CN104102512A - 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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- CN104102512A CN104102512A CN201410340191.6A CN201410340191A CN104102512A CN 104102512 A CN104102512 A CN 104102512A CN 201410340191 A CN201410340191 A CN 201410340191A CN 104102512 A CN104102512 A CN 104102512A
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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 IO equipment dynamic recognition technique.
Background technology
So-called Dynamic Recognition refers to when IO equipment access goal systems, CPU can automatically obtain the information (as type, the correlation parameter etc. of interface) of interventional instrument and correctly configure or install driver to reach the object of proper communication.Meanwhile, after IO equipment is extracted, CPU equally also can be notified, and unloading drives or release related resource, to reduce resource overhead.
Existing CPU only supports small part equipment can support Dynamic Recognition function (as USB device), can not accomplish Dynamic Recognition to other equipment (as RS232 interface).Current solution, mainly concentrates on equipment is increased to electronic data sheet, inevitably adds identification memory device used, wants equipment for customizing, even needs the interface physical arrangement of reforming equipment, and versatility is not high.
Summary of the invention
The object of the invention is the not high problem of IO equipment dynamic recognition technique versatility in order to solve existing embedded platform, a kind of embedded platform IO equipment dynamic recognition system based on external interrupt and the IO equipment dynamic identifying method of this system are provided.
Embedded platform IO equipment dynamic recognition system based on external interrupt of the present invention comprises interface circuit driver module, identification module, the public physical interface being made up of n driving circuit and the daughter board module being made up of n interface daughter board, n is greater than 1 positive integer, n interface daughter board corresponding n kind IO equipment respectively, n driving circuit corresponding n kind IO equipment respectively;
Each interface daughter board includes the circuit that can produce coded message, this circuit includes for the physical slot of connection standard interface and coded signal output terminal, and the coded signal output terminal of the interface daughter board being connected with public physical interface is the identification signal output terminal of daughter board module;
The identification signal output terminal of described daughter board module is by the identification signal input end of public physical interface linkage identification module, the look-at-me output terminal of identification module connects the look-at-me input end of the processor of embedded platform, and this processor carries out data transmission by interface circuit driver module, public physical interface and daughter board module and IO equipment successively.
Described processor is embedded in the IO equipment Dynamic Recognition module that software is realized, and this IO equipment Dynamic Recognition comprises with lower unit:
Dormancy unit: processor is in dormant state, until receive the look-at-me that identification module is sent; And start look-at-me judging unit after this unit end of run;
Look-at-me judging unit: judge whether the look-at-me that identification module is sent is effective look-at-me, and in judged result starting outfit type inference unit when being, judged result starts dormancy unit while being no;
Described effective look-at-me is the look-at-me pre-defining;
Device type recognition unit: infer the corresponding device type of look-at-me that identification module is sent according to the mapping relations of look-at-me and device type; And start interface drive program search unit after this unit end of run;
Above-mentioned mapping relations are pre-set mapping relations, in these mapping relations, and different device type corresponding to look-at-me;
Interface drive program search unit: search for the corresponding interface drive program of look-at-me that identification module is sent in storage medium; And start interface drive program loading unit after this unit end of run;
Interface drive program loading unit: loading interface driver; And start configuration successful signal transmitting unit after this unit end of run;
Configuration successful signal transmitting unit: send configuration successful signal to communication process; And start dormancy unit after this unit end of run.
The IO equipment dynamic identifying method of the embedded platform IO equipment dynamic recognition system based on external interrupt of the present invention is, described processor embeds the IO equipment Dynamic Recognition process that has software to realize, and this process comprises the following steps:
Sleep step: processor is in dormant state, until receive the look-at-me that identification module is sent; And after finishing, this step carries out look-at-me determining step;
Look-at-me determining step: judge whether the look-at-me that identification module is sent is effective look-at-me, and in judged result actuating equipment type inference step when being, return to execution sleep step when judged result is no;
Described effective look-at-me is the look-at-me pre-defining;
Device type identification step: infer the corresponding device type of look-at-me that identification module is sent according to the mapping relations of look-at-me and device type; And finish executive's interface driver search step afterwards in this step;
Above-mentioned mapping relations are pre-set mapping relations, in these mapping relations, and different device type corresponding to look-at-me;
Interface drive program search step: search for the corresponding interface drive program of look-at-me that identification module is sent in storage medium; And finish executive's interface driver load step afterwards in this step;
Interface drive program load step: loading interface driver; And after finishing, this step carries out configuration successful signal forwarding step;
Configuration successful signal forwarding step: send configuration successful signal to communication process; And after finishing, this step returns to execution sleep step.
Embedded platform IO equipment dynamic recognition system based on external interrupt of the present invention, improve by the hardware configuration to host computer system, in the time having IO equipment to insert on corresponding interface daughter board, interface daughter board produces corresponding identification signal, this identification signal is sent to after identification module, and identification module produces corresponding look-at-me, and processor judges the kind of IO equipment according to this look-at-me, and load corresponding driver, host computer system can be communicated with IO equipment.Compared with existing IO equipment dynamic recognition technique, the present invention does not need equipment to increase electronic data sheet, do not need to add identification memory device used, do not need equipment for customizing, more do not need the interface physical arrangement of reforming equipment, and can identify multiple IO equipment, improve the versatility of system.
The IO equipment dynamic identifying method of the above-mentioned embedded platform IO equipment dynamic recognition system based on external interrupt, judges by the look-at-me that identification module is sent, to determine the kind of IO equipment.The method is compared with existing IO equipment dynamic recognition technique, not needing increases electronic data sheet, does not need to add identification memory device used, does not need equipment for customizing equipment, more do not need the interface physical arrangement of reforming equipment, and can identify multiple IO equipment, improve the versatility of system.
Brief description of the drawings
Fig. 1 is the theory diagram of the embedded platform IO equipment dynamic recognition system based on external interrupt described in embodiment one;
Fig. 2 is the theory diagram of the embedded platform IO equipment dynamic recognition system based on external interrupt described in embodiment three and four;
Fig. 3 is the process flow diagram of the IO equipment dynamic identifying method of the embedded platform IO equipment dynamic recognition system based on external interrupt of the present invention.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, the embedded platform IO equipment dynamic recognition system based on external interrupt described in present embodiment comprises interface circuit driver module 1, identification module 2, the public physical interface 3 being made up of n driving circuit and the daughter board module 4 being made up of n interface daughter board, n is greater than 1 positive integer, n interface daughter board corresponding n kind IO equipment respectively, n driving circuit corresponding n kind IO equipment respectively;
Each interface daughter board includes the circuit that can produce coded message, this circuit includes for the physical slot of connection standard interface and coded signal output terminal, and the coded signal output terminal of the interface daughter board being connected with public physical interface 3 is the identification signal output terminal of daughter board module 4;
The identification signal output terminal of described daughter board module 4 is by the identification signal input end of public physical interface 3 linkage identification modules 2, the look-at-me output terminal of identification module 2 connects the look-at-me input end of the processor of embedded platform, and this processor carries out data transmission by interface circuit driver module 1, public physical interface 3 and daughter board module 4 with IO equipment successively.
As shown in Figure 1, in present embodiment, between processor and interface circuit driver module 1, link together by sending data line and receiving these two signal wires of data line.The n that identification module 2 is connected respectively to processor by n data lines has on the IO pin of interrupt function.The N root signal wire of identification module 2 is connected with public physical interface 3,
the power lead of identification module 2 is connected with public physical interface 3.In interface circuit driver module 1, the common E of n driving circuit
nroot output signal line is connected with public physical interface 3, wherein E
n=e
1+ e
2+ ...+e
n, e
ifor the physical connection line quantity of the interface corresponding to i kind IO equipment, i=1,2 ..., n.On public physical interface 3, be provided with public physical slot, in interface daughter board, can directly be connected by above-mentioned physical slot with public physical interface 3, connecting line is divided into three parts: Part I is the data line for communicating by letter, the pin that effectively draws of the public physical slot that distinct interface daughter board uses is different, for example an interface daughter board use is 1～No. 3 line wherein, and No. two interface daughter board uses is 2～No. 4 lines; Part II is the signal wire for identifying, and what now each interface daughter board used is the identical pin that draws, and interface daughter board is all 10～No. 13 lines of public physical slot to the use of n interface daughter board; Last part is power lead, same, and the power lead of total interface daughter board is all the same line order that uses public physical slot.Identification module 2 is powered to interface daughter board by public physical interface 3.
In this enforcement side, the main completion system internal signal of interface circuit driver module 1 is to the electrical standard of various interface signal and the conversion of physical interface standard.For example internal system is only used two signal wires as data telecommunication line (send line and receive line), driving circuit through RS485 interface has just converted three (RS485+, RS485-, GND) to, if converted five (RS422TXD+, RS422TXD-, RS422RXD+, RS422RXD-, GND) to through the driving circuit of RS422 interface.Identification module 2 is for the model of the interfacing equipment of insertion is encoded, and this coding is passed to processor.Public physical interface 3 includes signal wire for identifying and the signal wire for data communication, is used for connecting interface daughter board and corresponding driving circuit, and signal wire is assigned to identification module 2.Interface daughter board is with producing the circuit of coded message, and one end of this 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 the same time, can only have 1 interface daughter board to be connected with public physical interface 3.Processor module, except processing calculation task, also needs to receive the signal of identification, and the loading driver corresponding with interventional instrument.
