CN101231675B - Method and apparatus for selecting backboard connector signal to connect - Google Patents
Method and apparatus for selecting backboard connector signal to connect Download PDFInfo
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- CN101231675B CN101231675B CN2008101008378A CN200810100837A CN101231675B CN 101231675 B CN101231675 B CN 101231675B CN 2008101008378 A CN2008101008378 A CN 2008101008378A CN 200810100837 A CN200810100837 A CN 200810100837A CN 101231675 B CN101231675 B CN 101231675B
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Abstract
The invention discloses a method which can select backplane connector signal connection modes. The method comprises the following steps that: all feasible backplane connector signal connection modes are searched out according to the design requirements of the backplane, and the wiring conflict number of each backplane connector signal connection mode is searched out; one backplane connector signal connection mode is selected from all the feasible backplane connector signal inter-connection modes according to the wiring conflict number. The invention also discloses a device which can select the backplane connector signal connection modes. The technical proposal of the invention can shorten the design circle of the backplane, and ensure the final design proposal to be the best one, and the design process is independent of the experience of a designer.
Description
Technical field
The present invention relates to the back plate design technical field, refer to a kind of method and apparatus of selecting backboard connector signal to connect especially.
Background technology
Backboard is high-performance printed circuit board (PCB) (PCB, the Printed Circuit Board) plate with back panel connector, and effect is by connector the interface of each veneer cabling with backboard to be coupled together.In the system of a plurality of veneer collaborative works, backboard is the core place of realizing the signal intercommunication between each piece veneer.The veneer that is inserted on the backboard comprises two classes: ply-yarn drill (LC, Line Card) and web plate (FC, Fabric Card), and wherein, ply-yarn drill is meant the PCB veneer that is used to provide business function, web plate is meant the PCB veneer that is used for being used between each ply-yarn drill carry out exchanges data.
Back plate design is meant definite process of the signal annexation between the back panel connector, is key one ring of system design, and the quality of back plate design directly influences the performance of system's operation.As long as the signal annexation on the backboard between each connector determines that then the main signal link on each veneer has also just been determined.At present, the signal that moves on most backboards is high-speed serial signals, and speed reaches the GHz level, and track lengths is had higher requirement.Therefore, how to design the signal annexation on the backboard, making all high speed serialization link cablings the shortest is the emphasis place of back plate design.
At present, the mode that back plate design adopts schematic diagram and PCB to combine more, be specially: the signal that defines earlier back panel connector in schematic diagram connects arranges, guarantee that roughly cabling is more suitable, then schematic diagram is imported and do pre-layout among the PCB, find the place of cabling conflict by pre-layout, adjust the signal definition of schematic diagram then conversely according to the cabling result of pre-layout, so after a lot of repetition, the cabling that guarantees the overwhelming majority is more suitable, still have the cabling of conflict for those, adopt the mode that adds layer or coiling to connect.
Yet in complicated system, because the signal wire on its backboard is more, above-mentioned back panel connector signal connects design and has following shortcoming:
1) finish a PCB pre-layout and need spend the more time, and repeatedly the decline that can cause design efficiency repeatedly between schematic diagram and PCB, the whole design cycle is elongated.
2) whether more suitable the definition of the signal annexation of being done in the schematic diagram stage need take all factors into consideration each layer cabling problem, thereby need the deviser of schematic diagram that more design experiences is arranged, i.e. design itself depends on deviser's experience.
3) the possible signal connected mode on the backboard has multiplely, and the scheme that the deviser finally designs might not be optimum.
Summary of the invention
The invention provides a kind of method of selecting backboard connector signal to connect, this method can shorten the back plate design cycle, guarantee that final design proposal is optimum scheme, and design process does not rely on deviser's experience.
The invention provides a kind of device of selecting backboard connector signal to connect, this device can shorten the back plate design cycle, guarantee that final design proposal is optimum scheme, and design process does not rely on deviser's experience.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The invention discloses a kind of method of selecting backboard connector signal to connect, this method comprises:
Each row connector area on the backboard is divided into ply-yarn drill groove position and web plate groove position, and ply-yarn drill groove position and web plate groove position are one by one at interval: for each the ply-yarn drill groove position on the described backboard, find out all signal arrangement modes that this ply-yarn drill groove position signal is connected with web plate groove position, from all mutually different signal arrangement mode combinations of all ply-yarn drill groove positions, remove infeasible signal arrangement mode combination in the real system, obtain signal feasible in the real system combination of arranging, all mutually different signal arrangement mode combinations of described all ply-yarn drill groove positions are respectively to get a kind of signal arrangement mode to obtain from the signal arrangement mode of all ply-yarn drill groove positions, and the signal arrangement mode combination that all are feasible in real system is as all feasible backboard connector signal to connect; Identify each web plate groove position on the described backboard successively with numeral with size order, two ply-yarn drill groove positions for the described backboard that belongs to same wiring layer, according to these two the ply-yarn drill groove position signal arrangement modes separately under the current backboard connector signal to connect, the magnitude relationship of the Digital ID of the web plate groove position that connected of these two corresponding signals in ply-yarn drill groove position relatively successively, and find out wiring conflict number of times in this wiring layer according to described magnitude relationship, with the summation of the conflict of the wiring in all wiring layers number of times as the number of times that conflicts of the wiring current backboard connector signal to connect under;
From described all feasible backboard connector signal to connect, select a kind of backboard connector signal to connect according to wiring conflict number of times, wherein,
Describedly from all mutually different signal arrangement mode combination of all ply-yarn drill groove positions, remove infeasible signal arrangement mode combination in the real system, obtain signal feasible in the real system combination of arranging and comprise:
A, from the signal arrangement mode of the first ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake;
B1, from the signal arrangement mode of the second ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; B2, the signal arrangement mode of current selection and a kind of signal arrangement mode of having selected of the first ply-yarn drill groove position are compared, judge whether to exist the signal of two ply-yarn drill groove positions to take the situation of identical web plate groove position pin, be then to abandon this signal arrangement mode, return step B1, otherwise, selected this signal arrangement mode;
C1, from the signal arrangement mode of N ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; C2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of N ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step C1, otherwise, selected this signal arrangement mode; N is followed successively by the sequence number of three-way draw-in groove position to penult ply-yarn drill groove position;
D1, from the signal arrangement mode of last ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; D2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of last ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step D1, otherwise, selected this signal arrangement mode;
Each signal arrangement mode that E, record have been selected is signal arrangement mode combination feasible in the real system;
F, all signal arrangement modes all selected mistake whether of judging last ply-yarn drill groove position are then to carry out next step, otherwise return step D1;
G, all signal arrangement modes all selected mistake whether of judging M ply-yarn drill groove position are then to carry out next step, otherwise return step C1; M is followed successively by the sequence number of three-way draw-in groove position, penult ply-yarn drill groove position to the;
H, all signal arrangement modes all selected mistake whether of judging the second ply-yarn drill groove position are then to carry out next step, otherwise return step B1;
I, all signal arrangement modes all selected mistake whether of judging the first groove position are process ends then, otherwise return steps A.
