CN112446188B - Method, device, equipment and storage medium for checking intermediate distances of different differential lines - Google Patents
Method, device, equipment and storage medium for checking intermediate distances of different differential lines Download PDFInfo
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- CN112446188B CN112446188B CN202011227811.7A CN202011227811A CN112446188B CN 112446188 B CN112446188 B CN 112446188B CN 202011227811 A CN202011227811 A CN 202011227811A CN 112446188 B CN112446188 B CN 112446188B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000013461 design Methods 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 11
- 238000004590 computer program Methods 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 5
- 238000009960 carding Methods 0.000 claims description 3
- 238000009432 framing Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 239000011295 pitch Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 101100421134 Schizosaccharomyces pombe (strain 972 / ATCC 24843) sle1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/39—Circuit design at the physical level
- G06F30/394—Routing
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Abstract
The invention discloses a method, a device, equipment and a storage medium for checking the intermediate distances of different differential lines, wherein the method comprises the following steps: screening out a differential wire in the PCB through a wire section mode in Cadence software; different differential lines are subjected to frame selection and are divided into a plurality of groups, and adjacent differential lines are grouped together; utilizing axlAirGap in Cadence software to carry out spacing comparison, finding out line segments which do not meet the design requirement according to parameters in the PCB, and lightening; the device comprises a screening unit, a grouping unit and a spacing comparison unit; by the mode, different differential line intervals can be automatically checked, the defects of errors and omission in manual observation and measurement of the differential line intervals are overcome, the automatic calculation and checking of the different differential line intervals are realized through differential line grouping, a large number of checks of the different differential line intervals can be rapidly and accurately completed, and the design efficiency of the PCB is greatly improved.
Description
Technical Field
The invention relates to the field of software systems, in particular to a method, a device, equipment and a storage medium for checking intermediate distances of different differential lines.
Background
At present, a plurality of PCB design software exist in the market, Cadence is the most widely applied software in the industry, not only is the Cadence provided with strong functions and a plurality of related software to support, but also because the Cadence provides an open secondary development interface and a more perfect development language library, users can carry out secondary development according to self needs. The sketch language is a high-level programming language which is built in Cadence software and is based on a C language and an LISP language, the Cadence provides rich interactive functions for the sketch language, and the work efficiency can be greatly improved by researching the sketch language and then writing tools.
The distance between different differential signal lines in the PCB design needs to be kept at a certain minimum distance, and in the PCB design process, due to the fact that the number of the routing lines is large, a designer often ignores the distance between the differential lines, and later-period manual measurement is time-consuming and labor-consuming.
Disclosure of Invention
The invention mainly solves the technical problem of providing a method, a device, equipment and a storage medium for checking the intermediate distances of different differential lines, which can quickly and accurately group the differential signal lines and quickly detect the distances among different differential lines in the same PCB so as to accurately finish the checking of different differential lines.
In order to solve the technical problems, the invention adopts a technical scheme that: the method for checking the intermediate distances of different differential lines comprises the following steps:
screening out differential lines in the PCB;
the differential lines are subjected to frame selection and are divided into a plurality of groups, diagonal points on each group of frame selection are connected, intersection points of the connection diagonal points and the differential lines in the frame selection are calculated respectively, coordinates of the intersection points are obtained, and the intersection points are placed in a first array; grouping according to the adjacent relation of different differential lines;
and comparing the distances of the grouped differential lines, finding out line segments which do not meet the design requirements according to parameters in the PCB, and lightening.
Furthermore, each intersection point coordinate in the first array corresponds to a unique identification numerical value.
Further, the grouping according to the adjacent relation of different differential lines includes:
sorting the unique identification numerical values corresponding to the intersection point coordinates in the first sequence from small to large, and sequentially from a first unique identification numerical value, a second unique identification numerical value to a plurality of unique identification numerical values;
traversing and carding the first number sequence, and placing all the unique identification values in the first number sequence in a second number sequence, wherein the unique identification values in the second number sequence correspond to the adjacent relations of different differential lines;
removing unpaired differential lines;
and grouping the adjacent differential lines.
Further, the removing the unpaired differential line includes: after the framing is divided into a plurality of groups, if two signal lines in one differential line are framed and divided into different groups, the differential lines of which the two signal lines are framed and divided into different groups are removed.
Further, grouping the adjacent differential lines includes, starting from the second unique identification value, grouping the second unique identification value and the third unique identification value into a group until the grouping of the first unique identification values is completed.
Further, the comparing the distances between the grouped differential lines includes: setting signal lines in two adjacent differential lines as a first signal line, a second signal line, a third signal line and a fourth signal line; the second signal line is adjacent to a third signal line, the minimum value of the distance between the second signal line and the third signal line is found, the third signal line is divided into a plurality of parts, the distances between the parts and the corresponding parts of the second signal line are calculated, and the calculated distance is compared with the minimum value.
