CN103186440A - Method, device and system for detecting in-place state of sub cards - Google Patents
Method, device and system for detecting in-place state of sub cards Download PDFInfo
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- CN103186440A CN103186440A CN2011104462881A CN201110446288A CN103186440A CN 103186440 A CN103186440 A CN 103186440A CN 2011104462881 A CN2011104462881 A CN 2011104462881A CN 201110446288 A CN201110446288 A CN 201110446288A CN 103186440 A CN103186440 A CN 103186440A
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Abstract
The invention discloses a method, a device and a system for detecting the in-place state of sub cards. The method comprises the following steps that a main control panel sends slot position inquiry commands to all sub cards through an asynchronous half-duplex bus, wherein the main control panel is connected with all sub cards through one asynchronous half-duplex bus; and when the main control panel receives response messages fed back by the slot positions inquired by the slot position inquiry commands in the preset time, the state that the sub cards exist in the slot positions inquired by the slot position inquiry commands is determined. When the method, the device and the system are adopted, the problems that in the existing sub card detecting method, the business transmission speed can be reduced or a large number of hardware resources are wasted, and in addition, the utilizable area of a PCB (printed circuit board) is reduced can be solved.
Description
Technical field
The present invention relates to a kind of communication apparatus detection range, relate in particular to a kind of subcard method in place, Apparatus and system of detecting.
Background technology
In modern communication equipment, the structure of " master control borad+subcard " is commonplace.Subcard detection method commonly used at present has two kinds, conventional method shown in Figure 1 and I2C bus method shown in Figure 2.
In the conventional method shown in Figure 1, each subcard all is connected with master control borad by a signal wire, and whether subcard adds at this signal wire and draw resistance to be used for notifying the master control borad subcard in place.The subcard signal lines quantity in place that master control borad needs is identical with the quantity of subcard that system supports.In the method, it is more to detect the signal wire that uses, and under the situation that the signal wire total amount is fixed, can reduce the signal wire for transmitting business signal, reduces professional transmission speed.
In the I2C bus method shown in Figure 2, adopt the I2C bus to realize subcard detection in place, link to each other by one group of I2C bus (I2C clock and data) between master control borad and the subcard, simultaneously master control borad and subcard all respectively need one I2C controller and isolator.Under the more situation of I2C controller and isolator, use great amount of hardware resources, and taken very large tracts of land at printed circuit board (PCB) (PCB), cause the utilizable area of PCB to descend.
Can reduce professional transmission speed or waste great amount of hardware resources at existing subcard detection method in the correlation technique, and the problem that causes the utilizable area of PCB to descend, effective solution is not proposed at present as yet.
Summary of the invention
Can reduce professional transmission speed or waste great amount of hardware resources at existing subcard detection method, and the problem that causes the utilizable area of PCB to descend, the invention provides a kind of subcard method in place, Apparatus and system of detecting, to address the above problem at least.
According to an aspect of the present invention, a kind of subcard method in place that detects is provided, comprise: master control borad sends groove position querying command by the asynchronous half-duplex bus to all subcards, and wherein, described master control borad is connected with described all subcards by an asynchronous half-duplex bus; When described master control borad receives the response message of groove position feedback of described groove position querying command inquiry in the given time, determine to have subcard in the groove position of described groove position querying command inquiry.
Preferably, described master control borad sends groove position querying command by the asynchronous half-duplex bus to all subcards, comprise: described master control borad sends the groove position querying command of inquiring about the different slots position by described asynchronous half-duplex bus to described all subcard polls, inquires about in all groove positions whether have subcard successively.
Preferably, described response message comprises: described daughter board information in place and described subcard type.
Preferably, when current single board is supported hot plug, between described master control borad and described asynchronous half-duplex bus, be connected with current-limiting resistance, between described all subcards and described asynchronous half-duplex bus, be connected with described current-limiting resistance.
Preferably, when current single board was supported hot plug, described master control borad received described response message, and described response message is carried out verification; And described all subcards receive described groove position querying command, and described groove position querying command is carried out verification.
Preferably, described response message is carried out also comprising after the verification: if there is the situation of described response message verification failure, described master control borad abandons described response message; Described groove position querying command is carried out also comprising after the verification: if there is the situation of described groove position querying command verification failure, described subcard abandons the groove position querying command of described verification failure.
Preferably, described master control borad and described all subcards utilize described at least one bit check position to carry out verification operation at least one bit check of communication frames formatting position of transmission.
Preferably, described master control borad, also comprises after all subcards send groove position querying command by the asynchronous half-duplex bus: described master control borad output high-impedance state discharges described asynchronous half-duplex bus.
Preferably, described subcard sends after the response message, also comprises: described subcard output high-impedance state discharges described asynchronous half-duplex bus.
According to a further aspect in the invention, a kind of subcard device in place that detects is provided, be arranged at master control borad, comprise: sending module, be used for sending groove position querying command by the asynchronous half-duplex bus to all subcards, wherein, described master control borad is connected with described all subcards by an asynchronous half-duplex bus; Determination module when being used for receiving in the given time the response message of groove position feedback of described groove position querying command inquiry, is determined to have subcard in the groove position of described groove position querying command inquiry.
According to a further aspect in the invention, a kind of subcard system in place that detects is provided, comprise master control borad and at least one subcard: described master control borad, be connected with described at least one subcard by an asynchronous half-duplex bus, be used for sending groove position querying command by described asynchronous half-duplex bus to all subcards; When receiving the response message of groove position feedback of described groove position querying command inquiry in the given time, determine to have subcard in the groove position of described groove position querying command inquiry; Described at least one subcard be used for to receive described groove position querying command, when determining to have subcard in the groove position of described groove position querying command inquiry, to described master control borad echo reply information.
In embodiments of the present invention, master control borad is connected with all subcards by an asynchronous half-duplex bus, master control borad sends groove position querying command by the asynchronous half-duplex bus to all subcards, when if master control borad can receive the response message that feeds back the groove position of groove position querying command inquiry in the given time, then there is subcard in the groove position of definite groove position querying command inquiry.That is, in embodiments of the present invention, only need an asynchronous half-duplex bus, can vacate more signal wires and be used for transmitting business signal, improve the transmission speed of service signal.And the asynchronous half-duplex bus does not go up need increase an I2C controller and isolator at each subcard, has reduced the use of hardware resource, has also dwindled the area that takies at PCB, increases the available area of PCB.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is that conventional subcard according to correlation technique is at position detecting method;
Fig. 2 is that I2C subcard according to correlation technique is at position detecting method;
Fig. 3 is the processing flow chart according to the detection subcard of embodiment of the invention method in place;
Fig. 4 is the subcard inspection method in place according to the embodiment two of the embodiment of the invention;
Fig. 5 is the structural representation according to the detection subcard of embodiment of the invention device in place;
Fig. 6 is the structural representation according to the detection subcard of embodiment of the invention system in place.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Mention in the correlation technique, in the conventional method shown in Figure 1, each subcard all is connected with master control borad by a signal wire, and whether subcard adds at this signal wire and draw resistance to be used for notifying the master control borad subcard in place.The subcard signal lines quantity in place that master control borad needs is identical with the quantity of subcard that system supports.In the method, it is more to detect the signal wire that uses, and under the situation that the signal wire total amount is fixed, can reduce the signal wire for transmitting business signal, reduces professional transmission speed.
In the I2C bus method shown in Figure 2, adopt the I2C bus to realize subcard detection in place, link to each other by one group of I2C bus (I2C clock and data) between master control borad and the subcard, simultaneously master control borad and subcard all respectively need one I2C controller and isolator.Under the more situation of I2C controller and isolator, use great amount of hardware resources, and taken very large tracts of land at printed circuit board (PCB) (PCB), cause the utilizable area of PCB to descend.
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of subcard method in place that detects, and its treatment scheme comprises as shown in Figure 3:
Step S302, master control borad send groove position querying command by the asynchronous half-duplex bus to all subcards;
Wherein, master control borad is connected with all subcards by an asynchronous half-duplex bus;
When step S304, master control borad receive the response message of groove position feedback of groove position querying command inquiry in the given time, determine to have subcard in the groove position of groove position querying command inquiry.
In embodiments of the present invention, master control borad is connected with all subcards by an asynchronous half-duplex bus, master control borad sends groove position querying command by the asynchronous half-duplex bus to all subcards, when if master control borad can receive the response message that feeds back the groove position of groove position querying command inquiry in the given time, then there is subcard in the groove position of definite groove position querying command inquiry.That is, in embodiments of the present invention, only need an asynchronous half-duplex bus, the line that needs are taken minimizes, and can vacate more signal wires and be used for transmitting business signal, improves the transmission speed of service signal.And the asynchronous half-duplex bus does not go up need increase an I2C controller and isolator at each subcard, has reduced the use of hardware resource, has also dwindled the area that takies at PCB, increases the available area of PCB.
In embodiments of the present invention, current when having a plurality of grooves position, master control borad can carry out poll inquiry to whether there being subcard in the groove position, namely, master control borad sends the groove position querying command of inquiring about the different slots position by the asynchronous half-duplex bus to all subcard polls, inquires about in all groove positions whether have subcard successively.
