JPH03123974A - Signal line display method for cad - Google Patents

Abstract

PURPOSE:To display a special signal line exactly as well as quickly by extracting the designated signal line and the signal line connected directly to it, and bestowing peculiar attributes to them, and displaying each signal line bestowed with the attribute. CONSTITUTION:A signal line name decoding part 21 decodes the signal name of the signal line designated by an operator. A connected signal line grasp part 22 grasps the signal line connected directly to the designated signal line. A same signal name retrieval part 23 finds out the same signal name as the decoded signal line. At attribute bestowal part 24 bestows the attributes to each signal line extracted by the grasp part 22 and the the retrieval part 23 and the designated signal line. A discrimination display part 25 discriminates and displays the signal line bestowed with the attribute by the bestowal part 24. The respective parts 21 to 25 are operated by a data processing part 1. Thus, the specified display of the signal line having the same signal name as the designated signal is executed automatically together with the specified display of the designated signal line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for designing an electronic circuit using CAD, and particularly to a method for displaying signal lines.

[Prior Art] Conventionally, in the notation of signal lines in electronic circuit design using CAD, when indicating that a signal line is a special signal line,
While looking at the drawing displayed on the display, the user
This is done in an interactive format, using an input device such as a tablet or mouse, by manually inputting symbols, characters, etc. that indicate a special signal line directly near the corresponding signal line.

FIG. 5 is an actual diagram showing signal lines with special markings according to the prior art.

The signal line (SIG(+)) 51, which requires a special guard ground when fabricated as a printed board, is connected to the broken line 52.
53 and is indicated in a box.

The signal line (S I G (1)) 51 connects the element 57 and the element 5.
However, the wiring diagram of element 56 is connected to element 57.
is written in a separate location. Therefore, the broken line 52.
53, input the broken line 54.55 and connect the signal line (S
IG(1)) 58, and this signal line (SIG(1))
1)) 58 indicates that a special guard earth is required.

[Problems to be Solved by the Invention] In conventional CAD electronic circuit design, when describing a special signal line, if the signal line is long, it is necessary to perform input operations multiple times. Therefore, it takes more effort. Furthermore, if the signal line is divided into multiple lines and input, the operator has to search for the signal line, which takes more time and, in the worst case, leads to omission of input. there is a possibility.

For electronic circuit design and design changes using CAD,
A large amount of man-hours is required. Therefore, circuit simulation, logic simulation, and failure simulation are performed to confirm the validity of the circuit.

It is possible to check whether the connection of line 11 is correct by using these simulations, but if the signal line is a special one, omissions in the notation cannot be confirmed by these simulations, so please check the omissions in the notation. In order to avoid this as much as possible, a heavy burden was placed on the operator.

An object of the present invention is to provide a CAD signal line display method that solves these problems of the prior art and displays special signal lines accurately and quickly without imposing a burden on the operator. .

[Means for Solving the Problem] In order to achieve the above object, the CAD signal line display method of the present invention includes a signal decoding step of decoding the signal name of the signal line specified by a human-powered device; a signal line search step with the same signal name for searching for a signal line having the same signal name as the signal name decoded in , and a connected signal line grasping step for grasping the signal line directly connected to the signal line specified by the input device. and an attribute assignment step of assigning a unique attribute to the signal line extracted in the connection signal line grasping step and the same signal name line 3 search step, and the signal line specified by the input device;
The present invention is characterized in that it includes an identification display step of displaying each signal line to which a unique attribute has been assigned in the attribute assignment step on a display section.

[Effect]

In the present invention, in order to specify that a certain signal line is a special signal line, the user uses an input device such as a mouse while looking at the circuit diagram displayed on the display unit to specify the corresponding signal line. Specify one signal line, give a special attribute to that signal line, and input it.

In the signal decoding step, the signal name of the signal line specified by the user is decoded, and in the same signal name signal line searching step, all signal lines having the same name as the decoded signal name are searched.

In the connected signal line identifying step, signal lines directly connected to the signal line designated by the user are identified.

In the attribute assignment step, specified special attributes are assigned to the signal lines extracted in the connection signal line understanding step and the same signal name line 1 search step, and to the signal lines specified by the user using the human power device. .

Then, in the identification display step, each signal line to which a special attribute has been assigned in this attribute assignment step is displayed on the display section together with the special attribute.

In this way, when a user gives unique attribute information to one signal line using an input device, it also applies to signal lines directly connected to this signal line or signal lines with the same signal name. , this unique attribute information is given and displayed on the display unit.

〔Example] Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a C
FIG. 1 is a block configuration diagram showing an example of an AD system.

A data processing section 1 that has a signal line display processing section 5 and performs processing as a CA I), a screen display section 2 that displays the processing results of the data processing section I, and a data processing section that is operated by an operator. The system comprises a keyboard 3 for manually inputting instructions to the computer, and a mouse 4 for inputting instructions to the data processing section 1 by an operator while viewing the screen display section 2.

