JPH02238574A - Logic diagram input device - Google Patents

Abstract

PURPOSE:To shorten a setting period by wiring output pins and input pins of elements directly without considering the angle of wiring, then generating only horizontally or vertical wiring automatically. CONSTITUTION:The output pins 2a - 2l and input pins 3a - 3p are wired 4 optionally. Then one output pin 2a and the corresponding input pin 3a are selected, horizontal wiring is performed as closely to the input pin 3a as possible within a range wherein wiring from the output pin 2a is possible, and then vertical wiring is carried out to obtain Manhattan wiring between the output pin 2a and input pin 3a. Similarly, other output pins 2b - 2l and the corresponding input pins 3a - 3p are extracted and Manhattan wiring is generated automatically as well. Consequently, the Manhattan wiring can be generated automatically, so input operation is speeded up and the design period is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a logic diagram input device, and particularly to its wiring.

[Conventional technology]

Figure 3 shows, for example, wiring only in the horizontal or vertical direction (hereinafter referred to as Manhattan wiring) using a conventional logic diagram input device.
In the diagram, (la) to (1d) are called symbols below the element figure C), (2a) to (2t!)
are output pins, (3a) to (3p) are input pins, (5) is Manhattan wiring, and (6a) to (6W) are points of change in wiring direction.

Next, the operation will be explained. The output pins (2a) to (2l!) and input pins (3a) to (2l!) in the conventional logic diagram input device
For Manhattan wiring with 3p), when changing the wiring direction from horizontal to vertical or from vertical to horizontal, the wiring direction is changed by manually specifying the change points (6a) to (6W). was.

[Problem to be solved by the invention]

Conventional logic diagram input devices were configured as described above, so when doing Manhattan wiring, it was necessary to specify the point each time the wiring direction was changed, which caused the problem that input took time. .

This invention was made to solve the above-mentioned problems, and an object thereof is to obtain a logic diagram input device that can shorten the design period.

[Means to solve the problem]

The logic diagram input device according to the present invention automatically generates Manhattan wiring after arbitrary wiring is performed by changing the wiring angle between input pins and output pins.

[Effect]

Manhattan wiring in this invention is automatically generated.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (la) to (1d) are symbols, (2a
) to (27?) are output pins, (3a) to (3p) are input pins, (4) is arbitrary wiring, and (5) is Manhattan wiring.

FIG. 2 is a flowchart of FIG. 1.

Next, the operation will be explained. First, the output pins (2a) to (2l) and input pins (3a) to (3p) shown in Figure 1
Perform arbitrary wiring (4). Next, a certain output pin (2a)
and its corresponding input pin (3a), and connect the maximum input pin (3a) within the range that can be wired from the output pin (2a).
), and then vertical wiring to obtain Manhattan wiring between the output pin (2a) and the input pin (3a).

Thereafter, corresponding input pins (3a) to (3p) are sequentially drawn for other output pins (2C) to (2e), and Manhattan wiring is automatically generated in the same way.

〔Effect of the invention〕

As described above, according to the present invention, since the Manhattan wiring is configured to be automatically generated, input work can be done quickly and the design period can be shortened.

[Brief explanation of drawings]

Fig. 1 is a logic diagram in which Manhattan wiring is generated up to a certain step according to an embodiment of the present invention, Fig. 2 is a flowchart of Fig. 1, and Fig. 3 is a logic diagram in which Manhattan wiring is generated using a conventional logic diagram input device. be. In the figure, (la) to (ld) are symbols, (2a
) to (2e) are output pins, (3a) to (3p) are input pins, (4) is arbitrary wiring, (5) is Manhattan wiring, (
6a) to (6W) are points of change in the wiring direction. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] When wiring between element figures in a logic diagram input device, after directly wiring the output pin and input pin of the element regardless of the wiring angle, automatically generate wiring only in the horizontal or vertical direction. A logic diagram input device characterized by.