CN107957969A - Judge the method for equipment connection status and device type - Google Patents
Judge the method for equipment connection status and device type Download PDFInfo
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- CN107957969A CN107957969A CN201610901247.XA CN201610901247A CN107957969A CN 107957969 A CN107957969 A CN 107957969A CN 201610901247 A CN201610901247 A CN 201610901247A CN 107957969 A CN107957969 A CN 107957969A
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- Prior art keywords
- equipment
- device type
- address
- data
- connection status
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0016—Inter-integrated circuit (I2C)
Abstract
A kind of method for judging equipment connection status and device type, is implemented and is comprised the steps of by a processing unit：(A) multiple inquiry requests are respectively transmitted to multiple address of an IC bus, to confirm whether each address is connected with any appliance；And (B) when receiving from the reply message of at least equipment of at least one for being correspondingly connected to such address, an at least address of the reply message corresponding to an at least equipment and its corresponding device type are compared according to a look-up table, to compare out the device type of an at least equipment of a corresponding at least address, the wherein look-up table corresponds respectively to multiple by least one address set formed with reference to address comprising multiple equipment type.
Description
Technical field
The invention relates to a kind of method for judging equipment connection status and device type, particularly relates to a kind of for collecting
Into the method for the judgement equipment connection status and device type of circuit bus.
Background technology
Integrated circuit (Inter-Integrated Circuit, abbreviation I2C) bus is by data line SDA（Serial
Data Line）With clock SCL（Serial Clock Line）The serial bus of composition, can be transmitted and receive data.Various moulds
Block circuit is connected in parallel in this bus, and each circuit and module have unique address, have only through address could with it is specific
Modular circuit linked up.In the transmitting procedure of information, in I2C buses and each modular circuit for connecing is both main controller
（Or controlled device）, and be transmitter（Or receiver）, this depends on its function to be completed.In general, by processing unit
The control signal sent is divided into address code and controlled quentity controlled variable two parts, and address code is used for addressing, that is, connects the module for needing to control
Circuit, determines the species of control；Controlled quentity controlled variable determines the classification of the adjustment（Such as contrast, brightness）And need the amount adjusted.So
And if being connected with which equipment in I2C buses to be learnt, existing method needs to obtain which equipment circuit diagram can just learn
It is connected I2C buses.
However, circuit diagram is often before equipment has actually been connected I2C buses, i.e., cooked up in advance, but it is actual
The equipment for being connected to I2C buses not necessarily can be according to the programming of circuit diagram originally, therefore after circuit diagram is obtained, need confirm electricity
Whether the figure indicated I2C buses address for being connected with an equipment in road is connected with an equipment really, such as is indicated in circuit diagram
I2C bus address 0x01 0xa0 are connected with can make carbon copies read-only storage just like the electronics formula of erasing（Electrically
Erasable Programmable Read Only Memory, EEPROM）In the case of equipment.If it is intended to confirm a certain address
Such as, 0x01 0xa0（That is, the address 0xa0 of bus 1）When whether being connected with an equipment really, it can be transmitted by a processing unit
One instructs such as comprising a wisdom Platform Management Interface (Intelligent Platform Management Interface),
The inquiry request of ipmitool raw 0x06 0x52 0x01 0xa0 0x01 0x00 is to being connected to I2C bus address 0x01
The equipment of 0xa0.If the processing unit receives from I2C bus address 0x01 0xa0 and is correspondingly connected to I2C bus address 0x01
During the reply message of the equipment of 0xa0, which determines I2C bus address 0x01 0xa0 and is connected with one really and set
It is standby.If the processing unit from I2C buses address 0x01 0xa0 without receive it is any reply message when, the processing unit i.e. judge
Go out I2C bus address 0x01 0xa0 and be not connected with any equipment.
