JP2015176550A - Circuit diagram change device, method, program and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automate wiring processing and to reduce changes to be applied to a former circuit diagram when generating a new circuit diagram by changing former symbols in the former circuit diagram into new symbols.SOLUTION: A circuit diagram change device 100 includes: a storage part 104 storing symbol correspondence information 113 making former symbols and new symbols correspondent; wiring restriction generation means for generating restriction information relating to a wiring length from the former circuit diagram; wiring restriction change means for generating restriction information relating to a new wiring length in the case where the former symbols are changed into the correspondent new symbols in the restriction information relating to the wiring length of the former circuit diagram, on the basis of the symbol correspondence information 113; and wiring processing means for generating the new circuit diagram by replacing the former symbols with the new symbols in the former circuit diagram and adjusting the wiring length in such a manner that the wiring length becomes neither too long not too short, on the basis of the restriction information relating to the new wiring length.

Description

  The present invention changes a circuit diagram in which a symbol of a circuit element (for example, a MOS transistor (field effect transistor), a resistor, a capacitor) in an existing circuit diagram is changed to a symbol of a new circuit element to generate a new circuit diagram. The present invention relates to an apparatus, a circuit diagram changing method, a circuit diagram changing program, and a computer readable recording medium recording the circuit diagram changing program.

  Conventionally, in an electronic circuit such as a semiconductor integrated circuit, in an existing circuit diagram (information including a netlist (information indicating a logical connection relationship of circuit elements), a circuit element form (shape and terminal position), and wiring length). When the circuit element (old circuit element) is changed to a new circuit element (new circuit element) and a new circuit diagram (new circuit diagram) is generated, the old circuit element in the existing circuit diagram (old circuit diagram) A symbol (old symbol) is changed to a new circuit element symbol (new symbol).

  When the old symbol is replaced with the new symbol and the terminal position of the new circuit element is different from the terminal position of the old circuit element, the new circuit element and other circuit elements in the circuit diagram are not properly connected ( For example, the wiring is cut or becomes redundant. Therefore, it is necessary to redo the wiring so that the circuit elements are properly connected.

  Conventionally, when an old symbol in a circuit diagram is changed to a new symbol, a first method is to obtain a new circuit diagram by manually replacing the old symbol in the old circuit diagram with a new symbol. In this method, when the terminal position represented by the symbol is changed, it is necessary to rework the wiring by hand, so that there is a problem that the work of changing the circuit diagram becomes extremely complicated.

  As a second method, a netlist (old netlist) is generated from the old circuit diagram, and a new netlist (new netlist) is generated by replacing the old circuit elements in the old netlist with new circuit elements. There is a method for generating a new circuit diagram from this new netlist. In this method, a new circuit that is appropriate as a logical circuit configuration can be obtained, but the layout of circuit elements in the old circuit diagram is not reflected in the new circuit diagram at all. There is a problem that the arrangement of the circuit elements in the figure is greatly changed and the new circuit diagram is difficult to use.

  The invention described in Patent Document 1 is an invention related to a layout change of a semiconductor integrated circuit, and is not an invention of changing a circuit element in a circuit diagram.

JP 2005-129869 A

  The present invention has been made in view of the above problems. When a new circuit diagram is generated by changing an old symbol in an old circuit diagram to a new symbol, the wiring process is automated and a change to be added to the old circuit diagram is made. The challenge is to reduce it.

  According to a first aspect of the present invention, there is provided a circuit diagram changing apparatus for generating a new circuit diagram by changing an old symbol of an old circuit element in an old circuit diagram to a new symbol of a new circuit element. Based on the symbol association information, storage means for storing symbol association information associated with a new symbol, wiring constraint generation means for generating constraint information regarding the wiring length from the old circuit diagram, and the old circuit diagram Wiring constraint changing means for generating constraint information relating to a new wiring length when the old symbol is changed to the corresponding new symbol in the constraint information relating to the wiring length, and the old symbol in the old circuit diagram as the new symbol The new circuit diagram is replaced by adjusting the wiring length so that the wiring length is not excessive or insufficient based on the constraint information on the new wiring length. Schematic changes and wherein there is provided by comprising a routing processing means to generate.

