CN103186440B - Detect subcard method, apparatus and system in place - Google Patents
Detect subcard method, apparatus and system in place Download PDFInfo
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- CN103186440B CN103186440B CN201110446288.1A CN201110446288A CN103186440B CN 103186440 B CN103186440 B CN 103186440B CN 201110446288 A CN201110446288 A CN 201110446288A CN 103186440 B CN103186440 B CN 103186440B
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- slot position
- subcard
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Abstract
The invention discloses a kind of method, apparatus and system that detection subcard is in place, this method comprises: master control borad sends slot position querying command to all subcards by asynchronous half-duplex bus, wherein master control borad is connect by an asynchronous half-duplex bus with all subcards；When master control borad receives the response message of slot position feedback of slot position querying command inquiry in the given time, determine that there are subcards in the slot position of slot position querying command inquiry.Business transmission speed or waste great amount of hardware resources can be reduced by being able to solve existing subcard detection method using the present invention, and the problem of cause PCB utilizable area decline.
Description
Technical field
The present invention relates to a kind of communication apparatus detection field more particularly to a kind of detection subcard method, apparatus in place and
System.
Background technique
In Modern communication devices, the structure of " master control borad+subcard " is commonplace.Currently used subcard detection method has
Two kinds, conventional method shown in FIG. 1 and I2C bus method shown in Fig. 2.
In conventional method shown in FIG. 1, each subcard passes through a signal wire and connects with master control borad, and subcard is in the signal
Line is used to notify whether master control board daughter card is in place plus pull-up resistor.Master control borad need subcard signal lines quantity in place be
The quantity of the supported subcard of system is identical.In the method, detect that the signal wire used is more, in the situation that signal wire total amount is fixed
Under, the signal wire for being used for transmission service signal can be reduced, business transmission speed is reduced.
In I2C bus method shown in Fig. 2, realizes that subcard detects in place using I2C bus, lead between master control borad and subcard
One group of I2C bus (I2C clock with data) is crossed to be connected, at the same master control borad and subcard all respectively need an I2C controller and every
From device.In the case that I2C controller and isolator are more, occupied using great amount of hardware resources, and in printed circuit board (PCB)
Very large area causes the utilizable area decline of PCB.
Business transmission speed or a large amount of hardware moneys of waste can be reduced for existing subcard detection method in the related technology
Source, and the problem of cause PCB utilizable area decline, currently no effective solution has been proposed.
Summary of the invention
Business transmission speed or waste great amount of hardware resources can be reduced for existing subcard detection method, and is caused
The problem of utilizable area of PCB declines detects subcard method, apparatus and system in place the present invention provides a kind of, with
At least solve the above problems.
According to an aspect of the invention, there is provided a kind of method that detection subcard is in place, comprising: master control borad passes through asynchronous
Half-duplex bus sends slot position querying command to all subcards, wherein the master control borad by asynchronous half-duplex bus with
All subcard connections；The master control borad receives the slot position feedback of the slot position querying command inquiry in the given time
When response message, determine that there are subcards in the slot position of the slot position querying command inquiry.
Preferably, the master control borad sends slot position querying command to all subcards by asynchronous half-duplex bus, comprising: institute
It states master control borad and sends the slot position inquiry life for inquiring different slot positions to all subcard polls by the asynchronous half-duplex bus
It enables, successively inquires in all slot positions with the presence or absence of subcard.
Preferably, the response message includes: the daughter board information in place and the subcard type.
Preferably, it when current single board supports hot plug, is connected between the master control borad and the asynchronous half-duplex bus
Current-limiting resistance is connected with the current-limiting resistance between all subcards and the asynchronous half-duplex bus.
Preferably, when current single board supports hot plug, the master control borad receives the response message, believes the response
Breath is verified；And all subcards receive the slot position querying command, carry out school to the slot position querying command
It tests.
Preferably, after being verified to the response message, further includes: the response message verification fails if it exists
Situation, the master control borad abandon the response message；After being verified to the slot position querying command, further includes: if it exists
The case where slot position querying command verification failure, the subcard abandon the slot position querying command of the verification failure.
Preferably, an at least bit check position is arranged in communication frame format of the master control borad with all subcards in transmission,
Verification operation is carried out using an at least bit check position.
Preferably, after the master control borad sends slot position querying command to all subcards by asynchronous half-duplex bus, also
Include: the master control borad output high-impedance state, discharges the asynchronous half-duplex bus.
Preferably, after the subcard transmission response message, further includes: the subcard exports high-impedance state, discharges described different
Walk half-duplex bus.