Further, in the method for two kinds of detection subcards that correlation technique provides, master control borad all also needs to provide in addition an interface to be used for inquiring about the board type of subcard, the waste hardware resource.And in embodiments of the present invention, can in response message, add the correlation parameter of subcard, and for example, can in response message, feed back daughter board information in place and subcard type simultaneously, thereby avoid providing in addition an interface, save hardware resource.
When current single board is supported hot plug, between master control borad and asynchronous half-duplex bus, be connected with current-limiting resistance, between all subcards and asynchronous half-duplex bus, be connected with current-limiting resistance, play the insulation blocking effect.
The I2C communications protocol does not possess the verification to data integrality, correctness, and current single board need constantly plug operation to subcard when supporting hot plug, and this just causes the communication data mistake easily.For solving this technical problem, the embodiment of the invention provides a kind of preferred disposal route, namely, master control borad receives response message, response message is carried out verification, and all subcards that master control borad connects receive groove position querying command, and groove position querying command is carried out verification.The embodiment of the invention provides the verification to data integrality, correctness, improves the communication robustness.
If there is the situation of response message verification failure, master control borad abandons response message.In like manner, if there is the situation of groove position querying command verification failure, subcard also abandons the groove position querying command of verification failure.
The mode of verification can have multiple, and is preferred, can master control borad and the communication frames formatting at least one bit check position of all subcards in transmission, and utilize at least one bit check position of setting to carry out verification operation.
Because the asynchronous half-duplex bus has only one, therefore, for improving the service efficiency of asynchronous half-duplex bus, after all subcards sent groove position querying command, master control borad can be exported high-impedance state to master control borad by the asynchronous half-duplex bus, discharged the asynchronous half-duplex bus.In like manner, subcard sends after the response message, and subcard can be exported high-impedance state, discharges the asynchronous half-duplex bus.
In summary, embodiment of the invention technical matters to be solved is: how to reduce master control borad for detection of subcard backplane interface signal in place, reduce required device, the communication robustness when improving the veneer hot plug.For the embodiment of the invention being provided clearer clearer, now be described with specific embodiment with detecting subcard method elaboration in place.
Embodiment one
Present embodiment is by the following technical solutions:
Master control borad links to each other with all subcards with single line, and this line provides high level by pull-up resistor, and master control borad and subcard can be exported high resistant or low level two states, adopts baud rate and the data frame format of agreement, constitutes an asynchronous half-duplex bus.When needs are supported the veneer hot plug, between master control and the bus, the upper flow resistance of can going here and there between subcard and the bus adds protection to device, in data frame format, add check bit simultaneously integrality, the correctness of data tested.
The solution that present embodiment provides comprises with lower module:
Master control borad poll module: on master control borad, be used for sending polling message to subcard.Be that master control borad sends polling message.
The subcard responder module: on subcard, the polling message (being the groove position querying command that poll sends) that is used for master control borad is made and being replied.Be that subcard is replied the polling message of master control borad.
And asynchronous half-duplex bus between the two, hereinafter convenient for setting forth, can directly be referred to as bus.
Adopting above-mentioned module to realize detecting subcard method in place may further comprise the steps:
The first step: master control borad energising, master control borad poll module output high-impedance state.
Second step: subcard energising, subcard responder module output high-impedance state.
The 3rd step: master control borad poll module sends out groove position querying command No. one to all subcards, comprises the groove position information of inquiring about in the querying command.After sending order, export high-impedance state immediately to discharge bus.
The 4th step: if a groove seat is stuck in the position, then makes at the poll of master control borad and replying.Response message can comprise the in place and subcard type of daughter board.After sending response message, export high-impedance state immediately to discharge bus.
The 5th step: if the response message of a groove seat card is received in master control, think that then a groove position is inserted with subcard, and note this subcard type.If in the designated time, can not receive the response message of subcard, think that then a groove position does not have subcard.
The 6th step: master control borad poll module sends out groove position querying command No. two.
......
Ceaselessly inquire about all groove positions repeatedly.
When needs are supported the veneer hot plug, when master control or subcard receive order or information, need carry out verification to order or information, should abandon for order or the information of verification failure.
Beneficial effect: the detection subcard method in place that adopts the embodiment of the invention to provide, compare with the subcard detection technique of present use,
Compare at position detecting method with the subcard of Fig. 1 routine, advantage has two: one, can reduce master control borad for detection of subcard backplane interface signal in place, and be used for transmitting business signal to vacate more signal wires; Its two, only can obtain whether information in place of subcard in the conventional method, need remove to obtain the subcard type information by other interface, this method can be obtained in place and the subcard type information simultaneously.
