JP2773152B2 - Circuit diagram processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for graphic processing means. In particular, the present invention relates to processing means for a remaining portion obtained by cutting out a part of an input circuit diagram.

〔Overview〕

The present invention provides a means for adding an external terminal symbol to a signal line symbol erased by erasing a part of a circuit diagram, by automatically positioning an external terminal symbol with a lead wire at a predetermined position. Therefore, it is possible to prevent troublesome omission and omission of symbol arrangement.

[Conventional technology]

In the conventional example, when a part of the circuit diagram is removed, the external terminals are individually defined manually for each of the cut signal lines on the remaining circuit diagram.

[Problems to be solved by the invention]

In such a conventional example, when a part of a circuit diagram is removed, a connector symbol or an external terminal symbol is defined for a signal line which has been cut off and left in the original circuit diagram in order to complete the drawing. It is necessary to arrange the symbols by manual operation each time, so that there is a disadvantage that it takes time and omission of arrangement of the symbols.

An object of the present invention is to provide a circuit diagram processing apparatus capable of automatically arranging symbols for completing a drawing, in order to eliminate such a drawback.

[Means for solving the problem]

The present invention provides a display means for determining a point position on a display screen in a rectangular coordinate system, and a graphic input for giving pattern information indicating a circuit diagram in which device symbols are connected to the display means by signal line symbols parallel to the coordinate axes of the display means. In a circuit diagram processing apparatus provided with a means, a circuit designating means for designating a partial area of a pattern showing a circuit diagram displayed on the display means, and a circuit diagram for erasing a pattern in the area designated by the area designating means Erasing means; end point coordinate calculating means for obtaining coordinates of an intersection between the boundary line of the area specified by the area specifying means and the signal line symbol; direction of the signal line symbol intersecting the boundary line of the area and this boundary line Direction determining means for determining the positional relationship between the terminal symbol and the erased portion of the signal line symbol. Terminal symbol generating means for creating one of the patterns added to the left, upper or lower side, and arranging the end point of the lead line at the coordinate point obtained by the end point coordinate calculating means. .

[Action]

The circuit diagram being processed is displayed on the graphic display, and an arbitrary area on the circuit diagram is designated with the mouse or the trackball on the circuit diagram. The designated area information is sent to the circuit diagram editing processing unit, and a terminal symbol is automatically generated.
Displayed on the graphic display. The circuit diagram data in which the terminal symbols are automatically generated is stored on a hard disk or a floppy disk.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing the configuration of this embodiment. In this embodiment, as shown in FIG.
A circuit diagram input unit 2 having a mouse 21, a trackball 22 and a keyboard 23;
And a storage unit 4 having a hard disk 41 and a floppy disk 42.
The apparatus includes a circuit diagram erasing unit 11, an end point coordinate calculating unit 12, a direction determining unit 13, and a terminal symbol generating unit 14. That is, in this embodiment, the graphic display 3 is a display means in which the point position on the display screen is determined in the rectangular coordinate system.
And graphic input means for providing the display means with pattern information indicating a circuit diagram in which device symbols are combined with signal line symbols parallel to the coordinate axes of the means, and a partial area of the pattern indicating the circuit diagram displayed on the display means A circuit diagram input unit 2 having an area designating means for designating a pattern, a circuit diagram erasing means 11 for erasing a pattern in an area designated by the area designating means, and a boundary line of the area designated by the area designating means. An end point coordinate calculating means 12 for obtaining coordinates of an intersection with the signal line symbol, a direction of the signal line symbol intersecting with the boundary of the area, and a positional relationship between the boundary and the erased portion of the signal line symbol are determined. Direction determining means 13
Based on the determination result of the direction determining means 13, one of the patterns in which the lead line is added to the right side, left side, upper side, or lower side of the terminal symbol is created. Terminal symbol generating means 14 for arranging the end points of the outgoing lines.

FIG. 3 is a flowchart showing the operation of this embodiment. First, the operation of this embodiment will be described with reference to FIGS.

When a desired erasure area of the circuit diagram on the graphic display 3 is designated by the mouse 21 or the trackball 22 (step S1), the circuit diagram erasing means 11 erases the circuit diagram in the designated area (step S2). Continued,
The end point coordinate calculating means 12 obtains the end point coordinates of the signal line cut at the boundary of the designated area (step S3), and the direction determining means 13 obtains the direction of the cut signal line (step S3).
Four). The terminal symbol generation means 14 automatically generates a terminal symbol on the circuit diagram based on the determined end point coordinates of the signal line and the direction of the signal line (step S5). Information relating to this circuit diagram is stored in the hard disk 41 or floppy disk 42.