The data processing unit 1 includes the signal line display processing unit 5 of the present invention and executes control processing of the entire CAD system, and is used to input operation information from the operator to the data processing unit 1. keyboard 3 and mouse 4
is connected.

Further, the screen display unit 2 is a CRT (Catboard R
ayTube), and displays various messages and data from the data processing unit 1 to the operator.

Using a system configured as described above, an operator can proceed with CAD operations in an interactive manner.

First, the operator specifies a signal line on the image display section 2 with the mouse 4 to which he wants to give a specific attribute.

The data processing unit 1 searches the related signal line based on the specified signal line in the signal line display processing unit 5,
The same specific attributes are given, and each related signal line is identified and displayed on the image display section 2.

In this way, the pig processing section 1 having the signal line display processing section 5
automatically describes special signal lines for all target signal lines.

FIG. 2 is a functional block diagram showing the processing functions of the signal line display processing section 5 in FIG. 1.

A signal name decoder 21 that decodes the signal name of the signal line specified by the operator. A connection signal line grasping section 22 that grasps the signal line that is directly connected to the specified signal line, and a signal line that searches for a signal line that has the same signal name as the signal line decoded by the signal name decoding section 21. Name signal line search unit 23, and connection signal line grasp unit 22 and signal name signal line search unit 2
an attribute assigning unit 24 that assigns attributes to each signal line extracted by 3 and the designated line 15;
Add attributes by 15. It is comprised of an identification display section 25 that displays identification information for Route 15.

Each of the units 21 to 25 is a processing step of a program executed by the data processing unit 1 in FIG. 1, respectively.

By working in conjunction with each other, each functional unit can display a specific signal line specified by the operator. Automatically performs specific display of signal lines with the same signal name as Line 3.

FIG. 3 is a flowchart showing the processing operation in the signal line display processing section 5 of the data processing section 1 in FIG.

First, an attribute is given to a signal line specified by an operator and requiring a specific notation (step 301).

Next, search the drawing information for signal lines that are directly connected to the specified signal line and signal lines that are not directly connected but have the same signal line name, and Assign attributes as data (step 30
2).

Then, all signal lines to which attributes have been given are identified and displayed while indicating their attributes (step 303).

In this way, the data processing unit J automatically displays identification on all eight signal lines of the identification display based on the processing in the signal line display processing unit 5, and displays the identification on the screen display shown in FIG. Display on 2.

FIG. 4 is an actual diagram showing the signal lines actually identified and displayed by the system in FIG.

The element 7-41 and the element 42 are connected by signal lines (Al) 43.44. Furthermore, signal line (A1) 43.4
4 are respectively surrounded by broken lines 45 and 46, indicating that they are specific signal lines.

In other words, it shows a case where a signal line with the same signal name is divided into two lines, and if one of the signal lines is specified to be displayed as a specific signal line, then the Since both sides have the same attribute and are similarly identified and displayed as a specific signal line, according to this embodiment, even if one signal line is divided and displayed, the Since it is possible to search for related communication lines and collect unique attribute information for identification, etc., the operator only needs to do the work once, which prevents mistakes due to omission of human labor. I can do it.

[Effects of the Invention] According to the present invention, in signal line display in CAD,
Display of special signal lines without placing a burden on the operator.
This can be done accurately and quickly.

[Brief explanation of the drawing]

FIG. 1 shows a C having a line A display processing section to which the present invention is applied.
FIG. 2 is a functional block diagram showing the processing functions of the signal line display processing section in FIG. 1, and FIG. 3 shows the processing operation of the data processing section in FIG. 1. 4 is an actual diagram showing the signal lines actually identified and displayed by the CAD system in FIG. 1, and FIG. 5 is an actual diagram showing the signal lines with special indications according to the prior art. l: data processing section, 2: screen display section, 3: keyboard,
4: Mouse, 5: Shinkyu line display processing unit, 21: Signal name solution 1
υ and section, 22: Connection signal line grasping section, 23: Signal name communication section, 24: Attribute assignment section, 25 Identification display section, 4
1,42: Element, 43.44 + signal line (AI), 45
, 46: Broken line, 51: Signal line (SIG(1)), 52
~55: Broken line, 56, 57: Plain? . 58: Signal line (SIG(1)). Figure Figure Figure 3 Figure Figure 1 2

Claims (1)

[Claims] (1) While looking at the circuit diagram displayed on the display unit, the user uses an input device to specify a signal line in the circuit diagram, assigns a unique attribute to the signal line, and assigns the unique attribute to the signal line. A CAD signal line display method for displaying a signal line assigned with a same signal name signal line search step of searching for a signal line having the same signal name as the same signal name;
a connection signal line grasp step of grasping a signal line directly connected to the signal line specified by the input device; a signal line extracted in the connection signal line grasp step and the same signal name signal line search step; and an attribute assigning step of assigning a unique attribute to the signal line specified by the input device, and an identification display step of displaying each signal line assigned the unique attribute in the attribute assigning step on the display unit. A CAD signal line display method comprising: