JP2795556B2 - Automatic correction method of circuit drawing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic CAD system for designing a print forming an electronic circuit, and to a circuit design data for forming an electronic circuit on a printed circuit board and a board design data for mounting and designing the printed circuit board. Automatically finds the change data between the two, so that the circuit design data can be corrected according to the board design change data.
The present invention relates to a method for automatically correcting a circuit drawing.

[0002]

2. Description of the Related Art In the course of designing a printed circuit board, two different courses are required: circuit design, so-called logical design, and board design, so-called physical design. Conventionally, the above two designs are often performed in different departments or establishments that specialize in each department. Therefore, design data of circuit drawings in which each circuit component is described by an electrical symbol, or a board drawing called so-called artwork Have individual design data. Therefore, it is common that the design data can be changed individually.

[0003] In a board design, which is a physical design, design changes are often made due to improvements in physical characteristics such as performance of electronic components to be used and circuit performance on the board. After the board design is changed, the realized circuit must be changed again as a circuit drawing in order to use it for data and logical inspection.

For this reason, the circuit drawing is manually corrected. However, in a conventional design site, since the designer of the circuit drawing and the designer of the board drawing are different from each other, physical information such as an instruction for changing information is mutually exchanged. And made changes based on the know-how and experience of each designer.

Further, in various devices using the current computer, when the board design data and the circuit design data are different,
It is difficult to exchange information with each other, and accurate information cannot be transmitted.

[0006]

However, when the correction is performed manually as described above, the work efficiency differs due to the difference in know-how between the designer of the circuit drawing and the designer of the board drawing. In addition, there is a lot of waste, for example, accurate correction cannot be performed due to an error in transmission of information between each other.

Therefore, an object of the present invention is to use a computer to find differences in circuit design data with respect to board design data, automatically add / delete the data, and maintain consistency between data, as well as work efficiency. It is an object of the present invention to provide a method for automatically correcting a circuit drawing for creating a visually beautiful circuit drawing.

[0008]

Means and operation for solving the problems] The present invention includes a plurality
A circuit design data consisting of circuit diagram data, compared with the substrate design data modification is applied after being designed on the basis of the circuit design data, both data of a circuit diagram that require modified from data inconsistencies Search and find the correction
The data of the searched circuit drawing is corrected so as to match the added board design data, and the correction result is registered.
An automatic correction method of a circuit diagram consisting in recording.

The present invention also relates to a circuit diagram having at least two circuit components , wherein a plurality of data
Circuit design data consisting of the following and the board design data that has been modified after being designed based on the circuit design data, and a circuit that requires correction due to a mismatch between the two data
Find the drawing data, searches the obstacle existing between circuit components in data <br/> data of the retrieved circuit diagram,
A line segment connecting the respective circuit elements, modify the data of the retrieved circuit diagram by creating forms a bending point of 2 to bend in order to avoid the obstacle
And registering the correction result .

[0010] by a computer in the present invention, the design data of the designed modified substrate drawings, corresponding multiple schematic
It makes a comparison between the design data of the circuit diagram consisting of the surface of the data, data necessary modifications of the circuit diagram for different parts
By applying the data to the data, the consistency between the design data can be matched without any manual correction. Also, when making corrections to each circuit drawing data,
Obstacles existing between components can be automatically connected up to two bends
Corrections can be made to avoid it.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.
The present invention is not limited to the following examples. FIG.
FIG. 1 is a block diagram illustrating a schematic configuration of a computer used in an embodiment. In the figure, a control device 1 includes a CPU,
Program memory, I / O interface, CRTC
And the like, based on information input from the input device 2, the output device 3, the CRT 4, the database file 5,
6,... N, the circuit design database DB1 and the board design database DB2 are controlled. The input device 2 is configured by combining a keyboard, a mouse, a light pen, an image scanner, and the like. The output device 3 is configured by combining a line printer, a page printer, an XY plotter, and the like. Database file 5
N, various currently known memory devices can be applied to the circuit design database DB1 and the board design database DB2.

Designed circuit drawings are usually composed of a plurality of sheets, and are stored in separate database files 5 to N, respectively. Then, the circuit design database files are read out from the respective database files 5 to N, converted into one database by the control device 1, and stored in the circuit design database DB1. The board design database DB2 stores board design data that has been modified based on the circuit design data stored in the circuit design database DB1. This is schematically shown in FIG. 2 as shown in FIG. That is, FIG. 2A shows the state of the database files 5 to N, and FIG. 2B shows that of the board design database DB2.

FIG. 3 is a schematic flowchart of the embodiment. Automatic correction of a circuit diagram in the embodiment includes searching for a correction location (step S1), determining the presence or absence of correction data (step S2), deleting data (step S3), adding data (step S4), and a path up to a turn. Is automatically searched to generate connection data (step S5), the connection data is named (step S6), and registered in a database file (step S7).

That is, based on the connection relationship read from the board design data, the corresponding data is searched from a circuit diagram usually composed of a plurality of boards, and a correction portion is found and corrected.

Since the designed circuit drawings are stored as separate circuit design database files, the files are read and converted into one database. From this database, the difference between data relating to a figure (hereinafter, referred to as a symbol) representing one electrical function on a circuit diagram, data relating to connection information, etc. and board design data is inspected, and data required to be changed is examined. Search for a file. By correcting the searched circuit drawing data, only the corresponding drawing is corrected.

A point indicating a connection line between symbols indicating, for example, a NAND gate or a contact point between the connection lines (hereinafter referred to as a node) which has been corrected by the board design data and has lost the connection relationship.
Remove.

FIG. 4 is a flowchart of an algorithm for comparing board design data and circuit design data and searching for a corrected drawing. Since the designed circuit drawings are stored as separate circuit design database files, the files are read and converted into one database (step S10). From this database, the difference between the data related to the symbol, the data related to the connection information, etc. and the board design data is compared and inspected (Step S).
11) After determining the presence or absence of the correction data (step S13), a file having the corresponding data is searched based on the result (step S13). Correction is performed on the retrieved circuit drawing data (step S14). Then, it is determined whether all the data have been compared (step S15), and only the corresponding drawing is corrected. Next, connection lines and nodes between symbols that have been corrected in the board design data and have no connection relation are deleted.

FIG. 5 is a flowchart of an algorithm for sequentially searching for connection lines connected to the pins of a symbol set in a symbol having no connection relation and deleting the connection lines connected to the pins or nodes of the symbol. It is. FIG. 6 shows an example of the correction of the connection line by changing the connection relation.

As shown in FIG. 6A, the symbol L1
When the connection relationship between the pin P1 of the symbol L2 and the pin P2 of the symbol L2 is lost, the connection line 1 connected to the pin P1 of the symbol L1 is extracted from the circuit design database (step S20). If the node N1 exists on the extracted connection line (step S21), the connection line extracted at the position of the node N1 is divided (step S22), and the extracted connection line 1 and the node N1 are deleted (step S23). ). When the node N1 is deleted, the state of the connection lines other than the deleted connection line is checked, and if a node is required, a node is created (step S24). The process ends regardless of whether the node needs to be recreated.

After step S21, it is determined whether or not another end point of the extracted connection line is connected to the node (step S25).
If not, it is determined whether another end point of the connection line is connected to the symbol pin (step S26). If there is a symbol pin connected to the end point on the opposite side of the extracted connection line, the extracted connection line is deleted (step S27), and the process ends. FIG.
If the extracted connection line l is not connected to the symbol pin or node but is connected to the end point of another connection line m (step S28), the extracted connection line l is deleted. The connection state is checked again using the connection line m as the extracted connection line (step S29). If there is no connection to the extracted connection line, the connection line is deleted and the process is terminated (step S27). By repeating these operations, only the portion to be deleted is deleted without affecting other connection relationships. Further, for the electronic component added by the board design data, a symbol for newly connecting to the circuit drawing is searched for from the registered symbols and added. Further, in order to connect the pins of the symbol with respect to the connection relationship corrected and added in the board design data, automatic connection for generating two bending points is performed.

FIG. 7 is a flow chart showing an automatic connection algorithm for generating a bending point up to two bends in order to connect two points. 8, 9, and 1
0 indicates an example of automatic search / connection of connection lines.

When a connection is made from the pin P3 of the symbol L3 to the pin L4 of the symbol L4 as shown in FIG. 8 (1), as shown in FIG. An area in which the shapes of the symbols L3 and L4 are included is determined (step S30). As shown in (3) of FIG. 8, the direction of the lead line is determined according to the position of the symbol pin. If there is a symbol pin on the vertical side of the rectangle indicating the area, a horizontal connection line is drawn. If there is a symbol pin on the horizontal side of the rectangle indicating the area, a vertical connection line is drawn ( Step S31). When the drawing direction is determined, as shown in (4) of FIG. 8, connection line candidates are drawn from pins P3 and P4 of both symbols in a drawable direction until an obstacle is hit (step S32). Here, when both connecting lines intersect as shown in FIG. 9 (5), a connecting line is created at the intersection (steps S33, S34).

As shown in FIG. 9 (6), an intermediate point is calculated from the positions of the pins of each symbol, and a candidate for a connection line perpendicular to the drawn connection line such as LX in the figure is obtained (step). S35). If the candidate does not hit other obstacles,
If both connecting lines intersect, a connecting line is created at the intersection (steps S36, S37, S38). FIG.
If the candidate hits the obstacle G or does not intersect both connecting lines as in (7), the candidate is discarded.
Next, like LX1 in (8) of FIG. 9, a candidate for a connection line is obtained at a coordinate moved from the candidate by the width defined by the designer (step S39) and inspected. Similarly, if the connection cannot be made, connection line candidates are obtained and inspected like LX1, LX2, LX3. If none of the candidates can be connected, the end points of the connection lines drawn from the pins of both symbols are connected. (Step S40) Inspection of connection line candidates is repeated, and candidates that do not hit an obstacle and intersect with connection lines drawn from both sides are found. As a result of inspecting (1) in FIG. 8, a connection line as shown in (9) in FIG. 10 is obtained. (10) in FIG. 10 shows a case where the connection route is not found as a result of the search. When connecting symbols between a plurality of drawings, in order to determine the connection relationship, a name for distinguishing the connection lines connected to each symbol from other connection lines is automatically added. That is, when symbols having a connection relationship exist in different circuit diagrams, it is necessary to assign a signal line name to the connection line in order to determine the connection relationship. As shown in FIG. 11, a character string (SIGNAL in the figure) and a internally stored number (001 in the figure) are included in the signal line name.
, A signal line name different from other connection relations is automatically given. Finally, when the necessary corrections are completed, the correction results are registered in the circuit design database, so that the circuit drawing data corrected by the data changed at the time of board design can be reused in another device or the like. .

[0024]

According to the present invention, the design change data of the data of the board design, design modified data of each circuit drawing data <br/> beautiful in appearance, and create a high working efficiency, Noboru
Can be recorded. Also, change the design of each circuit drawing data.
Exists between circuit components when creating updated data
Correction to avoid obstacles by automatic connection up to 2 bends
Can be applied to the data of the circuit diagram.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an electronic computer applied to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a storage state of circuit design data and board design data.

FIG. 3 is a schematic flowchart showing the operation of the embodiment.

FIG. 4 is a flowchart of an algorithm for searching for a corrected drawing in the embodiment.

FIG. 5 is a flowchart of an algorithm for deleting a connection line in the embodiment.

FIG. 6 is an explanatory diagram for explaining connection line correction in the embodiment.

FIG. 7 is a flowchart showing an algorithm of automatic connection for generating a bending point up to two bends for connecting two points in the embodiment.

FIG. 8 is an explanatory diagram illustrating automatic search and connection of a connection line in the embodiment.

FIG. 9 is an explanatory diagram illustrating automatic search and connection of a connection line in the embodiment.

FIG. 10 is an explanatory diagram illustrating automatic search and connection of a connection line in the embodiment.

FIG. 11 is an explanatory diagram for explaining automatic assignment of signal line names.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control device 2 Input device 3 Output device 5, 6, ... N Database file DB1 Circuit design database DB2 Board design database

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06F 17/50

Claims (2)

(57) [Claims] 1. A and circuit design data composed of a plurality of circuit diagram data, compared with the substrate design data modification is applied after being designed on the basis of the circuit design data, the modifications from the mismatch of both data Search the required circuit drawing data and make sure that it matches the corrected board design data.
With modification data of the retrieved circuit diagram, its Osamu
An automatic correction method of a circuit drawing, which consists of registering a correct result . 2. It has at least two circuit components.
In the circuit diagram, the circuit design data comprising data of a plurality of the circuit diagram, comparing the substrate design data modification is applied after being designed on the basis of the circuit design data, the modifications from the mismatch of both data searching data <br/> other circuit figures required, a line segment searching obstacle existing between circuit components in the data of the retrieved circuit drawings, for connecting the respective circuit components, the Correction to the data of the searched circuit diagram by forming and creating a bending point up to two bends to avoid obstacles
And automatically registering the correction result .