The invention discloses a kind of device of selecting backboard connector signal to connect, be applied to each row connector area and be divided into ply-yarn drill groove position and web plate groove position, and ply-yarn drill groove position and web plate groove position be the selection of the backboard connector signal to connect at interval one by one, this device comprises: spider module, memory module and selection module, wherein
Spider module, be used for requiring to find out all feasible backboard connector signal to connect according to back plate design, and find out wiring conflict number of times under each backboard connector signal to connect, described all feasible backboard connector signal to connect and corresponding wiring conflict number of times are saved in memory module;
Memory module is used to preserve all feasible backboard connector signal to connect that spider module finds out and corresponding wiring conflict number of times;
Select module, the pairing wiring conflict of the backboard connector signal to connect number of times that all that are used for preserving according to memory module are feasible, from described all feasible backboard connector signal to connect, select a kind of backboard connector signal to connect, further, described spider module comprises: search submodule, screening submodule and statistics submodule
Search submodule, be used to find out all signal arrangement modes that the signal of each the ply-yarn drill groove position on the described backboard is connected with web plate groove position, and send to the screening submodule;
The screening submodule is used for removing infeasible signal arrangement mode combination the real system from all mutually different signal arrangement mode combinations, obtains arrange combination and send to the statistics submodule of signal feasible in the real system; All mutually different signal arrangement mode combinations of all ply-yarn drill groove positions are respectively to get a kind of signal arrangement mode to obtain from the signal arrangement mode of all ply-yarn drill groove positions, and the signal arrangement mode combination that all are feasible in real system is as all feasible backboard connector signal to connect;
The statistics submodule, the numeral that is used for having size order identifies each the web plate groove position on the described backboard successively, two ply-yarn drill groove positions for the described backboard that belongs to same wiring layer, according to these two the ply-yarn drill groove position signal arrangement modes separately under the current backboard connector signal to connect, the magnitude relationship of the Digital ID of the web plate groove position that connected of these two corresponding signals in ply-yarn drill groove position relatively successively, and find out wiring conflict number of times in this wiring layer according to described magnitude relationship, with the summation of the wiring in all wiring layers conflict number of times as the number of times that conflicts of the wiring current backboard connector signal to connect under
Wherein, describedly from all mutually different signal arrangement mode combinations, remove infeasible signal arrangement mode combination in the real system, obtain signal feasible in the real system combination of arranging and comprise:
A, from the signal arrangement mode of the first ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake;
B1, from the signal arrangement mode of the second ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; B2, the signal arrangement mode of current selection and a kind of signal arrangement mode of having selected of the first ply-yarn drill groove position are compared, judge whether to exist the signal of two ply-yarn drill groove positions to take the situation of identical web plate groove position pin, be then to abandon this signal arrangement mode, return step B1, otherwise, selected this signal arrangement mode;
C1, from the signal arrangement mode of N ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; C2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of N ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step C 1, otherwise, selected this signal arrangement mode; N is followed successively by the sequence number of three-way draw-in groove position to penult ply-yarn drill groove position;
D1, from the signal arrangement mode of last ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; D2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of last ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step D1, otherwise, selected this signal arrangement mode;
Each signal arrangement mode that E, record have been selected is signal arrangement mode combination feasible in the real system;
F, all signal arrangement modes all selected mistake whether of judging last ply-yarn drill groove position are then to carry out next step, otherwise return step D1;
G, all signal arrangement modes all selected mistake whether of judging M ply-yarn drill groove position are then to carry out next step, otherwise return step C1; M is followed successively by the sequence number of three-way draw-in groove position, penult ply-yarn drill groove position to the;
H, all signal arrangement modes all selected mistake whether of judging the second ply-yarn drill groove position are then to carry out next step, otherwise return step B1;
I, all signal arrangement modes all selected mistake whether of judging the first groove position are process ends then, otherwise return steps A.