  According to a second aspect of the present invention, there is provided a circuit diagram changing method for generating a new circuit diagram by changing an old symbol of an old circuit element in an old circuit diagram to a new symbol of a new circuit element. The old symbol in the constraint information regarding the wiring length of the old circuit diagram based on the wiring constraint generation step for generating the constraint information regarding the wiring length from the diagram and the symbol association information in which the old symbol and the new symbol are associated with each other A wiring constraint changing step for generating constraint information relating to a new wiring length when the symbol is changed to the corresponding new symbol, replacing the old symbol with the new symbol in the old circuit diagram, and the constraint relating to the new wiring length And a wiring processing step for generating the new circuit diagram by adjusting the wiring length so that the wiring length does not become excessive or insufficient based on the information. Schematic changes and wherein there is provided.

According to a third aspect of the present invention, there is provided a circuit diagram changing program that causes a computer to execute the circuit diagram changing method.
According to a fourth aspect of the present invention, there is provided a computer-readable recording medium characterized by recording the circuit diagram changing program.

According to the circuit diagram changing device of the present invention, when a new circuit diagram is generated by changing an old symbol in an old circuit diagram to a new symbol, wiring processing is automated and changes to be made to the old circuit diagram are reduced. Is possible.
Further, according to the circuit diagram changing method of the present invention, when the old symbol in the old circuit diagram is changed to the new symbol and the new circuit diagram is generated, the wiring process is automated and the change to the old circuit diagram is reduced. It becomes possible to do.

In addition, when the computer executes the circuit diagram changing program of the present invention to change the old symbol in the old circuit diagram to a new symbol and generate a new circuit diagram, the wiring process is automated and the old circuit diagram It is possible to reduce the number of changes to be made.
Also, by causing the computer to execute the circuit diagram changing program recorded on the recording medium of the present invention, the wiring process is automated when the old symbol in the old circuit diagram is changed to the new symbol and a new circuit diagram is generated. At the same time, it is possible to reduce changes to the old circuit diagram.

It is a block diagram of the circuit diagram change device concerning an embodiment of the invention. It is a flowchart of the circuit diagram change apparatus which concerns on embodiment of this invention. It is a circuit diagram for demonstrating operation | movement of embodiment of this invention. It is a graph block diagram for demonstrating operation | movement of embodiment of this invention. It is a graph block diagram for demonstrating operation | movement of embodiment of this invention. It is a circuit diagram for demonstrating operation | movement of embodiment of this invention.

  Hereinafter, a circuit diagram changing apparatus, a circuit diagram changing method, a circuit diagram changing program for causing a computer to execute the circuit diagram changing method, and a computer readable record in which the circuit diagram changing program is recorded The medium will be described with reference to the drawings. In the drawings, the same parts are denoted by the same reference numerals.

FIG. 1 is a block diagram of a circuit diagram changing device according to an embodiment of the present invention.
In FIG. 1, a circuit diagram changing apparatus 100 according to an embodiment of the present invention converts a symbol (old symbol) of a circuit element (old circuit element) in an existing circuit diagram (old circuit diagram) into a new circuit element (new circuit). A new circuit diagram (new circuit diagram) is generated by changing to the symbol (new symbol) of the element.

  The circuit diagram change device 100 includes an input unit 101, a circuit diagram change processing unit 102, a display unit 103, and a storage unit 104. The circuit diagram changing device 100 can be configured by a computer including an input unit such as a keyboard and a mouse, a display unit, a central processing unit (CPU), and a storage unit. A circuit diagram changing device by causing the computer to install and execute a circuit diagram changing program recorded in a computer-readable recording medium (for example, the storage unit 104 or a semiconductor memory (not shown) or a CD-ROM). 100 can function.

The input unit 101 is for inputting data and commands, and is configured by an input interface such as a mouse, a keyboard, or a USB (Universal Serial Bus) terminal.
When the old circuit element in the old circuit diagram is changed to the new circuit element, the circuit diagram change processing unit 102 changes the old symbol of the old circuit element to the new symbol of the new circuit element and generates a new circuit diagram. Have.