The course of work of the embedded platform IO equipment dynamic recognition system based on external interrupt described in present embodiment is as follows: first, IO equipment is inserted to 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 signal wire, drag down simultaneously with the connecting line of processor in one.Processor produces and interrupts according to the signal wire dragging down.Processor, according to different interrupt source, judges the interface type of interventional instrument, and pre-stored driver file is loaded on to internal memory.
Embodiment two: present embodiment is the further restriction to the embedded platform IO equipment dynamic recognition system based on external interrupt described in embodiment one, in present embodiment, described processor is embedded in the IO equipment Dynamic Recognition module that software is realized, and this IO equipment Dynamic Recognition comprises with lower unit:
Dormancy unit: processor is in dormant state, until receive the look-at-me that identification module 2 is sent; And start look-at-me judging unit after this unit end of run;
Look-at-me judging unit: judge whether the look-at-me that identification module 2 is sent is effective look-at-me, and in judged result starting outfit type inference unit when being, judged result starts dormancy unit while being no;
Described effective look-at-me is the look-at-me pre-defining;
Device type recognition unit: infer the corresponding device type of look-at-me that identification module 2 is sent according to the mapping relations of look-at-me and device type; And start interface drive program search unit after this unit end of run;
Above-mentioned mapping relations are pre-set mapping relations, in these mapping relations, and different device type corresponding to look-at-me;
Interface drive program search unit: search for the corresponding interface drive program of look-at-me that identification module 2 is sent in storage medium; And start interface drive program loading unit after this unit end of run;
Interface drive program loading unit: loading interface driver; And start configuration successful signal transmitting unit after this unit end of run;
Configuration successful signal transmitting unit: send configuration successful signal to communication process; And start dormancy unit after this unit end of run.
Present embodiment need to pre-define the corresponding look-at-me of various IO equipment that can identify, and these look-at-mes that define are effective look-at-me.In the time that processor receives look-at-me, judge that whether this look-at-me is effective look-at-me, if so, can determine the various types of of the corresponding IO equipment of this look-at-me.
Embodiment three: present embodiment is described in conjunction with Fig. 2, present embodiment is the further restriction to the embedded platform IO equipment dynamic recognition system based on external interrupt described in embodiment one, in present embodiment, the described circuit that can produce coded message adopts scrambler to realize.
As shown in Figure 2, when interface daughter board is plugged to the slot of public physical interface 3, because power lead is connected, the scrambler in interface daughter board is started working, and the output terminal of scrambler is connected with the N root identification signal line of public physical interface 3, now produces coded signal.The coded signal of the generation of different interface daughter boards is not identical.
Embodiment four: present embodiment is described in conjunction with Fig. 2, present embodiment is the further restriction to the embedded platform IO equipment dynamic recognition system based on external interrupt described in embodiment one, in present embodiment, described identification module 2 adopts code translator to realize.
As shown in Figure 2, identification module 2 has received the change information of identification signal line, and this information is as the input of code translator, and now identification module 2 will drag down a wherein output signal line, and then produces IO look-at-me.
Embodiment five: present embodiment is described in conjunction with Fig. 3, present embodiment is the IO equipment dynamic identifying method of the embedded platform IO equipment dynamic recognition system based on external interrupt described in embodiment one, the method is: described processor embeds the IO equipment Dynamic Recognition process that has software to realize, and this process comprises the following steps:
Sleep step: processor is in dormant state, until receive the look-at-me that identification module 2 is sent; And after finishing, this step carries out look-at-me determining step;
Look-at-me determining step: judge whether the look-at-me that identification module 2 is sent is effective look-at-me, and in judged result actuating equipment type inference step when being, return to execution sleep step when judged result is no;
Described effective look-at-me is the look-at-me pre-defining;
Device type identification step: infer the corresponding device type of look-at-me that identification module 2 is sent according to the mapping relations of look-at-me and device type; And finish executive's interface driver search step afterwards in this step;
Above-mentioned mapping relations are pre-set mapping relations, in these mapping relations, and different device type corresponding to look-at-me;
Interface drive program search step: search for the corresponding interface drive program of look-at-me that identification module 2 is sent in storage medium; And finish executive's interface driver load step afterwards in this step;
Interface drive program load step: loading interface driver; And after finishing, this step carries out configuration successful signal forwarding step;
Configuration successful signal forwarding step: send configuration successful signal to communication process; And after finishing, this step returns to execution sleep step.
