JPH0944530A - Circuit diagram generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an artificial miss by automating a change from a temporary symbol to a regular symbol. SOLUTION: This system is provided with an outline design process (S10) for designing the outline of a device, a function design function (S11) for generating a function diagram by analyzing the functions of the outline design, a symbol editor (S12) which generates respective designed functions and circuit diagram symbols of the respective functions, a function diagram generating process (S13) for generating a function diagram by using a circuit diagram generation tool and a symbol library, a circuit diagram editing process (S14) which displays the function diagram on a display and corrects and edits it, a hierarchical design process (S15) which divides and makes the circuit diagram hierarchical, a correspondence table generating process (S19 and S20) which take the names of temporary symbols out of the hierarchical circuit diagram and displays them on the display, and generates a correspondence table of the temporary symbols and regular symbols once the regular symbols are determined, and an automatic symbol changing process (S21) which generates a final drawing by automatically changing the temporary symbols into the regular symbols.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit drawing preparation system, and more particularly to a circuit drawing preparation system utilizing CAD.

[0002]

2. Description of the Related Art A conventional circuit drawing creating system of this kind composes each circuit drawing created by using a CAD system into a drawing sheet, and the data of each drawing sheet is stored in a CAD drawing database. If the drawing sheet is changed, the change data is input by a predetermined method to update the CAD drawing data.

For example, if the symbol of a drawing element in a drawing sheet is changed, the change flag of the related drawing parameter of the corresponding graphic element in the related drawing parameter table specific to the symbol name before the change is written in the changed state. At the same time, the related drawing parameters of the corresponding graphic element are added to the related drawing parameter table specific to the changed symbol name. At this time, the change flag is set to the addition instruction state. Then, by referring to the related drawing parameter table unique to the changed symbol name, it is possible to detect a drawing sheet having the same symbol name as the changed symbol name but a different sheet number, that is, a related drawing sheet, For example, it becomes possible to display the message of the sheet number of the related drawing sheet and further display the related drawing sheet on the screen to notify the user (see Japanese Patent Laid-Open No. 4-225473).

[0004]

In this conventional circuit drawing creation system, when a drawing element is changed, if the drawing element is symbolized, when the changed drawing sheet is loaded by the schematic drawing editor, the symbol library data is loaded. It is possible to read out the changed symbol from and change it with the official symbol on the drawing sheet. However, if the temporary symbol (macro) is designed at the stage of hierarchical design, that part will be changed when the official symbol is decided. There was a problem that the circuit diagram had to be created manually.

[0005]

A circuit drawing creating system of the present invention includes a symbol storing means for storing a plurality of symbols representing a predetermined function used for creating a circuit diagram, and a display screen using the plurality of symbols. A circuit diagram creating means for creating a circuit diagram on the above, a first circuit diagram editing means for editing the circuit diagram by moving, adding and deleting symbols on the display surface, and at the time of hierarchical design of the circuit. First registration means for tentatively determining a symbol of an undecided circuit portion as a tentative symbol and registering the tentative symbol in the symbol storage means, and a circuit diagram including the tentative symbol when the tentative symbol is registered. And a second circuit diagram editing means for editing, and when a formal symbol is determined for the temporary symbol, a correspondence table of the input / output symbol of the temporary symbol and the input / output symbol of the formal symbol is created. Memory means for storing, second registration means for registering the formal symbol in the symbol storage means, the correspondence table stored, and the circuit diagram including the formal symbol when the formal symbol is registered And a third circuit diagram editing means for editing.

[0006]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the configuration of a system to which an embodiment of the present invention is applied.

In FIG. 1, the system of this application example is C
A CAD that stores circuit diagram data created by AD
A drawing database 10, a symbol library database 11 in which symbols for creating a circuit drawing by CAD are registered, a table in which the names of temporary symbols and formal symbols, input / output pin names, and the like are associated with each other is stored. A correspondence table storage unit 12, a circuit creation editor unit 13 that stores a circuit diagram creation program by symbols, a drawing change processing storage unit 14 that converts a temporary symbol into a formal symbol and stores a drawing change processing program, and a circuit. It has a display 15 for displaying drawings, a keyboard 16 for inputting characters, symbols, etc., a mouse 17 for pointing on the screen of the display 15, and a CPU 18 for controlling and processing the entire system of this application example. .

FIG. 2 is a flow chart showing a procedure for making a circuit diagram according to an embodiment of the present invention, FIG. 3 is a flow chart showing a working procedure of the temporary symbol formal symbol automatic changing mechanism shown in FIG. 2, and FIG. An example of a circuit diagram from a schematic design to a circuit design including undecided symbols in the embodiment is shown, (a) shows a schematic design, (b) shows a functional design for the schematic design of (a), (C) is a diagram showing a circuit diagram including undecided symbols for the functional design of (b), FIG. 5 shows an example in which the undecided symbols of (c) of FIG. 4 are replaced with temporary symbols, and (a) Is a diagram showing an example of a temporary symbol, (b) is an undecided symbol of (c) of FIG.
FIG. 6 is a diagram showing a circuit diagram in which the temporary symbol of FIG.
5B shows an example in which the temporary symbol is replaced with a formal symbol, FIG. 5A is a diagram showing a formal symbol corresponding to FIG. 5A, and FIG. FIG. 7 is a diagram showing the correspondence, and FIG. 7 is a diagram showing a circuit diagram in which all of FIG.

Next, a circuit diagram creating system according to this embodiment will be described with reference to FIGS.

In FIG. 2, in S10, an outline of an apparatus for creating a circuit drawing is designed. For example, as shown in FIG. 4A, the general function of the device to be created is designed. In FIG. 4A, for example, the A function has a size of 30 × 40 with 200 pins for input / output, and the B function is loaded with data and initialized when the power is turned on. The designer considers the functions of the outline. Next, in S11, S1
A functional diagram is created by dividing the outline function performed in 0.

In creating a functional diagram, functional symbols (AND,
OR, CNT, etc.)
Using the functional diagram creation editor S11 for the layout and wiring above, for example, FIG. 4B is created with respect to FIG. S
Reference numeral 12 is a symbol editor for creating the shape of the circuit diagram symbol when the function symbol used in S11 is converted into the circuit symbol (LS04, ALS244).

To create a schematic, everything must be a schematic symbol and the technology (eg,
It is necessary to separately create a circuit diagram symbol for each cmos4, cmos6), but since there is a symbol library database 11, most databases can be created without using this database 11.

In S13, a circuit diagram creation tool is used to execute S11.
A circuit diagram is generated using a tool for automatically generating a circuit diagram from the function diagram (b in FIG. 4) written with the function symbol of FIG. 4 and the symbol library database 11. The generated circuit diagram is shown in FIG.

In S14, the operator can change the circuit diagram generated in S13 on the display 15. In S14, since the symbols can be arranged and the wiring can be made, the correction and the hierarchy can be achieved on the circuit diagram ((b) of FIG. 5).

When the hierarchical design of S15 is performed, it is possible to cut out a complicated function and to postpone only that part to proceed with the design. By arranging the postponed part with the temporary symbols, the other parts are not affected and the design can proceed ((c) of FIG. 5). However, since it remains a temporary symbol,
It cannot be output as a formal circuit diagram.

Then, in S19, the name of the temporary symbol is extracted from the circuit diagram (for example, FIG. 5B) hierarchically designed by the correspondence table creating program, and "CMA" of FIG. 5B is obtained.
The temporary symbol name "C" and the drawing sheet used are displayed on the display 15 to inform the operator. The operator inputs the formal symbol name if the formal symbol is created from this information. If the formal symbol “CSYM” of FIG. 6A has not been created, enter the line feed key.

In the correspondence table creating program of S19, when the symbol name is input, the symbol library database 11 is searched and the official symbol is displayed on the display 15.

Next, the correspondence table creation program (S19) is
Since you will be asked for pin information, enter the pin name corresponding to the official symbol. For example, in FIG. 6B, the operator inputs the temporary symbol “IN1” corresponding to the displayed information such as the official symbol “A01” in FIG. 6A. If there is no corresponding pin, enter the line feed key. (As a result, it becomes an empty pin.) When the corresponding input / output information is input for all the temporary symbols in (b) of FIG. 5, a correspondence table is created (S20),
It is stored in the correspondence table storage unit 12. The content of the correspondence table is, for example, a text file as shown in FIG.

Next, S21 is a temporary symbol formal symbol automatic changing mechanism, and FIG. 3 is a subdivision of S21 of FIG.

In FIG. 3, the operator first inputs the circuit diagram drawing name and the correspondence table in the drawing database 10 (S).
30). The drawing name is extracted from the input data (S3
4). The input correspondence table is read from the correspondence table storage unit 12 (S35). Drawing database 1
Read from 0 (S36).

The temporary symbol name is taken out from the read correspondence table and the drawing sheet is searched (S37).

The official symbol name for the temporary symbol written in the correspondence table is taken out from the symbol library database 11 and placed in the drawing (S38). After placing the official symbols on the drawing sheet, wire between the symbols (S
39). The drawing sheet is updated (S40). Repeat until the data of the correspondence table is read to the end (S41). Generate a circuit diagram that is placed and wired with a formal symbol. FIG. 7 is a generated circuit diagram.

Since only the symbols written in the correspondence table are changed, other temporary symbols having no correspondence table remain unchanged.

[0025]

As described above, according to the present invention, by automatically changing a temporary symbol (macro) to a formal symbol, a connection error and a placement error caused by a human being in circuit diagram creation can be prevented, and the circuit diagram can be prevented. There is an effect that the quality of correction can be improved.

Further, the provisional symbolization of the functional part whose specification has not been determined has an effect that the preceding circuit design of the circuit excluding the undetermined part can be advanced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a system to which an embodiment of the present invention is applied.

FIG. 2 is a flowchart showing a procedure for creating a circuit diagram according to an embodiment of the present invention.

FIG. 3 is a flowchart showing a work procedure of a temporary symbol formal symbol automatic change mechanism shown in FIG.

FIG. 4 shows an example of a circuit diagram from a schematic design to a circuit design including undecided symbols in the present embodiment, (a)
FIG. 4A is a diagram showing a schematic design, FIG. 8B is a diagram showing a functional design with respect to the schematic design of FIG. 7A, and FIG.

5A and 5B show an example in which the undecided symbols in FIG. 4C are replaced with temporary symbols, FIG. 5A is a diagram showing an example of temporary symbols, and FIG. 5B is an undecided symbol in FIG. 4C. It is a figure which shows the circuit drawing which replaced with the temporary symbol of (a).

6A and 6B show an example in which the temporary symbol of FIG. 5B is replaced with a formal symbol, FIG. 6A shows a formal symbol corresponding to FIG. 5A, and FIG. 6B shows a formal symbol and a temporary symbol. It is a figure which shows the correspondence of each symbol of and.

FIG. 7 is a diagram showing a circuit diagram in which all of FIG. 4 (b) is created with formal symbols.

[Explanation of symbols]

 10 CAD Drawing Database 11 Symbol Library 12 Correspondence Table Storage 13 Circuit Creation Editor 14 Drawing Change Processing Storage 15 Display 16 Keyboard 17 Mouse 18 CPU 19 Printer

Claims (1)

[Claims] 1. A symbol storage means for storing a plurality of symbols representing a predetermined function used for creating a circuit diagram, and a circuit diagram creation means for creating a circuit diagram on a display screen using the plurality of symbols. First circuit diagram editing means for editing the circuit diagram by moving, adding, or deleting symbols on the display surface, and a symbol of a circuit portion that has not been determined at the time of hierarchical design of the circuit is temporarily changed to a temporary symbol. First registration means for determining and registering the temporary symbol in the symbol storage means, and second circuit diagram editing means for editing a circuit diagram including the temporary symbol when the temporary symbol is registered, When a formal symbol is determined for the temporary symbol, a storage unit for creating and storing a correspondence table of the input / output symbol of the temporary symbol and the input / output symbol of the formal symbol, and the formal symbol for the syn Second registration means for registering in the memory storing means; and third circuit diagram editing means for editing the circuit diagram into a circuit diagram containing the formal symbol when the correspondence table is stored and the formal symbol is registered. A circuit drawing creation system comprising: