Mouth driver；And after the unit end of run start interface drive program loading unit；
Interface drive program loading unit：Loading interface driver；And the startup configuration after the unit end of run
Pass signal transmitting element；
Configuration successful signal transmitting unit：Send configuration pass signal is to communication process；And the unit end of run it
Start dormancy unit afterwards.
The I/O device dynamic of the embedded platform I/O device dynamic recognition system based on external interrupt of the present invention is known
Other method is that described processor is embedded with the I/O device Dynamic Recognition process of software realization, and the process is comprised the following steps：
Sleep step：Processor in a dormant state, until receiving the interrupt signal that identification module is sent；And in the step
Suddenly interrupt signal is performed after terminating and judges step；
Interrupt signal judges step：Judge whether the interrupt signal that identification module is sent is effective interrupt signal, and
Judged result infers step to perform device type when being, returns when judged result is no and performs sleep step；
Described effective interrupt signal is the interrupt signal for pre-defining；
Device type identification step：It is inferred to what identification module was sent according to the mapping relations of interrupt signal and device type
Device type corresponding to interrupt signal；And after the step terminates perform interface drive program search step；
Above-mentioned mapping relations are pre-set mapping relations, and in the mapping relations, different interrupt signal correspondences are not
Same device type；
Interface drive program search step：Connecing corresponding to the interrupt signal that identification module is sent is searched in storage medium
Mouth driver；And after the step terminates perform interface drive program load step；
Interface drive program load step：Loading interface driver；And after the step terminates perform configuration successful
Signal forwarding step；
Configuration successful signal forwarding step：Send configuration pass signal is to communication process；And return after the step terminates
Receipt row sleep step.
Embedded platform I/O device dynamic recognition system based on external interrupt of the present invention, by host computer system
Hardware configuration be improved, when there is I/O device to insert on corresponding interface daughter board, interface daughter board produces corresponding identification letter
Number, the identification signal is sent to identification module, and identification module produces corresponding interrupt signal, and processor is according to the interrupt signal
Judge the species of I/O device, and load corresponding driver, enable host computer system to be communicated with I/O device.With it is existing
I/O device dynamic recognition technique is compared, and the present invention need not increase equipment electronic data sheet, need not add used by identification
Memory device, do not need equipment for customizing, more do not need the interface physical structure of reforming equipment, and be capable of identify that various IO set
It is standby, improve the versatility of system.
The I/O device dynamic identifying method of the above-mentioned embedded platform I/O device dynamic recognition system based on external interrupt, leads to
Cross and the interrupt signal that identification module is sent is judged, to determine the species of I/O device.The method is dynamic with existing I/O device
State technology of identification is compared, it is not necessary to is increased equipment electronic data sheet, need not be added identification memory device used, be not required to
Equipment for customizing is wanted, the interface physical structure of reforming equipment is not more needed, and is capable of identify that various I/O devices, improve the logical of system
The property used.
Description of the drawings
Fig. 1 is the principle of the embedded platform I/O device dynamic recognition system based on external interrupt described in embodiment one
Block diagram；
Fig. 2 is the embedded platform I/O device dynamic recognition system based on external interrupt described in embodiment three and four
Theory diagram；
Fig. 3 is that the I/O device of the embedded platform I/O device dynamic recognition system based on external interrupt of the present invention is moved
The flow chart of state recognition methodss.
Specific embodiment
Specific embodiment one：Illustrate present embodiment with reference to Fig. 1, described in present embodiment based on the embedding of external interrupt
Enter interface circuit drive module 1, identification module 2 that formula platform I/O device dynamic recognition system includes being made up of n drive circuit,
Public physical interface 3 and the daughter board module 4 being made up of n interface daughter board, n is the positive integer more than 1, and n interface daughter board divides
Not Dui Ying n kind I/O devices, n drive circuit correspond to respectively n kind I/O devices；
Each interface daughter board includes the circuit that can produce coding information, and the circuit is included and connect for connection standard
The physical slot and encoded signal outfan of mouth, the encoded signal outfan of the interface daughter board being connected with public physical interface 3
For the identification signal output part of daughter board module 4；
The identification identification signal of the signal output part by the connect identification module 2 of public physical interface 3 of the daughter board module 4
Input, the interrupt signal input of the processor of the interrupt signal outfan connection embedded platform of identification module 2, the process
Device passes sequentially through interface circuit drive module 1, public physical interface 3 and daughter board module 4 to carry out data transmission with I/O device.
