JPH06187394A - Terminal specifying device - Google Patents

Abstract

PURPOSE:To provide a terminal specifying device which can easily specify a target terminal even when the movement precision of a marker is coarse by moving the marker into a frame encircling a logic symbol and then specifying the logic symbol by button operation, and repeating the button operation and specifying the desired terminal. CONSTITUTION:The marker is moved to the vicinity of the desired logic symbol by operation a mouse, whose button is pressed. The device recognizes that the logic symbol in the frame is specified and blinks the output terminal Y of the logic symbol. Then the button operation is repeated and then the blinking moves cyclically in the order of an input terminal A2, the output terminal Y, and an input terminal A1. Thus, the desired terminal of the logic symbol is specified and then the mouse is operated again to move the marker to the position of an OR gate. At the moment the marker moves out of the frame on the way of movement, the blinking of the output terminal Y transfers to lighting and consequently the specification of the output terminal Y is determined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention specifies a desired terminal of a desired logic symbol when wiring between logic symbols displayed on a display in the design of an LSI logic circuit using CAD, for example. The present invention relates to a terminal designating device used for

[0002]

2. Description of the Related Art In designing an LSI logic circuit using CAD, a logical symbol is displayed on a display, and a terminal having the logical symbol and a terminal having another logical symbol are designated, so that those terminals are connected to each other. A logic circuit diagram is created by a method of instructing wiring.

FIG. 2 is a schematic diagram showing a method of designating a logical symbol and its terminal displayed on the display in the above case. For example, many logical symbols as shown in FIGS. 2A and 2B are displayed on the display, and markers such as arrows shown in FIG. 2 are also displayed on the display. The operator moves the marker to the position of the desired terminal of the desired logical symbol on the display using, for example, a mouse, and then pushes a button provided on the mouse or the like to transmit a trigger to the device, The terminal pointed to by the marker is specified. When such designation of terminals is repeated twice, the designated terminals are wired on the display.

[0004]

However, since it is necessary to display a logic circuit diagram consisting of a large number of logic symbols on the display, the display size of each logic symbol is quite small.
In addition, the display of each individual terminal is very small, it is difficult to correctly align a marker such as an arrow to the position of the terminal, it takes time to correctly align the desired terminal, and, for example, when adjacent terminals are It may be specified incorrectly and may be miswired.

In view of the above circumstances, it is an object of the present invention to provide a terminal designating device which makes it easy to designate a desired terminal of a desired logic symbol.

[0006]

A terminal designating device of the present invention for achieving the above object includes (1) a logic circuit diagram described by a plurality of logic symbols and wirings between the plurality of logic symbols, and Display for displaying a marker indicating a predetermined point in this logic circuit diagram (2) Marker moving means for moving the marker displayed on the display (3) Desired logic symbol in the logic circuit diagram displayed on the display In a terminal designating device having a trigger input means for inputting a trigger for designating a desired terminal of (4), a predetermined terminal of a desired logical symbol is designated by inputting a first trigger after the marker is moved. Then, the next terminal of the desired logical symbol is cyclically specified for each input of the trigger in the state where any terminal of the desired logical symbol is specified. It is characterized in that a terminal designating means is provided.

[0007]

Since the terminal designating device of the present invention is provided with the terminal designating means of the above (4), it is not necessary to directly design the desired terminal itself, and the desired display size is much larger than the individual terminal. A logical symbol is designated, and a desired terminal is designated by adjusting the number of times of input of a trigger after designating a logical symbol having the desired terminal. in this way,
In the terminal designating device of the present invention, the accuracy of the marker alignment may be about the display size of each logical symbol, and therefore the terminal designation becomes much easier than in the conventional case.

[0008]

EXAMPLES Examples of the present invention will be described below. Figure 1
FIG. 6 is a schematic diagram showing a method of designating a logical symbol and its terminal displayed on a display according to the present invention. A large number of logical symbols as shown in FIGS. 1A and 1B are displayed on the display, and markers such as arrows shown in FIG. 1 are displayed.

