JP2879259B2 - Interactive data correction device in CAD system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an interactive data correction device in a CAD system.

[Conventional technology]

In the design of printed wiring boards using CAD systems, for example, verification after wiring, that is, design rule check (Desi
gn Rule Check) (checking whether wiring satisfies design conditions: gap check, connection check, etc.) corrects an erroneous pattern, that is, an error pattern. I was doing.

The pattern data resulting in an error as a result of the verification, that is, the error data, is highlighted on the display screen by the error identification function of the apparatus. To correct the error pattern, the designer visually searches for and corrects the highlighted error data. It has become.

Therefore, in order to search for an error pattern to be corrected, that is, an error location, an error list listing error data is output as a result of verification instead of highlighting. This list describes signal names, coordinate names, layer names, and the like of the error patterns.

The designer refers to this list, selects error data, and displays an error pattern. And FIG. 2 (a)
As shown in FIG. 2, by specifying the coordinates (x, y) of two diagonal points (lower left and upper right), the area considered to contain the error pattern is enlarged and displayed as shown in FIG. 2 (b). By repeating enlargement, reduction, movement, and the like on the enlarged area, an error pattern to be corrected is found. When the error pattern is displayed in a size that can be easily corrected, the correction of the error pattern is started.

 The above is repeated for all areas on the error list.

The above operation is shown in a simple flowchart as shown in FIG.

After the wiring is verified (step 102), it is checked whether or not there is an error (step 103). If there is no error, the process ends. If there is an error, an error list is output (step 102).
104), search for a correction from the error list (step 105), display the correction (step 106), correct the error pattern (step 107), correct the error data (step 108), Finally, it is checked whether or not the correction has been completed (step 109), and the above operation is repeated until the correction is completed.

[Problems to be solved by the invention]

However, in the above-described conventional interactive pattern correction device, it is necessary to repeat operations such as enlargement, reduction, and movement to display a corrected portion before correcting the error data. There was a problem that it takes a lot of time before.

The present invention has been made in view of the above points, and eliminates the problem that it takes time to correct design data as in the above-described conventional printed wiring board design, and can correct error data quickly and easily. An object of the present invention is to provide an interactive data correction device.

[Means for solving the problem]

In order to solve the above problems, the present invention has an interactive data correcting apparatus in a CAD system configured as follows.

Means for displaying a list of error data obtained by verifying the pattern data under predetermined conditions, and automatically enlarging and displaying an area including the error data selected from the displayed list as an error pattern Means for performing the operation.

[Action]

According to the present invention, by displaying a list of error data obtained by verifying design data, when a desired error data is selected from the list, an area including the selected error data is automatically displayed on the screen as an error pattern. Because it is enlarged and displayed, conventional CA for designing printed wiring boards, for example
As in the case of the D system, repeated operations such as enlargement, reduction, and movement are not required to display the corrected portion before correcting the error data, and the problem that much time is required to complete the data correction can be solved.

〔Example〕

Hereinafter, a CAD for designing a printed wiring board according to an embodiment of the present invention will be described.
The system will be described as an example.

FIG. 1 is a block diagram showing the configuration of an interactive pattern correction apparatus according to one embodiment of the present invention. As shown, the interactive pattern correction apparatus includes a mouse 1 for inputting coordinates and various commands, a processing device 2, a display device 3, and an external device 4.

The processing device 2 includes a data input unit 21, a pattern data storage unit
22, a verification unit 23 that verifies that the wiring result satisfies the wiring conditions, an error data identification unit 24 that identifies data that has resulted in an error as a result of the verification, and error data that displays the error data in a list for each type of error. List table display section 25, enlargement condition storage section 26 for storing conditions for enlarging an error pattern selected and displayed from error data list, diagonal for enlarging error pattern selected and displayed from error data list Enlarged two-point determination unit 27 that determines the coordinates of two points,
The display unit 28 includes a display unit 28 that outputs and displays pattern data and error data on the printed wiring board to the display device 3 and a data output unit 29 that outputs pattern data of the printed wiring board to the external device 4.

Next, an outline of the operation of this embodiment will be described. The result of the wiring performed by the designer is stored in the pattern data storage unit 22. The verification unit 23 verifies whether or not the data satisfies the wiring conditions. The error data identification unit 24 adds error information to the pattern data stored in the pattern data storage unit 22 for the data that resulted in an error as a result of this verification. The error data list display section 25 stores the pattern data having the error information in the pattern data storage section 22.
Further, the search is performed and displayed as a list on the screen of the display device 3 via the display unit 28. When the designer selects one piece of error data from the list, the enlargement condition storage unit 26 is referred to, and the coordinates of two diagonal points to be passed to the display unit 28 are determined by the enlargement two point determination unit 27. When no error data is displayed in the error data list, the correction of the error pattern is completed, and the error pattern is output to the external device 4 via the data output unit 29.

Next, details of the operations of the error data list display unit 25 and the enlarged two-point determination unit 27 will be described.

The error data list display section 25 extracts signal names, coordinates, layer names, types of errors, and the like only for data having the error information from the pattern data storage section 22, and the extracted data is shown in FIG. It is displayed on the screen of the display device 3 as a list. This display can be moved up and down (scroll).

FIG. 4 (a) is a list of gap errors in the pattern, and FIG. 4 (b) is a list of non-wiring of the pattern. By designating a desired one of the error data in the list with the mouse 1, a region including the error data is automatically enlarged and displayed as an error pattern.

