CN103532621A - PCIe equipment and in-place detection method of PCIe equipment - Google Patents
PCIe equipment and in-place detection method of PCIe equipment Download PDFInfo
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- CN103532621A CN103532621A CN201310512122.4A CN201310512122A CN103532621A CN 103532621 A CN103532621 A CN 103532621A CN 201310512122 A CN201310512122 A CN 201310512122A CN 103532621 A CN103532621 A CN 103532621A
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Abstract
The embodiment of the invention provides PCIe (Peripheral Component Interconnect Express) equipment, and an in-place detection method of the PCIe equipment. The method comprises the steps that first PCIe equipment detects that a first optical module receives M optical signals sent by a second optical module, wherein the first optical module is connected with the first PCIe equipment, the second optical module is connected with second PCIe equipment, and the first optical module is connected with the second optical module by an optical fiber; and the first PCIe equipment determines the second PCIe equipment in place according to the received M optical signals, wherein M is a positive integer.
Description
Technical field
The embodiment of the present invention relates to the communication technology, relates in particular to a kind of PCIe equipment at position detecting method and PCIe equipment.
Background technology
Optical Fiber Transmission has that transmission bandwidth is high, transmission range is long, and the advantage such as connect up flexible, has been applied to multiple high-speed bus at present.(Peripheral Component Interconnect Express, is called for short: PCIe) signal is a kind of high speed signal of main flow peripheral component interconnect path, and Optical Fiber Transmission is applied to the trend that PCIe signal is this area development.Each port of the receiver of PCIe or transmitter is generally comprised of one or more paths (Lane), and according to current PCIe standard, a port can comprise at most 32 Lane, be described as: PCIe Xn, wherein, X represents " taking advantage of ", and n represents the number of Lane, common PCIe chip is generally PCIe X1, PCIe X2, PCIe X4, PCIe X8, PCIe X16, PCIe X32.According to existing PCIe agreement, by the charging interval of link that PCIe receiver is connected, detect the whether available situation of Lane of opposite end PCIe chip.Yet during due to employing Optical Fiber Transmission PCIe signal, owing to there being the intervention of optical module and optical fiber, what be connected with PCIe receiver is optical module, receiver by discharge and recharge that time detecting arrives just and the optical module of its docking whether available, whether and it is in place the receiver of opposite end PCIe equipment really to be detected.
In prior art, by being connected a field programmable gate array between PCIe chip and optical module, (Field Programmable Gate Array is called for short, FPGA) chip, be used for simulating PCIe logic, so that the detection of PCIe chip (Detect) state machine is closed, or the characteristic of utilizing some PCIe chip support that Detect state machine is closed, active detecting (Detect.Active) state that PCIe is consulted in flow process is skipped, skip the process of PCIe detection in place, carry out off-gauge PCIe and consult flow process.
Therefore prior art needs extra chips, realizes complexity, and cost is higher.
Summary of the invention
The embodiment of the present invention provides a kind of PCIe equipment at position detecting method and PCIe equipment.
First aspect, the embodiment of the present invention provides a kind of PCIe equipment at position detecting method, comprising:
The one PCIe equipment Inspection the first optical module receives the M road light signal that the second optical module sends; Wherein, described the first optical module and a described PCIe equipment connection, described the second optical module and the 2nd PCIe equipment connection, described the first optical module is connected by optical fiber with described the second optical module;
A described PCIe equipment, according to the M road light signal receiving, determines that described the 2nd PCIe equipment is in place, and wherein, M is positive integer.
In the possible implementation of the first of first aspect, also comprise:
A described PCIe equipment determines that according to described M road light signal described the 2nd PCIe equipment has M road available passageway;
A described PCIe equipment is determined the standard vias number of described the 2nd PCIe equipment according to described M road available passageway.
The implementation possible according to the first of first aspect, in the possible implementation of the second, when 2
n≤ M < 2
n+1time, the described standard vias number of determining described the 2nd PCIe equipment according to described M road available passageway, is specially, and the standard vias number of determining described the 2nd PCIe equipment is 2
n, wherein, n is integer, and n>=0.