  The circuit diagram is information including information (net list) representing the logical connection relationship of the circuit elements and information representing the relative positional relationship of the circuit elements. Circuit elements include circuit elements such as MOS transistors, resistors, capacitors, and wiring. The relative positional relationship between the circuit elements includes a positional relationship such as a distance between a terminal (also referred to as an end point) of a circuit element such as a MOS transistor, a wiring intersection, or a wiring end point.

  The storage unit 104 stores circuit diagram information 112 including an old circuit diagram and a new circuit diagram, and symbol association information 113 which is information in which an old symbol is associated with a new symbol that replaces the old symbol. The symbol of the circuit element is information representing the shape of the circuit element and the terminal position in a graphic form, and includes information on the shape of the circuit element and the terminal position.

  The symbol association information 113 is information in which old and new symbols are associated with each other, including information on the shape and terminal position of the circuit element represented as a graphic, by associating the names of the old and new circuit elements. When the user inputs data in which the old circuit element name is associated with the new circuit element name that replaces the old circuit element name from the input unit 101, the save processing unit 111 associates the old and new symbols of the old and new circuit elements with each other. The information 113 is stored in the storage unit 104.

As data included in the circuit diagram information 112, old circuit diagram data to be changed is stored in advance. When the old circuit diagram data is input from the input unit 101, the storage processing unit 111 stores the old circuit diagram data as a part of the circuit diagram information 112.
The storage unit 104 also stores other data and programs necessary for circuit diagram change processing.
The display unit 103 displays information obtained during the circuit diagram change process of the circuit diagram change processing unit 102 and the result of the circuit diagram change process.

  The circuit diagram change processing unit 102 includes a horizontal wiring constraint generation unit 105 and a vertical wiring constraint generation unit 108 that generate constraint information related to the wiring length from the circuit diagram. Further, the circuit diagram change processing unit 102 generates, based on the symbol association information 113, constraint information related to the new wiring length when the old symbol is changed to the corresponding new symbol in the constraint information related to the wiring length of the old circuit diagram. A horizontal wiring constraint changing unit 106 and a vertical wiring constraint changing unit 109 are provided.

  Further, the circuit diagram change processing unit 102 replaces the old symbol with the new symbol in the old circuit diagram, and adjusts the wiring length so that the wiring length does not become excessive or insufficient based on the constraint information regarding the new wiring length. That is, the wiring processing means (the horizontal wiring processing unit 107 and the vertical wiring) generates a new circuit diagram by adjusting the wiring length so as not to cause disconnection or redundant wiring based on the constraint information on the new wiring length. A processing unit 110).

  Here, the horizontal wiring constraint generation unit 105 is configured to generate first constraint information related to the wiring length in the first direction (the horizontal direction in the present embodiment) from the old circuit diagram, thereby generating the vertical wiring constraint generation. The unit 108 can be configured to generate second constraint information related to the wiring length in the second direction (vertical direction in the present embodiment) orthogonal to the first direction from the old circuit diagram. The vertical direction may be the first direction and the horizontal direction may be the second direction.

  In addition, the lateral wiring constraint changing unit 106, based on the symbol association information 113, provides the constraint information regarding the new wiring length when the old symbol is changed to the corresponding new symbol in the first direction with respect to the first constraint information. Can be configured to generate. Further, the vertical wiring constraint changing unit 109 generates constraint information related to the new wiring length when the old symbol is changed to the corresponding new symbol in the second direction with respect to the second constraint information based on the symbol association information. Can be configured to.

  Further, the horizontal wiring constraint changing unit 106 generates constraint information related to a new wiring length by changing the first constraint information only for the portion changed to the new symbol in the first direction based on the symbol association information. It can be constituted as follows. Further, the vertical wiring constraint changing unit 109 generates constraint information related to a new wiring length by changing the second constraint information only for the portion changed to the new symbol in the second direction based on the symbol association information. It can be constituted as follows.

  In addition, the wiring processing means replaces the old symbol with the new symbol in the old circuit diagram and performs wiring so that the wiring length does not become excessive or insufficient based on the constraint information on the new wiring length in the first direction and the second direction. A new circuit diagram can be generated by adjusting the length.

