JPH04107783A - Circuit diagram input method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is based on computer aided
Regarding the circuit diagram input method using a circuit diagram input device using
The present invention relates to a circuit diagram input method that allows various circuit diagrams to be created without re-inputting even when the names and shapes of logical symbols are different.

[Prior Art] In recent years, in order to make LSI design more efficient, circuit information has been input using a circuit diagram input device using CAD.

In such equipment, logic symbols generally have different names and shapes depending on the various devices and manufacturers, so if the names and shapes of logic symbols are different between manufacturers, it is necessary to re-enter them each time the manufacturer or device changes. Work needs to be done.

Recently, in order to improve the inconvenience due to user requests, a logic synthesis system has been developed that has a device that allows each company to use symbols with the same symbol name and shape, and adds each company's data during simulation. has been done.

However, in such a device, there is no flexibility in the types of logical symbols, and no consideration is given to symbols whose names change depending on each company and device.

Regarding conventional LSI design technology, see, for example, "Electronic Information and Communication Handbook," edited by the Institute of Information and Communication Engineers (1991).
88), I) I), 849-868''.

[Problem to be solved by the invention]

In the above conventional technology, if the symbol name and shape are to be the same, the symbol name must be standardized for all devices and the entire company, and all symbols must be prepared for all devices and the entire company. In addition, symbols with different specifications that are thinner than that are
It cannot be created based on the judgment of a single company; all devices from all companies must be on the same page depending on the system manufacturer's response.

Furthermore, since each system is independent, only devices from manufacturers and companies that support the system can be migrated.

For example, L for specific applications that tend to produce a wide variety of products in small quantities.
SI (ASIC: application 5pe
cific IC) development, it is difficult to switch to a standard manufacturer once the J manufacturer is selected due to differences in symbol shapes and symbol names between manufacturers.

The purpose of the present invention is to improve these problems and automatically convert a circuit diagram input once to a circuit diagram suitable for each company and device, even if the names and shapes of logic symbols vary depending on the device type and manufacturer. An object of the present invention is to provide a circuit diagram input method that can be changed automatically and eliminates the need for re-input work that has conventionally been performed every time a manufacturer or device changes.

[Means to solve the problem]

In order to achieve the above object, the circuit diagram input method of the present invention includes:
If the name and shape of a logic symbol differs depending on the type of device or manufacturer, the device name and symbol name for the logic symbol are associated with each other and stored in memory, and this association can be used to create only the symbol name without changing the logic. The feature is that a desired circuit diagram can be created by simply changing the symbol name without changing the symbol shape.

In addition, if there is no symbol name corresponding to the desired logic, an attribute as a block is added to the corresponding logic symbol, and as a lower layer, a symbol possessed by the device of the manufacturer based on the logic of the symbol name. The feature is that a circuit diagram is created and registered in memory as an equivalent block, and when the symbol name is a logic that the device of the manufacturer does not have, an equalization block is used instead.

[Effect]

In the present invention, logical symbols are prepared for each company and each device as shapes based on certain rules, and by means of device/symbol name association/retention means, when the symbol name differs between each company and each device, The correspondence between which symbol name corresponds to which symbol name is input and stored in memory.

Then, the symbol name conversion means converts the circuit diagram to another company's circuit diagram using the corresponding symbol name without changing the symbol shape, using the correspondence relationship held in the memory.

In addition, by using the equivalent block and circuit creation/registration means, it is possible to create a symbol name (logic) owned by another manufacturer, etc. that can be substituted for logic that is not present in the device of the manufacturer with a block and an equivalent low-level circuit in the lower layer. and register it in memory.

By using these functions, you can easily transfer complex logic symbols from one manufacturer to other devices or other companies without having to re-enter them.
It is possible to eliminate symbols (logic) that cannot be converted.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram of a circuit diagram input device according to an embodiment of the present invention, and FIG. 3 is a functional block diagram of a circuit diagram input device according to an embodiment of the present invention.