As shown in figure 1, in present embodiment, between processor and interface circuit drive module 1 by send data wire and
Receiving data line this two holding wires link together.Identification module 2 is connected respectively to n of processor by n data lines
On I/O pin with interrupt function.The N roots holding wire of identification module 2 is connected with public physical interface 3,Know
The power line of other module 2 is connected with public physical interface 3.In interface circuit drive module 1, the common E of n drive circuitnRoot is defeated
Go out holding wire to be connected with public physical interface 3, wherein En=e1+e2+...+en, eiIt is the interface corresponding to i-th kind of I/O device
Physical connection line number amount, i=1,2 ... ..., n.Public physical slot is provided with public physical interface 3, with public affairs in interface daughter board
Altogether physical interface 3 can be joined directly together by above-mentioned physical slot, and connecting line is divided into three parts：Part I is the number for communication
According to line, effective draw pin of the public physical slot that distinct interface daughter board is used is different, and such as No. one interface daughter board is used
Be 1～No. 3 line therein, and No. two interface daughter boards use 2～No. 4 lines；Part II is the holding wire for identification,
What now each interface daughter board used that identical draw pin, i.e., No. one interface daughter board used to n interface daughter boards is all public
10～No. 13 lines of physical slot；Last part is power line, and equally, the power line of total interface daughter board is all using public
The identical line sequence of physical slot.Identification module 2 is powered by public physical interface 3 to interface daughter board.
In this embodiment party, the main completion system internal signal of interface circuit drive module 1 is to the electric of various interface signals
The conversion of standard and physical interface standards.Such as internal system only uses two holding wires (to send line as data telecommunication line
With reception line), three (RS485+, RS485-, GND) have been converted into through the drive circuit of RS485 interfaces, if through
The drive circuit of RS422 interfaces be then converted to five (RS422TXD+, RS422TXD-, RS422RXD+, RS422RXD-,
GND).Identification module 2 is used to be encoded the model of the interface equipment of insertion, and the coding is passed to into processor.It is public
Physical interface 3 includes the holding wire and the holding wire for data communication for identification, for connecting interface daughter board and correspondence
Drive circuit, and holding wire is assigned to into identification module 2.Interface daughter board is somebody's turn to do with the circuit for producing coding information
One end of circuit is the physical slot being connected with standard interface, and the other end is connected with public physical interface 3.It should be noted that same
One time, there can only be 1 interface daughter board to be connected with public physical interface 3.Processor module is also needed in addition to processing calculating task
Receive the signal of identification, and loading driver corresponding with insertion equipment.
The course of work of the embedded platform I/O device dynamic recognition system based on external interrupt described in present embodiment
It is as follows：First, I/O device is inserted into corresponding interface daughter board, then interface daughter board is connected with public physical interface 3.Now,
Daughter board module 4 can produce identification signal to identification module 2.Identification module 2 is encoded holding wire, while dragging down and processor
Connecting line in one.Processor produces interruption according to the holding wire for dragging down.Processor judges to insert according to different interrupt source
Enter the interface type of equipment, and the driver file for prestoring is loaded onto into internal memory.
Specific embodiment two：Present embodiment is to the embedded platform based on external interrupt described in embodiment one
The further restriction of I/O device dynamic recognition system, in present embodiment, described processor is embedded in the IO of software realization
Equipment Dynamic Recognition module, the I/O device Dynamic Recognition is included with lower unit：
Dormancy unit：Processor in a dormant state, until receiving the interrupt signal that identification module 2 is sent；And at this
Start interrupt signal judging unit after unit end of run；
Interrupt signal judging unit：Judge whether the interrupt signal that identification module 2 is sent is effective interrupt signal, and
Judged result is starting device type inference unit when being, dormancy unit is started when judged result is no；
Described effective interrupt signal is the interrupt signal for pre-defining；
Device type recognition unit：It is inferred to identification module 2 according to interrupt signal and the mapping relations of device type to send
Interrupt signal corresponding to device type；And after the unit end of run start interface drive program search unit；
Above-mentioned mapping relations are pre-set mapping relations, and in the mapping relations, different interrupt signal correspondences are not
Same device type；
Interface drive program search unit：Search in storage medium corresponding to the interrupt signal that identification module 2 is sent
Interface drive program；And after the unit end of run start interface drive program loading unit；
Interface drive program loading unit：Loading interface driver；And the startup configuration after the unit end of run
Pass signal transmitting element；
Configuration successful signal transmitting unit：Send configuration pass signal is to communication process；And the unit end of run it
Start dormancy unit afterwards.