Although the frame surrounding the logic symbol and its terminals shown in FIGS. 1A and 1B may be displayed, the logic circuit on the display may be difficult to see because of that, and the frame is clearly shown. It may be stored in the device without being displayed. For example, by operating the mouse or the like, the marker is moved to the vicinity of the desired logical symbol (for example, the AND gate in FIG. 1A) (in the area surrounded by the frame) and the button provided on the mouse is moved. Push. Then, the device recognizes that the logical symbol in the frame is designated and blinks the output terminal Y of the logical symbol, for example. When the mouse button is pressed again in this state, the blinking of the output terminal Y disappears this time, and the input terminal A1 blinks instead. After that, when the button operation is repeated, the blinking cyclically moves from the input terminal A2 → the output terminal Y → the input terminal A1 →. In this way, the desired terminal of the logical symbol (for example, the output terminal Y of the AND gate in FIG. 1A) is designated, and then the mouse is operated again to move the marker to the next OR gate shown in FIG. Move to the position. At the moment when the marker moves out of the frame shown in FIG. 1A during the movement, the blinking of the output terminal Y shifts to lighting, and the designation of the output terminal Y is confirmed. When the marker is moved to the frame surrounding the OR gate shown in FIG. 1B and the button is operated, the output terminal Y of the OR gate blinks in the same manner as above, and the blinking depends on the number of times the button is operated thereafter. Input terminal A1 → Input terminal A2 → Output terminal Y →
Move in this order. As a result, for example, when the output terminal A2 is blinked and the marker is moved outside the frame surrounding the OR gate in that state, the designation of the input terminal A2 of the OR gate is confirmed, and the output terminal Y of the AND gate of FIG. 1
The input terminal A2 of the OR gate in (b) is wired.

As described above, in this embodiment, the frame surrounding the logical symbol is explicitly or conceptually set, the marker is moved into the frame, and then the button operation is performed to specify the logical symbol, and the button is pressed. Since the configuration is such that the desired terminal is designated by repeating the operation, the accuracy of the movement of the marker is rough and the designation of the desired terminal becomes extremely easy. It should be noted that in the above embodiment, the description has been made assuming that the designation of the terminal is confirmed by moving the marker outside the frame, but the confirmation of the designation of the terminal is confirmed by the predetermined time after the designation of the predetermined terminal (in the above-mentioned embodiment, blinking) The designation may be confirmed when no button operation is performed, or the designation confirmation input may be separately provided by operating a button other than the button.

Although the frame surrounding the logical symbol is set explicitly or conceptually in the above embodiment, the logical symbol itself may be designated by a marker without setting such a frame. Further, by combining the present invention and the conventional terminal designating method, when a logical symbol is designated, the terminals are designated cyclically according to the button operation, and when the marker is directly moved to the terminal and the button operation is performed, The terminal may be designated so that the above-mentioned cyclic designation is not performed.

As described above, the present invention is used when designating a terminal of a logic symbol displayed on a display, and can have various modified modes.

[0013]

As described above, since the terminal designating device of the present invention is configured to directly designate a logical symbol and cyclically designate the terminal of the logical symbol for each input of the trigger, Designation becomes extremely easy.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a method of designating a logical symbol and its terminal displayed on a display according to the present invention.

FIG. 2 is a schematic diagram showing a conventional method of specifying a logic symbol and its terminal displayed on a display.

[Explanation of symbols]

 Y output terminal A1, A2 input terminal

Claims (1)

[Claims] 1. A logic circuit diagram described by a plurality of logic symbols and wiring between the plurality of logic symbols, and a display that displays a marker indicating a predetermined point in the logic circuit diagram, and a display on the display. A terminal provided with marker moving means for moving the displayed marker, and trigger input means for inputting a trigger for designating a desired terminal of a desired logic symbol in the logic circuit diagram displayed on the display. In the designating device, a predetermined terminal of the desired logical symbol is designated by the input of the first trigger after the marker is moved, and one of the terminals of the desired logical symbol is designated as the trigger. A terminal designating device comprising terminal designating means for cyclically designating the next terminal of the desired logic symbol for each input.