As seen from the above technical solution, the present invention is this at first to be required to find out all feasible backboard connector signal to connect according to back plate design, and finds out the wiring conflict number of times under each backboard connector signal to connect; From described all feasible backboard connector signal to connect, select a kind of technical scheme of backboard connector signal to connect then according to wiring conflict number of times, can shorten the back plate design cycle, guarantee that final design proposal is optimum scheme, and design process does not rely on deviser's experience.
Description of drawings
Fig. 1 is a kind of process flow diagram of selecting the method for backboard connector signal to connect of the embodiment of the invention;
Fig. 2 is the principle pictorial diagram that the connector on the embodiment of the invention dorsulum is arranged;
Fig. 3 is the actual graphical synoptic diagram that the connector on the embodiment of the invention dorsulum is arranged;
Fig. 4 is the signal of first wiring layer on the embodiment of the invention dorsulum synoptic diagram of arranging;
Fig. 5 is the signal of second wiring layer on the embodiment of the invention dorsulum synoptic diagram of arranging;
Fig. 6 is the computed in software process flow diagram of the possible connector signal connected mode of institute of the totally interconnected formula backboard of traversal in the embodiment of the invention;
Fig. 7 is the synoptic diagram of a kind of situation of the same a pair of pin that two ply-yarn drill groove position signals take web plate groove position in the embodiment of the invention;
Fig. 8 is the synoptic diagram of a kind of situation of the same a pair of pin that two ply-yarn drill groove position signals do not take web plate groove position in the embodiment of the invention;
Fig. 9 is the annexation synoptic diagram of embodiment of the invention center line draw-in groove position LC0 and LC7 and web plate groove position;
Figure 10 is that embodiment of the invention center line draw-in groove position signal wire is the actual backboard synoptic diagram of non-horizontal wiring;
Figure 11 is a kind of situation synoptic diagram that intersection appears in the cabling of embodiment of the invention center line draw-in groove position signal;
Figure 12 is a kind of structured flowchart of selecting the device of backboard connector signal to connect of the embodiment of the invention.
Embodiment
Fig. 1 is a kind of process flow diagram of selecting the method for backboard connector signal to connect of the embodiment of the invention.As shown in Figure 1, may further comprise the steps:
In this step, can be by the mode of computed in software, according to the requirement of back plate design, possible the mode that all signals of traversal backboard are arranged, and find out wiring in each the signal arrangement mode number of times that conflicts.
In method shown in Figure 1, at first require to find out all feasible backboard connector signal to connect according to back plate design, the best connected mode of a kind of back panel connector signal of selective interconnection conflict least number of times therefrom then, just can finish the process of principle diagram design and PCB layout afterwards once according to the best connected mode of selected a kind of back panel connector signal, thereby compressed the cycle of back plate design, guarantee that final design proposal is optimum, and whole design process does not rely on deviser's experience.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing specific embodiment that develops simultaneously, the present invention is described in more detail.
Back plate design with totally interconnected (Full Mesh) structure in ensuing embodiment is that example describes.Fig. 2 is the principle pictorial diagram that the connector on the embodiment of the invention dorsulum is arranged.As shown in Figure 2, placement is close in seamless each other unoccupied place between each row connector, thereby can only horizontal cabling, as from connector 1-〉connector 5-〉connector 9-〉connector 13 connects up.Fig. 3 is the actual graphical synoptic diagram that the connector on the embodiment of the invention dorsulum is arranged, and as shown in Figure 3, provides the actual graphical synoptic diagram of six connectors, and the connector pin all leaves wiring channel in the horizontal direction, is used for horizontal wiring.
In embodiments of the present invention, the connector signal of each row on the totally interconnected fabric backplanes is divided into ply-yarn drill groove position and web plate groove position, and each interval is placed, and the signal on ply-yarn drill groove position will all have with each web plate groove position and is connected.And in the present embodiment, establish backboard and have 8 ply-yarn drill groove positions and 8 web plate groove positions.In order to make full use of wiring space, the signal wire of two ply-yarn drill grooves of cloth position on a wiring layer, thereby the required number of plies of minimizing cabling.
Fig. 4 is the signal of first wiring layer on the embodiment of the invention dorsulum synoptic diagram of arranging.As shown in Figure 4,8 ply-yarn drill groove positions are respectively LC0～LC7, and 8 web plate groove positions are respectively SFC0～SFC7, and 8 signals are arranged on each groove position, are designated g0～g7 respectively.For each ply-yarn drill groove position, its the 0th signal g0, the problem because connector shown in Figure 2 is arranged, can only horizontal wiring be connected on any the web plate groove position among SFC0～SFC7, and as long as g0 has selected a web plate groove position, then other g1～g7 signal of this ply-yarn drill groove position has not just needed to be connected to the selected web plate groove of g0 position, and the connection situation of other signal by that analogy.It is totally interconnected characteristic decision by the backboard that will design that sort signal is arranged.In Fig. 4, when the S0_g0 signal of LC0 groove position is determined and after SFC1 web plate groove position links to each other, the groove position that the signal of other S0_g1～S0_g7 just only need connection SFC0, SFC2～SFC7.In Fig. 4, the signal of LC0 and these two ply-yarn drill groove positions of LC7 is arranged in first PCB layout layer.First signal S7_g0 for LC7, because the S0_g0 signal has been determined to link to each other with SFC1 groove position, S7g0 just can only just can not produce the wiring conflict when SFC0 ply-yarn drill groove position links to each other, if definition S7_g0 links to each other with other web plate groove position, as linking to each other,, thereby cause the wiring conflict then because the signal routing of S0_g0 has taken existing wiring space with SFC6, in Fig. 4, use the wiring conflict of the box indicating generation of overstriking.Under wire laying mode shown in Figure 4, the signal arrangement mode of the LC0 groove position of first wiring layer and LC7 groove position is always met together and is caused three wiring conflicts, among Fig. 4 all with the box indicating of overstriking.