Compare with the I2C interface of Fig. 2, advantage has three: one, can reduce the necessary I2C isolator of I2C interface, and this method only need add a current-limiting resistance at each subcard and get final product, and has reduced hardware cost and PCB layout area; Its two, the I2C communications protocol does not possess the verification to data integrality, correctness, plug cause the communication data mistake easily, and this method provides the verification to data integrality, correctness plate the time, improves the communication robustness; Its three, as long as this method is single line, the line that needs are taken minimizes.
Embodiment two
In the present embodiment, utilize the module identical with embodiment one to detect.Master control borad poll module, the subcard responder module all adopts CPLD (Complex Programmable Logic Device, programmable logic controller (PLC) spare) realizes, master control borad links to each other with all subcards by an asynchronous half-duplex bus, this line is by moving power supply on the resistance, master control borad and subcard can be exported high resistant or low level two states, the communication frames form is that 1 bit low level is represented the start bit, follow 8 Bit datas and 1 bit data check bit, last 1 bit high level is position of rest, baud rate is decided to be 115200bps approximately, communication process adopts " master control borad inquiry, subcard is replied " mode to carry out, and guarantees can not conflict.Inquiry velocity is very fast, for the system of 20 veneers as long as 3 to 4 milliseconds can be finished inquiry.Integrality, the correctness of communication data are guaranteed by check bit, find that verification makes mistakes, and abandon these data and restart inquiry.Master control borad poll module is at first sent querying command, after card is received the querying command of master control borad, then sends response message to master control borad immediately, and response message comprises plate information in place and plate type information.
System has 1 to M to be total to M groove position, supports A, B, C, D ... some type subcards.Master control borad at first sends request signal " 01 " (being hexadecimal code) here to bus, and whether No. 1 groove position of expression inquiry is inserted with subcard and subcard type.Suppose that No. 1 groove position has the category-A subcard in place, then this subcard at first carries out verification to the data that receive, if verification failure then abandon this data, otherwise reply " 0A ", represent that No. 1 groove position is inserted with the category-A subcard; Master control borad at first carries out verification to data after receiving the response message of No. 1 groove seat card, if verification failure then abandon this data otherwise thinks that No. 1 groove position is inserted with subcard, and learns that what inserted is the category-A subcard.When subcard was not inserted in No. 1 groove position, then master control borad can not received any response message at the appointed time, and master control borad thinks that this groove position is not inserted with subcard.Then, as a same reason, master control borad sends querying command " 02 " to No. 2 groove positions ... master control borad constantly sends polling message to each groove position, according to the situation of replying of each groove seat card, judge subcard whether in place with and type.
Based on same inventive concept, the embodiment of the invention also provides a kind of subcard device in place that detects, and is arranged at master control borad, and its structural representation comprises as shown in Figure 5:
Sending module 501 is used for sending groove position querying command by the asynchronous half-duplex bus to all subcards, and wherein, master control borad is connected with all subcards by an asynchronous half-duplex bus;
Based on same inventive concept, the embodiment of the invention also provides a kind of subcard system in place that detects, and its structural representation comprises master control borad 601 and at least one subcard 602 as shown in Figure 6:
Master control borad 601 is connected with at least one subcard 602 by an asynchronous half-duplex bus, is used for sending groove position querying command by the asynchronous half-duplex bus to all subcards; When receiving the response message of groove position feedback of groove position querying command inquiry in the given time, determine to have subcard in the groove position of groove position querying command inquiry;
At least one subcard 602 is used for receiving slit position querying command, when determining to have subcard in the groove position of groove position querying command inquiry, to master control borad 601 echo reply information.
As can be seen from the above description, the present invention has realized following technique effect:
In embodiments of the present invention, master control borad is connected with all subcards by an asynchronous half-duplex bus, master control borad sends groove position querying command by the asynchronous half-duplex bus to all subcards, when if master control borad can receive the response message that feeds back the groove position of groove position querying command inquiry in the given time, then there is subcard in the groove position of definite groove position querying command inquiry.That is, in embodiments of the present invention, only need an asynchronous half-duplex bus, can vacate more signal wires and be used for transmitting business signal, improve the transmission speed of service signal.And the asynchronous half-duplex bus does not go up need increase an I2C controller and isolator at each subcard, has reduced the use of hardware resource, has also dwindled the area that takies at PCB, increases the available area of PCB.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. one kind is detected subcard method in place, it is characterized in that, comprising:
Master control borad sends groove position querying command by the asynchronous half-duplex bus to all subcards, and wherein, described master control borad is connected with described all subcards by an asynchronous half-duplex bus;
When described master control borad receives the response message of groove position feedback of described groove position querying command inquiry in the given time, determine to have subcard in the groove position of described groove position querying command inquiry.
2. method according to claim 1 is characterized in that, described master control borad sends groove position querying command by the asynchronous half-duplex bus to all subcards, comprising:
Described master control borad sends the groove position querying command of inquiring about the different slots position by described asynchronous half-duplex bus to described all subcard polls, inquires about in all groove positions whether have subcard successively.
3. method according to claim 1 is characterized in that, described response message comprises: described daughter board information in place and described subcard type.
4. method according to claim 1, it is characterized in that, when current single board is supported hot plug, between described master control borad and described asynchronous half-duplex bus, be connected with current-limiting resistance, between described all subcards and described asynchronous half-duplex bus, be connected with described current-limiting resistance.
5. method according to claim 1 is characterized in that, when current single board was supported hot plug, described master control borad received described response message, and described response message is carried out verification; And described all subcards receive described groove position querying command, and described groove position querying command is carried out verification.
6. method according to claim 5 is characterized in that,
Described response message is carried out also comprising after the verification: if there is the situation of described response message verification failure, described master control borad abandons described response message;
Described groove position querying command is carried out also comprising after the verification: if there is the situation of described groove position querying command verification failure, described subcard abandons the groove position querying command of described verification failure.
7. according to each described method of claim 1 to 6, it is characterized in that described master control borad and described all subcards utilize described at least one bit check position to carry out verification operation at least one bit check of communication frames formatting position of transmission.
8. according to each described method of claim 1 to 6, it is characterized in that described master control borad, also comprises after all subcards send groove position querying command by the asynchronous half-duplex bus: described master control borad output high-impedance state discharges described asynchronous half-duplex bus.
9. according to each described method of claim 1 to 6, it is characterized in that described subcard sends after the response message, also comprises: described subcard output high-impedance state discharges described asynchronous half-duplex bus.
10. one kind is detected subcard device in place, it is characterized in that, is arranged at master control borad, comprising:
Sending module is used for sending groove position querying command by the asynchronous half-duplex bus to all subcards, and wherein, described master control borad is connected with described all subcards by an asynchronous half-duplex bus;
Determination module when being used for receiving in the given time the response message of groove position feedback of described groove position querying command inquiry, is determined to have subcard in the groove position of described groove position querying command inquiry.
11. one kind is detected subcard system in place, it is characterized in that, comprises master control borad and at least one subcard:
Described master control borad is connected with described at least one subcard by an asynchronous half-duplex bus, is used for sending groove position querying command by described asynchronous half-duplex bus to all subcards; When receiving the response message of groove position feedback of described groove position querying command inquiry in the given time, determine to have subcard in the groove position of described groove position querying command inquiry;
Described at least one subcard be used for to receive described groove position querying command, when determining to have subcard in the groove position of described groove position querying command inquiry, to described master control borad echo reply information.
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| CN105740113B (en) * | 2016-02-29 | 2019-03-26 | 迈普通信技术股份有限公司 | A kind of method and device that the port debug is tested automatically |
| CN107124369A (en) * | 2017-04-21 | 2017-09-01 | 新华三技术有限公司 | MAC address entries quantity acquisition methods and device |
| CN107124369B (en) * | 2017-04-21 | 2020-01-03 | 新华三技术有限公司 | Method and device for acquiring number of MAC (media Access control) table entries |
| CN107391399A (en) * | 2017-07-06 | 2017-11-24 | Tcl移动通信科技（宁波）有限公司 | A kind of mobile terminal and its SD card detection control method for frequency and storage medium |
| CN107391399B (en) * | 2017-07-06 | 2022-01-11 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal, SD card detection frequency control method thereof and storage medium |
| CN112272122A (en) * | 2020-10-14 | 2021-01-26 | 北京中科网威信息技术有限公司 | FPGA accelerator card detection method and device and readable storage medium |
| CN113140101A (en) * | 2021-03-26 | 2021-07-20 | 青岛鼎信通讯股份有限公司 | Station electric energy acquisition terminal based on RS-485 bus |
| CN114003251A (en) * | 2021-12-30 | 2022-02-01 | 北京中科网威信息技术有限公司 | FPGA accelerator card detection method, device, equipment and computer storage medium |
| CN114003251B (en) * | 2021-12-30 | 2022-04-15 | 北京中科网威信息技术有限公司 | FPGA accelerator card detection method, device, equipment and computer storage medium |
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