5 and 6 are diagrams for explaining an example of automatic determination of diagonal points for enlarged display. FIG. 5 shows an example of a gap error, and FIG. 6 shows an example of an unwired state.

FIG. 5A shows a case where the gap between the line 201 and the component pin 202 is small, and as a result of the verification, a gap error is determined. In this case, error data is selected from the list as shown in FIG. 4A by the mouse 1, and a region including the error data is displayed on the screen of the display device 3 as an error pattern.

Next, in FIG. 5B, the enlarged two-point determination unit 27 determines the end point coordinates P (x ₁ , y ₁ ), P
(X _2, y _2), obtaining the minimum coordinates Pmin1 and maximum coordinates Pmax1 of P (x _3, y ₃₎ and P (x _4, y ₄₎ from the line 201. That is, Pmin1
(X _4, y _1), the _{Pmax1 (x 2, y 3)} . Similarly, the center coordinates P (xc, yc) and one half of the length x _r, minimum coordinate Pmin2 and maximum coordinates of the part pins from y _r of each side of the part 202 seen as a square shape
Find Pmax2. That is, Pmin2 (xc-xr, yc-yr), Pmin2
(Xc + xr, yc + yr).

Next, in (c) of FIG. 5, the smaller one of the minimum coordinates Pmin1 and Pmin2 obtained in (b) is set as Pmin (x ₄ , y ₁ ), and the maximum coordinate Pmax1 obtained in (b) is also used. the whichever larger Pmax2 and _{Pmax (x 2, y 3)} .

Next, in (d) of FIG. 5, the correction values (Δx, Δy) stored in the enlargement condition storage unit 26 are added to or subtracted from the minimum coordinate Pmin and the maximum coordinate pmax determined in (c), and are enlarged and displayed. Diagonal two points PMIN and PMAX are obtained. That is, PMIN (x ₄ −
Δx, y ₁ −Δy) and PMAX (x ₂ + Δx, y ₃ + Δy). The coordinates PMIN, PMAX are passed to the display unit 28, and the two diagonal points PMAX, PMAX,
An area including the error data is displayed as an error pattern on the screen of the display device 3 with PMIN as the minimum and maximum coordinates, and the operator corrects the gap error.

FIG. 6 (a) shows a case where it is determined that an unwired error has occurred as a result of verification because the line 203 and the component pin 204 are not connected. This is one in which a selection is made with the mouse 1 from a list as shown in FIG. 4 (b), and an area including the error data is displayed on the screen of the display device 3.

First, in FIG. 6B, the end point P of the line 203 is set.
A minimum coordinate Pmin and a maximum coordinate Pmax are obtained from (x ₁ , y ₁ ) and the center point P (xc, yc) of the component pin 204. That is, Pmin
(X ₁ , yc) and Pmax (xc, y ₁ ).

Next, in FIG. 6C, the enlargement condition storage unit 26 stores the minimum coordinate Pmin and the maximum coordinate Pmax determined in FIG.
To obtain two diagonal points PMIN and PMAX for adding and subtracting the correction values (Δx, Δy) stored in. That is, PMIN (x
_{1 -Δx,} y _{c -Δy),} the _{PMAX (x c + Δx, y} 1 + Δy).
The coordinates PMIN, PMAX are passed to the display unit 28, and the two diagonal points PMI
An area including the error data is displayed on the screen of the display device 3 with N and PMAX as the minimum and maximum coordinates, and the operator corrects the non-wiring error.

〔The invention's effect〕

As described above, according to the present invention, a printed wiring board CAD
Means for displaying a list of error data obtained by verification after the wiring board on the interactive pattern correction device in the system, and automatically expanding an area including the error data selected from the displayed list as an error pattern. Since the display means is provided, the following excellent effects can be obtained.

(1) A search for a corrected portion can be performed immediately, and a reduction in pattern correction time can be expected.

(2) Also, since the error data is displayed in a list, the error data decreases as the correction of the error data progresses. When the error data is no longer displayed in the list, the correction is completed, and the correction omission can be prevented. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an interactive pattern correction device according to the present invention, FIGS. 2 (a) and 2 (b) are diagrams for explaining an enlarged display example of a conventional printed wiring board, and FIG. 4 (a) and 4 (b) are flowcharts showing a conventional correction work procedure.
FIG. 5 is a diagram showing an example of a list of gap errors and an example of a list of unwired errors. FIGS. 5 and 6 are diagrams for explaining an example of automatic determination of diagonal points for enlarged display. In the figure, 1 ... mouse, 2 ... processing device, 3 ... display device, 4 ... external device, 21 ... data input unit, 22 ... pattern data storage unit, 23 ... verification unit, 24 ... Error data identification part, 25 ... Error data list display part, 26 ... Enlargement condition storage part, 27 ... Enlargement two-point determination part, 28 ... Display part, 29
... Data output unit.

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

Claims (1)

(57) [Claims] An interactive data correction apparatus in a CAD system for verifying design data obtained by using a CAD system under predetermined conditions to detect error data and correcting the error data. CAD characterized by comprising means for displaying a list of error data obtained by verification as a list, and means for automatically enlarging and displaying an area including error data selected from the displayed list as an error pattern. An interactive data correction device in a system.