After the signal of the LC0 groove position of having determined first wiring layer and LC7 groove position was arranged, the signal annexation of its corresponding connector pin just can not rechange.Then, come again on this basis to determine that the LC1 of second wiring layer and the signal of these two ply-yarn drill groove positions of LC6 arrange.
Fig. 5 is the signal of second wiring layer on the embodiment of the invention dorsulum synoptic diagram of arranging.As shown in Figure 5, because the signal of first wiring layer can not rechange, represent the signal of LC0 groove position and LC7 groove position here with italics.The signal of these two ply-yarn drill groove positions of the LC1 of second wiring layer and the LC6 signal of the process and first wiring layer process of arranging of arranging is similar, as, because S0_g0 and S7_g0 have selected SFC1 and SFC6 respectively, so the S1_g0 of LCI just can only select other web plate groove position except that SFC1 and SFC6.A kind of signal arrangement mode of the second last wiring layer is used the wiring conflict in box indicating second wiring layer of overstriking as shown in Figure 5 equally.
Adopt identical method successively, after the signal of having determined second wiring layer is arranged, determine that the LC2 of the 3rd wiring layer and the signal of these two ply-yarn drill groove positions of LC5 arrange; After the signal of the 3rd wiring layer of determining is arranged, determine that the signal of these two ply-yarn drill groove positions of LC3 and LC4 is arranged; And calculate wiring conflict number of times on each wiring layer.The summation of the wiring conflict number of times on last each wiring layer is above-mentioned a kind of wire laying mode, the wiring conflict number of times between promptly above-mentioned a kind of back panel connector signal under the totally interconnected connected mode.
In above-mentioned enforcement, at first, 4 wiring layers on 8 minimum PCB of needs in ply-yarn drill groove position connect up; Secondly, because it is minimum to take into account wiring conflict whole on all wiring layers, all may have the existence of wiring conflict on each wiring layer; At last, according to total wiring conflict number, determine that backboard is except 4 wiring layers of usefulness, also need to increase whole wirings that several wiring layers are covered conflict, in the present embodiment because can only horizontal wiring, if therefore final wiring conflict number of times is less than or equal to 8, then only needs to increase a wiring layer and can solve all wiring collision problems, thereby reach the optimum wiring number of plies and track lengths.
Provided a kind of possible connector signal connected mode of totally interconnected structural formula backboard in the above-described embodiments.Need find out all possible connector signal connected mode of totally interconnected structural formula backboard according to thought of the present invention, and find out the wiring conflict number of times under each connector signal connected mode.The all possible connector signal connected mode of the backboard that specifically can adopt software programming to travel through will to design, and calculate every kind of wiring conflict number of times under the mode, finding out a kind of connector signal connected mode of wiring conflict least number of times.
Next just provide in the embodiment of the invention and to adopt the computed in software mode to travel through the detailed process of the possible connector signal connected mode of institute of totally interconnected formula backboard, and be that example describes still with the backboard layout of 8 ply-yarn drill groove positions and 8 web plate groove positions.
Fig. 6 is the computed in software process flow diagram of the possible connector signal connected mode of institute of the totally interconnected formula backboard of traversal in the embodiment of the invention.As shown in Figure 6, may further comprise the steps:
Step 601～ step 604,7 each ply-yarn drill groove position since the 0th ply-yarn drill groove position to the are followed successively by each ply-yarn drill groove position and have calculated its all possible signal arrangement mode, and store respectively.
In step 601～step 604 of Fig. 6, N represents ply-yarn drill groove position sequence number.
In the present embodiment, owing on each ply-yarn drill groove position 8 signals are arranged, these 8 signals are connected respectively on 8 web plate groove positions, and the selected web plate groove position of one of them signal can not link to each other with other 7 signals again, therefore, 8 signals on ply-yarn drill always have=40320 kinds of arrangement modes, each arrangement mode is corresponding to 8 signals on the ply-yarn drill and a kind of connected mode of 8 web plate groove positions.Therefore, in step 601～step 604, for having calculated its 40320 kinds of signal arrangement modes in each ply-yarn drill groove position, and store respectively.
Step 606.From all signal arrangement modes of ply-yarn drill groove position 1, select a kind of signal arrangement mode of not selected mistake.
Because in real system is used, the situation that signal on two ply-yarn drill groove positions takies the same a pair of pin of the same connector of web plate can not exist, whether the ply-yarn drill groove position signal arrangement mode that therefore needs in this step to have selected more can take the pin of identical connector, be then to need to abandon this wire casing position signal arrangement mode, in the implementation of present embodiment, need to abandon current selecteed a kind of signal arrangement mode of current ply-yarn drill groove position.
In this step,, represent that then the current ply-yarn drill groove position signal arrangement mode of having selected is feasible in real system, therefore carry out next step, to select the signal arrangement mode of next ply-yarn drill groove position if the described number of times that takies the identical connector pin is 0; If be not 0, represent that then the current ply-yarn drill groove position signal arrangement mode of having selected is infeasible in real system, abandon current selecteed a kind of signal arrangement mode of current ply-yarn drill groove position 1, and return step 606, reselect a kind of signal arrangement mode of ply-yarn drill groove position 1, up to find a kind of make that take identical connector pin number of times is 0 arrangement mode till.
