CN105718403A - Expansion interface and method for data communication through same - Google Patents
Expansion interface and method for data communication through same Download PDFInfo
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- CN105718403A CN105718403A CN201610032210.8A CN201610032210A CN105718403A CN 105718403 A CN105718403 A CN 105718403A CN 201610032210 A CN201610032210 A CN 201610032210A CN 105718403 A CN105718403 A CN 105718403A
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- 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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Abstract
The embodiment of the invention discloses a method for data communication through an expansion interface. The expansion interface comprises a master processor and a plurality of slave processors, wherein the master processor is respectively connected with the plurality of slave processors and is connected with an upper computer; the plurality of slave processors are connected with different data sources. The method comprises the steps: the master processor receives communication data, from the upper computer, carrying address identifications, and forwards the communication data to the data sources via the slave processors corresponding to the address identifications if the address identifications correspond to the slave processors; the master processor receives response data from the data sources via the slave processors and transmits the response data carrying the address identifications of the slave processors to the upper computer. According to the method, an interface of the upper computer is expanded, the speed and the real time of data communication are effectively improved.
Description
Technical field
The present invention relates to data-interface and communication field, be specifically related to a kind of be carried out data communications method and the expansion interface for data communication by expansion interface.
Background technology
In current equipment, it is generally all integrated by the module of multiple difference in functionalitys, they are uniformly carried out the management of data by a host computer, and in the equipment being integrated with functional module, interface and data-handling capacity to host computer are proposed higher requirement.
For the submodule in equipment, each submodule is a data source, is connected with host computer by respective interface, and they are carried out parameter setting, real-time Data Transmission or periodic status checkout by host computer, additionally, host computer is also performed to other data processing work.
But, for these submodules, interface is each different, such as there are the different types of interfaces such as RS232 cable interface, optical fiber 232 interface, RS485 EBI, RS422 interface, host computer needs to be connected with various types of interfaces, the autgmentability of host computer interface is bad, also the disposal ability of host computer is proposed higher requirement.
Summary of the invention
The invention provides and a kind of carry out the method for data communication and for the expansion interface of data communication by expansion interface, it is possible to solve the connection of host computer and various data sources, improve the communication performance of host computer and different pieces of information source.
The invention provides a kind of method carrying out data communication by expansion interface, expansion interface includes primary processor and multiple from processor, and primary processor is connected from processor with multiple respectively, and primary processor is connected with host computer, each data source different from processor connection, described method includes:
Primary processor receives the communication data carrying address designation from host computer, if address designation is corresponding to processor, then from processor, communication data is forwarded to data source through corresponding with address designation；
Primary processor is through receiving the response data from data source from processor, and sends the response data carried from processor address mark to host computer.
Optionally, if address designation correspondence primary processor, described method also includes:
Primary processor accepts the communication data from host computer, and according to communication data content, through sending request of data from processor to data source；
Primary processor is through receiving the response data from data source from processor, and judges that whether response data is abnormal；
According to judged result, primary processor returns the judged result data carried from processor address mark to host computer.
Optionally, communication data content is by predetermined period polling operation, then primary processor presses predetermined period, through sending request of data from processor to data source.
Optionally, it is judged that whether response data includes extremely:
If one time response data is abnormal, then it is assumed that response data is abnormal.
Optionally, it is judged that whether response data includes extremely:
If within certain time, the number of times that the response data received is abnormal exceedes pre-determined number, then it is assumed that response data is abnormal.
Additionally, present invention also offers a kind of expansion interface for data communication, including primary processor and multiple from processor, primary processor is connected from processor with multiple respectively, and primary processor is connected with host computer, each data source different from processor connection, wherein, primary processor includes:
Down forward unit, for receiving the communication data carrying address designation from host computer, if address designation is corresponding to processor, then communication data is forwarded to data source through corresponding with address designation from processor；
Forwarded upstream unit, receives the response data from data source for warp from processor, and will carry from the response data transmission of processor address mark to host computer.
Optionally, if address designation correspondence primary processor, primary processor also includes:
Control unit, for accepting the communication data from host computer, and according to communication data content, through sending request of data from processor to data source；
Judging unit, receives the response data from data source for warp from processor, and judges that whether response data is abnormal；
Return unit, for according to judged result, returning the judged result data carried from processor address mark to host computer.
Optionally, communication data content is by predetermined period polling operation, then primary processor presses predetermined period, through sending request of data from processor to data source.
Optionally, it is judged that in unit, it is judged that whether response data includes extremely: if a response data is for abnormal, then it is assumed that response data is abnormal.
Optionally, it is judged that in unit, it is judged that whether response data includes extremely: within certain time, the number of times that the response data received is abnormal exceedes pre-determined number, then it is assumed that response data is abnormal.
Inventive embodiments provides a kind of expansion interface and the method carrying out data communication by expansion interface, expansion interface includes primary processor and multiple from processor, primary processor is connected from processor with multiple respectively, primary processor is connected with host computer, each data source different from processor connection, from processor, the upstream data from data source is sent to host computer by primary processor, realizes carrying out data communication by expansion interface.In the method, for different data sources, by the special communication carrying out data from processor, respectively carry out data communication from processor and host computer, host computer only with primary processor data communication, the interface of host computer has been extended, and has been effectively improved speed and the real-time of data communication.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present application, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The method flow diagram being carried out data communication by expansion interface that Fig. 1 provides for the embodiment of the present invention；
The expansion interface structural representation for data communication that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of the application protection.
In the present invention, propose the data communications method of a kind of expansion interface, with reference to shown in Fig. 1 and Fig. 2, Fig. 1 is the data communications method of the expansion interface of the present invention, Fig. 2 is the structural representation of expansion interface according to embodiments of the present invention, expansion interface includes primary processor 12 and multiple from processor 14, primary processor 12 is connected from processor 14 with multiple respectively, primary processor 12 is connected with host computer 10, each connect different data sources 16 from processor 14, described method includes: S01, primary processor receives the communication data carrying address designation from host computer, if address designation is corresponding to processor, then communication data is forwarded to data source through corresponding with address designation from processor；S02, primary processor is through receiving the response data from data source from processor, and sends the response data carried from processor address mark to host computer.
In embodiments of the present invention, host computer is generally the computer that can send manipulation instruction.Primary processor and be the control unit with data processing function and data-interface from processor, can be MCU (MicroControlUnit, micro control unit), FPGA (FieldProgrammableGateArray, field programmable logic device) or CPLD (ComplexProgrammableLogicDevice, CPLD) etc..
In embodiments of the present invention, primary processor is connected with host computer by communication interface, realize the data communication between host computer and primary processor, primary processor connects from processor from different respectively, realize primary processor from different from the data communication between processor, different data sources is connected respectively from processor for each, data source is the source of host computer desired data, can be each function sub-modules or the subset etc. in a system or equipment, each function sub-modules or subset need to provide self relevant data to host computer, these data such as duty, operating current, voltage data etc..These are supplied to the data of host computer, be called and upstream data be monitored or process further for host computer in the present invention.
Connected mode between primary processor and host computer, primary processor and from the connected mode between processor, and the connected mode from processor Yu data source, it is possible to determine according to the hardware case that each processor and data source are concrete.In a specific embodiment, primary processor and from processor select MCU chip, MCU chip generally all has the data-interfaces such as SPI interface, UART interface, I2C interface or GPIO interface, primary processor is connected with host computer optical fiber by UART interface, such as optical fiber 232, to provide data communication at a high speed, primary processor is connected by bus with between processor, each submodule in data source respectively magnetic resonance imaging system, each submodule and can by suitable communication interface communication between processor.
In order to be more fully understood that technical scheme and technique effect, it is described in detail below with reference to specific embodiment.
Before host computer carries out data communication by this expansion interface, all setting completed for the parameter of the communication interface being generally connected from processor with data source, the setting from processor communication interface can be realized by various modes, in embodiments of the present invention, host computer the setting of this parameter is initiated.
In one embodiment, concrete, in step S101, primary processor receives the packet from host computer, and packet includes the address designation from processor and interface arranges data.