That is, in the example of the display screen shown in FIG. 4, when there are signal lines 31a, 31b and 31c intersecting with an arbitrary area 30 designated by the circuit diagram input unit 2, a state where the inside of the area 30 is removed is shown. This is shown in the display screen example of FIG. Signal line end points 32a, 32b
And 32c are points where the signal lines 31a, 31b and 31c intersect with the outside of the area 30, and are not connected to anywhere cut off because the area 30 is removed. The end points 32a, 32b, and 32c are incomplete as circuit diagrams, and cannot pass correct data at the time of logic verification (such as logic simulation) or mounting setting (placement, wiring, and the like). One way to remove imperfections without changing the meaning (logic) of the circuit diagram is to replace the circuit in region 30 with another means (eg, macro or LSI).
) Are replaced by symbols representing them. FIG. 6 shows a display screen example in which the area 30 is replaced with the symbol 33 by this method. Another method is to define the end points 32a, 32b and 32c as terminal symbols. In this embodiment, a method of removing imperfections in a circuit diagram by converting the symbols into terminal symbols is used.

FIG. 7 is an example in which the area 30 and the signal lines 31a, 31b and 31c intersecting the area 30 are enlarged and displayed. The line segments of the respective signal lines 31a, 31b and 31c intersecting with the region 30 are 34a,
The end point coordinates of 34b and 34c are (x _1i , y _1i ) and (x _2i , y
_2i ) {where i = a, b, c}, and the coordinates of the point where the line segments 34a, 34b and 34c intersect with the outside of the area 30 are (x _3i , y
_3i ) {where i = a, b, c}, the terminal symbol should be generated at the point (x _3i , y _3i ) when the circuit in the region 30 is removed.

FIG. 8 shows types of terminal symbols. Terminal symbol b is obtained by rotating terminal symbol a by 90 ° counterclockwise, and terminal symbol c is obtained by rotating terminal symbol b by 90 ° counterclockwise. Similarly, terminal symbol d is obtained by rotating terminal symbol c by 90 ° counterclockwise. When the terminal symbol d is further rotated 90 ° counterclockwise, it becomes the same symbol as the terminal symbol a.

When a terminal symbol is generated, the tip of the lead wire is made coincident with a point ( _x3i , _y3i ), and the terminal symbols a, b, c and d are selectively used depending on the directions of the line segments 34a, 34b and 34c.
That is, when _y1i = _y3i and _x1i > _x3i , the terminal symbol 19c is used. When _y1i = _y3i and _x1i < _x3i , the terminal symbol is used.
When 19a is used and _x1i = _x3i and _y1i > _y3i , the terminal symbol 19d is used. When _x1i = _x3i and _y1i < _y3i ,
Use the terminal symbol 19b.

In this way, terminal symbols for the signal line end points 32a, 32b, and 32c are generated in the same direction as the signal lines. FIG. 9 shows the result of automatic generation of terminal symbols.

〔The invention's effect〕

As described above, according to the present invention, when a part is cut out from a circuit diagram, a terminal symbol is automatically generated and its incompleteness is removed, so that the working time is shortened and the working efficiency is improved. Further, even when a circuit whose logic is difficult to verify exists in the circuit diagram, there is an effect that the circuit which is difficult to verify is removed and the remaining circuit can be easily verified.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a configuration diagram of a circuit diagram editing processing unit shown in FIG. FIG. 3 is a flowchart showing an operation procedure of the embodiment of the present invention. FIG. 4, FIG. 5, FIG. 6, and FIG. 9 are examples of display screens of the circuit diagram processing device. FIG. 7 is a partially enlarged view of FIG. FIG. 8 is a diagram showing types of terminal symbols. 1 ... circuit diagram editing processing unit, 2 ... circuit diagram input unit, 3 ...
Graphic display 4, storage unit 11, circuit diagram erasing means 12, end point coordinate calculating means 13, direction determining means 14, symbol generating means

Claims (1)

(57) [Claims] 1. A display means for determining a point position on a display screen in an orthogonal coordinate system, and a figure for giving pattern information indicating a circuit diagram in which device symbols are connected to the display means by signal line symbols parallel to the coordinate axes of the means. In a circuit diagram processing apparatus provided with input means, an area designating means for designating a partial area of a pattern showing a circuit diagram displayed on the display means, and a circuit for erasing a pattern in the area designated by the area designating means Figure erasing means; end point coordinate calculating means for obtaining coordinates of an intersection between the boundary line of the area specified by the area specifying means and the signal line symbol; direction of the signal line symbol crossing the boundary line of the area and this boundary; Direction determining means for determining the positional relationship between the line and the erased portion of the signal line symbol; Terminal symbol generating means for creating one of the patterns added to the right side, left side, upper side or lower side of, and arranging the end point of the lead line at the coordinate point obtained by the end point coordinate calculating means. Circuit diagram processing apparatus.