In FIG. 2, 21 is a data processing unit, 22 is a mouse,
23 is a keyboard, 24 is a memory, and 25 is a drawing display section.

Further, in FIG. 3, 211 is a device/symbol name association/holding means, 212 is a symbol name conversion means, and 2
13 is equivalent block and circuit creation/registration means.

This device/symbol name association/holding means 211 normally uses the keyboard 23, mouse 22
etc., to input which symbol name corresponds to which symbol name, and store it in the memory 24 as a table.

Further, the symbol name conversion means 212 can convert the device/symbol name correspondence/retention means 21 without changing the symbol shape.
The corresponding symbol name held in step 1 is used to convert to another company's circuit diagram.

In addition, the equivalent block and circuit creation/registration means 213
A symbol name (logic) owned by another manufacturer or the like is created so that logic that is not present in the device of the manufacturer can be substituted with a block and an equivalent circuit in a lower hierarchy, and this is registered in the memory 24.

FIG. 1 is a flowchart showing a circuit diagram input method in an embodiment of the present invention.

In this embodiment, with the configuration shown in FIGS. 2 and 3, first, the manufacturer name, device name, etc. of the conversion destination are set (101), and the circuit diagram that is the conversion source is specified (102).

Next, get the first symbol name from the circuit diagram.
03), it is checked whether there is a symbol name corresponding to the manufacturer to be converted (104).

As a result, if there is no corresponding symbol name, step 1
Proceed to 08.

Further, if there is a corresponding symbol name, the symbol name is converted to the symbol name of the manufacturer (105), and it is checked whether there is the next symbol (106).

As a result, if there is no next symbol, the process ends.

Furthermore, if there is a next symbol, the symbol name is acquired from the circuit diagram (107), and the process returns to step 104.

Further, in step 108, it is checked whether a block equivalent to the target symbol and a lower layer circuit diagram have already been registered.

As a result, if it has not been registered yet, a message will be output to the user to inform the user that there is no equivalent block (111
), the main layer circuit can be an equivalent block,
After creating the symbol of the device of the specified manufacturer (112) and registering it, the process proceeds to step 109.

If it is registered, convert the symbol name to an equivalent block name (109), change the parameter of the symbol to a block indicating that it has a lower hierarchy (110), and proceed to step 1066. According to the present invention, in the method of claim 1, various circuit diagrams can be created without re-inputting by automatically creating circuit diagrams that are suitable for each company and each device from a circuit diagram that has been input once. can do.

In addition, in the method of claim 2, although there are many types of symbols depending on manufacturers and devices, there is no inconvenience such as using only shared symbols (logic) in consideration of migration, and symbols with complex functions are used. You can freely use it to create circuit diagrams.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing a circuit diagram input method according to an embodiment of the present invention, FIG. 2 is a block diagram of a circuit diagram input device according to an embodiment of the present invention, and FIG. 3 is a circuit diagram according to an embodiment of the present invention. It is a functional block diagram of a figure input device. 21: data processing unit, 22: mouse, 23: keyboard, 24: memory, 25: drawing display unit, 211: device/symbol name association/holding means. 212: Herring name conversion means; 213: equivalent block and circuit creation/registration means; Figure Figure

Claims (2)

[Claims] (1) In the circuit diagram input method when the names and shapes of logic symbols differ depending on the device type and manufacturer, the device name and symbol name for the logic symbol are maintained in correspondence, and this association allows the logic to remain unchanged. A circuit diagram input method characterized by converting only symbol names into , and creating a desired circuit diagram only by changing symbol names without changing symbol shapes. (2) In the above circuit diagram input method, if there is no symbol name corresponding to the desired logic, create the corresponding logic symbol as a block, create a circuit diagram with the logic of the symbol name as a lower layer, and create an equivalent 2. The circuit diagram input method according to claim 1, wherein the equivalent block is substituted for logic that is registered as a block and whose symbol name is not registered.