JP2815738B2 - Interactive schematic editor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an editor for interactively creating a circuit diagram on a graphic display such as a workstation.

[0002] In designing a logic circuit, pins are frequently deleted or added in accordance with a change in a net or the like, so that an interactive circuit diagram editor on a workstation is an indispensable tool.

[0003]

2. Description of the Related Art When the number of pins is insufficient, a symbol from which a required number of pins are extracted is prepared from a database or the like, and is arranged in place of the original symbol. At this time, if the arrangement space is insufficient, a new symbol is moved to another position, and after the completion of the arrangement of the new symbol, the symbol is re-wired.

If there is a surplus in the number of pins, the surplus pins are processed as empty terminals. After that, when the number of pins becomes extremely small, the ratio of the area occupied by the symbol on the drawing increases, the wasteful area increases, and the use efficiency of the drawing decreases. Replace the large symbol with a small symbol having the required number of pins and rewire the symbol.

[0005]

Since the replacement of a symbol and the rewiring of a new symbol due to the deletion or addition of a pin have been performed by an input operation, the work amount is that the deletion or addition of a pin is frequent. It was enormous and a heavy burden on the operator. Further, since the thinking of circuit design is often interrupted, the work efficiency is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an editor of this kind which makes it possible to remarkably facilitate an operation when changing the number of pins. .

[0007]

In order to achieve the above object, an editor according to the present invention is configured as shown in FIG. 1, and the editor in the figure receives a pin number change request for receiving a pin number change request. Means 10, a symbol erasing means 12 for erasing a symbol whose number of pins has been requested to be changed, a wiring erasing means 14 for erasing the wiring of a symbol whose number of pins has been requested to be changed, and New symbol preparing means 16 for preparing a changed new symbol, new symbol displaying means 18 for displaying the prepared new symbol in place of the erased old symbol, and displaying and displaying the new symbol around and again. Rewiring display means 20 for connection.

[0008]

According to the present invention, when a change in the number of pins is requested, the target symbol and the wiring of the symbol are deleted, and a new symbol having the required number of pins is displayed instead of the original symbol. Then, a process of wiring a new symbol to the surroundings is automatically performed.

[0009]

In FIG. 2, a keyboard 32, a mouse 34, a tablet 36, a storage device 38, a printer 40, and a display 42 are connected to a computer main body 30. 36 are used.

The drawing being edited is displayed on the display 42.
The created drawing is stored in the storage device 38, and is output from the printer 40 onto paper as needed.

Further, all data necessary for editing the circuit diagram is stored in a database of the storage device 38, and the database is referred to at the time of processing of the computer main body 30.

When a user requests the processing apparatus main body 30 to perform a net connection process, a net deletion process, a pin addition process, and a pin deletion process (step 300 in FIG. 3).
(YES in 302, 304, and 306), the processing of the contents shown in FIGS. 4, 5, 6, 7, and 8 is started.

First, a target block (symbol)
A block name is obtained from the logical information of (1), and graphic information is extracted from the database with the block name (step 40).
0), the original graphic is redrawn with the background color based on this graphic information and is erased (step 402).

Next, all the pin figures are specified using the figure information of the same block (step 404), and these pins are also erased by redrawing with the background color (step 4).
06,408,410).

Further, using the logical information of the same block, logical information of all nets connected to the block is obtained (step 412), and a net figure is extracted from the database with these net names (step 414). .

Then, when all the net figures are erased in the same manner as the block figures and pins (step 4)
16, 418, 420), and the above processing is completed.
The process proceeds to the processes shown in FIGS.

In this process, first, the number of input / output pins is determined (step 500), and a name is given to the block (step 502). Next, it is checked whether or not the block name of the symbol whose number of pins is to be changed exists in the library of the database (step 504). If it does not exist (NO in step 506), the same block as the number of input / output pins is used. The most suitable symbol is created using the function (step 508), and this symbol figure is registered in the database as a temporary library (step 51).
0).

Further, the size of the block is specified using a database (step 512), and the position on the drawing is obtained using the logical information (step 51).
4) It is determined whether the symbol overlaps with another symbol or net on the drawing (step 516).

If the block overlaps with another symbol (YES in step 518), an error is notified to the user (step 520), and the position where the block is to be arranged is inquired (step 522).

If the block overlaps another net (YES in step 524), the net is searched from the database (step 526) and erased by overwriting using the background color (step 528).

When an area in which a new block can be drawn is secured as described above, the block is displayed using the block name, pin name, symbol name, and the like (step 5).
30), all information relating to this block is registered in the database (step 532).

Further, all nets connected to the displayed new block are created and displayed by referring to the database, and information on these nets is also registered in the database (steps 532, 534, 536).

Then, all of the once deleted surrounding nets are drawn again so as not to overlap with the newly displayed block display and registered in the database (step 53).
8,540,542,544).

FIG. 8 illustrates an AND symbol. Denotes an input pin, Denotes output pins, and each input pin 1. Have the pin names IN01, IN
02... INnn are connected to each output pin 2. Has the pin name OT
01, OT02... OTmm are given in order.

FIG. 9 illustrates a circuit display operation when deleting a pin. Is deleted by the user, the symbol 4. 4. input pin IN04 becomes unnecessary.

At this time, the user operates the pin 5. When the deletion of IN04 is requested, the symbol 4 and all its wiring are deleted, and a new symbol having three input pins as shown in FIG. Is the old symbol Is displayed instead of the same symbol. Is reconnected to the surrounding symbols.

FIG. 10 also illustrates the operation at the time of deleting a pin. And 8. Is deleted, the symbol 9. 10. input pin IN
02 and input pin 11. IN03 becomes unnecessary.

These input pins 10. IN02 and input pin 11. When the user requests deletion of IN03, symbol 9. And its wiring are erased, and a small two-input symbol is connected to the surrounding display and wiring as shown in FIG. Is displayed.

At this time, the pins 12 in FIG. I
12. Wiring (net) extracted from N03 Is affected by the pin deletion, and as shown in FIG.
5. 15. Wiring for connection with IN02 (Re-wiring is performed).

FIG. 11 illustrates the circuit display operation when a pin is added. In FIG. 18. Pins pulled out of When the user gives a request to select IN02 and add a pin having the same attribute, a large symbol 1 having three input pins as shown in FIG.
9. Is displayed in place of the previous symbol 17.

FIG. 12 also illustrates the circuit display operation when a pin is added. In FIG.
0. Input pins 21. The user gives a request to add two of the same attributes as INO2.

In this case, a large symbol having four input pins as shown in FIG. Is a small old symbol in FIG. Is displayed in place of the wiring 22. And overlap.

Therefore, as shown in FIG. Is a new symbol Bypassing this large symbol 23. Are displayed so as not to overlap (see FIG. 7).

As described above, according to the present embodiment, when a user requests deletion or addition of a pin, a new symbol whose pin has been deleted or added is displayed in an appropriate position by replacing it with the previous symbol. The operation of optimally rewiring the new symbol with the surroundings is automatically performed.

That is, the user operation when changing the number of pins is made only by the request, which is extremely easy. Therefore, the burden on the user can be greatly reduced, and the work efficiency of the circuit design can be greatly improved. Become.

[0036]

As described above, according to the present invention, the user operation when changing the number of pins is remarkably easy, so that the burden on the user is greatly reduced and the work efficiency of circuit design is dramatically improved. It is possible to increase.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a diagram illustrating the configuration of an embodiment.

FIG. 3 is a flowchart illustrating the operation of the embodiment.

FIG. 4 is a flowchart illustrating the operation of the embodiment.

FIG. 5 is a flowchart illustrating the operation of the embodiment.

FIG. 6 is a flowchart illustrating the operation of the embodiment.

FIG. 7 is a flowchart illustrating the operation of the embodiment.

FIG. 8 is a symbol diagram of AND.

FIG. 9 is an explanatory diagram of a circuit display when a pin is deleted.

FIG. 10 is an explanatory diagram of a circuit display when a pin is deleted.

FIG. 11 is an explanatory diagram of a circuit display when a pin is added.

FIG. 12 is an explanatory diagram of a circuit display when a pin is added.

[Explanation of symbols]

 30 computer main body 32 keyboard 34 mouse 36 tablet 38 storage device 40 printer 42 display

Claims (1)

(57) [Claims] 1. A pin number change request receiving means (10) for receiving a pin number change request, a symbol erasing means (12) for erasing a symbol for which a pin number change is requested, and a pin number change request. Wiring erasing means (14) for erasing the wiring of the symbols, new symbol preparing means (16) for preparing a new symbol having a changed number of pins in response to the request, and a prepared new symbol being erased. An interactive circuit diagram, comprising: new symbol display means (18) for displaying in place of the old symbol; and rewiring display means (20) for reconnecting the displayed new symbol to the surrounding display. editor.