However, above-mentioned instructed using wisdom Platform Management Interface to carry out confirmation method, only can confirm that indicated by circuit diagram
The I2C buses address for being connected with an equipment whether be connected with an equipment really, it is connectionless can not but to confirm that circuit diagram indicates
The whether certain connectionless equipment of the I2C buses address of one equipment.Therefore, in order to make the reality of circuit diagram and follow-up I2C buses
Connection status is consistent, equipment have to be connected to I2C buses completely in accordance with the programming of circuit diagram originally, consequently, it is possible to will cause
The connection of follow-up equipment loses the elasticity of change, real to belong to inconvenience.In addition, for confirming to be connected with an equipment indicated by circuit diagram
I2C buses address whether be connected with really an equipment the wisdom Platform Management Interface instruction not only must include one must read-write refer to
Kenel (e.g., 0x06 0x52), an inquiry address (e.g., 0x01 0xa0) and a passback request (e.g., 0x01) are made, must also include connecting
It is connected to an instruction set (e.g., 0x00) for the equipment of the inquiry address.That is, the user must be in advance using circuit diagram come the company of learning
A device type of the equipment of the inquiry address is connected to, can just be included corresponding to using processing unit transmission according to the device type
In the wisdom Platform Management Interface instruction of the instruction set of the device type, whether the inquiry address for confirmation connects really
There is an equipment, also fall within inconvenience.
The content of the invention
Therefore, the purpose of the present invention, i.e., provide a kind of elastic judgement equipment connection status for promoting equipment connection and
The method of device type.
Then, present invention determine that the method for equipment connection status and device type, is implemented, and wrap by a processing unit
Containing following steps：
(A) multiple inquiry requests are respectively transmitted to multiple address of an IC bus, to confirm whether each address connects
There is any appliance；And
(B) when receiving from the reply message of at least equipment of at least one for being correspondingly connected to such address, according to
One look-up table compares an at least address of the reply message corresponding to an at least equipment and its corresponding device type, with
The device type of an at least equipment of a corresponding at least address is compared out, the wherein look-up table includes multiple equipment type point
Dui Yingyu not be multiple by least one address set formed with reference to address.
The effect of of the invention, is：By the processing unit, just transmission is more after equipment has been connected IC bus
A inquiry request to the IC bus such address, to judge the equipment for being connected to equipment on the IC bus
Type, thereby, the connection of follow-up equipment are not necessary to connect completely in accordance with the programming of circuit diagram originally, thus can promote and subsequently set
The elasticity of standby connection, in addition, the processing unit extremely should in the inquiry request of transmission comprising wisdom Platform Management Interface instruction
During each address of IC bus, it is not required in advance to know a device type of the equipment for being connected to the inquiry address.
【Brief description of the drawings】
Fig. 1 is a flow chart, is illustrated present invention determine that one in the embodiment of the method for equipment connection status and device type sets
Standby type alignment programs；And
Fig. 2,3 and 4 ordinatedly illustrate present invention determine that one in the embodiment of the method for equipment connection status and device type sets
Standby type approval program.
【Embodiment】
Illustrate the embodiment present invention determine that the method for equipment connection status and device type below in conjunction with institute's accompanying drawings, this
A device type alignment programs and a device type are implemented and sequentially included to embodiment by a processing unit (not shown)
Proving program.
Refering to Fig. 1, which implements present invention determine that the equipment class of the method for equipment connection status and device type
Type alignment programs.The device type alignment programs of the method for the judgement equipment connection status and device type illustrate how to obtain
The device type of the equipment of an IC bus is connected to, and is comprised the steps of.
In a step 11, which is respectively transmitted multiple inquiry requests to multiple address of the IC bus,
To confirm whether each address is connected with any appliance.If a certain address is connected with an equipment, which can send back should
In an inquiry request reply message to the processing unit.Such address is, for example, all address (that is, position of bus 1 of bus
Location 0x00 ~ address 0xfe), thereby, which can confirm the connection status of all address of bus.Each inquiry request
Comprising a wisdom Platform Management Interface (Intelligent Platform Management Interface) instruction such as,
ipmitool raw 0x06 0x52 0x01 0xa0 0x01.Each wisdom Platform Management Interface instruction includes a palpus read-write and refers to
Make kenel (e.g., 0x06 0x52), an inquiry address (e.g., the one of which of address 0x01 0x00 ~ address 0x01 0xfe) and one
Passback request (e.g., 0x01), and not comprising an instruction set of the equipment for being connected to the inquiry address.
In step 12, when the processing unit is received from being correspondingly connected at least one at least the one of such address
During the reply message of equipment, the processing unit according to a look-up table compare corresponding to an at least equipment reply message this extremely
A few address and its corresponding device type, to compare out the equipment class of an at least equipment of a corresponding at least address
Type, the wherein look-up table correspond respectively to multiple by least one address set formed with reference to address comprising multiple equipment type.
Each reply message in response to the inquiry request only includes the data of 1byte.Table 1 is an exemplary look-up table.
| Address set | Device type |
| 0x36、0x66、0xa6 | Peripheral element interconnection solid state hard disc (Peripheral component interconnect express solid state drive, abbreviation PCIe SSD) |
| 0xa0、0xb0 | Power-supply unit (Power supply unit, abbreviation PSU) |
| 0xa0 | Can field replacement unit (Field replacement unit, abbreviation FRU) |
| 0xb0 | Power-supply unit (PSU) |
| 0x98 | Temperature sensor |
| 0xE0 | Multiplexer (Multiplexer, abbreviation MUX) |
Table 1
It is noted that at least address for all corresponding to the reply message of an at least equipment all can be with the look-up table
Compare.In the present embodiment, it is corresponding with and at most enjoys highest comparison cis-position with reference to the address set of address, is corresponding with minimum ginseng
The address set for examining address enjoys minimum comparison cis-position.For example, if an at least address for 0xa0,0xb0,0x36,
0x66,0xa6, the processing unit is according to an at least address (0xa0,0xb0,0x36,0x66,0xa6) and the look-up table (table
1) it is PCIe SSD, to compare out 0x36,0x66,0xa6, and compares out 0xa0,0xb0 PSU, therefore, this at least one corresponding
The device type of an at least equipment of location (0xa0,0xb0,0x36,0x66,0xa6) is PCIe SSD, PSU.The processing list
Member at most enjoys highest comparison cis-position when 0xa0,0xb0 is compared, due to being corresponding with reference to the address set of address, should
Processing unit can be compared preferentially with 2 address set 0xa0,0xb0 with reference to address, without by 0xa0,0xb0 with only having
There is the 1 address set 0xa0 and address set 0xb0 with reference to address to compare, therefore the processing unit can compare out 0xa0,0xb0 is
The comparison result of the device type of PSU.
Refering to Fig. 2, Fig. 3 and Fig. 4, which implements present invention determine that the method for equipment connection status and device type
Device authentication program, to verify whether the device type that the device type alignment programs compare out correct, and comprising following
Step.It is noted that probably there is erroneous judgement in the device type that the device type alignment programs compare out, thus, it must pass through
The device authentication program come verify that the device type alignment programs compare out be correspondingly connected to an at least address this extremely
Whether the device type of few equipment is correct, and thereby, which can confirm that the device type alignment programs compare out
All at least equipment that an address is connected for being connected with equipment device type it is whether correct.
In step 201, for each at least equipment for being correspondingly connected to an at least address, the processing list
Member judges whether the device type of the equipment belongs to one first device category.When the device type for determining the equipment belong to this
During one device category, step 202 is carried out.Otherwise, flow carries out step 208.In the present embodiment, which includes
The device type of one power-supply unit (PSU), but not limited to this.
In step 202, which transmits each address that an equipment data asks to be connected to the equipment.
In step 203, when the processing unit receives the equipment data of each address connected from the equipment,
The processing unit judges whether the equipment data corresponding to each address is all coincident with and is relevant in first device category with being somebody's turn to do
First preset knowledge of the identical device type of the device type of equipment.When determining the equipment data, to be coincident with this first default
During data, step 204 is carried out.Otherwise, flow carries out step 205.
It is noted that the equipment data for each address that the processing unit system is connected by judging the equipment whether
All meet first preset knowledge, to verify whether the equipment is correct in the device type that step 12 is compared out.When determining
When equipment data corresponding to each address all meets the preset knowledge, device type quilt which is compared out in step 12
It is verified as correct；Otherwise, which is verified as endless total correctness in the device type that step 12 is compared out.
In step 204, which stores device type that the equipment is compared out in step 12 and its corresponding
An equipment table of comparisons of the address collection together in a storage element for being electrically connected the processing unit.
In step 205, whether the equipment data which judges not being coincident with first preset knowledge is all consistent
In be relevant to one can field replacement unit (FRU) device type the second preset knowledge.When determine be not coincident with this first
When the equipment data of preset knowledge is all coincident with second preset knowledge, step 206 is carried out.Otherwise, flow carries out step 207.
It is noted that the processing unit system by judge be not coincident with first preset knowledge equipment data whether
Be coincident with second preset knowledge, with verify the address corresponding to the equipment data for not being coincident with first preset knowledge company
The device type of the equipment connect whether be this can field replacement unit device type.When determining, not to be coincident with this first default
When the equipment data of data is coincident with second preset knowledge, be not coincident with first preset knowledge equipment data it is corresponding it
The device type for the equipment that address connects be verified as this can field replacement unit device type；Otherwise, it is not coincident with
The device type for the equipment that the corresponding address of the equipment data of first preset knowledge connects is verified as not being that this can
The device type of field replacement unit, nor the device type being compared out in step 12.Institute's illustrated example before continuity,
The comparison of an at least address (0xa0,0xb0,0x36,0x66,0xa6) through step 12 can compare out 0x36,0x66,0xa6 and be
PCIe SSD, and the comparison result that 0xa0,0xb0 are PSU.In general, 0xa0,0xb0 have very high probability to connect PSU,
But actual connection is also likely to be 0xa0 connection FRU, and 0xb0 connection PSU, therefore, by judging that the equipment is connected
The equipment data of each address such as 0xa0,0xb0 whether all meet first preset knowledge, you can whether verification 0xa0,0xb0
Really all it is connection PSU.If it is determined that the equipment data for going out address 0xa0 is coincident with second preset knowledge, and address 0xb0 is set
Standby data is coincident with first preset knowledge, then the device type for the equipment that address 0xa0 is connected is FRU, address 0xb0 institutes
The device type of the equipment of connection is PSU.
In step 206, processing unit storage is coincident with the address corresponding to the equipment data of first preset knowledge
The device type that the equipment connected is compared out in step 12, and its be coincident with first preset knowledge equipment data institute it is right
The address answered, and be coincident with the equipment that the address corresponding to the equipment data of second preset knowledge connects and be verified as this
Can field replacement unit device type, and its be coincident with the corresponding address of equipment data of second preset knowledge and set in this
The standby table of comparisons.
In step 207, processing unit storage is coincident with the address corresponding to the equipment data of first preset knowledge
The device type that the equipment connected is compared out in step 12, and its be coincident with first preset knowledge equipment data institute it is right
The address answered, and be coincident with the equipment that the address corresponding to the equipment data of second preset knowledge connects and be verified as this
Can field replacement unit device type, and its be coincident with the corresponding address of equipment data of second preset knowledge, without
Storage is not coincident with the equipment that the address corresponding to the equipment data of first preset knowledge and second preset knowledge connects
The device type being compared out in step 12 and its corresponding address are in the equipment table of comparisons.
In a step 208, which judges whether the device type of the equipment belongs to one second device category.When sentencing
When making the device type of the equipment and belonging to second device category, step 209 is carried out.Otherwise, flow carries out step 213.
In the present embodiment, second device category include a peripheral element interconnection solid state hard disc (PCIe SSD) device type and one can
At least one of which of the device type of field replacement unit (FRU), but not limited to this.
In step 209, which transmits an equipment data and asks to the equipment.
In step 210, when the processing unit receives the equipment data from the equipment, which judges should
Whether equipment data, which is coincident with, is relevant to the of device type identical with the device type of the equipment in second device category
Three preset knowledges.When determining the equipment data and being coincident with three preset knowledges, step 211 is carried out.Otherwise, flow carries out
Step 212.
It is noted that the processing unit system is by judging whether the equipment data meets the 3rd preset knowledge, with
Verify whether the equipment is correct in the device type that step 12 is compared out.When determining the equipment data, to meet the 3rd default
During data, which is verified as correctly in the device type that step 12 is compared out；Otherwise, which is compared in step 12
The device type gone out is verified as incorrect.
In step 211, which stores device type that the equipment is compared out in step 12 and its corresponding
Address collection is together in the equipment table of comparisons.
In the step 212, which does not store the device type and its correspondence that the equipment is compared out in step 12
Address collection together in the equipment table of comparisons.
In step 213, which judges whether the device type of the equipment belongs to one the 3rd device category.When sentencing
When making the device type of the equipment and belonging to three device categories, step 214 is carried out.Otherwise, flow carries out step 218.
In the present embodiment, the 3rd device category includes the device type of a temperature sensing unit, but not limited to this.
In step 214, which transmits an equipment data and asks to the equipment.
In step 215, when the processing unit receives the equipment data from the equipment, which judges should
Whether equipment data meets a preset knowledge form.When determining the equipment data and meeting the preset knowledge form, walked
Rapid 216.Otherwise, flow carries out step 217.
It is noted that the processing unit system is by judging whether the data formats of the equipment data meet the default money
Form is expected, to verify whether the equipment is correct in the device type that step 12 is compared out.When the money for determining the equipment data
When material form meets the preset knowledge form, which is verified as correctly in the device type that step 12 is compared out；Otherwise,
The equipment is verified as incorrect in the device type that step 12 is compared out.
In the step 216, which stores device type that the equipment is compared out in step 12 and its corresponding
Address collection is together in the equipment table of comparisons.
In step 217, which does not store the device type and its correspondence that the equipment is compared out in step 12
Address collection together in the equipment table of comparisons.
In step 218, which judges whether the device type of the equipment belongs to one the 4th device category.When sentencing
When making the device type of the equipment and belonging to four device categories, step 219 is carried out.Otherwise, flow carries out step 222.
In the present embodiment, the 4th device category includes the device type of a multiplexer (MUX), but not limited to this.
In step 219, which judges whether the one of which of multiple output ports of the equipment is connected with and appoints
One device.When determining the one of which for belonging to such output port and being connected with any device, step 220 is carried out.Otherwise, flow
Cheng Jinhang steps 221.
It is noted that the processing unit system is by judging it is any whether the one of which of such output port is connected with
Device, to verify whether the equipment is correct in the device type that step 12 is compared out.When determine such output port its
When middle one is connected with any device, which is verified as correctly in the device type that step 12 is compared out；Otherwise, this sets
The standby device type being compared out in step 12 is verified as incorrect.
In a step 220, which stores device type that the equipment is compared out in step 12 and its corresponding
Address collection is together in the equipment table of comparisons.
In step 221, which does not store the device type and its correspondence that the equipment is compared out in step 12
Address collection together in the equipment table of comparisons.
In step 222, the processing unit do not store be not belonging to first device category, second device category, this
The device type and its corresponding address collection that the equipment of three device categories and the 4th device category is compared out in step 12
Together in the equipment table of comparisons.
In conclusion present invention determine that the method for equipment connection status and device type, by the processing unit in equipment
It has been connected and multiple inquiry requests is just transmitted after IC bus to such address of the IC bus, judges to connect
The device type for the equipment being connected on the IC bus, thereby, the connection of follow-up equipment are not necessary to completely in accordance with electric originally
The programming of road figure connects, thus can promote the elasticity of follow-up equipment connection, in addition, the processing unit includes the wisdom in transmission
Platform Management Interface instruction the inquiry request to the IC bus each address when, be not necessary to learn being connected to this in advance
Inquire a device type of the equipment of address, furthermore, which can also be by performing the proving program, should with verification basis
Whether the device type that an at least address and the look-up table compare out is correct, and then obtains the high equipment control of accuracy
Table, therefore the purpose of the present invention can be reached really.
Above in conjunction with attached drawing to the present invention embodiment and embodiment elaborate, but cannot with restriction
The scope of the present invention, the impartial modification and transformation made in scope of the present invention patent, should all belong to patent of the present invention
In the range of.
Claims (10)
1. a kind of method for judging equipment connection status and device type, is implemented by a processing unit, it is characterised in that：Bag
Containing following steps：
(A) multiple inquiry requests are respectively transmitted to multiple address of an IC bus, to confirm whether each address connects
There is any appliance；And
(B) when receiving from the reply message of at least equipment of at least one for being correspondingly connected to such address, according to
One look-up table compares an at least address of the reply message corresponding to an at least equipment and its corresponding device type, with
The device type of an at least equipment of a corresponding at least address is compared out, the wherein look-up table includes multiple equipment type point
Dui Yingyu not be multiple by least one address set formed with reference to address.
2. the method according to claim 1 for judging equipment connection status and device type, it is characterised in that：In step
(B) in, it is corresponding with and at most enjoys highest comparison cis-position with reference to the address set of address, is corresponding with the minimum address for referring to address
Set enjoys minimum comparison cis-position.
3. the method according to claim 1 for judging equipment connection status and device type, it is characterised in that：In step
(A) in, each inquiry request is instructed comprising a wisdom Platform Management Interface.
4. the method according to claim 3 for judging equipment connection status and device type, it is characterised in that：In step
(A) in, wisdom Platform Management Interface instruction includes a palpus read write command kenel, an inquiry address and a passback request, without
An instruction set comprising the equipment for being connected to the inquiry address.
5. the method according to claim 1 for judging equipment connection status and device type, it is characterised in that：In step
(B) after, also comprise the steps of：
(C) for each of an at least equipment, judge whether the device type of the equipment belongs to one first device category, should
First device category includes the device type of a power-supply unit；
(D) when the device type for determining the equipment belongs to first device category, one equipment data of transmission asks to this to set
The standby each address connected；And
(E) when receiving the equipment data of each address connected from the equipment, setting corresponding to each address is judged
Whether standby data, which is all coincident with, is relevant to the of device type identical with the device type of the equipment in first device category
One preset knowledge；
Wherein, when determining the equipment data corresponding to each address and being all coincident with first preset knowledge, the equipment is in step
Suddenly the device type that (B) is compared out is verified as correctly.
6. the method according to claim 5 for judging equipment connection status and device type, is characterized in that：Step
(E) after, also comprise the steps of：
(F) when determining that the equipment data corresponding to each address is non-to be all coincident with first preset knowledge, judgement is not consistent
In the equipment data of first preset knowledge whether be coincident be relevant to one can field replacement unit device type it is second pre-
If data；And
(G) when determining the equipment data for not being coincident with first preset knowledge and being coincident with second preset knowledge, it is not consistent
The device type for the equipment that the address corresponding to equipment data in first preset knowledge connects, which is verified as this, to be showed
The device type of field displacement unit.
7. the method according to claim 1 for judging equipment connection status and device type, it is characterised in that：In step
(B) after, also comprise the steps of：
(H) for each of an at least equipment, judge whether the device type of the equipment belongs to one second device category, should
Second device category includes the device type of a peripheral element interconnection solid state hard disc, and one can field replacement unit device type
At least one of which；
(I) when the device type for determining the equipment belongs to second device category, one equipment data of transmission asks to this to set
It is standby；And
(J) when receiving the equipment data from the equipment, judge whether the equipment data is coincident with and be relevant to this and second set
3rd preset knowledge of the device type identical with the device type of the equipment in the class that makes preparations for sowing；
Wherein, when determining the equipment data and being coincident with three preset knowledges, which sets what step (B) was compared out
Standby type is verified as correctly.
8. the method according to claim 1 for judging equipment connection status and device type, it is characterised in that：In step
(B) after, also comprise the steps of：
(K) for each of an at least equipment, judge whether the device type of the equipment belongs to one the 3rd device category, should
3rd device category includes the device type of a temperature sensing unit；
(L) when the device type for determining the equipment belongs to three device categories, one equipment data of transmission asks to this to set
It is standby；And
(M) when receiving the equipment data from the equipment, judge whether the equipment data meets one and be relevant to the 3rd and set
The preset knowledge form of the device type identical with the device type of the equipment in the class that makes preparations for sowing；
Wherein, when determining the equipment data and meeting the preset knowledge form, equipment which is compared out in step (B)
Type is verified as correctly.
9. the method according to claim 1 for judging equipment connection status and device type, it is characterised in that：In step
(B) after, also comprise the steps of：
(N) for each of an at least equipment, judge whether the device type of the equipment belongs to one the 4th device category,
4th device category includes the device type of a multiplexer；And
(O) when the device type for determining the equipment belongs to four device categories, multiple output ports of the equipment are judged
One of which whether be connected with any device；
Wherein, when the one of which for determining such output port is connected with any device, which is compared in step (B)
The device type gone out is verified as correctly.
10. the method according to claim 1 for judging equipment connection status and device type, it is characterised in that：In step
(B) in, each reply message in response to the inquiry request only includes the data of 1 byte.
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| CN201610901247.XA CN107957969B (en) | 2016-10-17 | 2016-10-17 | Method for judging device connection state and device type |
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|---|---|---|---|
| CN201610901247.XA CN107957969B (en) | 2016-10-17 | 2016-10-17 | Method for judging device connection state and device type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112579116A (en) * | 2019-09-29 | 2021-03-30 | 佛山市顺德区顺达电脑厂有限公司 | Control method for updating firmware remotely |
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| CN107957969B (en) | 2021-11-16 |
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