JPH01197880A - Circuit drawing displaying system - Google Patents

Abstract

PURPOSE:To accurately and promptly recognize a standard to indicate whether a wiring is possible or not by retrieving a signal wiring in an inputted circuit drawing, detecting the number of pin pairs connected each other by the obtained signal wiring, and displaying the detected number of the pin pairs on a displayed drawing. CONSTITUTION:Signal wiring 13a and 13b in the inputted circuit drawing are retrieved, the number of the pin pairs connected each other is detected by the obtained signal wirings, and the detected number of the pin pairs is displayed on a display picture 11. Namely, the number of the pin pairs in the inputted circuit drawing is detected by retrieving the signal wirings 13a and 13b in the circuit drawing and displayed on the display picture 11. The number of the pin pairs in the circuit drawing is detected by counting the number of pins connected to the detected signal wirings 13a and 13b, making a value obtained by subtracting 1 from the counted number of the pins into the number of the pin pairs for each of the signal wirings 13a and 13b, and obtaining the sum total of the each number of the pin pairs. Thus, the number of the pin pairs in the circuit drawing can be easily known.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circuit diagram display device for inputting and displaying circuit diagrams such as LSI logic circuits using a computer system.

[Conventional technology]

FIG. 4 is a block diagram showing the hardware configuration of this type of circuit diagram display device. In the figure, 1 is a display device body, 2 is a CRT for displaying circuit diagrams, etc., 3 is a keyboard for inputting commands, figures, etc. to the main body 1, and 4 is a CRT.
A mouse is used to specify a position on the screen of RT2, and 5 is an external storage device such as a magnetic disk device in which various circuit components and circuit drawings are stored as drawing information.

The display device body 1 includes a CPU 6 and a ROM in which programs and data processed by the CPU 6 are stored. and RAM
8, a CRT controller 9 that controls the CRT 2, and an I10 interface IO that controls input/output interfaces with the keyboard 3, mouse 4, and external storage device 5, and are connected to each other by an internal bus 1a.

FIG. 5 shows a logic circuit diagram displayed on the screen 11 of the CRT 2, and signal wiring 13a is connected between the corresponding terminals of each element 12a to 12e.

13b, and is displayed as a logic circuit diagram.

Next, the operation will be explained. When a predetermined command is input from the keyboard 3, this command is sent to the CPU 6 via the I10 interface 10. CPU6 is RO
The software stored in M7 interprets the command and gives instructions to the CRT controller 9 and I10 interface 1O.

Here, when a command to read the elements 12a to 12e from the external storage device 5 is input from the keyboard 3, the elements 12a to 1243 are read from the external storage device 5 via the I10 interface 10 in the above-described procedure, and the mouse 4
Each element 128 to 12 is placed at a desired position on the CRTZ using
Place e. Furthermore, by inputting a command from the keyboard 3 to draw line segments between the corresponding terminals of each of the elements 12a to 12e arranged on the CRTZ, the signal wiring 1
Connect using 3a and 13b.

By repeating such operations, a logic circuit diagram as shown in FIG. 5 is drawn on the screen of the CRT 2. The displayed logic circuit diagram can be written to the external storage device 5 using a write command.

[Problem to be solved by the invention]

Conventional circuit drawings are displayed as described above, but in order to know the number of pin pairs, which is the number of signal wires in the input circuit drawing, it was necessary to count the number directly on the screen. The number of pin pairs is a guideline for determining whether LSI wiring is possible or not, but there is a problem in that when the circuit drawing becomes complex, it takes time and effort to know the scale of the number of pin pairs of the displayed LSI circuit. .

This invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide a circuit drawing display method that allows the number of pin pairs in a circuit drawing to be easily known.

[Means to solve problem fever]

The circuit drawing display method according to the present invention searches for signal wiring in an input circuit drawing, detects the number of bin pairs connected to each other by the obtained signal wiring, and displays the number on the display screen. be.

[Operation] In the present invention, the number of pin pairs in a human-drawn circuit drawing is detected by searching for signal wiring in the circuit drawing and displayed on the display screen. The number of pin pairs in the circuit drawing is detected by counting the number of pins connected to the searched signal wiring, subtracting 1 from the number of pins as the number of pin pairs for each signal wiring, and calculating the sum. be able to.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a flowchart showing the main part of the circuit diagram display method according to the embodiment. In the same figure, 2
0 to 26 indicate each step of the flow of the program that executes this method. Further, FIG. 2 shows a display screen 11 displayed on a CRT according to this embodiment, and 14 is a display of the total number of bin pairs. FIG. 3 shows a pin bear number table 15 that stores 16 signal names and 17 bin pair numbers indicating the number of wires for the signal.

