JPH01232475A - Parallel line connecting method - Google Patents

Abstract

PURPOSE:To perform the parallel connection of groups by obtaining a cross reference line from the lead-out direction of a key end point and the coordinate value and performing the connection between each key end point and the cross reference line with biases secured respectively and with the twist relation taken into consideration to the cross reference line. CONSTITUTION:The conceptional key end points are obtained for the groups which are led out of each hit end point and connected in parallel with each other. Then a cross reference line is obtained from the lead-out directions of the key end points and the coordinate value and each key end point is connected to the cross reference line with the biases secured respectively and the twist relation taken into consideration to the cross reference line. Thus the parallel routes are led to the cross reference line from each key end point with biases secured and connected to each other via said reference line. As a result, the groups can be connected in parallel with high efficiency.

Description

[Detailed Description of the Invention] [Summary] Regarding the parallel line connection method in a CAD device used when designing pattern wiring for digital circuit boards, ICs, etc., only the end points of each symbol for group connection are specified. The purpose is to provide a method for efficiently connecting groups in parallel, and to provide an input means for inputting information necessary for parallel wiring into a computer, and a li! that is connected to this computer to input various information. In a CAD device equipped with a graphic display displayed on the j-plane, a conceptual representative end point of a group to be connected in parallel is drawn from each hit end point, and a cross reference is determined from the drawing direction and coordinate values of the representative end point. The configuration is such that lines are found, and connections are made while maintaining a bias from each representative end point while considering the torsional relationship with respect to the crossing reference line to perform group parallel connections.

[Industrial Application Field] The present invention is applicable to CAD equipment used for designing printed circuit boards for digital circuits, pattern wiring for ICs, etc.
This article relates to a method for connecting parallel wires.

[Conventional technology] FIG. 6 is an explanatory diagram of a conventional parallel wire connection method.

Here, it is assumed that there are three rC, A, B, and C, and the terminals A1 to A4.81 to B4.01 to A4 between them are grouped and connected by parallel lines.

When performing such group connection, according to the conventional method, the line segment n1l-n12゜n13 is
- n 14- n 15. n21-n22.
Each point was hit in sequence like n23-n24-n°25 to connect the lines.

[Problems to be Solved by the Invention] According to the conventional method, since it is necessary to perform hits for each end point, as the number of parallel lines to be connected increases, the number of hits increases accordingly. , there is a problem that work efficiency does not improve.

The present invention has been made in view of these points, and
It is an object of the present invention to provide a method for efficiently connecting groups in parallel in a logic circuit diagram with a length of δ1 by specifying only the end points of each symbol for group connections.

[Means for solving the wJ problem] FIG. 1 is a flowchart showing the principle of the present invention. The group parallel connection method of the present invention first determines the conceptual representative end point of the parallel connection group drawn from each hit end point (step (1)), and then the drawing direction and coordinates of the representative end point. The intersecting reference line is determined from the values (step (2)), and connections are made while giving a bias from each representative end point and taking into account the torsional relationship with respect to the intersecting reference line (step (2)).

[Operation] From each end point, parallel paths are drawn toward the intersection reference line with each bias, and the parallel lines drawn from each end point are connected at the intersection reference line to perform a group parallel connection. Thereby, the groups can be efficiently connected in parallel.

[Example] Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 2 is a system configuration diagram for implementing the method of the present invention. In the figure, 1 is a computer (CPU), 2
3 is a storage device, and 3 is a graphic display, for example, a CRT. 4 is a keyboard for inputting various data, and 5 is a tablet for specifying a desired position of a figure displayed on the graphic display 3; for example, a light ben or a mouse is used. 6 is a plotter,
7 is a bus connecting each part.

FIG. 3 is a diagram for explaining the present invention in detail, and is a conceptual diagram of a diagram displayed on the graphic display 3 and parallel lines to be connected. Here, the case where each terminal A1-A4 of IC11 and each terminal 81-B4 of IC12 are connected is illustrated.

First, in (a), the endpoints A1 to A to be hit are
Conceptual representative end points of 4,81-B4 (points a and b in the figure)
seek. Representative end point a of each end point.

Once b is obtained, next, the cross reference MA'l as shown in (b) is determined from the drawing direction of the representative end point (to the right for the 8 hit points, to the left for point b) and its coordinate values. demand. This crossing reference line I! 1 generally becomes a line extending in the y-axis direction when the end point is drawn out to the right or left, and becomes a line extending in the x-axis direction when the end point is drawn out in the upward or downward direction.

Next, as shown in (c), a predetermined bias BS is applied from each representative end point a, b, and connection is made to the cross base 110 It t. (d) shows the result of connecting each representative end point to the crossing reference line 11. Subsequently, each ICl1. IC12
Each end point A1. A2. ..., B1, B2. . . . and expand the connections to each representative end point a, b, find the route as shown in (e), and connect each end point △1-81 of IC11°
．． A2-82. Connect Δ3-83 and A4-84.