A differential line pitch inspection apparatus, comprising: the device comprises a screening unit, a grouping unit and a spacing comparison unit;
the screening unit screens out differential lines in the PCB;
the grouping unit divides the differential lines into a plurality of groups and groups adjacent differential lines together;
the distance comparison unit is used for comparing the distances between adjacent differential lines, finding out line segments which do not meet the design requirements according to set parameters, and lightening the line segments.
A differential line neutral distance inspection apparatus comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method for checking the inter-wire distances of different differential lines when executing the computer program.
A storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of checking differential line pitches as described in any one of the above methods.
The invention has the beneficial effects that: the invention provides a method, a device, equipment and a storage medium for checking the intermediate distances of different differential lines, which can automatically check the distances of different differential lines, make up for the defects of errors and omissions in manual observation and measurement of the distances of the differential lines, realize automatic calculation and check of the distances of the differential lines through differential line grouping, can quickly and accurately finish the check of a large number of different distances of the differential lines, and greatly improve the design efficiency of a PCB.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of a method for checking the inter-line distances of different differential lines according to the present invention;
FIG. 2 is a schematic diagram of a box selection in a method for checking the intermediate distances between different differential wires according to the present invention;
FIG. 3 is a schematic diagram of testing the pitch of different differential lines in a method for checking the pitch between different differential lines according to the present invention;
fig. 4 is a schematic diagram of an inspection apparatus for pitch between different differential lines according to the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the present invention more comprehensible to those skilled in the art, and will thus provide a clear and concise definition of the scope of the present invention.
Referring to fig. 1 to 4, an embodiment of the present invention includes:
a method for checking the intermediate distances of different differential lines comprises the following steps:
screening out a differential line in the PCB through a line segment mode in Cadence software;
different differential lines are subjected to frame selection and divided into a plurality of groups, and adjacent differential lines are grouped together;
connecting the OO' points on each group of frame, respectively calculating the intersection points with the obtained differential lines, and obtaining the X coordinates of the intersection points, and putting the intersection points in a list listB ((X1 DBID) (X2 DBID) (X3DBID) … …);
wherein, DBID means a unique identifier, which means that coordinates such as X1, X2 … …, etc. have uniqueness within the selected group.
Sorting the listB from small to large by using a sortcar function in Cadence software to obtain the listB as list ((X1 DBID1) (X2 DBID2) (X3DBID 3) … …);
DBID1 is the value inside X1, and so on.
Traversing and carding listB, acquiring all DBIDs, and putting the DBIDs in a series listC, wherein the listC is list (DBID1DBID2 DBID3 … … DBIDN), and the series listC is the adjacent relation of all acquired differential lines;
removing unpaired differential lines, wherein two signal lines usually exist in one differential line; after the foregoing framing is performed into a plurality of groups, there is a case where two signal lines in one differential line are framed into different groups, and the differential line in this case is removed.
The intersection point is obtained by using a differential line and comprises two signal lines, and the intersection points of the two signal lines and OO', the problem of the distance between different differential lines is solved, DBID1 is removed, and the even number and the next odd number of data in a listC array C after DBID2 are used as a group for judgment; for example (DBID2, DBID3), (DBID4, DBID 5); thus, two different differential lines are divided into one group;
utilizing axlAirGap in Cadence software to carry out spacing comparison; take (DBID2, DBID3) as an example
Referring to fig. 3, finding out DBIDs of all boxes selected in the first differential line and the second differential line selected in the boxes; the first differential line is divided into line1 and line 2; the second differential line is divided into line3 and line 4; (DBID2, DBID3) refers to line2 and line 3; finding the minimum value of the line2 from the line3, dividing the line3 into a plurality of parts, namely seg1 and seg2 … …, calculating the distances between the plurality of parts and the corresponding part of the line2, comparing the calculated distances with the minimum value, finding out line segments which do not meet the design requirements according to parameters set by the PCB, and lightening the line segments.
The line sections which do not meet the design requirements have different parameters according to different PCB boards, and can be manually set through an input box in software.
The embodiment of the invention also provides a device for checking the spacing among different differential lines, which comprises: the device comprises a screening unit, a grouping unit and a spacing comparison unit;
the screening unit screens out differential lines in the PCB;
the grouping unit divides the differential lines into a plurality of groups and groups adjacent differential lines together;
the distance comparison unit is used for comparing the distances between adjacent differential lines, finding out line segments which do not meet the design requirements according to set parameters, and lightening the line segments.
The invention provides a device for checking the intermediate distances of different differential lines, which comprises:
a memory for storing a computer program;
a processor for implementing the steps of the different differential line intermediate distance checking method as described above when executing the computer program.