The hardware configuration is the same as the conventional device shown in FIG. 4, but the difference is that the program having the contents of the flowchart shown in FIG. 1 and the bin pair number table 15 shown in FIG. 3 are stored in the RAM 8. The point is that the program can be started and executed by inputting a command from the keyboard 3.

Next, the operation will be explained. It is assumed that a logic circuit diagram has been input and displayed on the display screen by the operation described in the conventional example. In FIG. 1, the program started by the above-mentioned command in step 20 first reads the number of bin pairs 17 in the pin pair number table 15 shown in FIG. 3, which is stored in the RAM 8 in FIG. Initialize 0 Next, in step 22, the signal wirings 13a and 13b are sequentially searched in the logic circuit diagram displayed on the CR7 screen 11 as shown in FIG. When an arbitrary signal wiring is searched, in step 23, the number of pins connected to the searched signal wiring is counted, the value subtracted by 1 from the number of pins is set as the number of pin pairs of the signal wiring, and the pin pair number table 15 is calculated. Signal name searched in 16
Substitute the number of pin pairs corresponding to 17. - Next, in step 24, the signal wiring 13a on the CR7 screen 11.

Determine whether all 13b have been searched, and if there are still signal wirings to be searched, repeat from step 22 again.
If there is no bin pair number table 15 in step 25.
The total sum of all pin pair numbers 17 is calculated and stored in the total column in the bin pair number table 15, and the sum of the pin pair numbers is displayed on the CR7 screen 11. FIG. 2 shows the bin pair number summation display 14 and a logic circuit diagram displayed in this manner. Signal wiring 13 as shown in the figure
a, 13b and the bin pair number total display 14 are displayed on the same screen. Finally, in step 26, the execution of the above command is ended.

In the above embodiment, the signal wiring in the logic circuit drawing displayed on the CRT screen was searched, but by specifying the logic circuit drawing, the signal wiring in the external storage device 5 that is not displayed on the CRT screen is searched. It is also possible to search for signal wiring in the written logic circuit diagram.

Further, the displayed circuit diagram is not necessarily limited to a logic circuit, but may be an analog circuit diagram including a plurality of elements.

Furthermore, although the explanation has been made assuming that the program that implements this method is stored in RAM 8 and executed by the CPU,
7 may be stored.

〔Effect of the invention〕

As described above, according to the present invention, the signal wiring in the input circuit drawing is searched, and the number of pin pairs connected to each other by the obtained signal wiring is detected and displayed on the display screen. , the number of pin pairs in a circuit drawing can be easily known without having to visually count them, and the effect is that it is possible to know whether or not wiring can be done accurately and quickly.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the main parts of a circuit diagram display method according to an embodiment of the present invention, and FIG. 2 is a CR diagram according to an embodiment of the present invention.
A diagram showing a display example of the T screen, FIG. 3 is a diagram showing a bin pair number table that stores the signal names and pin bear numbers of the logic circuit diagram, and FIG. 4 is a block diagram showing the hardware configuration of the circuit diagram display device. FIG. 5 is a diagram showing a display example of a conventional CRT screen. 1 is the display device body, 2 is the CRT, 3 is the keyboard, 4 is the mouse, 5 is the external storage device, 6 is the CPU, 7 is the ROM,
8 is RAM, 9 is CRT controller, 10 is I10 interface, 11 is CRT screen (display screen), 12a
- 12e are elements, 13a and 13b are signal wirings, 14 is a total display of the number of bin pairs, 15 is a pin pair number table, 16 is a signal name, and 17 is the number of pin pairs. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Daikun Masu (2 idiots) 61 Figure 17; Please refer to the letter 7. L 1; Display device itself Figure 5 procedural amendment (voluntary) Heisei 1315 →N← 2002 Commissioner of the Japan Patent Office VξΔ1
, Indication of the case Japanese Patent Application No. 63-022213 2 Name of the invention Circuit drawing display method 3 Representative of the person making the amendment Moriya Shiki 5 Column for detailed explanation of the invention to be amended. 6. In the first line of page 8 of the detailed statement of amendments, the phrase ``Store and use CPU 6'' is amended to ``Store and use CPU 6.''that's all

Claims (1)

[Claims] In a circuit diagram display device that inputs a circuit diagram and displays it on a display screen using a computer system, it searches for signal wiring in the input circuit diagram and detects the number of pin pairs connected to each other by the obtained signal wiring. A circuit drawing display method characterized in that the circuit drawings are displayed on a display screen.