Fig. 7 is the synoptic diagram of a kind of situation of the same a pair of pin that two ply-yarn drill groove position signals take web plate groove position in the embodiment of the invention.As shown in Figure 7, for the 0th ply-yarn drill groove position LC0,8 signals on it and the annexation of 8 web plate groove positions are: S0_g0-SFC0, S0_g1-SFC1, S0_g2-SFC2, S0_g3-SFC3, S0_g4-SFC4, S0_g5-SFC5, S0_g6-SFC6, S0_g7-SFC7.The corresponding respectively web plate groove position of 8 signals of noting LC0 this moment is: 0,1,2,3,4,5,6,7.For the 1st ply-yarn drill groove position LC1,8 signals on it and the corresponding relation of 8 web plate groove positions are: S1_g0-SFC0, S1_g1-SFC1, S1_g2-SFC2, S1_g3-SFC3, S1_g4-SFC4, S1_g5-SFC5, S1_g6-SFC6, S1_g7-SFC7.The corresponding respectively web plate groove position of 8 signals of noting LC1 this moment is: 0,1,2,3,4,5,6,7.
In Fig. 7, relatively the Digital ID of the web plate groove position of 8 signal correspondences of 8 signals of LC0 and LC1 is: 0=0,1=1,2=2,3=3,4=4,5=5,6=6,7=7, thereby take identical pin to the end number of times be 8, the situation that exists the connector pin to be repeated to take.So, can not adopt the arrangement mode of 8 signals of LC1 ply-yarn drill groove position shown in Figure 7, need the corresponding relation of change LC1 ply-yarn drill 8 signals in groove position and web plate groove position, promptly need to reselect a kind of signal arrangement mode of LC1.
What provide at Fig. 7 is that the signal of two ply-yarn drill groove positions is overlapping fully, promptly take identical pin number of times and be 8 situation, part signal when two ply-yarn drill groove positions takies identical pin, and another part signal situation that takies identical pin useless still belongs to disabled situation in the real system.Therefore, whether step 608 is 0 to judge according to the number of times that takies identical pin.
Fig. 8 is the synoptic diagram of a kind of situation of the same a pair of pin that two ply-yarn drill groove position signals do not take web plate groove position in the embodiment of the invention.As shown in Figure 8, for LC0, the web plate groove position that its 8 signals are corresponding respectively still is: 0,1,2,3,4,5,6,7.For the 1st ply-yarn drill groove position LC1,8 signals on it and the corresponding relation of 8 web plate groove positions are: S1_g0-SFC1, S1_g1-SFC2, S1_g2-SFC3, S1_g3-SFC4, S1_g4-SFC5, S1_g5-SFC6, S1_g6-SFC7, S1_g7-SFC0.The corresponding respectively web plate groove position of 8 signals of noting LC1 this moment is: 1,2,3,4,5,6,7,0.
In Fig. 8, relatively the Digital ID of the web plate groove position of 8 signal correspondences of 8 signals of LC0 and LC 1 is: 0!=1,1!=2,2!=3,3!=4,4!=5,5!=6,6!=7,7!=0, thus take identical pin to the end number of times be 0, the situation that no longer exists the connector pin to be repeated to take.So, can adopt the arrangement mode of 8 signals of LC1 ply-yarn drill groove position shown in Figure 8.
By Fig. 7 and example shown in Figure 8 as can be seen, when adopting software programming, can be by with relatively judging whether the situation that the connector pin is repeated to take between the Digital ID, wherein, there is arbitrary logarithm sign sensible etc., then shows the situation that exists the connector pin to be re-used.
After by step 606～step 608 one circulates in a kind of signal arrangement mode of having determined ply-yarn drill groove position 1, carry out next circulation, promptly step 609～step 611 is arranged with a kind of appropriate signal of determining ply-yarn drill groove position 2.
Step 612～step 623, similar with the circulation of step 606～step 608 and step 609～step 611, from ply-yarn drill groove position 3,4,5 and 6, select a kind of signal arrangement mode successively, no longer describe in detail here.
Till this step, selected one group of available signal arrangement mode, analyze as described above, walk the signal of two ply-yarn drill groove positions on wiring layer, and the signal that the signal of LC0 and the LC7 signal of walking first wiring layer, LC1 and the LC6 signal of walking second wiring layer, LC2 and LC5 is walked the 3rd wiring layer, LC3 and LC4 is walked the 4th wiring layer.In the present embodiment, judging its wiring conflict by the numeral of the pairing web plate groove of ply-yarn drill groove position signal position equally, is that example describes with Fig. 9.
Fig. 9 is the annexation synoptic diagram of embodiment of the invention center line draw-in groove position LC0 and LC7 and web plate groove position.As shown in Figure 9,8 signals of ply-yarn drill groove position LC0 and the corresponding relation between the web plate groove position are: S0_g0-SFC0, S0_g1-SFC1, S0_g2-SFC2, S0_g3-SFC3, S0_g4-SFC4, S0_g5-SFC5, S0_g6-SFC6, S0_g7-SFC7.8 signals noting LC0 this moment Digital ID of corresponding web plate groove position respectively are: 0,1,2,3,4,5,6,7.8 signals of ply-yarn drill groove position LC7 and the corresponding relation between the web plate groove position are: S7_g0-SFC7, S7_g1-SFC0, S7_g2-SFC1, S7_g3-SFC2, S7_g4-SFC3, S7_g5-SFC4, S7_g6-SFC5, S7_g7-SFC6.8 signals noting LC0 this moment Digital ID of corresponding web plate groove position respectively are: 7,0,1,2,3,4,5,6.The Digital ID of the pairing web plate groove of the signal on LC0 and LC7 position compared obtains:
0＜7、1＞0、2＞1、3＞2、4＞3、5＞4、6＞5、7＞6；
From Fig. 9, can see intuitively again, these two wiring lines passages of S0_g0 and S7_g0 overlap each other and produce conflict, and 0＜7 wiring conflict that has shown between the 0th signal of LC0 and LC7 in the above-mentioned comparison result, i.e. wiring conflict between S0_g0 and the S7_g0.Other left side numerical value all shows not wiring conflict greater than the result of the right numerical value.Therefore, whether overlapping size between the corresponding wiring channel Digital ID that can be converted into corresponding web plate groove position relatively.Equally,, adopt identical method to calculate the wiring conflict number of times that each wiring layer exists, gather then, obtain total wiring conflict number of times of four wiring layers for three wiring layers at LC1 and LC6, LC2 and LC5, LC3 and LC4 place.