The implementation possible according to the second of first aspect, in the third possible implementation, described according to described M road available passageway, determine the standard vias number of described the 2nd PCIe equipment after, also comprise:
A described PCIe equipment is according to the standard vias number of described the 2nd PCIe equipment and described the 2nd PCIe devices communicating.
According to the second of first aspect or the third possible implementation, in the 4th kind of possible implementation, the standard vias number of a described PCIe equipment is 2
r, wherein r is integer, r>=0, and 2r>=M, and described method also comprises: when 2
rwhile being greater than M, by (2 of a described PCIe equipment
r-2
n) road path is set to electric idle condition.
According to any one in four kinds of possible implementations of the first to the of first aspect, first aspect, in the 5th kind of possible implementation, described the second optical module sends M road light signal by described the 2nd PCIe device trigger.
Second aspect, the embodiment of the present invention provides a kind of peripheral component interconnect path PCIe equipment, comprising:
Optical signal detecting module, receives for detection of the first optical module the M road light signal that the second optical module sends; Wherein, described the first optical module and a PCIe equipment connection, described the second optical module and the 2nd PCIe equipment connection, described the first optical module is connected by optical fiber with described the second optical module;
Processing module, for according to the M road light signal receiving, determines that described the 2nd PCIe equipment is in place, and wherein, M is positive integer.
In the possible implementation of the first of second aspect, described processing module also for:
According to described M road light signal, determine that described the 2nd PCIe equipment has M road available passageway;
According to described M road available passageway, determine the standard vias number of described the 2nd PCIe equipment.
The implementation possible according to the first of second aspect, in the possible implementation of the second, described processing module specifically for:
When 2
n≤ M < 2
n+1time, the standard vias number of determining described the 2nd PCIe equipment is 2
n, wherein, n is integer, and n>=0.
The implementation possible according to the second of second aspect, in the third possible implementation, described path also comprises:
Transceiver module, for after described processing module is determined the standard vias number of described the 2nd PCIe equipment according to described M road available passageway, according to the standard vias number of described the 2nd PCIe equipment and described the 2nd PCIe devices communicating.
According to the second of second aspect or the third possible implementation, in the 4th kind of possible implementation, the standard vias number of a described PCIe equipment is 2r, and wherein r is integer, r>=0, and 2
r>=M, described processing module also for: when 2
rwhile being greater than M, by (2 of a described PCIe equipment
r-2
n) road path is set to electric idle condition.
According to any one in four kinds of possible implementations of the first to the of second aspect, second aspect, in the 5th kind of possible implementation, described the second optical module sends M road light signal by described the 2nd PCIe device trigger.
The PCIe equipment that the embodiment of the present invention provides is at position detecting method and PCIe equipment, by PCIe equipment Inspection first optical module, receive the M road light signal that the second optical module sends, determine that described the 2nd PCIe equipment is in place, implementation is simple, thereby having solved prior art carries out the detection in place of the 2nd PCIe equipment and needs extra chips, realize complexity, the problem that cost is higher.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is for adopting the structural representation of the PCIe system of Optical Fiber Transmission;
Fig. 2 is the flow chart of PCIe apparatus of load detection method embodiment mono-of the present invention;
Fig. 3 is the flow chart of PCIe apparatus of load detection method embodiment bis-of the present invention;
Fig. 4 is the structural representation of PCIe apparatus embodiments one of the present invention;
Fig. 5 is the structural representation of PCIe apparatus of load detection system embodiment of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In each embodiment of the present invention, PCIe equipment can be PCIe interchanger (PCIe Switch), can be also other PCIe equipment.
Because PCIe equipment is standard device, conventionally path (Lane) number of PCIe is standard vias number, also the specification that is PCIe equipment is standard specification, and the standard specification of PCIe equipment is expressed as X1, X2 conventionally, X4, X8, X16, X32, the standard vias number that represents respectively PCIe equipment is 1,2,4,8,16,1 path of 32, PCIe equipment comprises transmission logic (send link, be expressed as Tx) and receive logic (receiver, be expressed as Rx), 1 path also can be called a PCIe resource.In addition, in the embodiment of the present invention, the available passageway of PCIe equipment and standard vias number are not done concrete restriction, but concrete number is followed PCIe standard criterion.PCIe equipment is used standard specification to communicate, and is also that PCIe equipment is used standard vias to communicate.Fig. 1 is for adopting the structural representation of the PCIe system of Optical Fiber Transmission, for convenience, in Fig. 1, local terminal PCIe equipment (the PCIe equipment on Fig. 1 left side) is called to a PCIe equipment, opposite end PCIe equipment (the PCIe equipment on Fig. 1 the right) is called to the 2nd PCIe equipment.
Whether the one PCIe equipment need to detect the 2nd PCIe equipment in place, because being used standard vias, PCIe equipment communicates, therefore when local terminal PCIe equipment Inspection is in place to opposite end PCIe equipment, consult the standard vias number that local terminal PCIe equipment and opposite end PCIe devices communicating are used, determining the standard vias of opposite end PCIe equipment, is also the standard specification of opposite end PCIe equipment.
As shown in Figure 1, the path of a PCIe equipment is connected with an optical module (being called the first optical module), and the path of opposite end PCIe equipment is also connected with an optical module (being called the second optical module), between the first optical module and the second optical module, by optical fiber, is connected.
Fig. 2 be PCIe equipment of the present invention at the flow chart of position detecting method embodiment mono-, the method for the present embodiment is corresponding to the PCIe system shown in Fig. 1.In the present embodiment, the PCIe equipment of describing is to the 2nd PCIe equipment at position detecting method, and the method for the present embodiment can comprise:
Step 201, PCIe equipment Inspection first optical module receive the M road light signal that the second optical module sends; Wherein, described the first optical module and a described PCIe equipment connection, described the second optical module and the 2nd PCIe equipment connection, described the first optical module is connected by optical fiber with described the second optical module.
Wherein, a kind of implementation, described the second optical module sends M road light signal by described the 2nd PCIe device trigger.
Particularly, a kind of performance, is connected with n path (PCIe1Lane0～PCIe1Lane n-1) between a PCIe equipment and the first optical module, and the light signal between the first optical module and the second optical module is for being also n road, and wherein n is greater than 0 integer.
Particularly, step 301 can be by the detection logic realization being integrated in a PCIe equipment, when specific implementation, also can be by the single-chip microcomputer being independent of outside the main circuit of a described PCIe equipment, at this moment this single-chip microcomputer need to and be connected with the first optical module with the main circuit of a described PCIe equipment.
By specifically performing step 301 single-chip microcomputer or the detection logic in a PCIe equipment, be called detection module below.
A kind of execution mode, the first optical module has the function of the number of indicating the light signal that receives the second optical module transmission, for example the first optical module can send an indication information to detection module, detection module is read after this indication information and determine that the first optical module receives M road light signal.
, the first optical module also has light loss detection function and light is lost deixis, and particularly, the light loss detection method of the first optical module for example comprises:
The receiver of the first optical module can be exported a signal of telecommunication, and its current potential just reflects that whether received light signal strength is enough, and the first optical module compares to judge this current potential and preset potential whether light signal is lost.Wherein current potential relatively can adopt the comparator with certain echo effect to realize.
The type of the optical module adopting according to the first optical module, the mode of the light loss indication of the first optical module can be indicated for hardware signal, can be also other bus detection signal indication, for example I2C(Inter-Integrated Circuit) signal designation.For example, if this first optical module to be four channels small-sized can plug (Quad Small Form Factor Pluggable, be called for short: the QSFP) optical module of interface, adopt I2C signal to carry out light and lose indication, correspondingly, detection module adopts I2C signal to go to read the light loss indication that the first optical module sends; If this first optical module be small-sized can plug (Small Form Factor Pluggable, be called for short: the SFP) optical module of interface, adopt hardware signal to carry out light and lose indication, correspondingly, detection module can read the light loss indication that the first optical module sends by hardware signal.
Step 202, a described PCIe equipment, according to the M road light signal receiving, determine that described the 2nd PCIe equipment is in place, and wherein, M is positive integer.
The present embodiment, whether the one PCIe equipment receives by detecting the first optical module light signal judgement the 2nd PCIe equipment situation in place that the second optical module sends, concrete PCIe equipment Inspection first optical module receives the M road light signal that the second optical module sends, determine that described the 2nd PCIe equipment is in place, thereby complete the 2nd PCIe equipment detection in place when having adopted Optical Fiber Transmission PCIe signal, implementation is simple, thereby having solved prior art carries out the detection in place of the 2nd PCIe equipment and needs extra chips, realize complexity, the problem that cost is higher.
Fig. 3 be PCIe equipment of the present invention at the flow chart of position detecting method embodiment bis-, the method for the present embodiment is also corresponding to the PCIe system shown in Fig. 1.At the present embodiment, on basis embodiment illustrated in fig. 2, increased the deterministic process of a PCIe equipment to the available passageway number of the 2nd PCIe equipment and standard vias number, and follow-up communication process.As shown in Figure 3, the method for the present embodiment can comprise:
In base, available passageway refers to the path that PCIe equipment can communicate.
Further particularly, when 2
n≤ M < 2
n+1time, a described PCIe equipment determines that the standard vias number of described the 2nd PCIe equipment is 2
n, wherein, n is integer, and n>=0.Because need to communicate according to standard vias between PCIe equipment, therefore, when the available passageway number of PCIe equipment is not standard vias, need to determine the standard vias number that PCIe can communicate.
The standard vias number of PCIe chip is 1,2,4,8,16,32 at present, and the value of corresponding n is 0,1,2,3,4,5, along with the development of PCIe standard criterion, and technological progress, n also may get larger integer value.For example, when M is 6, a described PCIe equipment determines that according to described 6 road light signals described the 2nd PCIe equipment has 6 tunnel available passageway, is greater than 4 and is less than 8 due to 6, and therefore a PCIe equipment can determine that the available standard vias number of described the 2nd PCIe equipment is 4.
It should be noted that, the standard vias number of a described PCIe equipment is 2
r, wherein r is integer, r>=0, and 2
r>=M, described method also comprises the following steps 406 or step 407.
Step 307, when 2
rwhile being greater than M, by (2 of a described PCIe equipment
r-2
n) road path is for being connected by optical module with another PCIe equipment, and carry out the detection described in the embodiment of the present invention.
Wherein, step 306 and step 307 are two kinds of processing modes arranged side by side, only need to select wherein a kind of when reality is carried out.
R=3 for example, the standard vias number that is a described PCIe equipment is 8, owing to can determining that at a PCIe equipment described in step 404 the available standard vias number of described the 2nd PCIe equipment is 4, the number of vias that a described PCIe equipment need to be used is 4, at this moment, other 4 paths of a described PCIe equipment need to be set to electric idle condition or be set to and be connected by optical module with another PCIe equipment.
The present embodiment, the one PCIe equipment determines that according to described M road light signal described the 2nd PCIe equipment has M road available passageway, and according to described M road available passageway, determine the standard vias number of described the 2nd PCIe equipment, thereby determine that a PCIe equipment itself also needs the standard vias number using, according to described standard vias number and described the 2nd PCIe devices communicating, implementation is simple, thereby having solved prior art carries out the detection in place of the 2nd PCIe equipment and needs extra chips, realize complexity, the problem that cost is higher; Can complete the negotiation of standard vias between a PCIe equipment and the 2nd PCIe equipment, realize a PCIe equipment and the 2nd PCIe devices communicating simultaneously.In addition, by by (2 of a PCIe equipment
r-2
n) road path is set to electric idle condition or setting is connected by optical module with another PCIe equipment, thereby complete the processing that a PCIe equipment is not needed in this communication process to the path of use.
Fig. 4 is the structural representation of PCIe apparatus embodiments one of the present invention, and as shown in Figure 4, the PCIe equipment 400 of the present embodiment can comprise: optical signal detecting module 401, processing module 402, also comprise transceiver module 403, wherein,
Optical signal detecting module 401, receives for detection of the first optical module the M road light signal that the second optical module sends; Wherein, described the first optical module and a PCIe equipment connection, described the second optical module and the 2nd PCIe equipment connection, described the first optical module is connected by optical fiber with described the second optical module;
Wherein, the M road light signal that described the second optical module sends is by described the 2nd PCIe device trigger.
It should be noted that, optical signal detecting module 401 can be for being integrated in the detection logic in a PCIe equipment, when specific implementation, also can be for being independent of the single-chip microcomputer outside the main circuit of a described PCIe equipment, at this moment this single-chip microcomputer need to and be connected with the first optical module with the main circuit of a described PCIe equipment.
The first optical module has the function of the number of indicating the light signal that receives the second optical module transmission, for example the first optical module can send an indication information to optical signal detecting module 401, determines that the first optical module receives M road light signal after making optical signal detecting module 401 read this indication information.
The PCIe equipment of this enforcement can be used as a PCIe equipment embodiment illustrated in fig. 1, and for the technical scheme of embodiment of the method shown in execution graph 2 or 3, it is similar that it realizes principle, repeats no more herein.
The present embodiment, specifically by PCIe equipment Inspection first optical module, receive the M road light signal that the second optical module sends, determine that described the 2nd PCIe equipment is in place, implementation is simple, thereby having solved prior art carries out the detection in place of the 2nd PCIe equipment and needs extra chips, realize complexity, the problem that cost is higher.
Further, described processing module 402 can also be for:
According to described M road light signal, determine that described the 2nd PCIe equipment has M road available passageway;
According to described M road available passageway, determine the standard vias number of described the 2nd PCIe equipment.
Further, described processing module 402 can also be for:
When 2
n≤ M < 2
n+1time, the standard vias number of determining described the 2nd PCIe equipment is 2
n, wherein, n is integer, and n>=0.
Further, described transceiver module 403, can be for after described processing module be determined the standard vias number of described the 2nd PCIe equipment according to described M road available passageway, according to the standard vias number of described the 2nd PCIe equipment and described the 2nd PCIe devices communicating.Thereby complete the negotiation of standard vias between a PCIe equipment and the 2nd PCIe equipment, realize a PCIe equipment and the 2nd PCIe devices communicating.
Further, the standard vias number of a described PCIe equipment is 2
r, wherein r is integer, r>=0, and 2
r>=M, described processing module 402 also for: when 2
rwhile being greater than M, by (2 of a described PCIe equipment
r-2
n) road path is set to electric idle condition; Or, described processing module 402 also for: when 2r is greater than M, by (2 of a described PCIe equipment
r-2
n) road channel setting is connected by optical module with another PCIe equipment, carries out above-mentioned detecting step in place and standard vias negotiation step, thereby complete the processing that a PCIe equipment is not needed in this communication process to the path that uses
Fig. 5 is the structural representation of PCIe equipment in-place detection system embodiment of the present invention, as shown in Figure 5, the system 500 of the present embodiment comprises: a PCIe equipment 501, the first optical module 502 and the 2nd PCIe equipment 503 and the second optical module 504, wherein, the one PCIe equipment 501 can adopt the PCIe equipment shown in Fig. 4, described the 2nd PCIe equipment 503 also can adopt the PCIe equipment shown in Fig. 4, (described the 2nd PCIe equipment 503 also can adopt the PCIe equipment of prior art, one of them adopts the PCIe equipment shown in Fig. 4 the one PCIe equipment 501 of the system of the present embodiment and 503 needs of the 2nd PCIe equipment), a described PCIe equipment 501 is connected with described the first optical module 502, described the 2nd PCIe equipment 503 is connected with described the second optical module 504, described the second optical module 504 is connected with described the first optical module 502 by optical fiber.
Accordingly, the PCIe load detecting system of the present embodiment can execution graph 2 or Fig. 3 shown in the technical scheme of embodiment of the method, it is similar that it realizes principle, repeats no more herein.
The PCIe load detecting system of the present embodiment, the one PCIe equipment judges that by the first optical module receiving optical signals the 2nd PCIe equipment is in place, and implementation is simple, thereby solved prior art, carries out the detection in place of the 2nd PCIe equipment and needs extra chips, realize complexity, the problem that cost is higher; Can complete the negotiation of standard vias between a PCIe equipment and the 2nd PCIe equipment, realize a PCIe equipment and the 2nd PCIe devices communicating simultaneously.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of program command.Aforesaid program can be stored in a computer read/write memory medium.This program, when carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (12)
1. peripheral component interconnect path PCIe equipment, at a position detecting method, is characterized in that, comprising:
The one PCIe equipment Inspection the first optical module receives the M road light signal that the second optical module sends; Wherein, described the first optical module and a described PCIe equipment connection, described the second optical module and the 2nd PCIe equipment connection, described the first optical module is connected by optical fiber with described the second optical module;
A described PCIe equipment, according to the M road light signal receiving, determines that described the 2nd PCIe equipment is in place, and wherein, M is positive integer.
2. method according to claim 1, is characterized in that, also comprises:
A described PCIe equipment determines that according to described M road light signal described the 2nd PCIe equipment has M road available passageway;
A described PCIe equipment is determined the standard vias number of described the 2nd PCIe equipment according to described M road available passageway.
3. method according to claim 2, is characterized in that,
When 2
n≤ M < 2
n+1time, the described standard vias number of determining described the 2nd PCIe equipment according to described M road available passageway, is specially, and the standard vias number of determining described the 2nd PCIe equipment is 2
n, wherein, n is integer, and n>=0.
4. method according to claim 3, is characterized in that, described according to described M road available passageway, determine the standard vias number of described the 2nd PCIe equipment after, also comprise:
A described PCIe equipment is according to the standard vias number of described the 2nd PCIe equipment and described the 2nd PCIe devices communicating.
5. according to the method described in claim 3 or 4, it is characterized in that, the standard vias number of a described PCIe equipment is 2
r, wherein r is integer, r>=0, and 2
r>=M, described method also comprises: when 2
rwhile being greater than M, by (2 of a described PCIe equipment
r-2
n) road path is set to electric idle condition.
6. according to the arbitrary described method of claim 1 to 5, it is characterized in that, described the second optical module sends M road light signal by described the 2nd PCIe device trigger.
7. a peripheral component interconnect path PCIe equipment, is characterized in that, comprising:
Optical signal detecting module, receives for detection of the first optical module the M road light signal that the second optical module sends; Wherein, described the first optical module and a PCIe equipment connection, described the second optical module and the 2nd PCIe equipment connection, described the first optical module is connected by optical fiber with described the second optical module;
Processing module, for according to the M road light signal receiving, determines that described the 2nd PCIe equipment is in place, and wherein, M is positive integer.
8. PCIe equipment according to claim 7, is characterized in that, described processing module also for:
According to described M road light signal, determine that described the 2nd PCIe equipment has M road available passageway;
According to described M road available passageway, determine the standard vias number of described the 2nd PCIe equipment.
9. PCIe equipment according to claim 8, is characterized in that, described processing module specifically for:
When 2
n≤ M < 2
n+1time, the standard vias number of determining described the 2nd PCIe equipment is 2
n, wherein, n is integer, and n>=0.
10. PCIe equipment according to claim 9, is characterized in that, described path also comprises:
Transceiver module, for after described processing module is determined the standard vias number of described the 2nd PCIe equipment according to described M road available passageway, according to the standard vias number of described the 2nd PCIe equipment and described the 2nd PCIe devices communicating.
11. according to the PCIe equipment described in claim 9 or 10, it is characterized in that, the standard vias number of a described PCIe equipment is 2
r, wherein r is integer, r>=0, and 2
r>=M, described processing module also for: when 2
rwhile being greater than M, by (2 of a described PCIe equipment
r-2
n) road path is set to electric idle condition.
12. according to the arbitrary described PCIe equipment of claim 7 to 11, it is characterized in that, described the second optical module sends M road light signal by described the 2nd PCIe device trigger.
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| CN106330300B (en) * | 2015-06-30 | 2018-11-27 | 菲尼萨公司 | Idle state detection circuit, idle state detection method and active optical fiber cable |
| CN108733522A (en) * | 2018-05-22 | 2018-11-02 | 郑州云海信息技术有限公司 | It is a kind of to monitor PCIe card method and system in place in mechanical test |
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