Present embodiment is set up the mapping relations of look-at-me and IO equipment in advance, in these mapping relations, look-at-me is corresponding one by one with IO equipment, while carrying out IO equipment Dynamic Recognition, can return to according to configuration file (depositing the data structure of mapping relations) the ID identification information of IO equipment.As shown in Figure 3, present embodiment by loading IO equipment Dynamic Recognition process in processor, this IO equipment Dynamic Recognition process can judge the look-at-me receiving, compare with pre-set look-at-me, if this look-at-me is certain pre-set look-at-me, think that IO equipment is the classification of the corresponding IO equipment of this look-at-me, then load the driver of this IO equipment, host computer system can be communicated with IO equipment.Said method is compared with existing IO equipment dynamic recognition technique, not needing increases electronic data sheet, does not need to add identification memory device used, does not need equipment for customizing equipment, more do not need the interface physical arrangement of reforming equipment, and can identify multiple IO equipment, improve the versatility of system.
Claims (5)
1. the embedded platform IO equipment dynamic recognition system based on external interrupt, comprise the interface circuit driver module (1) being formed by n driving circuit, it is characterized in that: it also comprises identification module (2), public physical interface (3) and the daughter board module (4) being made up of n interface daughter board, n is greater than 1 positive integer, n interface daughter board corresponding n kind IO equipment respectively, n driving circuit corresponding n kind IO equipment respectively;
Each interface daughter board includes the circuit that can produce coded message, this circuit includes for the physical slot of connection standard interface and coded signal output terminal, and the coded signal output terminal of the interface daughter board being connected with public physical interface (3) is the identification signal output terminal of daughter board module (4);
The identification signal output terminal of described daughter board module (4) is by the identification signal input end of public physical interface (3) linkage identification module (2), the look-at-me output terminal of identification module (2) connects the look-at-me input end of the processor of embedded platform, and this processor carries out data transmission by interface circuit driver module (1), public physical interface (3) and daughter board module (4) and IO equipment successively.
2. the embedded platform IO equipment dynamic recognition system based on external interrupt according to claim 1, is characterized in that: described processor is embedded in the IO equipment Dynamic Recognition module that software is realized, and this IO equipment Dynamic Recognition comprises with lower unit:
Dormancy unit: processor is in dormant state, until receive the look-at-me that identification module (2) is sent; And start look-at-me judging unit after this unit end of run;
Look-at-me judging unit: judge whether the look-at-me that identification module (2) is sent is effective look-at-me, and in judged result starting outfit type inference unit when being, judged result starts dormancy unit while being no;
Described effective look-at-me is the look-at-me pre-defining;
Device type recognition unit: infer the corresponding device type of look-at-me that identification module (2) is sent according to the mapping relations of look-at-me and device type; And start interface drive program search unit after this unit end of run;
Above-mentioned mapping relations are pre-set mapping relations, in these mapping relations, and different device type corresponding to look-at-me;
Interface drive program search unit: search for the corresponding interface drive program of look-at-me that identification module (2) is sent in storage medium; And start interface drive program loading unit after this unit end of run;
Interface drive program loading unit: loading interface driver; And start configuration successful signal transmitting unit after this unit end of run;
Configuration successful signal transmitting unit: send configuration successful signal to communication process; And start dormancy unit after this unit end of run.
3. the embedded platform IO equipment dynamic recognition system based on external interrupt according to claim 1 and 2, is characterized in that: the described circuit that can produce coded message adopts scrambler to realize.
4. the embedded platform IO equipment dynamic recognition system based on external interrupt according to claim 1 and 2, is characterized in that: described identification module (2) adopts code translator to realize.
5. the IO equipment dynamic identifying method of the embedded platform IO equipment dynamic recognition system based on external interrupt claimed in claim 1, is characterized in that: described processor embeds the IO equipment Dynamic Recognition process that has software to realize, and this process comprises the following steps:
Sleep step: processor is in dormant state, until receive the look-at-me that identification module (2) is sent; And after finishing, this step carries out look-at-me determining step;
Look-at-me determining step: judge whether the look-at-me that identification module (2) is sent is effective look-at-me, and in judged result actuating equipment type inference step when being, return to execution sleep step when judged result is no;
Described effective look-at-me is the look-at-me pre-defining;
Device type identification step: infer the corresponding device type of look-at-me that identification module (2) is sent according to the mapping relations of look-at-me and device type; And finish executive's interface driver search step afterwards in this step;
Above-mentioned mapping relations are pre-set mapping relations, in these mapping relations, and different device type corresponding to look-at-me;
Interface drive program search step: search for the corresponding interface drive program of look-at-me that identification module (2) is sent in storage medium; And finish executive's interface driver load step afterwards in this step;
Interface drive program load step: loading interface driver; And after finishing, this step carries out configuration successful signal forwarding step;
Configuration successful signal forwarding step: send configuration successful signal to communication process; And after finishing, this step returns to execution sleep step.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106502844A (en) * | 2016-10-11 | 2017-03-15 | 郑州云海信息技术有限公司 | A kind of method of the sAS port bandwidths of test RAID memory Is O |
| 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 |
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| CN104102512B (en) | 2017-04-26 |
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