Present embodiment needs to pre-define the interrupt signal corresponding to the various I/O devices being capable of identify that, these definition
Good interrupt signal is effective interrupt signal.When processor receives interrupt signal, judge that whether the interrupt signal is
Effective interrupt signal, if it is, can determine the various types of of the I/O device corresponding to the interrupt signal.
Specific embodiment three：Present embodiment is illustrated with reference to Fig. 2, present embodiment is to the base described in embodiment one
In the further restriction of the embedded platform I/O device dynamic recognition system of external interrupt, in present embodiment, described can
The circuit for producing coding information is realized using encoder.
As shown in Fig. 2 when interface daughter board is plugged into the slot of public physical interface 3, because power line is connected, interface
Encoder in plate is started working, and the outfan of encoder is connected with the N roots identification holding wire of public physical interface 3, now produces
Raw encoded signal.The encoded signal of the generation of different interface daughter boards is differed.
Specific embodiment four：Present embodiment is illustrated with reference to Fig. 2, present embodiment is to the base described in embodiment one
In the further restriction of the embedded platform I/O device dynamic recognition system of external interrupt, in present embodiment, described identification
Module 2 is realized using decoder.
As shown in Fig. 2 identification module 2 have received the change information of identification holding wire, the information is used as the defeated of decoder
Enter, now identification module 2 will drag down wherein one output signal line, and then produce I/O interrupt signal.
Specific embodiment five：With reference to Fig. 3 illustrate present embodiment, present embodiment be described in embodiment one based on
The I/O device dynamic identifying method of the embedded platform I/O device dynamic recognition system of external interrupt, the method is：Described place
Reason device is embedded with the I/O device Dynamic Recognition process of software realization, and the process is comprised the following steps：
Sleep step：Processor in a dormant state, until receiving the interrupt signal that identification module 2 is sent；And at this
Step performs interrupt signal and judges step after terminating；
Interrupt signal judges step：Judge whether the interrupt signal that identification module 2 is sent is effective interrupt signal, and
Judged result infers step to perform device type when being, returns when judged result is no and performs sleep step；
Described effective interrupt signal is the interrupt signal for pre-defining；
Device type identification step：It is inferred to identification module 2 according to interrupt signal and the mapping relations of device type to send
Interrupt signal corresponding to device type；And after the step terminates perform interface drive program search step；
Above-mentioned mapping relations are pre-set mapping relations, and in the mapping relations, different interrupt signal correspondences are not
Same device type；
Interface drive program search step：Search in storage medium corresponding to the interrupt signal that identification module 2 is sent
Interface drive program；And after the step terminates perform interface drive program load step；
Interface drive program load step：Loading interface driver；And after the step terminates perform configuration successful
Signal forwarding step；
Configuration successful signal forwarding step：Send configuration pass signal is to communication process；And return after the step terminates
Receipt row sleep step.
Present embodiment pre-builds the mapping relations of interrupt signal and I/O device, in the mapping relations, interrupt signal with
I/O device is corresponded, and when carrying out I/O device Dynamic Recognition, can be returned according to configuration file (data structures of storage mapping relations)
Return the ID identification informations of I/O device.As shown in figure 3, present embodiment in processor by loading I/O device Dynamic Recognition mistake
Journey, the I/O device Dynamic Recognition process can be judged the interrupt signal for receiving, with pre-set interrupt signal
Compare, if the interrupt signal is certain pre-set interrupt signal, then it is assumed that I/O device is the interrupt signal institute
The classification of corresponding I/O device, then loads the driver of this I/O device, host computer system is led to I/O device
Letter.Said method is compared with existing I/O device dynamic recognition technique, it is not necessary to increases equipment electronic data sheet, need
Addition recognizes memory device used, does not need equipment for customizing, does not more need the interface physical structure of reforming equipment, and can know
Not various I/O devices, improve the versatility of system.
