JPH05114007A - System for editing printed circuit diagram - Google Patents

Abstract

PURPOSE:To provide a printed circuit diagram editing system capable of designing a circuit diagram by utilizing a designed circuit diagram in a circuit design supporting system based upon a computer. CONSTITUTION:A printed circuit diagram editing editor is provided with an appropriating information table forming means 1 to retrieve the same parts as inputted parts from an already designed circuit and form an appropriating information table 15 including an appropriating parts table 21 describing the information of the same parts and peripheral parts directly connected to the same parts and a connecting node information table 22 describing node information between the same parts and the peripheral parts and a parts list menu display means 2 to display un-inputted peripheral parts described in the table on a parts list menu. After arranging inputted parts on a circuit diagram, peripheral parts are successively inputted from the parts list menu and arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board circuit diagram editing system in a computer-aided circuit design support system (CAD), and more particularly to a circuit diagram design by utilizing a previously designed circuit diagram. The present invention relates to a printed circuit diagram editing method.

In the device design centered on digital circuits, automatic design by CAD has been generalized. In the circuit design centered on such a digital circuit, most of the printed circuit board circuits include a large-scale LSI that determines the function of the design apparatus and peripheral MSI and SS connected to the large-scale LSI.
It is composed of I. In this case, the surrounding MSI or SS
The type and connection form of the parts used for I are large-scale LSI.
Often determined by the type of.

In a printed board circuit diagram edit editor for designing a circuit of such a printed board, part information and connection node information are extracted from an already designed circuit diagram using the same part, and this circuit information is used by the designer. It is desired to reduce the burden on the designer in designing a printed circuit board and enable the standardization of the device design by making it possible to use it in a form that is easy to handle.

[0004]

2. Description of the Related Art Conventionally used methods for diverting a previously designed circuit diagram in a printed board circuit diagram editing editor include a method of copying the entire circuit diagram and a method of copying each page of the circuit diagram. was there.

[0005]

However, in the conventional diversion design method of the already designed circuit diagram, in any of the above cases, the graphic information including the connection information between the parts in the circuit diagram is copied. However, if there is not enough free space, it may not be possible to place it in the copy destination circuit diagram.
In addition, since batch copying is performed, the parts attribute information (part specifications, part names, etc.) intended by the designer may not match.
Therefore, it is necessary to reset the component information such as releasing the component attribute and setting the component attribute for the copied circuit diagram, which complicates the process.

As described above, in the conventional diversion design method of the already designed circuit diagram, there are some graphic restrictions such as the need for a sufficient empty area in the circuit diagram of the copy destination, and the component attribute not intended by the designer. There was a possibility that it could become.

The present invention is intended to solve the problems of the prior art as described above, and when the diversion design of the already designed circuit diagram is performed, the designer intends to obtain the circuit diagram information from the already designed circuit diagram. For the purpose of providing a printed circuit board circuit diagram editing method that can be used in a modified form and can input a circuit diagram reflecting circuit information of an already designed circuit without burdening the designer. There is.

[0008]

FIG. 1 shows the basic configuration of the present invention. According to the present invention, in a printed board circuit diagram editing editor for designing a printed board circuit by a computer, a diversion information table creating means 1 is provided to search the same part as the input part from an already designed circuit, and the same part and A diversion information table 15 including a diversion component table 21 in which information of peripheral components directly connected to the same component is described and a connection node information table 22 in which node information between the same component and peripheral components is described is created,
The parts list menu display means 2 is provided to display the uninput parts in the diversion parts table 21 on the parts list menu. Then, after the input components are arranged on the circuit diagram, the peripheral components are sequentially input and arranged from the component list menu.

According to the present invention, in the above invention, when a peripheral component is input, a rubber band assists the net node which is described in the connection node information table 22 and which is connected to the node between the same component and the peripheral component. It is characterized in that the peripheral parts are arranged by displaying the same.

Further, according to the present invention, in these cases, the part attributes of the part input from the part list menu are displayed, and when there is an instruction to change the part specification of the input part, input / output of the old and new parts is performed. When the number of pins is the same, the parts specifications on the diversion parts table 21 are replaced and the parts are arranged.