The storage medium provided by the embodiment of the present invention stores a computer program, and the computer program, when executed by a processor, implements the steps of the method for checking distances between different differential lines.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method for checking the intermediate distances between different differential lines is characterized by comprising the following steps:
screening out differential lines in the PCB;
the differential lines are subjected to frame selection and are divided into a plurality of groups, diagonal points on each group of frame selection are connected, intersection points of the connection diagonal points and the differential lines in the frame selection are calculated respectively, coordinates of the intersection points are obtained, and the intersection points are placed in a first array;
grouping according to the adjacent relation of different differential lines:
sorting the unique identification numerical values corresponding to the intersection point coordinates in the first sequence from small to large, and sequentially from a first unique identification numerical value, a second unique identification numerical value to a plurality of unique identification numerical values;
traversing and carding the first number sequence, and placing all the unique identification values in the first number sequence in a second number sequence, wherein the unique identification values in the second number sequence correspond to the adjacent relations of different differential lines;
removing unpaired differential lines;
grouping adjacent differential lines;
and comparing the distances of the grouped differential lines, finding out line segments which do not meet the design requirements according to parameters in the PCB, and lightening.
2. The method according to claim 1, wherein the differential line pitch checking comprises:
and each intersection point coordinate in the first sequence corresponds to a unique identification numerical value.
3. The method according to claim 1, wherein the differential line pitch checking comprises: the removing of the unpaired differential line comprises: after the framing is divided into a plurality of groups, if two signal lines in one differential line are framed and divided into different groups, the differential lines of which the two signal lines are framed and divided into different groups are removed.
4. The method according to claim 1, wherein the differential line pitch checking comprises: grouping adjacent differential lines comprises, starting from the second unique identification value, grouping the second unique identification value and the third unique identification value into a group until a plurality of unique identification values are grouped.
5. The method according to claim 1, wherein the differential line pitch checking comprises: the step of comparing the distances of the grouped differential lines comprises: setting signal lines in two adjacent differential lines as a first signal line, a second signal line, a third signal line and a fourth signal line; the second signal line is adjacent to a third signal line, the minimum value of the distance between the second signal line and the third signal line is found, the third signal line is divided into a plurality of parts, the distances between the parts and the corresponding parts of the second signal line are calculated, and the calculated distance is compared with the minimum value.
6. An apparatus for inspecting a pitch between different differential lines, which employs the method for inspecting a pitch between different differential lines according to claim 1, comprising: the device comprises a screening unit, a grouping unit and a spacing comparison unit;
the screening unit screens out differential lines in the PCB;
the grouping unit divides the differential lines into a plurality of groups and groups adjacent differential lines together;
the distance comparison unit is used for comparing the distances between adjacent differential lines, finding out line segments which do not meet the design requirements according to set parameters, and lightening the line segments.
7. An apparatus for inspecting the pitch between different differential lines, comprising:
a memory for storing a computer program;
a processor for implementing the steps of a method of differential line neutral distance inspection as claimed in any one of claims 1 to 5 when executing said computer program.
8. A storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of differential line pitch inspection according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011227811.7A CN112446188B (en) | 2020-11-06 | 2020-11-06 | Method, device, equipment and storage medium for checking intermediate distances of different differential lines |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011227811.7A CN112446188B (en) | 2020-11-06 | 2020-11-06 | Method, device, equipment and storage medium for checking intermediate distances of different differential lines |
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| CN112446188A CN112446188A (en) | 2021-03-05 |
| CN112446188B true CN112446188B (en) | 2022-07-12 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103914579A (en) * | 2013-01-08 | 2014-07-09 | 鸿富锦精密工业（深圳）有限公司 | Signal line checking system and method |
| CN110362884A (en) * | 2019-06-26 | 2019-10-22 | 苏州浪潮智能科技有限公司 | The method and device that differential lines via hole threading checks in a kind of PCB design |
| CN110378062A (en) * | 2019-07-26 | 2019-10-25 | 苏州浪潮智能科技有限公司 | A kind of the pin wiring inspection method and relevant apparatus of differential lines |
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2020
- 2020-11-06 CN CN202011227811.7A patent/CN112446188B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103914579A (en) * | 2013-01-08 | 2014-07-09 | 鸿富锦精密工业（深圳）有限公司 | Signal line checking system and method |
| CN110362884A (en) * | 2019-06-26 | 2019-10-22 | 苏州浪潮智能科技有限公司 | The method and device that differential lines via hole threading checks in a kind of PCB design |
| CN110378062A (en) * | 2019-07-26 | 2019-10-25 | 苏州浪潮智能科技有限公司 | A kind of the pin wiring inspection method and relevant apparatus of differential lines |
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| CN112446188A (en) | 2021-03-05 |
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