  The input unit 101 constitutes an input unit, the circuit diagram change processing unit 102 constitutes a circuit diagram change unit, the display unit 103 constitutes a display unit, and the storage unit 104 constitutes a storage unit. Further, the horizontal wiring constraint generation unit 105 and the vertical wiring constraint generation unit 108 constitute a wiring constraint generation unit. Further, the horizontal wiring constraint changing unit 106 and the vertical wiring constraint changing unit 109 constitute wiring constraint changing means. The horizontal wiring processing unit 107 and the vertical wiring processing unit 110 constitute a wiring processing unit.

FIG. 2 is a flowchart of the circuit diagram change device 100 according to the embodiment of the present invention, and shows processing performed by the circuit diagram change processing unit 102.
FIG. 3 is a circuit diagram for explaining the operation of the embodiment of the present invention, and shows an example of a circuit diagram (old circuit diagram) before the change. In FIG. 3, 301 is an input terminal, 304 is an output terminal, and 302 and 303 are MOS transistors. P1, P5 to P9, and P11 to P14 are end points, and P2 to P4 and P10 are intersections.

  The end point or intersection point symbol Pn (number n is a positive integer) is set so that the number n increases in the predetermined direction. In the present embodiment, the symbol n in the right direction (the direction in which the X coordinate increases) is set. It is set to increase as it goes and to increase as it goes downward (the direction in which the Y coordinate increases). Since the direction in which the number of the symbol P increases can be set for convenience, the direction in which the number increases may be set so that at least one of the X coordinate and the Y coordinate is opposite to the above. .

FIG. 4 is a graph configuration diagram for explaining the operation of the embodiment of the present invention, and is a diagram showing a graph configuration of wiring constraints corresponding to the circuit diagram of FIG.
In FIG. 4, the graph structure includes nodes (end points and intersections) and edges (constraints). The restriction defines the wiring length, and the numerical value in FIG. 4 represents the wiring length when the predetermined length is “1”.

Nodes having the same position (X coordinate) in the horizontal direction (X direction in FIG. 3) and directly connected to each other are defined to form one island (potential island; rounded square in FIG. 4).
For example, the intersection points P2, P3, and P4 form one island, and the end points P7 and P8 form one island. The end points P9 and P11 and the intersection point P10 form one island. The end points P12 and P13 form one island. Each of the end points P1 and P14 independently forms one island.

  In FIG. 4, the predetermined length is “1”, and the horizontal wiring length between the terminal P1 and the intersection P3 is “5”. The horizontal wiring length between the intersections P2, P4 and the terminals P5, P6 is “5”, respectively. In the MOS transistor 302, the horizontal wiring length between the terminal P5 and the terminals P8 and P9 is “7”. In the MOS transistor 303, the horizontal wiring length between the terminal P6 and the terminals P11 and P12 is “7”. The horizontal wiring length between the intersection P10 and the terminal P14 is “5”.

  FIG. 5 is a graph configuration diagram for explaining the operation of the embodiment of the present invention, and is a graph configuration diagram when the old circuit element is changed to the new circuit element in the graph configuration diagram of FIG. 4. In the present embodiment, an example is shown in which the MOS transistor 303 is changed to a MOS transistor 601 having a different shape and terminal position. The horizontal wiring length between the terminal P6 of the MOS transistor 303 and the terminals P11 and P12 is “7”, but that of the MOS transistor 601 is “8”.

  Based on the symbol association information 113, the horizontal wiring constraint changing unit 106 changes the constraint information (see FIG. 4) in the old circuit diagram only for the portion that has been changed to the new symbol in the horizontal direction, so that a new wiring length is obtained. Generate constraint information about. Further, the vertical wiring constraint changing unit 109 changes the constraint information in the old circuit diagram only for the portion changed to the new symbol in the vertical direction based on the symbol association information 113, thereby limiting the constraint information regarding the new wiring length. Is generated. In this way, by changing the constraint information only for the changed part, the relative positional relationship between circuit elements included in the part other than the changed part does not change in the part other than the part where the symbol is changed. Therefore, it is possible to reduce changes in appearance and make it easier to see the new circuit diagram.