[0011]

The operation of the present invention will be described below with reference to the drawings. FIG. 2 shows a basic configuration example of circuit data in the circuit diagram editor used in the present invention.
In the figure, 11 is a parts table, 12 is a parts pin table,
13 is a symbol table, 14 is a symbol pin table, 15 is a diversion information table for realizing the present invention, and 16 is designed circuit information.

The parts table 11 contains a list of specifications of parts such as ICs used for circuit diagram design. The component pin table 12 has a list of pins of the components listed in the component table 11. The symbol table 13 contains a list of logical symbols of each portion that constitutes each component such as an IC. The symbol pin table 14 lists pins of each logical symbol and a list of nodes between the pins. The diversion information table 15 describes a diversion component table that indicates component information that is diverted from an already-designed circuit diagram, and a connection node information table that indicates node information regarding diversion components. The designed circuit information 16 describes a component table, a component pin table, a symbol table and a symbol pin table in the designed circuit diagram.

FIG. 3 shows an example of the structure of the diversion information table, and shows a diversion component table 21 and a connection node information table 22. The diversion component table 21 and the connection node information table 22 are created by extracting from the designed circuit information 16 when the diversion instruction for the component is given.

In the diverted parts table 21, SPEC. Showing the specifications of each part (IC) is associated with the part numbers a0 to a3. , SPEC-PTR c0 to c3 which are pointers to the parts table in the designed circuit, and CNTR- which is a pointer to the central part in the diversion parts table.
PTRa0, C0NN-PTRa1 which is a pointer to a peripheral component in the diversion component table, NEXT-PTRa2 and a3 which are next pointers when a plurality of pointers to the peripheral components exist under the parent table, and a diversion node table NODE-PTRs b0, b3, and b5, which are pointers to the connection node information in FIG. Note that NULL indicates that these pointers do not exist.

In the connection node information table 22,
PIN that is a pointer to the symbol pin in the designed circuit
-PTR d0 to d5 and next pointers NEXT-PTRb1, b2 and b4 when a plurality of pointers to connection nodes in the designed circuit exist under the parent table are described. Note that NULL indicates that these pointers do not exist.

FIG. 4 shows an example of the structure of a pre-designed circuit file in which pre-designed circuit information is described, in which a parts table 23 and a symbol pin table 24 are shown.

In the parts table 23, SPEC-
Corresponding to PTR c0 and cTR, parts (I
C) showing the specifications of SPEC. And PIN-PTRptr indicating a pointer to the symbol pin of the component in the designed circuit
And SBL-PTRptr indicating a pointer to a symbol of a component in a designed circuit.

In the symbol pin table 24, P
Corresponding to IN-PTRs d0 to d3, PINNAME1 to 4 indicating pin names and NODEptr indicating nodes.
And PPIN-PTRpt indicating a pointer to a physical pin
r is described.

The predesigned circuit file includes a component pin table, a symbol table, and a node table in addition to the above-described component table and symbol pin table.

In the following, each individual function in the present invention will be described under such a data structure. Since the present invention is a technique realized by a conversational circuit diagram editor, a command-driven processing system is therefore adopted. The following figures show the operation of the editor according to the designer's instructions.

FIG. 5 shows an example of the procedure from the instruction of the parts to the creation of the parts list menu. In the case of adding the parts to the circuit, the additional parts (hereinafter referred to as the main parts) in the designed circuit diagram are shown. The following describes a procedure for searching for the same component as that of (referred to as) and reflecting the component (hereinafter referred to as a peripheral component) connected to the central component to the component list menu.

In the parts list menu, among the peripheral parts listed in the diversion parts table in the diversion information table, those not input in the circuit diagram are displayed. As shown in FIG. 3, the diversion information table stores component specifications, pointers to reference components in the designed circuit, and pointers to symbol pins having connection nodes with the central component. This implements a search for connection information in the designed circuit for the component instructed on the component list menu.