According to another aspect of the present invention, a kind of device that detection subcard is in place is provided, master control borad is set to, comprising:
Sending module, for sending slot position querying command to all subcards by asynchronous half-duplex bus, wherein the master control borad passes through
One asynchronous half-duplex bus is connect with all subcards；Determining module, for receiving the slot position in the given time
When the response message of the slot position feedback of querying command inquiry, determine that there are subcards in the slot position of the slot position querying command inquiry.
According to another aspect of the present invention, a kind of system that detection subcard is in place, including master control borad and at least one are provided
A subcard: the master control borad is connect by an asynchronous half-duplex bus at least one described subcard, for by described different
It walks half-duplex bus and sends slot position querying command to all subcards；The slot position querying command inquiry is received in the given time
Slot position feedback response message when, determine that there are subcards in the slot position of slot position querying command inquiry；It is described at least one
Subcard determines in the slot position of the slot position querying command inquiry there are when subcard, to institute for receiving the slot position querying command
It states master control borad and returns to response message.
In embodiments of the present invention, master control borad is connect by an asynchronous half-duplex bus with all subcards, and master control borad is logical
It crosses asynchronous half-duplex bus and sends slot position querying command to all subcards, if master control borad can receive slot position in the given time
When the response message of the slot position feedback of querying command inquiry, it is determined that there are subcards in the slot position of slot position querying command inquiry.That is,
In embodiments of the present invention, it is only necessary to an asynchronous half-duplex bus can vacate more signal wires and be used for transmission service signal,
Improve the transmission speed of service signal.Also, asynchronous half-duplex bus not on need to increase I2C control for each subcard
Device and isolator processed, reduce the use of hardware resource, also reduce the area occupied on PCB, increase the available face PCB
Product.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the conventional subcard according to the relevant technologies in position detecting method；
Fig. 2 is the I2C subcard according to the relevant technologies in position detecting method；
Fig. 3 is the process flow diagram of detection subcard according to an embodiment of the present invention method in place；
Fig. 4 is the subcard inspection method in place of embodiment two according to an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of detection subcard according to an embodiment of the present invention device in place；
Fig. 6 is the structural schematic diagram of detection subcard according to an embodiment of the present invention system in place.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
It mentions in the related technology, in conventional method shown in FIG. 1, each subcard passes through a signal wire and master control borad connects
It connects, subcard is used to notify whether master control board daughter card is in place plus pull-up resistor in the signal wire.The subcard that master control borad needs is examined in place
It is identical as the quantity of the supported subcard of system to survey signal wire quantity.In the method, it is more to detect the signal wire used, in signal
In the case that line total amount is fixed, the signal wire for being used for transmission service signal can be reduced, reduces business transmission speed.
In I2C bus method shown in Fig. 2, realizes that subcard detects in place using I2C bus, lead between master control borad and subcard
One group of I2C bus (I2C clock with data) is crossed to be connected, at the same master control borad and subcard all respectively need an I2C controller and every
From device.In the case that I2C controller and isolator are more, occupied using great amount of hardware resources, and in printed circuit board (PCB)
Very large area causes the utilizable area decline of PCB.
In order to solve the above technical problems, the embodiment of the invention provides a kind of method that detection subcard is in place, processing stream
Journey is as shown in Figure 3, comprising:
Step S302, master control borad sends slot position querying command to all subcards by asynchronous half-duplex bus；
Wherein, master control borad is connect by an asynchronous half-duplex bus with all subcards；
Step S304, master control borad receives the response message of the slot position feedback of slot position querying command inquiry in the given time
When, determine that there are subcards in the slot position of slot position querying command inquiry.
In embodiments of the present invention, master control borad is connect by an asynchronous half-duplex bus with all subcards, and master control borad is logical
It crosses asynchronous half-duplex bus and sends slot position querying command to all subcards, if master control borad can receive slot position in the given time
When the response message of the slot position feedback of querying command inquiry, it is determined that there are subcards in the slot position of slot position querying command inquiry.That is,
In embodiments of the present invention, it is only necessary to which an asynchronous half-duplex bus, the line that needs are occupied are minimized, and can be vacateed more
Signal wire is used for transmission service signal, improves the transmission speed of service signal.Also, asynchronous half-duplex bus not on need to be directed to
Each subcard increases an I2C controller and isolator, reduces the use of hardware resource, also reduces and occupy on PCB
Area, increase the available area of PCB.
In embodiments of the present invention, there is currently when multiple slot positions, master control borad can to whether there is in slot position subcard into
Row poll inquiry, that is, master control borad is looked by asynchronous half-duplex bus to the slot position that all subcard polls send the different slot positions of inquiry
Order is ask, is successively inquired in all slot positions with the presence or absence of subcard.
Further, in the method for two kinds of detection subcards that the relevant technologies provide, master control borad also needs in addition to provide one
A interface is used to inquire the board type of subcard, wastes hardware resource.And in embodiments of the present invention, it can add in response message
Add the relevant parameter of subcard, for example, daughter board information in place and subcard type can be fed back simultaneously in response message, to avoid
In addition one interface is provided, hardware resource is saved.
When current single board supports hot plug, it is connected with current-limiting resistance between master control borad and asynchronous half-duplex bus, all
It is connected with current-limiting resistance between subcard and asynchronous half-duplex bus, plays the role of insulation blocking.
I2C communications protocol does not have the verification to data integrity, correctness, and when current single board support hot plug, it needs
Plug operation is constantly carried out to subcard, this is easy for leading to communication data mistake.To solve this technical problem, the present invention is implemented
Example provides a kind of preferred processing method, that is, master control borad receives response message, verifies to response message, and master control
All subcards of plate connection receive slot position querying command, verify to slot position querying command.The embodiment of the invention provides
Verification to data integrity, correctness improves communication robustness.
If it exists the case where response message verification failure, master control borad abandons response message.Similarly, slot position inquiry is ordered if it exists
The case where enabling verification failure, subcard also abandons the slot position querying command of verification failure.
The mode of verification can there are many, it is preferred that can the communication frame format with master control borad with all subcards in transmission set
An at least bit check position is set, carries out verification operation using an at least bit check position for setting.
Since asynchronous half-duplex bus only has one, for the service efficiency for improving asynchronous half-duplex bus, master control borad
After sending slot position querying command to all subcards by asynchronous half-duplex bus, master control borad can export high-impedance state, discharge different
Walk half-duplex bus.Similarly, after subcard sends response message, subcard can export high-impedance state, discharge asynchronous half-duplex bus.
In summary, the embodiment of the present invention the technical problem to be solved is that: how to reduce master control borad for detecting subcard
Backplane interface signal in place, device needed for reducing improve communication robustness when single-plate hot-plug.For by the embodiment of the present invention
Detection subcard method in place is provided becomes apparent from clearer with illustrating, is now described with specific embodiment.
Embodiment one
The present embodiment uses following technical scheme:
Master control borad single line is connected with all subcards, which provides high level, master control borad and subcard by pull-up resistor
High resistant or low level two states can be exported, using the baud rate and data frame format of agreement, constitute one asynchronous half pair
Work bus.When needing support single-plate hot-plug, between master control and bus, upper limit leakage resistance can be gone here and there between subcard and bus
Device is added and is protected, while check bit is added in data frame format and tests to integrality, the correctness of data.
Solution provided in this embodiment comprises the following modules:
Master control borad poller module: on master control borad, for issuing polling message to subcard.I.e. master control borad issues poll letter
Breath.
Subcard responder module: on subcard, for the polling message to master control borad, (slot position that i.e. poll is sent inquires life
Enable) it responds.I.e. subcard carries out response to the polling message of master control borad.
And asynchronous half-duplex bus between the two, it is convenient hereinafter to illustrate, can directly be referred to as bus.
Detection subcard method in place is realized using above-mentioned module the following steps are included:
Step 1: master control borad is powered, master control borad poller module exports high-impedance state.
Step 2: subcard is powered, subcard responder module exports high-impedance state.
Step 3: master control borad poller module sends out No.1 slot position querying command to all subcards, include in querying command
Inquired slot position information.After having sent order, high-impedance state is exported immediately to discharge bus.
Step 4: being responded if No.1 slot position subcard is in place for the poll of master control borad.Response message may include son
Plate is in place and subcard type.After having sent response message, high-impedance state is exported immediately to discharge bus.
Step 5: if master control receives the response message of No.1 slot position subcard, then it is assumed that No.1 slot position is inserted with subcard, and remembers
Record the lower subcard type.If can not receive the response message of subcard within the designated time, then it is assumed that No.1 slot position does not have subcard.
Step 6: master control borad poller module sends out No. two slot position querying commands.
All slot positions are ceaselessly inquired repeatedly.
When needing support single-plate hot-plug, when master control or subcard receive order or information, need to order or letter
Breath is verified, and the order or information of verification failure should be abandoned.
The utility model has the advantages that the method in place using detection subcard provided in an embodiment of the present invention, is examined with subcard used at present
Survey technology is compared,
Compared with the subcard of Fig. 1 routine is in position detecting method, advantage has two: one, it is possible to reduce master control borad is for detecting
Subcard backplane interface signal in place is used for transmission service signal to vacate more signal wires；Second, being only capable of obtaining in conventional method
Subcard information whether in place, need to go to obtain subcard type information by other interfaces, this method can obtain simultaneously it is in place and
Subcard type information.
Compared with the I2C interface of Fig. 2, advantage has three: one, it is possible to reduce the necessary I2C isolator of I2C interface, we
Method only needs on each subcard plus a current-limiting resistance, reduces hardware cost and PCB layout area；Second, I2C is communicated
Agreement does not have the verification to data integrity, correctness, when plugging plate, is easy to cause communication data mistake, and our
Method provides the verification to data integrity, correctness, improves communication robustness；As long as third, this method single line, needing
The line of occupancy is minimized.
Embodiment two
In the present embodiment, it is detected using the module being the same as example 1.Master control borad poller module, subcard response
Module all uses CPLD (Complex Programmable Logic Device, programmable logic controller (PLC) part) to realize, master control
Plate is connected by an asynchronous half-duplex bus with all subcards, which is pulled upward to power supply, master control borad and son by a resistance
Card can export high resistant or low level two states, and communication frame format is that 1 bit low level indicates start bit, then 8 bit
Data and 1 data check bit, last 1 bit high level are stop position, and baud rate is about set to 115200bps, and communication process is adopted
It is carried out with " master control borad inquiry, subcard response " mode, guarantee will not conflict.Inquiry velocity quickly, for the system of 20 pieces of veneers
As long as 3 to 4 milliseconds can be completed inquiry.Integrality, the correctness of communication data are guaranteed that discovery verifies out by check bit
Mistake abandons the data and restarts inquiry.Master control borad poller module issues querying command first, and card receives the querying command of master control borad
Afterwards, then response message is issued to master control borad immediately, response message includes plate information in place and plate type information.
System has 1 to the total M slot position of M, if supporting A, B, C, D ... dry type subcard.Master control borad is issued to bus first
It inquires signal " 01 " (being hexadecimal code here), indicates whether No. 1 slot position of inquiry is inserted with subcard and subcard type.Assuming that 1
Number slot position has A class subcard in place, then the subcard first verifies the data received, abandons the number if verifying failure
According to otherwise reply " 0A ", indicates that No. 1 slot position is inserted with A class subcard；It is first after master control borad receives the response message of No. 1 slot position subcard
First data are verified, the data is abandoned if verifying failure, otherwise it is assumed that No. 1 slot position is inserted with subcard, and learns institute
Slotting is A class subcard.When No. 1 slot position does not insert subcard, then master control borad not will receive any response message at the appointed time,
Master control borad thinks that the slot position is not inserted with subcard.Then, as a same reason, master control borad issues querying command to No. 2 slot positions
" 02 " ... master control borad constantly issues polling message to each slot position and judges son according to the response situation of each slot position subcard
Whether card in place and its type.
Based on the same inventive concept, the embodiment of the invention also provides a kind of device that detection subcard is in place, it is set to master
Plate is controlled, structural schematic diagram is as shown in Figure 5, comprising:
Sending module 501, for sending slot position querying command to all subcards by asynchronous half-duplex bus, wherein main
Control plate is connect by an asynchronous half-duplex bus with all subcards；
Determining module 502 is coupled with sending module 501, for receiving the inquiry of slot position querying command in the given time
Slot position feedback response message when, determine slot position querying command inquiry slot position in there are subcards.
Based on the same inventive concept, the embodiment of the invention also provides a kind of system that detection subcard is in place, structure is shown
It is intended to as shown in fig. 6, including master control borad 601 and at least one subcard 602:
Master control borad 601 is connect by an asynchronous half-duplex bus at least one subcard 602, for passing through asynchronous half
Duplex bus sends slot position querying command to all subcards；The slot position for receiving the inquiry of slot position querying command in the given time is anti-
When the response message of feedback, determine that there are subcards in the slot position of slot position querying command inquiry；
At least one subcard 602 determines and exists in the slot position of slot position querying command inquiry for receiving slot position querying command
When subcard, response message is returned to master control borad 601.
It can be seen from the above description that the present invention realizes following technical effect:
In embodiments of the present invention, master control borad is connect by an asynchronous half-duplex bus with all subcards, and master control borad is logical
It crosses asynchronous half-duplex bus and sends slot position querying command to all subcards, if master control borad can receive slot position in the given time
When the response message of the slot position feedback of querying command inquiry, it is determined that there are subcards in the slot position of slot position querying command inquiry.That is,
In embodiments of the present invention, it is only necessary to an asynchronous half-duplex bus can vacate more signal wires and be used for transmission service signal,
Improve the transmission speed of service signal.Also, asynchronous half-duplex bus not on need to increase I2C control for each subcard
Device and isolator processed, reduce the use of hardware resource, also reduce the area occupied on PCB, increase the available face PCB
Product.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method that detection subcard is in place characterized by comprising
Master control borad sends slot position querying command to all subcards by asynchronous half-duplex bus, wherein the master control borad passes through one
Asynchronous half-duplex bus is connect with all subcards；
When the master control borad receives the response message of the slot position feedback of the slot position querying command inquiry in the given time, really
There are subcards in the slot position of the fixed slot position querying command inquiry；
Wherein, after the subcard transmission response message, further includes: the subcard exports high-impedance state, discharges described asynchronous half pair
Work bus.
2. the method according to claim 1, wherein the master control borad passes through asynchronous half-duplex bus to all sons
Card sends slot position querying command, comprising:
The master control borad sends the slot position for inquiring different slot positions by the asynchronous half-duplex bus to all subcard polls
Querying command is successively inquired in all slot positions with the presence or absence of subcard.
3. the method according to claim 1, wherein the response message includes: daughter board information in place and described
Subcard type.
4. the method according to claim 1, wherein current single board support hot plug when, the master control borad with
It is connected with current-limiting resistance between the asynchronous half-duplex bus, is contacted between all subcards and the asynchronous half-duplex bus
There is the current-limiting resistance.
5. the method according to claim 1, wherein the master control borad receives when current single board supports hot plug
To the response message, the response message is verified；And all subcards receive the slot position inquiry life
It enables, the slot position querying command is verified.
6. according to the method described in claim 5, it is characterized in that,
After being verified to the response message, further includes: if it exists the case where the response message verification failure, the master
It controls plate and abandons the response message；
After being verified to the slot position querying command, further includes: the feelings of the slot position querying command verification failure if it exists
Condition, the subcard abandon the slot position querying command of the verification failure.
7. method according to any one of claims 1 to 6, which is characterized in that the master control borad and all subcards exist
An at least bit check position is arranged in the communication frame format of transmission, carries out verification operation using an at least bit check position.
8. method according to any one of claims 1 to 6, which is characterized in that the master control borad is total by asynchronous half-duplex
Line is sent to all subcards after slot position querying command, further includes: the master control borad exports high-impedance state, discharges described asynchronous half pair
Work bus.
9. a kind of device that detection subcard is in place, which is characterized in that be set to master control borad, comprising:
Sending module, for sending slot position querying command to all subcards by asynchronous half-duplex bus, wherein the master control borad
It is connect by an asynchronous half-duplex bus with all subcards；
Determining module, the response message of the slot position feedback for receiving the slot position querying command inquiry in the given time
When, determine that there are subcards in the slot position of the slot position querying command inquiry；
Wherein, after the subcard sends response message, the subcard exports high-impedance state, discharges the asynchronous half-duplex bus.
10. a kind of system that detection subcard is in place, which is characterized in that including master control borad and at least one subcard:
The master control borad is connect by an asynchronous half-duplex bus at least one described subcard, for by described asynchronous
Half-duplex bus sends slot position querying command to all subcards；The slot position querying command inquiry is received in the given time
When the response message of slot position feedback, determine that there are subcards in the slot position of the slot position querying command inquiry；
At least one described subcard determines the slot position of the slot position querying command inquiry for receiving the slot position querying command
In there are when subcard, return to response message to the master control borad；
Wherein, after the subcard sends response message, the subcard exports high-impedance state, discharges the asynchronous half-duplex bus.
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| CN103500148B (en) * | 2013-10-18 | 2016-05-18 | 深圳市新格林耐特通信技术有限公司 | A kind of main control card reads the apparatus and method of service line Card Type |
| 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 |
| 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 |
| 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 |
| 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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| CN101883036A (en) * | 2010-06-25 | 2010-11-10 | 上海铁大电信设备有限公司 | Method for converting multi-path RS485 bus into CAN (Controller Area Network) bus in the manner of self-adapting |
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| CN103186440A (en) | 2013-07-03 |
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