  FIG. 6 is a circuit diagram for explaining the operation of the embodiment of the present invention. The MOS transistor 303 (old circuit element) in the old circuit diagram of FIG. 3 is replaced with a MOS transistor 601 (new circuit element). FIG. 6 shows a new circuit diagram in which the wiring length is adjusted so as not to cause disconnection or redundant wiring, that is, the wiring length is adjusted so that the wiring length is not excessive or insufficient.

The operation when the MOS transistor 303 in the old circuit diagram shown in FIG. 3 is changed to the MOS transistor 601 will be described below with reference to FIGS.
The horizontal wiring / wiring constraint generation unit 105 reads the circuit diagram of FIG. 3 included in the circuit diagram information 112 of the storage unit 104, and generates a wiring constraint graph structure representing constraints on the horizontal wiring length as shown in FIG. Generate (processing step S201 in FIG. 2).

  Next, the horizontal wiring constraint changing unit 106 refers to the symbol association information 113 and differs in the horizontal position of the terminals P6, P11, P12 of the MOS transistor 303 and the terminals P6, P11, P12 of the MOS transistor 601. Identify In this example, the horizontal length between the terminals P6 and P11, P12 in the MOS transistor 303 is “7”, whereas in the MOS transistor 601, the horizontal length between the terminals P6, P11, and P12. Each length is as long as “8”.

  In the wiring constraint graph structure of FIG. 4, the horizontal wiring constraint changing unit 106 sets the horizontal length “7” between the terminal P6 and the terminals P11 and P12 to the horizontal length between the terminal P6 and the terminals P11 and P12 in the MOS transistor 601. The direction length is changed to “8” to change to the wiring constraint graph structure of FIG. 5 (step S202).

  This means that in the circuit diagram, the terminals P11 and P12 move by “1” in the right direction (the direction in which the X coordinate increases) as compared with the case of FIG. In the present embodiment, the horizontal coordinate of the island is set so as to comply with the restriction that a larger horizontal coordinate (that is, a larger horizontal number Pn) is adopted. Since the terminal P11 is the largest in the island, as the terminal P11 moves “1” in the right direction, the island including the terminal 11 also moves “1” in the right direction. Therefore, not only the terminals P9 and P10 that form the island but also the wiring that connects the terminals P9, 10 and P11 moves “1” in the right direction together with the island.

The horizontal wiring constraint changing unit 106 changes the constraint information in the old circuit diagram only for the portion changed to the new symbol in the horizontal direction based on the symbol association information 113, so the right side (moving side) of the MOS transistor 601. ) Are connected together, the plurality of circuit elements move together, but the positional relationship between the plurality of circuit elements does not change. Therefore, changes in the circuit diagram can be reduced, and the new circuit diagram is easy to use.
In the present embodiment, the vertical direction (Y direction) coordinates of the island are also set in the vertical direction so as to comply with the restriction of adopting a larger vertical direction coordinate. The same processing as that in the horizontal direction is also performed.

  The lateral wiring processing unit 107 has a length “1” so that the end of the wiring at the terminal P9 position of the MOS transistor 302 in FIG. 3 is connected again to the terminal P9 of the MOS transistor 302 as shown in FIG. Is added in the left direction (the direction in which the X coordinate decreases) to extend the wiring length, thereby adjusting the wiring length between the terminal P9, the intersection P10, and the terminal P11 of the MOS transistor 302 (step S203). ). In FIG. 6, the wiring 602 is shown as being thicker than the other wiring so that the wiring 602 is clear, but the wiring 602 can be displayed with the same thickness as the other wiring.

Through the processing steps S201 to S203, the wiring length is adjusted so that the wiring length does not become excessive or insufficient when the MOS transistor 303 is replaced with the MOS transistor 601 in the lateral direction.
Following the adjustment process of the wiring length in the horizontal direction, the adjustment process of the wiring length in the vertical direction (Y direction) is performed.
That is, the vertical wiring constraint generation unit 108 uses the circuit diagram of FIG. 6 generated by the horizontal wiring processing unit 107 to generate a wiring constraint graph structure that represents constraints on the vertical wiring length similar to FIG. (Processing step S204 in FIG. 2).