In FIG. 5, when a component is designated, it is checked whether the designated component is of a diversion design or not. If it is not of a diversion design, the same component is searched from the already designed circuit to identify the same. When there is a part, it is reflected in the parts list menu by registering it in the diversion information table. On the other hand, when it is a diversion design, the connection parts are searched from the connection node information table, and if there is, it is reflected in the parts list menu by registering in the diversion information table. It is reflected in the parts list menu by deleting it from the diversion information table. The diversion information table is created by sequentially performing such processing for the designated parts.

FIG. 6 shows an example of the procedure of component placement from the component list menu, and shows the processing procedure at the time of diversion placement of peripheral components.

When the designer designates peripheral components in the component list menu, the designer is first presented with default (diverted source) component attribute information (component specifications, component names, etc.). As a result, if there is an instruction from the designer, the component attribute information is changed, and if there is no instruction, the symbol pin having the connection node to the central component is searched for from the diversion information table for that component and the component pin to be placed is searched. The rubber band between the pin of the central part and the ghost figure is displayed. When the layout position is instructed by the designer, the well-known automatic wiring process is performed between the positioning of the parts and the pins displayed in the rubber band.

In FIG. 6, when a part on the parts list menu is designated, a connection pin with the central part is searched from the node information in the diversion information, and a part name is presented, a ghost graphic is displayed, and a connection pin is displayed. And the rubber band display. As a result, if there is an instruction to change the component attribute, a component attribute change request described later is made, and the component name is presented again. When there is no instruction to change the component attribute, the arrangement position is instructed, the component addition or arrangement process is performed, the automatic connection process is performed, and the process proceeds to the next process.

FIG. 7 shows an example of the procedure for reflecting the information on the component list menu when changing the component attribute, and shows the process of changing the diversion information when changing the component attribute.

When changing the part specifications, if the numbers of input and output pins of the old and new parts are the same, it is considered that only the parts are changed and the circuit configuration is not changed, and only the part specifications of the diversion information table are replaced. Deal with that.

In FIG. 7, when there is an instruction to change the part attribute, it is checked whether the part specification is changed. If there is a change, it is checked whether the old and new parts have the same number of input / output pins.
If they are the same, they are reflected in the parts list menu by exchanging the parts specifications in the diversion information table.If the number of input / output pins is not the same, the old parts of the diversion information table are deleted and reflected in the parts list menu. Then, the process proceeds to the next process. If there is no change in the part specifications, the process moves directly to the next process.

By performing each of the above processes by regarding the component instructed in the process of FIG. 5 as the central component, the diversion design of the already designed circuit diagram can be performed in an arbitrary form.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 8 to 11 show a circuit diagram creation flow according to an embodiment of the present invention, in which a designer creates a circuit diagram by an interactive circuit diagram editor realized by the present invention. Is shown. 8 shows input of parts, FIG. 9 shows display of a parts list menu, FIG. 10 shows selection of peripheral parts, and FIG. 11 shows determination of arrangement and reflection on the parts list menu.

As shown in FIG. 8, when the designer inputs one of the parts as the central part together with the diversion design instruction, the name (IC3-1) and the ghost figure showing the part are displayed on the display screen. To be done.

As shown in FIG. 9, when the same component as the component input from the designed circuit diagram file is searched, peripheral components connected to this component are displayed on the component list menu.

As shown in FIG. 10, when one peripheral component (for example, LS04C-G) to be arranged next is selected from the component list menu, the default setting information (IC4-2OK?) Of the component attribute information is displayed and , The ghost graphic of the selected part is displayed, and the center part (I
A rubber band line is displayed following the pin of C3-1). When changing the component attribute information, the designer gives the instruction, and when not changing, the layout position can be freely designated.

In FIG. 11, peripheral parts (IC4-2)
When the layout of the central component (IC3-1) is determined, automatic connection is executed, and the component (L
S04C-G) is deleted from the parts list menu.
Then, a new component (HC00P) connected to the arranged peripheral component (IC4-2) is added and reflected and displayed on the component list menu.

Thereafter, until the end instruction is given, the component input and the arrangement are repeatedly executed according to the flow of FIGS.

FIG. 12 shows a hardware configuration of an embodiment of the present invention, in which 31 is a central processing unit (C
PU), 32 is a bus connecting the CPU 31 and each unit, 33
Is a memory such as a RAM, 34 is a secondary storage device such as a hard disk, 35 is a display for visual display, 36 is a keyboard as an input device, and 37 is a mouse as an input device.

In FIG. 12, the CPU 31 uses the bus 32.
The control necessary for executing the function of the circuit diagram editing editor is performed by using the program, the execution environment, the editing circuit data, etc. stored in the memory 33 connected via. At this time, the library, the design circuit file, etc. stored in the secondary storage device 34 are read out as needed and used. The display 35 displays various tables, circuit diagrams, parts list menus, and the like, and enables interactive circuit diagram editing. The operator can input a required command via the keyboard 36 or the mouse 37.

The user uses the hardware configuration of the embodiment shown in FIG. 12 to execute the circuit diagram input procedure shown in FIGS. 8 to 11, for example, to obtain a circuit diagram from the designed circuit diagram. The information can be diverted in a form intended by the designer to edit the printed circuit board circuit diagram or the like.

[0040]

As described above, according to the present invention, when designing a printed circuit board circuit diagram using a computer, the printed circuit board circuit diagram can be designed based on the free intention of the designer without any burden on the designer. The circuit design can be performed by utilizing the circuit diagram information. At this time, since the design work can be performed while confirming the connection information between the respective parts on the circuit diagram, it is possible to perform a standard circuit design with few mistakes.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention.

FIG. 2 is a diagram showing a basic configuration example of circuit data in a circuit diagram editor used in the present invention.

FIG. 3 is a diagram showing a configuration example of a diversion information table.

FIG. 4 is a diagram showing a configuration example of a predesigned circuit file in which predesigned circuit information is described.

FIG. 5 is a diagram showing an example of a procedure from a part instruction to a part list menu creation.

FIG. 6 is a diagram showing an example of a procedure of component placement from a component list menu.

FIG. 7 is a diagram illustrating an example of a procedure of reflecting a component list menu when a component attribute is changed.

FIG. 8 is a diagram showing input of components in the circuit diagram creation flow according to the embodiment of the present invention.

FIG. 9 is a diagram showing display of a parts list menu in the circuit diagram creation flow according to the embodiment of the present invention.

FIG. 10 is a diagram showing selection of peripheral components in the circuit diagram creation flow according to the embodiment of the present invention.

FIG. 11 is a diagram showing layout determination and reflection in a parts list menu in the circuit diagram creation flow according to the embodiment of the present invention.

FIG. 12 is a diagram showing a hardware configuration of an example of the present invention.

[Explanation of symbols]

 1 diversion information table creating means 2 parts list menu display means 15 diversion information table 21 diversion parts table 22 connection node information table

Claims (3)

[Claims] 1. A printed board circuit diagram edit editor for designing a printed circuit board by a computer, searches the already designed circuit for the same parts as the input parts, and the same parts and peripheral parts directly connected to the same parts. Information part (21) describing the information of the connection part and the connection node information table (2) describing the node information between the same part and peripheral parts.
The diversion information table creating unit (1) that creates the diversion information table (15) including the item (2), and the parts list menu display unit (N) that displays the uninput parts in the diversion parts table (21) on the parts list menu ( 2) is provided, and the input components are arranged on the circuit diagram, and then the peripheral components are sequentially input and arranged from the component list menu and arranged. 2. When inputting the peripheral component, the peripheral component is supplementarily displayed by a rubber band on the same component in the connection node information table (22) and a net node having the same connection as the node between the peripheral components. 2. The printed circuit board circuit diagram editing method according to claim 1, further comprising: 3. When the component attributes of a component input from the component list menu are displayed, and when there is an instruction to change the component specifications of the input component, the number of input / output pins of the old and new components is the same. 3. The printed circuit board circuit diagram editing method according to claim 1, wherein the component specifications on the diverted component table (21) are replaced and the components are arranged.