In concrete enforcement, primary processor and host computer adopt the data protocol of definition to carry out data communication, and according to data protocol, the packet of definition can be following table one form:
| Byte 1 | Byte 2 | …… | Byte N |
| Packet length | Address designation | Data content | CRC check |
Table one
This packet includes packet length, address designation, data content and CRC check, and the length of each several part and numerical value can carry out concrete setting as required, and in a specific embodiment, packet length is a byte, and numerical value is 3～255；Address designation accounts for a byte, and this address designation is corresponding to primary processor or from processor, for the address designation of processor in expansion interface, numerical value is 0～N, and 0 represents that primary processor receives data, other numeric representations other receive data from processor accordingly.Data content is the data of actual transmissions, is 252 bytes to the maximum.CRC check, accounts for a byte.It is understood that the form of packet herein, content and concrete numerical value can be defined according to concrete needs, merely illustrative herein, the present invention is not limited to this.
In this embodiment, address designation correspondence to carry out the primary processor of interface setting or from processor, data content is that interface arranges data, interface arranges data and the communication interface relating to parameters from processor, different structure according to processor, this parameter is different type, in one embodiment, for instance for the baud rate etc. of interface.
In step S102, interface is arranged data according to address designation and sends extremely from processor by primary processor.
In the particular embodiment, when host computer sends packet to primary processor, primary processor identifies the reception length of data successively with the data carrying packet length in the first character joint of the packet received.After having received, it is complete that packet is carried out parsing by primary processor, primary processor accepts the data content in packet, and data content is forwarded to address designation corresponding from processor, it is possible to the former data of data content are forwarded to corresponding process from processor or data content is carried out by certain format after be forwarded to from processor.
In step S103, from processor, data are set according to interface and communicate the parameter setting of interface.
After receiving data content from processor, arrange accordingly.Concrete, it is configured from the interface of processor, for instance communication interface is set to concrete baud rate etc., in order to from the proper communication between processor and data source.
After carrying out relative set from processor, can determine the need for carrying out the return of state according to data content, if desired, then from processor, the status information after arranging is back to primary processor, this status information will be comprised by primary processor and send to host computer from the packet of the address designation of processor, the form of this packet is with the form of above-mentioned packet, after host computer resolution data bag, it is possible to identifies data by address designation and which comes from from processor.
After carrying out above-mentioned setting, host computer and data communication in data source is realized by expansion interface, the present invention is initiated the request of data communication by host computer, by primary processor by communication data through being forwarded to data source from processor, response data warp is sent to primary processor by data source from processor, and then sent to host computer by primary processor, thus, complete the data interaction between host computer and data source.
In another embodiment, concrete, in step S201, primary processor receives the communication data carrying address designation from host computer, if address designation is corresponding to processor, then from processor, communication data is forwarded to data source through corresponding with address designation.
In embodiments of the present invention, the data packet format in above-mentioned table one can be adopted, address designation respectively corresponding primary processor and from processor, when address designation correspondence is from processor, then communication data is forwarded by primary processor, primary processor communication data is sent to address designation corresponding from processor, again communication data is sent to data source by from processor.Data sources, after communication data, makes corresponding response, returns response data to from processor.In the particular embodiment, when host computer sends packet to primary processor, the first character joint packet length of the primary processor packet to receive identifies the reception length of data successively.After having received, it is complete that packet is carried out parsing by primary processor.
The information carried in communication data can be generally can be provided by the data request information of relevant parameter in data source, difference according to data source types, the data of request response can be such as work state information, operating current, running voltage or other relevant parameters etc..
In step S202, primary processor is through receiving the response data from data source from processor, and sends the response data carried from processor address mark to host computer.
Response data from data source is passed through and is sent to primary processor from processor, concrete, can after receiving complete response data from processor, namely a response data all receives, just sending to primary processor, based on this transmission means, primary processor is without integrating further the data since processor, decrease the data processing work of primary processor, improve the data-handling capacity of primary processor.
It is, of course, understood that when response data is bigger, it would however also be possible to employ response data is sent to primary processor by the mode of part data transmission several times, and these data divisions, after receiving all data, are integrated into complete data by primary processor.
So, realize host computer and data communication in data source by expansion interface, in the above-described embodiment, achieved the data interaction of host computer and data source by primary processor, host computer obtains after response data and can be further processed and apply, for instance be monitored or breakdown judge etc..
Additionally, for the data processing work further reducing host computer, realize further data processing work also by main processor unit, in embodiments of the present invention, start following step by address designation.
Concrete, if address designation correspondence primary processor, in step S301, primary processor accepts the communication data that host computer sends, and according to communication data content, through sending request of data from processor to data source.
When address designation correspondence primary processor, namely represent that this communication data is destined to primary processor, primary processor accepts this communication data, including at least there being host computer to need primary processor to obtain the relevant solicited message of response data and the address designation from processor being connected with data source to data source in this kind of communication data, the mode of oriented data source request data can also be comprised, as being polled by predetermined period or the mode such as single request of data.If polling mode, then primary processor sends request of data from processor to data source according to predetermined period warp.After data source receives request of data, make corresponding response, return response data to from processor.
In step S302, primary processor is through receiving the response data from data source from processor, and judges that whether response data is abnormal.
Same above-described embodiment, can send receiving complete response data to primary processor from processor, it is also possible to send response data to primary processor several times.
After primary processor receives response data, it is not transmitted to host computer, but further corresponding data is carried out abnormal judgement.For abnormal judgement, it is possible to adopt suitable method to carry out.
In some specific embodiments, for some response datas, when judging that whether response data is abnormal, if a response data is abnormal, then it is assumed that response data is abnormal.Response data whether extremely can by judging whether response data judges in default threshold range, if exceeding default threshold range, then it is assumed that these secondary response data are abnormal, and the method is applicable to the mode of poll and single request of data.
In other specific embodiments, when judging that whether response data is abnormal, if within certain time, the number of times that the response data received is abnormal exceedes pre-determined number, then it is assumed that response data is abnormal.It is to say, be made whether abnormal judged result based on the judgement of the exception of response data several times, so can ensure that the accuracy of abnormal judged result, it is to avoid abnormal wrong report, the method is applicable to polling mode.
In step S303, according to judged result, primary processor returns the judged result data carried from processor address mark to host computer.
According to different judged results, determine to the concrete judged result data that host computer returns.
In some specific embodiments, if judged result is abnormal, primary processor can return the judged result data of data source fault to host computer, and these data carry the address designation from processor, so which data source that host computer knows correspondence is fault.If judged result is normal, then primary processor abandons response data, does not return any information to host computer, in this mode, decrease the data processing work of host computer, decrease the data volume to receive simultaneously, the failure condition of data source can also be understood simultaneously in time.Normal for data source judged result can also be returned to host computer by certain primary processor.
In further embodiments, if judged result is abnormal, it is also possible to response data time further by exception is sent to host computer, so, it is that host computer filters a part of normal data by primary processor, at the same time it can also be the data during by exception are supplied to host computer and do further application.
Carrying out the method for data communication by expansion interface and be described in detail the embodiment of the present invention above, in addition, present invention also offers a kind of expansion interface, with reference to shown in Fig. 2, including primary processor 12 and multiple from processor 14, primary processor 12 is connected from processor 14 with multiple respectively, primary processor 12 is connected with host computer 10, each connect different data sources 16 from processor 14, wherein
Primary processor includes:
Down forward unit, for receiving the communication data carrying address designation from host computer, if address designation is corresponding to processor, then communication data is forwarded to data source through corresponding with address designation from processor；
Forwarded upstream unit, receives the response data from data source for warp from processor, and will carry from the response data transmission of processor address mark to host computer.
Further, if address designation correspondence primary processor, primary processor also includes:
Control unit, for accepting the communication data from host computer, and according to communication data content, through sending request of data from processor to data source；
Judging unit, receives the response data from data source for warp from processor, and judges that whether response data is abnormal；
Return unit, for according to judged result, returning the judged result data carried from processor address mark to host computer.
Further, communication data content is by predetermined period polling operation, then primary processor presses predetermined period, through sending request of data from processor to data source.
Further, it is judged that in unit, it is judged that whether response data includes extremely: if a response data is for abnormal, then it is assumed that response data is abnormal.
Further, it is judged that in unit, it is judged that whether response data includes extremely: within certain time, the number of times that the response data received is abnormal exceedes pre-determined number, then it is assumed that response data is abnormal.
For expansion interface, owing to it corresponds essentially to embodiment of the method, so relevant part illustrates referring to the part of embodiment of the method.Embodiments described above is merely schematic, the wherein said module illustrated as separating component can be or may not be physically separate, the parts shown as module can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE.Some or all of module therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.When there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.
Expand the method carrying out data current and be described in detail to the expansion interface of the embodiment of the present invention and by extending to connect above, principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, all will change in specific embodiments and applications, in sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. the method carrying out data communication by expansion interface, it is characterised in that expansion interface includes primary processor and multiple from processor, primary processor is connected from processor with multiple respectively, primary processor is connected with host computer, each data source different from processor connection, and described method includes:
Primary processor receives the communication data carrying address designation from host computer, if address designation is corresponding to processor, then from processor, communication data is forwarded to data source through corresponding with address designation；
Primary processor is through receiving the response data from data source from processor, and sends the response data carried from processor address mark to host computer.
2. method according to claim 1, it is characterised in that if address designation correspondence primary processor, described method also includes:
Primary processor accepts the communication data from host computer, and according to communication data content, through sending request of data from processor to data source；
Primary processor is through receiving the response data from data source from processor, and judges that whether response data is abnormal；
According to judged result, primary processor returns the judged result data carried from processor address mark to host computer.
3. method according to claim 2, it is characterised in that communication data content is by predetermined period polling operation, then primary processor presses predetermined period, through sending request of data from processor to data source.
4. according to the method in claim 2 or 3, it is characterised in that judge whether response data includes extremely:
If one time response data is abnormal, then it is assumed that response data is abnormal.
5. method according to claim 3, it is characterised in that judge whether response data includes extremely:
If within certain time, the number of times that the response data received is abnormal exceedes pre-determined number, then it is assumed that response data is abnormal.
6. the expansion interface for data communication, it is characterised in that include primary processor and multiple from processor, primary processor is connected from processor with multiple respectively, and primary processor is connected with host computer, each data source different from processor connection, wherein, primary processor includes:
Down forward unit, for receiving the communication data carrying address designation from host computer, if address designation is corresponding to processor, then communication data is forwarded to data source through corresponding with address designation from processor；
Forwarded upstream unit, receives the response data from data source for warp from processor, and will carry from the response data transmission of processor address mark to host computer.
7. expansion interface according to claim 6, it is characterised in that if address designation correspondence primary processor, primary processor also includes:
Control unit, for accepting the communication data from host computer, and according to communication data content, through sending request of data from processor to data source；
Judging unit, receives the response data from data source for warp from processor, and judges that whether response data is abnormal；
Return unit, for according to judged result, returning the judged result data carried from processor address mark to host computer.
8. expansion interface according to claim 7, it is characterised in that communication data content is by predetermined period polling operation, then primary processor presses predetermined period, through sending request of data from processor to data source.
9. expansion interface according to claim 8, it is characterised in that in judging unit, it is judged that whether response data includes extremely a: if response data is for abnormal, then it is assumed that response data is abnormal.
10. expansion interface according to claim 8, it is characterised in that in judging unit, it is judged that whether response data includes extremely: within certain time, the number of times that the response data received is abnormal exceedes pre-determined number, then it is assumed that response data is abnormal.
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| CN110618634A (en) * | 2019-09-27 | 2019-12-27 | 深圳市云慧联科技有限公司 | 485 communication interface expansion device and communication method |
| CN111400230A (en) * | 2020-03-10 | 2020-07-10 | 昆山丘钛微电子科技有限公司 | Data transmission method, system, control device and storage medium |
| CN112860614A (en) * | 2021-04-26 | 2021-05-28 | 江苏富浩电子科技有限公司 | High-speed serial expansion interface |
| CN112860614B (en) * | 2021-04-26 | 2021-07-09 | 江苏富浩电子科技有限公司 | High-speed serial expansion interface |
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Address after: 110179 No. 177-1 Innovation Road, Hunnan District, Shenyang City, Liaoning Province Applicant after: DongSoft Medical System Co., Ltd. Address before: Hunnan New Century Road 110179 Shenyang city of Liaoning Province, No. 16 Applicant before: Dongruan Medical Systems Co., Ltd., Shenyang |
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Application publication date: 20160629 |