Next, the vertical wiring constraint changing unit 109 refers to the symbol association information 113 and differs in the vertical positions of the terminals P6, P11, P12 of the MOS transistor 303 and the terminals P6, P11, P12 of the MOS transistor 601. Identify
When the terminal positions of the MOS transistor 303 and the MOS transistor 601 are different from each other, the vertical wiring restriction changing unit 109 uses the MOS transistor 303 in the wiring restriction graph structure generated by the vertical wiring wiring restriction generation unit 108 for different terminals. The vertical length is changed to the vertical length in the MOS transistor 601 to change to a new vertical wiring constraint graph structure (step S205).

  Similar to the horizontal wiring constraint changing unit 6, the vertical wiring constraint changing unit 109 changes the constraint information in the old circuit diagram only for the portion changed to the new symbol in the vertical direction. Even when a plurality of circuit elements are connected, the plurality of circuit elements move together, and the positional relationship between the plurality of circuit elements does not change. Therefore, changes in the circuit diagram can be reduced.

Based on the new vertical wiring constraint graph structure, the vertical wiring processing unit 110 performs wiring so that the wiring length does not become excessive or short when the MOS transistor 303 is replaced with the MOS transistor 601 in the vertical direction. The length adjustment process is performed and output as new circuit diagram data (step S206).
As the new circuit diagram data, a circuit diagram obtained by replacing the MOS transistor 303 with the MOS transistor 601 and adjusting the wiring so that the wiring length does not become excessive or insufficient is obtained.
The new circuit diagram data is displayed by the display unit 103 or stored as one of the circuit diagram information 112 in the storage unit 104.

  Here, the processing steps S201 and S204 are the circuit diagram changing method for generating a new circuit diagram by changing the old symbol of the old circuit element in the old circuit diagram to the new symbol of the new circuit element. A wiring constraint generation step for generating constraint information regarding is configured. Processing steps S202 and S205 are based on the symbol association information in which the old symbol and the new symbol are associated with each other, and the new wiring when the old symbol is changed to the corresponding new symbol in the constraint information regarding the wiring length of the old circuit diagram A wiring constraint changing step for generating constraint information regarding the length is configured. Processing steps S203 and S206 replace the old symbol with the new symbol in the old circuit diagram, and adjust the wiring length so that the wiring length does not become excessive or insufficient based on the constraint information regarding the new wiring length. The wiring processing step for generating

  In the example shown in FIGS. 3 and 6, the difference between the MOS transistor 303 and the MOS transistor 601 is only the difference in the horizontal direction of the terminals P6, P11, and P12, and there is no difference in the vertical direction. S204 to S206 are not necessary. In this case, new circuit diagram data is output from the lateral wiring processing unit 107.

As described above, according to the circuit diagram changing device 100 according to the embodiment of the present invention, the wiring process is automated when the old symbol in the old circuit diagram is changed to the new symbol and the new circuit diagram is generated. At the same time, it is possible to avoid changing the old circuit diagram as much as possible.
Further, according to the circuit diagram changing method according to the embodiment of the present invention, when the old symbol in the old circuit diagram is changed to the new symbol and the new circuit diagram is generated, the wiring process is automated and the old circuit It is possible to avoid changing the figure as much as possible.

  Also, when the computer executes the circuit diagram change program according to the embodiment of the present invention, the wiring process is automated when the old symbol in the old circuit diagram is changed to the new symbol and a new circuit diagram is generated. At the same time, it is possible to avoid changing the old circuit diagram as much as possible.

  In addition, when a circuit diagram changing program recorded on the recording medium according to the embodiment of the present invention is executed by a computer, an old symbol in the old circuit diagram is changed to a new symbol and a new circuit diagram is generated. In addition to automating the wiring process, it is possible to prevent the old circuit diagram from being changed as much as possible.

In this embodiment, the wiring between the end points is added so as not to be excessive or insufficient in accordance with the change of the symbol. However, depending on the type of the symbol, the wiring is shortened or lengthened to be excessive or insufficient. The wiring change process is performed so that the wiring length is free.
Further, in this embodiment, the configuration is such that the vertical wiring length is changed after the horizontal wiring length is changed, but the horizontal wiring length is changed after the vertical wiring length is changed. You may comprise as follows.

  The circuit elements used in the circuit diagrams of the analog circuit and the digital circuit can be changed and used for processing for creating a new circuit diagram.

