JPH0328968A - Production of circuit diagram - Google Patents

Abstract

PURPOSE:To produce a circuit diagram for only a corrected part of an electronic circuit and to easily confirm the corrected part of the circuit by erasing selectively the patterns based on the graphic attribute after production of the corrected circuit diagram data. CONSTITUTION:A graphic attribute addition circuit diagram which is added with '1' as a graphic attribute called property is produced for all data on the original drawing of a circuit diagram. For instance, a property, i.e., ABC is added to a symbol A and the value OLD is defined to the property. This defined value can be selected by a command 'Select property ABC.' for example. Furthermore the data are selected with use of the graphic attribute '1' in a corrected circuit diagram where the circuit data is corrected. Then a linear signal line set between the selected symbol and the selected one of two points is erased. Thus the graphic data on a circuit diagram of a corrected part only is obtained. As a result, only the corrected part can be extracted out of the data on the corrected circuit diagram as the original drawing data on the circuit diagram. Then the corrected part of a circuit of a large scale can be easily controlled.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is a computer aided design (hereinafter referred to as CAD) system that classifies electronic circuit diagrams into symbols, signal lines, etc. and registers them in a computer for use. The present invention relates to a circuit diagram creation method for creating a corrected electronic circuit diagram using .

[Conventional technology]

Conventionally, electronic circuit diagrams have been created by handwriting using paper and pencil. When electronic circuit diagrams were created by hand, the creation of netlists (electronic element connection information) for circuit verification also had to be manually coded.

In recent years, a computer-based design method called CAD has been adopted, and CAD has come to be used in a variety of areas, including manual labor for circuit diagrams, circuit diagram verification, and logic verification, even in the field of electronic circuit design. . In particular, circuit diagram input and netlist generation are prone to errors, so CAD has been widely used. By converting circuit diagram input to CAD, it has become easier to output a corrected circuit diagram netlist.

[Problem to be solved by the invention]

However, although it is easy to make corrections when manually converting electronic circuit diagrams to CAD, it is not possible to change the color of the corrected parts as with handwritten drawings, and because corrections are made on a CRT screen, old data may be revised. The data becomes new on the spot, and no revision history remains. For this reason, when applied to large-scale circuits, a problem arose in that it was difficult to tell which part had been modified. In particular, if the designer and the person inputting the circuit diagram are different, the designer should confirm the corrections. Another major problem is the wasteful work that occurs when circuit diagrams are drawn up by people working on them separately.

SUMMARY OF THE INVENTION An object of the present invention is to provide a circuit diagram editing method that facilitates confirmation of circuit correction parts by creating a circuit diagram of only the correction parts of an electronic circuit.

[Means to solve the problem]

In the circuit diagram creation method according to the present invention, when the circuit diagram original data is registered in a computer-aided design system using a circuit diagram manual system by attaching figure attributes to each data, and when the circuit diagram original data is corrected, After deleting the shape data along with the shape attributes, making additional corrections to the deleted circuit data and creating a modified circuit diagram, select only the unmodified shapes using the modified circuit data using the shape attributes, and then It is also possible to create a circuit diagram of only the modified portion by deleting it from the modified circuit diagram data.

[Effect]

In this invention, after creating modified circuit diagram data,
If you select and delete a figure using the figure attribute, you will get a circuit diagram of only the modified part.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a flowchart of processing in an embodiment of this invention. Note that (1) to (a) indicate each step. Hereinafter, FIG. 1 will be explained with reference to FIGS. 2 to 6.

Figure 2 is the original circuit diagram. In this figure, X1 is a NOR gate, A and B are input signal terminals, and OUT is an output signal terminal. This circuit diagram original data is input into the CAD system (1).

FIG. 3 is a modified circuit diagram in which an inverter game X2 is added to the signal terminal B and the signal line N1 is edited.

Figure 4 shows all the data of the original circuit diagram in Figure 1, that is, figure attributes called properties for figures such as symbols.
1" is added. (2). A name and value can be defined for the blobati. For example, add a blobati of ABC to symbol A and define a value of OLD to it. It is possible to select, for example, by a command "select ABC".

Figure 5 is a modified circuit diagram obtained by modifying the circuit data in Figure 4 (3).The data of the modified circuit diagram in Figure 5 is selected using the figure attribute "1" (4), and then When you erase the straight signal line between the selected symbol and two selected points (5
)． (6), Figure data of the circuit diagram can be obtained only for the modified part in Fig. 6 (7). The circuit diagram in FIG. 6 consists only of the modified parts. Normally, there will be multiple corrections, but
Plot each figure on translucent paper such as tracing paper,
Check by overlapping. (Effects of the Invention) As explained above, the present invention registers circuit diagram original data in a computer-aided design system using a circuit diagram input system by attaching figure attributes to each data, and When modifying data, delete the figure data along with the figure attributes, make additional corrections to the deleted circuit data, create a corrected circuit diagram, and then use the figure attributes to select only the unmodified figures. Then, the selected figure is deleted from the modified circuit diagram data and a circuit diagram with only the modified part is created, so only the modified part can be extracted from the original circuit diagram data and the modified circuit diagram data. This has the advantage that correction points can be easily filled in in large-scale circuits.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a flowchart of a process showing an embodiment of the present invention;
The figure is the original circuit diagram, Figure 3 is the modified circuit diagram, Figure 4 is the second diagram.
Figure 5 is a modified circuit diagram, and Figure 6 is a circuit diagram of only the modified part. be. In the figure, A, B, and OUT are signal terminals, N1 is a signal line, X1 is a NOR gate, and X2 is an inverter gate. Figure 2 Figure 1 Figure 4 Figure 5

Claims (1)

[Claims] When registering circuit diagram original data in a computer-aided design system using a circuit diagram input system by attaching figure attributes to each data, and modifying the data of the circuit diagram original, the figure data is added together with the figure attributes. After deleting and making additional corrections to the deleted circuit data to create a modified circuit diagram, select only the unmodified shapes using the shape attributes of the modified circuit diagram data, and delete the selected shapes from the modified circuit diagram data. A method for creating a circuit diagram, characterized in that the circuit diagram is created only for the modified part.