Step 629～step 632, whether all signal arrangement modes of judging ply-yarn drill groove position 6,5,4,3 successively all selected mistake.
In above-mentioned flow process shown in Figure 6, by traveling through all signal arrangement modes of all ply-yarn drill groove positions, finally obtained a kind of ply-yarn drill groove position signal arrangement mode combination of wiring conflict least number of times, according to this signal arrangement mode composite design backboard schematic diagram, then designed schematic diagram is imported the PCB tool software and carry out placement-and-routing, just can obtain the PCB design document of the backboard of totally interconnected structure.
In the embodiment shown in fig. 6, because 8 signal pins of each ply-yarn drill groove position can only go out 8 lines between connector, therefore, if 4 total wiring conflict number of times of wiring layer are less than or equal to 8, then only need to increase a wiring layer and just can finish the signal wire that all cause the wiring conflict by cloth, thereby make required wiring number of plies minimum, the cabling optimum of arranging.
In above embodiment, on the backboard between the connector of vertical direction compactness arrange, the connector that causes each row is seamless each other and can't cabling, therefore can only horizontal wiring.The back plate design that cabling space is arranged between the connector for homeotropic alignment, minimum wiring consequences of hostilities in the time of can adopting computed in software to obtain all signal wire horizontal wirings equally, each ply-yarn drill groove position that can at first guarantee horizontal wiring like this is to web plate groove position cabling optimum; Then,, can connect up by the space of the vertical direction between connector for the wiring conflict of level, thus the wiring conflict of offsetting some; What on this basis, judge whether again to need to increase wiring layer and need to increase wiring layer.Like this, for the back plate design that can connect up on the connector vertical direction, the back plate design method that provides in the above embodiment of the present invention can be provided equally, thereby significantly reduce of the dependence of backboard signal definition for deviser's experience, shorten the design cycle, and guarantee that the backboard wiring layer is minimum, all cabling is the shortest, optimum.
In addition, the back plate design method that is provided for the back plate design of non-horizontal wiring can adopt in the above embodiment of the present invention equally for ply-yarn drill groove position signal wire below simply describes.
Figure 10 is that embodiment of the invention center line draw-in groove position signal wire is the actual backboard synoptic diagram of non-horizontal wiring.As shown in figure 10,, but connect up, therefore can have cabling situation intersected with each other with respect to angle of horizontal direction inclination because ply-yarn drill groove position signal wire does not carry out horizontal wiring.In this case, cabling appearance intersection being wiring appearance conflict.But as can be seen from Figure 10, it still is overlapping the taking of wiring channel and the wiring conflict that causes that cabling described here intersects its essence.
For as shown in figure 10 ply-yarn drill groove position signal and the line between the signal of web plate groove position is with respect to the tilt scene of wiring of horizontal direction, be in signal with each ply-yarn drill groove position of delegation be connected to be in the situation on each web plate groove position signal of delegation under, can carry out back plate design with the described mode of Fig. 6 equally, as follows:
At first, find out a kind of possible signal arrangement mode combination of each ply-yarn drill groove position equally, and the situation that guarantees not exist the pin of connector to be repeated to take, detailed process is with the description in embodiment illustrated in fig. 6.
Secondly, judge cabling intersection number of times by the Digital ID of the pairing web plate groove of ply-yarn drill groove position signal position, i.e. wiring conflict number of times is specifically referring to the given example of Figure 11.
Figure 11 is a kind of situation synoptic diagram that intersection appears in the cabling of embodiment of the invention center line draw-in groove position signal.As shown in figure 11, four groups of signals of ply-yarn drill groove position LC0 are connected to respectively on the corresponding web plate groove position sideling, its corresponding relation is: S0_g0-SFC1, S0_g1-SFC2, S0_g2-SFC3, S0_g3-SFC0, so the Digital ID of its corresponding web plate groove position is: 1,2,3,0.Four groups of signals of ply-yarn drill groove position LC4 are connected to respectively on the corresponding web plate groove position sideling, and its corresponding relation is: S4_g0-SFC0, S4_g1-SFC1, S4_g2-SFC2, S4_g3-SFC3, its corresponding web plate number of slots word is designated: 0,1,2,3.As seen, the signal that is in delegation of LC0 and LC4 has been connected on each the web plate groove position signal that is in delegation.Relatively the Digital ID of the corresponding web plate groove of this ply-yarn drill groove position LC0 and LC4 position is: 1＞0,2＞1,3＞2,0＜3; Can see intuitively from Figure 11 that again the cabling of signal S4g3 and S0_g3 is complete intersection each other, can't be at these two pairs of signals of same wiring layer cloth, the conflict that exists a wiring to intersect.Therefore, can draw in web plate number of slots sign and know in the comparison result, left side numerical value represents promptly that less than 0＜3 of the right numerical value a wiring intersects, i.e. wiring conflict.This and embodiment illustrated in fig. 6 in determination methods identical.