DESCRIPTION OF SYMBOLS 100 ... Circuit diagram change apparatus 101 ... Input part 102 ... Circuit diagram change process part 103 ... Display part 104 ... Memory | storage part 105 ... Horizontal direction wiring restrictions production | generation part 106 ... Horizontal Directional wiring constraint change unit 107... Horizontal direction wiring processing unit 108... Vertical direction wiring constraint generation unit 109... Vertical direction wiring constraint change unit 110. ... Output terminals 302, 303, 601 ... MOS transistors 602 ... Wirings P1, P5-P9, P11-P14 ... End points P2-P4, P10 ... Intersections

Claims (8)

In the circuit diagram changing device for generating a new circuit diagram by changing the old symbol of the old circuit element in the old circuit diagram to the new symbol of the new circuit element,
Storage means for storing symbol association information in which the old symbol and the new symbol are associated;
Wiring constraint generation means for generating constraint information related to the wiring length from the old circuit diagram;
Based on the symbol association information, wiring constraint changing means for generating constraint information related to a new wiring length when the old symbol is changed to the new symbol corresponding to the constraint information related to the wiring length of the old circuit diagram;
In the old circuit diagram, the old symbol is replaced with the new symbol, and the new circuit diagram is generated by adjusting the wiring length so that the wiring length does not become excessive or insufficient based on the constraint information regarding the new wiring length. A circuit diagram changing device comprising: a wiring processing means for performing the processing.   2. The wiring restriction changing unit generates restriction information relating to the new wiring length by changing restriction information relating to a wiring length of the old circuit diagram only for a portion where a symbol is changed. Circuit diagram change device. The wiring constraint generation means generates, from the old circuit diagram, first constraint information related to a wiring length in a first direction and second constraint information related to a wiring length in a second direction perpendicular to the first direction,
The wiring constraint changing unit changes the old symbol to the new symbol corresponding to the first direction and the second direction with respect to the first constraint information and the second constraint information based on the symbol association information. Generate constraint information on the new wiring length of
The wiring processing means replaces the old symbol with the new symbol in the old circuit diagram, and does not cause excess or deficiency in the wiring length based on the constraint information regarding the new wiring length in the first direction and the second direction. 3. The circuit diagram changing device according to claim 1, wherein the new circuit diagram is generated by adjusting the wiring length as described above. In the circuit diagram changing method for generating a new circuit diagram by changing the old symbol of the old circuit element in the old circuit diagram to the new symbol of the new circuit element,
A wiring constraint generation step of generating constraint information regarding the wiring length from the old circuit diagram;
Based on symbol association information in which the old symbol and the new symbol are associated with each other, the new wiring length when the old symbol is changed to the corresponding new symbol in the restriction information on the wiring length of the old circuit diagram A wiring constraint changing step for generating constraint information;
In the old circuit diagram, the old symbol is replaced with the new symbol, and the new circuit diagram is generated by adjusting the wiring length so that the wiring length does not become excessive or insufficient based on the constraint information regarding the new wiring length. A circuit diagram changing method comprising: a wiring processing step to perform.   The wiring constraint changing step is a step of generating constraint information regarding the new wiring length by changing constraint information regarding the wiring length of the old circuit diagram only for a portion where a symbol is changed. Item 5. The circuit diagram changing method according to Item 4. The wiring constraint generation step generates, from the old circuit diagram, first constraint information related to a wiring length in a first direction and second constraint information related to a wiring length in a second direction perpendicular to the first direction,
When the wiring constraint changing step changes the old symbol to the new symbol corresponding to the first direction and the second direction with respect to the first constraint information and the second constraint information based on the symbol association information. Generate constraint information on the new wiring length of
The wiring processing step replaces the old symbol with the new symbol in the old circuit diagram, and does not cause excess or deficiency in the wiring length based on the constraint information regarding the new wiring length in the first direction and the second direction. 6. The circuit diagram changing method according to claim 4, wherein the new circuit diagram is generated by adjusting the wiring length as described above.   A program for changing a circuit diagram, which causes a computer to execute the circuit diagram changing method according to any one of claims 4 to 6.   A computer-readable recording medium comprising the circuit diagram changing program according to claim 7 recorded thereon.

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