The above is a case in which 2-) (7) IC11, 1C12fffl are connected with parallel lines without curves, but as shown in FIG. 4, three IC11, fc12. The case where the ICl3 is connected by parallel lines with twist as shown in the figure will be described below with reference to FIG.

First, in Fig. 4, each IC11, 1CI2, rc
Find 13 representative end points. When the coordinates of each end point (for example, A1-A4) are arranged in the same -X coordinate, this representative end point is a coordinate position expressed by (X coordinate value, (maximum y coordinate value + fan small y coordinate value)/2). If the coordinates of each end point are aligned with the same -y coordinate, the coordinate position is expressed as ((maximum X coordinate value - minimum x coordinate value)/2.X coordinate value). In this way, the representative end points a, b, and c of each IC element are determined from the coordinates of each end point.

Next, as shown in FIG. 5(a), the intersection reference line is determined from the extraction directions (indicated by arrows) and coordinate values of each representative end point a, b, and c. Find 1. When there are many vectors in the X direction, the intersecting rhombus line becomes a reference line extending in the y-axis direction, and when there are many vectors in the y-direction, it becomes a reference line extending in the X-axis direction. In this example, since there are many X directions, the intersection reference line /1 extends in the V-axis direction as shown, and the positions shown are determined from the coordinates of each representative end point.

Next, from each representative end point a, b, and c, the intersection assorative 1!
Connect to /l. This connection is performed by providing a bias that pulls the n line segments. Furthermore, the arrangement of each representative point is determined in association with the net ID. That is, the end point Al-81-C
The connection arrangement of 1 is net id 1°, and the end points A2-B2-C2 are net id 2. Set endpoints A3-B5-C5 to net id3
, end point A4-84-C4 is set as net id4. FIG. 5(b) shows the relationship between the arrangement of representative end points a, b, and c and the net ID.

FIG. 5(c) shows the connection results from the representative end point a to the intersection reference line l. Also, Figure 5 (d).

(E) is a diagram for explaining matters to be considered when connecting the representative end point to the crossing reference line 41. In the figure, the intersections a1 connected from the representative end point a to the intersection reference line /1 are arranged in a downward direction from top to bottom and exist in region 1. On the other hand, if you connect a line from the representative end point to the intersection reference line /l, the arrangement will be from top to bottom, and as shown in Figure 5 (e), it will intersect the line segment from the end point that should not be connected. A problem will occur. Therefore, the connection from the representative end point A to the crossing reference line It is performed as shown in FIG.

Similarly, the connection from the representative end point C to the crossing reference line 111 is made in consideration of twisting, as shown in FIG. 5 (G).

Next, the route connected from each representative end point a, b, c to the intersection reference line It is developed as shown in Figure 5 (H), and then, as shown in Figure 5 (S), the route connected to the intersection reference line It is expanded. From right to left, the lines are net idl, net id2. net id3,
Expand to connect net id4. And Figure 5 (
As shown in FIG. 5), by sequentially grouping the routes for each net ID for each net i61 to id4, the group parallel connection as shown in FIG. 5 is finally completed.

[Effects of the Invention] As explained in detail above, the present invention is characterized in that it obtains a conceptually representative end point and utilizes the intersecting reference line, and the method for developing the intersecting reference line is fixed. By doing so, it is possible to provide a parallel wire connection method that can efficiently connect groups in parallel.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the principle of the present invention, FIG. 2 is a system configuration diagram for realizing the method of the present invention, FIG. 3 is a diagram for explaining an embodiment of the method of the present invention, and FIG. 5 and 5 are diagrams for explaining another embodiment of the method of the present invention, and FIG. 6 is a diagram for explaining the conventional parallel wire connection method. In FIG. 2, 1 is a CPU, 2 is a storage device, 3 is a graphic display, 4 is a keyboard, 5 is a tablet, 6 is a plotter, and 7 is a bus. Patent applicant: Fujitsu Limited
Company 1, Flowchart illustrating the principle of the present invention (1) Enclosure of the present invention ■ A system for realizing the method (Figure 2) Figure 4

Claims (1)

[Scope of Claims] A CAD device equipped with input means for inputting information necessary for connecting parallel lines into a computer, and a graphic display connected to the computer and displaying various information on a screen, each end point being hit. Find the conceptual representative end points of the group to be connected in parallel drawn from the group (step (1)), find the intersecting reference line from the drawing direction and coordinate values of the representative end points (step (2)), and from each representative end point A parallel line connection method in which connections are made while giving consideration to a torsional relationship with respect to the crossing reference line while providing a bias (step (3)), and group parallel connections are performed.