Claims (4)
1. the embedded platform I/O device dynamic recognition system of external interrupt is based on, including the interface being made up of n drive circuit
Drives module (1), it also includes identification module (2), public physical interface (3) and the son being made up of n interface daughter board
Plate module (4), n is the positive integer more than 1, and n interface daughter board corresponds to respectively n kind I/O devices, and n drive circuit corresponds to respectively n
Plant I/O device；
Each interface daughter board includes the circuit that can produce coding information, and the circuit is included for connection standard interface
Physical slot and encoded signal outfan, the encoded signal outfan of the interface daughter board being connected with public physical interface (3) is
The identification signal output part of daughter board module (4)；
The identification signal output part of the daughter board module (4) is believed by the identification of public physical interface (3) connect identification module (2)
Number input, the interrupt signal input of the processor of the interrupt signal outfan connection embedded platform of identification module (2), should
Processor passes sequentially through interface circuit drive module (1), public physical interface (3) and daughter board module (4) and carries out with I/O device
Data transfer；
It is characterized in that：Described processor is embedded in the I/O device Dynamic Recognition module of software realization, the I/O device dynamic
Identification is included with lower unit：
Dormancy unit：Processor in a dormant state, until receiving the interrupt signal that identification module (2) is sent；And in the list
Start interrupt signal judging unit after first end of run；
Interrupt signal judging unit：Judge that whether the interrupt signal that identification module (2) is sent is effective interrupt signal, and sentencing
Disconnected result is starting device type inference unit when being, dormancy unit is started when judged result is no；
Described effective interrupt signal is the interrupt signal for pre-defining；
Device type recognition unit：It is inferred to what identification module (2) was sent according to the mapping relations of interrupt signal and device type
Device type corresponding to interrupt signal；And after the unit end of run start interface drive program search unit；
Above-mentioned mapping relations are pre-set mapping relations, and in the mapping relations, different interrupt signal correspondences is different
Device type；
Interface drive program search unit：Connecing corresponding to the interrupt signal that identification module (2) is sent is searched in storage medium
Mouth driver；And after the unit end of run start interface drive program loading unit；
Interface drive program loading unit：Loading interface driver；And start configuration successful after the unit end of run
Signal transmitting unit；
Configuration successful signal transmitting unit：Send configuration pass signal is to communication process；And open after the unit end of run
Dynamic dormancy unit.
2. the embedded platform I/O device dynamic recognition system based on external interrupt according to claim 1, its feature exists
In：The described circuit that can produce coding information is realized using encoder.
3. the embedded platform I/O device dynamic recognition system based on external interrupt according to claim 1, its feature exists
In：Described identification module (2) is realized using decoder.
4. the I/O device dynamic of the embedded platform I/O device dynamic recognition system based on external interrupt described in claim 1 is known
Other method, it is characterised in that：Described processor be embedded with software realization I/O device Dynamic Recognition process, the process include with
Lower step：
Sleep step：Processor in a dormant state, until receiving the interrupt signal that identification module (2) is sent；And in the step
Suddenly interrupt signal is performed after terminating and judges step；
Interrupt signal judges step：Judge that whether the interrupt signal that identification module (2) is sent is effective interrupt signal, and sentencing
Disconnected result infers step to perform device type when being, returns when judged result is no and performs sleep step；
Described effective interrupt signal is the interrupt signal for pre-defining；
Device type identification step：It is inferred to what identification module (2) was sent according to the mapping relations of interrupt signal and device type
Device type corresponding to interrupt signal；And after the step terminates perform interface drive program search step；
Above-mentioned mapping relations are pre-set mapping relations, and in the mapping relations, different interrupt signal correspondences is different
Device type；
Interface drive program search step：Connecing corresponding to the interrupt signal that identification module (2) is sent is searched in storage medium
Mouth driver；And after the step terminates perform interface drive program load step；
Interface drive program load step：Loading interface driver；And after the step terminates perform configuration successful signal
Forwarding step；
Configuration successful signal forwarding step：Send configuration pass signal is to communication process；And return after the step terminates and hold
Row sleep step.
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| CN107315695A (en) * | 2017-06-28 | 2017-11-03 | 浪潮金融信息技术有限公司 | Input and output driving method and device, computer-readable recording medium, terminal |
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| WO1996021974A1 (en) * | 1995-01-11 | 1996-07-18 | Aristocrat Leisure Industries Pty. Ltd. | Serial peripheral interface |
| CN1512335A (en) * | 2002-12-31 | 2004-07-14 | 北京科泰世纪科技有限公司 | Drive method based on structure operation system dynamic equipment |
| CN102122156A (en) * | 2010-12-24 | 2011-07-13 | 福州大学 | Novel I/O (Input/Output) bus |
-
2014
- 2014-07-17 CN CN201410340191.6A patent/CN104102512B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021974A1 (en) * | 1995-01-11 | 1996-07-18 | Aristocrat Leisure Industries Pty. Ltd. | Serial peripheral interface |
| CN1512335A (en) * | 2002-12-31 | 2004-07-14 | 北京科泰世纪科技有限公司 | Drive method based on structure operation system dynamic equipment |
| CN102122156A (en) * | 2010-12-24 | 2011-07-13 | 福州大学 | Novel I/O (Input/Output) bus |
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