Wiring CAD apparatus

• US 5,642,286 A
• Filed: 06/30/1995
• Issued: 06/24/1997
• Est. Priority Date: 11/30/1994
• Status: Expired due to Term

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yamashita, Yasuhiro, Nishimura, Masaharu, Yamada, Ryoji, Iida, Kazuyuki
• Primary Examiner(s): RUGGIERO, JOSEPH F
• Application Number:
  US08/497,550
• Time in Patent Office: 725 Days
• Field of Search: 364/468.03, 364/468.04, 364/468.28, 364/474.24, 364/488, 364/489, 364/490, 364/491
• US Class Current: 700/97
• CPC Class Codes: G06F 30/394 Routing G06F30/396 takes precedence

Abstract

A wiring CAD apparatus wherein a situation of a noticed event can be identified at a moment on a screen. The wiring CAD apparatus comprises a searching timing detection section for detecting a new displaying processing/deletion processing timing as a searching timing for a non-wired pin, a non-wired pin searching section operable in response to the searching timing detected by said searching timing detection section for searching the non-wired pin, and a display data production section for producing display data in accordance with which the non-wired pin searched out by said non-wired pin searching section is to be displayed on a display section in a visually distinguishable condition from another already wired part pin. The display data produced by said display data production section is displayed on the display section under the control of a displaying control section. The wiring CAD apparatus can be applied to a CAD system with which wiring designing for an LSI, an MCM, a PWB or the like can be performed interactively.

Claims

1. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a searching timing detection section for identifying a searching timing for a non-wired pin which is a part pin not wired on the wiring design, the searching timing being one of a new displaying processing timing at which a new wiring design is to be displayed on said display section and a deletion processing timing at which part of the current wiring design displayed on said display section is to be deleted;

a non-wired pin searching section operable in response to the searching timing for identifying the non-wired pin on the wiring design object from among the display data; and

a display data production section for producing display data for displaying the identified non-wired pin on said display section in a visually distinguishable condition from another already wired part pin;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

2. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a non-connected pattern searching section for identifying, from among the display data, a non-connected pattern which is a wiring pattern not connected to any element on the wiring design; and

a display data production section for producing display data for displaying the identified non-connected pattern on said display section in a visually distinguishable condition from any other wiring pattern;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

3. The wiring CAD apparatus as claimed in claim 2, wherein said display data production section produces display data for displaying a mark clearly indicating an end of the identified non-connected pattern on said display section at each of the opposite ends of the non-connected pattern.

4. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a non-wired pattern searching section for identifying, from among the display data to said display section, a non-wired pattern which is a wiring pattern which forms a non-wired interval on the wiring design; and

a display data production section for producing display data for displaying a line interconnecting an end of the identified non-wired pattern and a part pin to which the non-wired pattern is to be connected is to be displayed on said display section;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

5. The wiring CAD apparatus as claimed in claim 4, wherein said display data production section produces display data for displaying a mark clearly indicating an end of the identified non-wired pattern at the end of the non-wired pattern.

6. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section; and

a display data production section for producing display data for displaying a wiring design condition of each of the plurality of layers which are to be displayed at positions displaced from each other, to allow wiring design conditions of a plurality of layers to be displayed simultaneously in a hierarchically overlapping relationship on said display section;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

7. The wiring CAD apparatus as claimed in claim 6, further comprising a hierarchic displaying order designation section for designating a hierarchic displaying order of the wiring design conditions of the plurality of layers, said display data production section producing display data in accordance with the hierarchic displaying order designated by said hierarchic displaying order designation section.

8. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a position information calculation section operable when adding a wiring pattern to the wiring design displayed, said position information calculation section calculating position information of a start point and an end point of the wiring pattern and position information of a pointer displayed on said display section to designate the position at which the wiring pattern is to be arranged; and

a display data production section for producing, based on the position information of the start point an the end point of the wiring pattern and the position information of the pointer calculated by said position information calculation section, display data of a rubber band by which an interval from the start point of the wiring pattern to the position of the pointer can be connected and another rubber band by which another interval from the position of the pointer to the end point of the wiring pattern can be connected;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

9. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a processing object network searching section operable when adding a wiring pattern to the wiring design displayed on said display section and when deleting part of the wiring design displayed on said display section, said processing object network searching section identifying a processing object network including a processing start point designated by a pointer displayed on said display section from among the display data; and

a display data production section for producing display data for displaying the processing object network identified by said processing object network searching section on said display section in a visually distinguishable condition from any other network;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

10. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a position information calculation section operable when deleting part of the wiring design displayed on said display section, said position information calculation section calculating position information of a deletion start point designated by a pointer displayed on said display section and position information of the pointer and calculating a position which is nearest to the position of the pointer on a deletion object network including the deletion start point as deletion end point candidate position information; and

a display data production section for producing, based on the position information of the deletion start point, the position information of the pointer and the deletion end point candidate position information calculated by said position information calculation section, display data of a rubber band which is to be displayed as extending from the position of the deletion start point to the position of the pointer past the deletion end point candidate position;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

11. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a position information calculation section operable when adding a wiring pattern to the wiring design displayed on said display section, said position information calculation section calculating position information of a wiring start point designated by a pointer displayed on said display section and position information of the pointer;

a wiring determination section for successively determining, based on the position information of the wiring start point and the position information of the pointer calculated by said position information calculation section, whether a wiring line between the position of the wiring start point and the position of the pointer can be wired;

an obstructing factor searching section operable when it is determined by said wiring determination section that it is impossible to wire a wiring line between the position of the wiring start point and the position of the pointer for identifying the position of an obstructing factor at which the wiring is disabled; and

a display data production section for producing, based on the position information of the wiring start point and the position information of the pointer calculated by said position information calculation section, display data of a rubber band by which an interval from the wiring start point to the position of the pointer can be connected and for producing, when it is determined by said wiring determination section that it is impossible to wire a wiring line between the position of the wiring start point and the position of the pointer, display data for displaying a portion of the rubber band extending from the position of the obstructing factor, searched out by said obstructing factor searching section, to the position of the pointer in a visually distinguishable condition from the other portion of the rubber band extending from the position of the wiring start point to the position of the obstructing factor;

the display data produced by said display data production section being displayed on said display section via said displaying control section.

12. A wiring CAD apparatus, comprising:

a display section for interactively displaying a wiring design based on display data;

a displaying control section for controlling said display section;

a position information calculation section operable when adding a wiring pattern to the wiring design displayed on said display section, said portion information calculation section calculating position information of a wiring start point and position information of a wiring end point designated by a pointer displayed on said display section;

a wiring determination section for determining, based on the position information of the wiring start point and the position information of the wiring end point calculated by said position information calculation section, whether a wiring line between the position of the wiring start point and the position of the wiring end point can be wired;

an obstructing factor searching section for identifying, when it is determined by said wiring determination section that it is impossible to wire a wiring line between the wiring start point and the wiring end point, the position of an obstructing factor which renders the wiring impossible; and

a display data production section for producing display data for displaying the position of the obstructing factor identified by said obstructing factor searching section clearly;

the display data produced by said display data production section being displayed on said displayed section via said displaying control section.