At last, add up the wiring intersection conflict number of times of all wiring layers.
Repeat above-mentioned three steps, travel through all possible signal arrangement mode combination of each ply-yarn drill groove position, therefrom find out a kind of signal arrangement mode combination of wiring conflict least number of times.
Can see from top analysis, even for the backboard cabling can not horizontal wiring situation, if its signal that is in each ply-yarn drill groove position of delegation is connected on each the web plate groove position signal that is in delegation, then also can adopt the method statistic wiring conflict number of times that provides computed in software in the present embodiment, thereby find optimum the signal arrangement mode and the cabling number of plies.
In addition, need to prove also that for ply-yarn drill groove position and web plate number of slots amount situation inequality, because a web plate groove position only need connect a pair of differential lines to a ply-yarn drill groove position, thereby the signal number that needs on the ply-yarn drill to participate in calculating is determined by web plate quantity.As shown in figure 11, backboard has 5 ply-yarn drill groove positions and 4 web plate groove positions, so only needs to connect 4 signal branches on each ply-yarn drill groove position and be clipped on 4 web plates and get final product.Thereby the computed in software method in the above embodiment of the present invention is not subjected to ply-yarn drill groove position and the different restriction of web plate number of slots order.
Based on the foregoing description, next provide a kind of structured flowchart of selecting the device of backboard connector signal to connect.
Figure 12 is a kind of structured flowchart of selecting the device of backboard connector signal to connect of the embodiment of the invention.As shown in figure 12, this back plate design device comprises: spider module 1201, memory module 1202 and selection module 1203, wherein:
In the present embodiment, spider module 1201 can be selected all feasible backboard connector signal to connect according to the mode in embodiment illustrated in fig. 6, and find out wiring conflict number of times under each feasible backboard connector signal to connect, no longer repeat here.
In Figure 12, spider module 1201 also comprises: search submodule 1205, screening submodule 1206 and statistics submodule 1207, wherein:
In Figure 12, select module 1203, be used for from a kind of backboard connector signal to connect of memory module 1202 selective interconnections conflict least number of times.
In sum, in the embodiment of the invention, at first requirement finds out all feasible backboard connector signal to connect according to back plate design, and finds out the wiring conflict number of times under each backboard connector signal to connect; From described all feasible backboard connector signal to connect, select a kind of back plate design technical scheme of backboard connector signal to connect then according to wiring conflict number of times, can shorten the back plate design cycle, guarantee that final design proposal is optimum scheme, and design process does not rely on deviser's experience.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a method of selecting backboard connector signal to connect is characterized in that, this method comprises:
Each row connector area on the backboard is divided into ply-yarn drill groove position and web plate groove position, and ply-yarn drill groove position and web plate groove position are one by one at interval: for each the ply-yarn drill groove position on the described backboard, find out all signal arrangement modes that this ply-yarn drill groove position signal is connected with web plate groove position, from all mutually different signal arrangement mode combinations of all ply-yarn drill groove positions, remove infeasible signal arrangement mode combination in the real system, obtain signal feasible in the real system combination of arranging, all mutually different signal arrangement mode combinations of described all ply-yarn drill groove positions are respectively to get a kind of signal arrangement mode to obtain from the signal arrangement mode of all ply-yarn drill groove positions, and the signal arrangement mode combination that all are feasible in real system is as all feasible backboard connector signal to connect; Identify each web plate groove position on the described backboard successively with numeral with size order, two ply-yarn drill groove positions for the described backboard that belongs to same wiring layer, according to these two the ply-yarn drill groove position signal arrangement modes separately under the current backboard connector signal to connect, the magnitude relationship of the Digital ID of the web plate groove position that connected of these two corresponding signals in ply-yarn drill groove position relatively successively, and find out wiring conflict number of times in this wiring layer according to described magnitude relationship, with the summation of the conflict of the wiring in all wiring layers number of times as the number of times that conflicts of the wiring current backboard connector signal to connect under;
From described all feasible backboard connector signal to connect, select a kind of backboard connector signal to connect according to wiring conflict number of times, wherein,
Describedly from all mutually different signal arrangement mode combination of all ply-yarn drill groove positions, remove infeasible signal arrangement mode combination in the real system, obtain signal feasible in the real system combination of arranging and comprise:
A, from the signal arrangement mode of the first ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake;
B1, from the signal arrangement mode of the second ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; B2, the signal arrangement mode of current selection and a kind of signal arrangement mode of having selected of the first ply-yarn drill groove position are compared, judge whether to exist the signal of two ply-yarn drill groove positions to take the situation of identical web plate groove position pin, be then to abandon this signal arrangement mode, return step B 1, otherwise, selected this signal arrangement mode;
C1, from the signal arrangement mode of N ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; C2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of N ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step C1, otherwise, selected this signal arrangement mode; N is followed successively by the sequence number of three-way draw-in groove position to penult ply-yarn drill groove position;
D1, from the signal arrangement mode of last ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; D2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of last ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step D1, otherwise, selected this signal arrangement mode;
Each signal arrangement mode that E, record have been selected is signal arrangement mode combination feasible in the real system;
F, all signal arrangement modes all selected mistake whether of judging last ply-yarn drill groove position are then to carry out next step, otherwise return step D1;
G, all signal arrangement modes all selected mistake whether of judging M ply-yarn drill groove position are then to carry out next step, otherwise return step C1; M is followed successively by the sequence number of three-way draw-in groove position, penult ply-yarn drill groove position to the;
H, all signal arrangement modes all selected mistake whether of judging the second ply-yarn drill groove position are then to carry out next step, otherwise return step B1;
I, all signal arrangement modes all selected mistake whether of judging the first groove position are process ends then, otherwise return steps A.
2. the method for claim 1, it is characterized in that the described number of times that conflicts according to connecting up selects a kind of backboard connector signal to connect to be: a kind of backboard connector signal to connect of selective interconnection conflict least number of times from all feasible backboard connector signal to connect from all feasible backboard connector signal to connect.
3. the method for claim 1 is characterized in that,
Line between described ply-yarn drill groove position signal and the web plate groove position signal is a horizontal wiring.
4. the method for claim 1 is characterized in that,
Line between described ply-yarn drill groove position signal and the web plate groove position signal to be with respect to the horizontal direction wiring of tilting, and the signal that is in each ply-yarn drill groove position of delegation is connected on each the web plate groove position signal that is in delegation.
5. device of selecting backboard connector signal to connect, it is characterized in that, be applied to each row connector area and be divided into ply-yarn drill groove position and web plate groove position, and ply-yarn drill groove position and web plate groove position be the selection of the backboard connector signal to connect at interval one by one, this device comprises: spider module, memory module and selection module, wherein
Spider module is used for requiring to find out all feasible backboard connector signal to connect according to back plate design, and finds out the wiring conflict number of times under each backboard connector signal to connect;
Memory module is used to preserve all feasible backboard connector signal to connect that spider module finds out and corresponding wiring conflict number of times;
Select module, the pairing wiring conflict of the backboard connector signal to connect number of times that all that are used for preserving according to memory module are feasible, from described all feasible backboard connector signal to connect, select a kind of backboard connector signal to connect, further, described spider module comprises: search submodule, screening submodule and statistics submodule
Search submodule, be used to find out all signal arrangement modes that the signal of each the ply-yarn drill groove position on the described backboard is connected with web plate groove position, and send to the screening submodule;
The screening submodule is used for removing infeasible signal arrangement mode combination the real system from all mutually different signal arrangement mode combinations, obtains arrange combination and send to the statistics submodule of signal feasible in the real system; All mutually different signal arrangement mode combinations of all ply-yarn drill groove positions are respectively to get a kind of signal arrangement mode to obtain from the signal arrangement mode of all ply-yarn drill groove positions, and the signal arrangement mode combination that all are feasible in real system is as all feasible backboard connector signal to connect;
The statistics submodule, the numeral that is used for having size order identifies each the web plate groove position on the described backboard successively, two ply-yarn drill groove positions for the described backboard that belongs to same wiring layer, according to these two the ply-yarn drill groove position signal arrangement modes separately under the current backboard connector signal to connect, the magnitude relationship of the Digital ID of the web plate groove position that connected of these two corresponding signals in ply-yarn drill groove position relatively successively, and find out wiring conflict number of times in this wiring layer according to described magnitude relationship, with the summation of the wiring in all wiring layers conflict number of times as the number of times that conflicts of the wiring current backboard connector signal to connect under
Wherein, describedly from all mutually different signal arrangement mode combinations, remove infeasible signal arrangement mode combination in the real system, obtain signal feasible in the real system combination of arranging and comprise:
A, from the signal arrangement mode of the first ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake;
B1, from the signal arrangement mode of the second ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; B2, the signal arrangement mode of current selection and a kind of signal arrangement mode of having selected of the first ply-yarn drill groove position are compared, judge whether to exist the signal of two ply-yarn drill groove positions to take the situation of identical web plate groove position pin, be then to abandon this signal arrangement mode, return step B1, otherwise, selected this signal arrangement mode;
C1, from the signal arrangement mode of N ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; C2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of N ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step C1, otherwise, selected this signal arrangement mode; N is followed successively by the sequence number of three-way draw-in groove position to penult ply-yarn drill groove position;
D1, from the signal arrangement mode of last ply-yarn drill groove position, select not a kind of signal arrangement mode of selected mistake; D2, identify each web plate groove position on the backboard successively with the numeral with size order; The Digital ID of the web plate groove position that signal connected of last ply-yarn drill groove position is compared with the Digital ID of the web plate groove position that signal was connected of all other ply-yarn drill groove positions successively, if there is the Digital ID of the web plate groove position that at least one pair of signal connects identical, then abandon this signal arrangement mode, return step D1, otherwise, selected this signal arrangement mode;
Each signal arrangement mode that E, record have been selected is signal arrangement mode combination feasible in the real system;
F, all signal arrangement modes all selected mistake whether of judging last ply-yarn drill groove position are then to carry out next step, otherwise return step D1;
G, all signal arrangement modes all selected mistake whether of judging M ply-yarn drill groove position are then to carry out next step, otherwise return step C1; M is followed successively by the sequence number of three-way draw-in groove position, penult ply-yarn drill groove position to the;
H, all signal arrangement modes all selected mistake whether of judging the second ply-yarn drill groove position are then to carry out next step, otherwise return step B1;
I, all signal arrangement modes all selected mistake whether of judging the first groove position are process ends then, otherwise return steps A.
6. device as claimed in claim 5 is characterized in that, described selection module is used for from a kind of backboard connector signal to connect of memory module selective interconnection conflict least number of times.
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