JPH05242202A - Wiring design support device - Google Patents

Abstract

PURPOSE:To prevent input of wiring patterns except in a designated connection order by using a rat's nest to guide a user on a picture in the connection order of single-stroke signal lines at the time of input of wiring patterns. CONSTITUTION:A logical connection information extracting part 12 extracts single-stroke signal line designating information and connection designating information of connection pins with respect to a single-stroke signal line simultaneously with extraction of logical connection information from inputted circuit diagram information. Extracted information are stored in a logical connection information storage area 17 from an arranged wiring data control part 15. The logical connection information storage area 17 is retrieved by the arranged wiring data control part 15 to store the single-stroke signal line name and the connection order of its connection pins in a single-stroke signal line storage area 19. Single-stroke wiring processing is performed by the arranged wiring data control part 15 in following processings. In this case, lines (rat's nest) indicating connection between pins is displayed on the picture of a wiring pattern input part 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the design of printed boards and ceramic boards, and more particularly to a wiring design support device.

[0002]

2. Description of the Related Art A conventional wiring design support device of this type is EW
When the wiring design data of the printed circuit board is displayed on the screen such as S and the operator graphically inputs the wiring data,
Even if the connection order is specified in the case of single-stroked wiring, the same display as for general wiring is displayed.Therefore, the operator should check the connection order of component pins in advance and enter it while comparing it with the wiring data on the screen. Was there.

[0003]

In the above-described conventional wiring design support apparatus, when the connection order is designated by the one-stroke writing wiring, the operator first names the component pin to be connected in advance for the one-stroke writing wiring signal before inputting. However, there was a problem that we had to check the position and connection order. In addition, when actually designing the wiring on the screen, there is a problem that the component pin that was previously checked must be searched from the screen, and it is not guaranteed that the connection order of the input wiring pattern is correct. There was a problem.

[0004]

According to the wiring design support apparatus of the present invention, in the wiring pattern design of a printed circuit board or a ceramic substrate, when a circuit diagram is input, a single-stroke signal line instruction and a connection order of this signal line are indicated. And an information input means for inputting component wiring information, and a wiring pattern input, the ratt nest (the straight line indicating the pin to be connected and the pin to be connected) It is provided with a guiding means for guiding by using and an output means for outputting the wiring pattern information inputted by the information inputting means to an external file.

[0005]

In the present invention, the connection order of the one-stroke writing signal lines is guided by using the ratsnest on the screen when the wiring pattern is input.

[0006]

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, reference numeral 11 is a circuit diagram input section, and this circuit diagram input section 11 constitutes an instruction means for instructing a one-stroke writing signal line and an instruction of a connection order of this signal line when a circuit diagram is input. .. Reference numeral 12 is a logical connection information extraction unit that receives the output of the circuit diagram input unit 11, 13 is a component placement input unit, and this component placement input unit 13 constitutes information input means for inputting component placement information.

Reference numeral 14 denotes a wiring pattern input section, which constitutes a guiding means for guiding the designated connection order of the one-stroke writing signal line by using a rat's nest when the wiring pattern is inputted. Reference numeral 15 is a placement and routing data control unit, and the placement and routing data control unit 15 constitutes an output unit for outputting the wiring pattern information input by the information input unit to an external file. Reference numeral 16 is a parts library, 17 is a logical connection information storage area, 18 is a placement / wiring information storage area, 19 is a one-stroke writing signal line storage area, and 20 is a wiring data file.

As described above, the wiring design support apparatus according to the present invention has the circuit diagram input unit 11, the logical connection information extraction unit 12, the component placement input unit 13, the wiring pattern input unit 14, the placement and routing data control unit 15, and the logical connection. It is composed of an information storage area 17, a layout / wiring information storage area 18 and a one-stroke writing signal line storage area 19, and circuit diagram information, component placement information, T / H (through hole) lands for each component, and the position and size of a component mounting pad. The component library 16 in which is described is input, and after the processing described below is performed, the wiring data file 20 is output to the outside.

2 and 3 are flow charts showing the processing method of the apparatus according to the present invention for explaining the operation of FIG. FIG. 4 is an explanatory diagram showing an example of one-stroke writing wiring, and FIG. 5 is an explanatory diagram showing an example of a screen display of the wiring pattern input unit 14 in FIG.

The operation of the embodiment shown in FIG. 1 will be described below with reference to FIGS. First, when a circuit diagram is drawn from the circuit diagram input unit 11 of FIG. 1 in the processing step 101 of FIG. 2, a one-stroke writing signal line is designated and a connection order of connection pins of this signal line is specified. Next, processing step 1
In step 02, the logical connection information extracting unit 12 extracts the logical connection information from the circuit diagram information input in the processing step 101, and simultaneously extracts the one-stroke writing signal line designation information and the connection pin connection order designation information for the one-stroke writing signal line. To do.

Then, the logical connection information extracted in the processing step 103, the one-stroke writing signal line designation information and the connection order designation information of this signal line are stored in the logical connection information storage area 17 from the placement and wiring data control unit 15. Next, in processing step 104, the position of the mounted component on the wiring board area is designated by the component placement input unit 13. At that time, the position of the T / H (through hole) land for each component is referred to, and in the case of a surface mount component, the component library 16 specifying the component mounting pad is referred to.

Next, in process step 105, the placement and routing data control unit 15 stores the component placement information input from process step 104 in the placement and routing information storage area 18. In processing step 106, the layout and wiring data control unit 15 searches the logical connection information storage area 17, and stores the one-stroke writing signal line name and the connection order of the connection pin in the one-stroke writing signal line storage area 19.

Then, the placement / wiring data control unit 15 carries out a one-stroke writing wiring process from the subsequent processes. First,
In process step 107, one stroke-writing signal line name is retrieved from the stroke-writing signal line storage area 19. Next, in the processing step 108, the wiring pattern input unit 14 clearly indicates the source pin of the one-stroke writing signal line extracted. Then, the connection order counter n of the one-stroke writing signal line extracted in the processing step 109 is set to zero. Here, n = 0 means a source pin. In processing step 110, a straight line (rats nest) indicating that the n-th pin and the (n + 1) -th pin of this signal line are connected is displayed on the screen of the wiring pattern input unit 14.

At the processing step 111, the nth nth is seen while observing the rat's nest displayed on the screen of the wiring pattern input section 14.
The operator draws the wiring pattern between the pin #n and the pin n + 1, and the wiring pattern information is stored in the placement / wiring information storage area 18. FIG. 5 shows an example of a screen display of the wiring pattern input unit 14. When n = 0, the ratsnest of is displayed, and when n = 1, the ratsnest of is displayed.
A rat's nest of is displayed each time is incremented.

Next, in a decision step 112, it is checked whether or not the nth pin and the n + 1th pin are connected by a wiring pattern, and if they are connected, a processing step 113 displays between the nth pin and the n + 1th pin. Erase the rat's nest that had been done. Then, in processing step 114, the connection order counter n of the one-stroke writing signal line is incremented,
In the judgment step 115, it is checked whether n + 1 exceeds the connection order of the termination pin of the one-stroke writing signal line, and until it exceeds the processing step
The determination step 115 is repeated from 10. When this judgment step 115 becomes true, it is checked in the next judgment step 116 whether the previous one-stroke writing signal line memory area is empty, and the processing steps 107 to 116 are repeated until it becomes empty.

As described above, when the wiring pattern of the one-stroke writing signal line designated on the circuit diagram is input, the remaining general signal lines are wired, and the wiring pattern information is stored in the layout / wiring information storage area 18. To store. Then, in the next processing step 118, the wiring pattern information of all the signal lines is taken out from the placement / wiring information storage area 18 and output to the outside as a wiring data file 20. FIG. 4 is an example of the wiring pattern of the one-stroke writing signal line created by the above processing.

[0017]

As described above, the present invention guides the connection order of the one-stroke writing signal line on the screen by using ratsnest when the wiring pattern is input, so that the connection order other than the connection order designated by the operator can be obtained. It prevents inputting of wiring patterns and guides from the device side, so the operator can check the number of signal lines written in one stroke, their connection order and the position of component pins in advance. There is an effect that can be made unnecessary.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing method of the apparatus according to the present invention, which is used for explaining the operation of FIG.

3 is a flowchart showing a processing method of the apparatus according to the present invention, which is used for explaining the operation of FIG.

FIG. 4 is an explanatory diagram showing an example of one-stroke writing wiring used to explain the operation of FIG. 1;

5 is an explanatory diagram showing an example of a screen display of a wiring pattern input unit in FIG.

[Explanation of symbols]

 11 Circuit Diagram Input Section 12 Logical Connection Information Extraction Section 13 Component Placement Input Section 14 Wiring Pattern Input Section 15 Placement and Wiring Data Control Section 16 Component Library 17 Logical Connection Information Storage Area 18 Placement and Wiring Information Storage Area 19 One-stroke Writing Signal Line Storage Area 20 Wiring data file

Claims (1)

[Claims] 1. When designing a wiring pattern on a printed circuit board or a ceramic substrate, when a circuit diagram is input, an instruction means for instructing a one-stroke signal line and an instruction for connecting the signal line, and information for inputting component placement information. Input means, guide means for guiding the specified connection order of the one-stroke writing signal line using rat's nest when inputting the wiring pattern, and output for outputting the wiring pattern information input by the information input means to an external file A wiring design support device comprising means.