JPH05314220A - Wiring processing system - Google Patents

Abstract

PURPOSE:To eliminate the need for repeatedly performing a wiring processing and the other processing of a cross talk check by performing the cross talk check at a real time in the case of adding any line segment. CONSTITUTION:In the case of adding any line segment at the time of interactive wiring layout, first of all, the designated line segment is virtually generated from an input 21. Then, the crosstalk applied from a net belonging to the virtually generated line segment to the other already wiring laid network is calculated at every network and stored in a memory 22 and similarly, the crosstalk received from the other already wire laid network is calculated at every network and stored in a memory 23. Then, the crosstalk is extracted at every network from the memories 22 and 23, the maximum crosstalk is selected and it is judged whether the selected maximum crosstalk exceeds an allowable range designated beforehand or not. When the crosstalk exceeds the allowable range, it is judged whether the virtually generated line segment is added or abandonned and if a checking mode is turned on, the virtually generated line segment is erased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring processing system,
In particular, the present invention relates to a wiring processing method for a PWB, an LSI, etc. using a graphic function.

[0002]

2. Description of the Related Art In the conventional wiring processing method, crosstalk check is performed in batch after the wiring processing is completed, and there is no interactive wiring processing method in consideration of crosstalk.

[0003]

The above-described conventional wiring processing method is such that the crosstalk check is performed after the wiring processing is completed.
This is done in batches, and if there is an error in the batch crosstalk check, it is necessary to re-enter the wiring process and correct the wiring. Further, it was not possible to know whether the corrected result was an error or not without performing batch crosstalk check after the wiring process was completed.

[0004]

According to the wiring processing method of the present invention, a means for virtually generating one line segment designated by an interactive wiring design and a net to which the virtually generated line segment belongs are other already-routed nets. , A method for obtaining the crosstalk given to the virtual generated line segment from other already-routed nets, and a means for selecting the maximum crosstalk among the obtained crosstalks. A means to determine whether the maximum crosstalk exceeds the preset allowable range, and a check mode that specifies whether to add or discard a line segment that virtually occurs when the maximum crosstalk exceeds the preset allowable range. Means, a means for erasing a virtually generated line segment when the check mode is on, and a crossing that exceeds the allowable range when the check mode is off. A means for highlighting an already-routed net that has been marked with an error color, and a means for highlighting with an error color a virtual net that belongs to a line segment that has exceeded the allowable range and adding it Is configured.

[0005]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a flow chart showing an embodiment of the wiring processing method of the present invention. As shown in FIG. 1, in the interactive wiring design, when adding a line segment, first, the process 1
Then, the line segment designated from the input 21 is virtually generated.
Then, in process 2, the nets belonging to the line segment virtually generated in process 1 determine the crosstalk to be given to other already-routed nets for each net and store it in the memory 22. Similarly, in process 3, the nets belonging to the line segment virtually generated in process 1 receive crosstalk received from other already-routed nets for each net and store the crosstalk in the memory 23.

Next, in process 4, the memory 22 and the memory 23 are stored.
Take out the crosstalk for each net and select the maximum one. Further, in the judgment 5, it is judged whether or not the maximum crosstalk selected in the processing 4 exceeds the allowable range designated in advance. If the result of judgment 5 is outside the allowable range (Y), then in judgment 6, a check mode is designated to specify whether to add or discard the virtually generated line segment in process 1. If the check mode is ON according to the judgment 6, the virtually generated line segment is erased in the process 13.

On the other hand, if the check mode is off in the decision 6, the crosstalk given to the already-wired net is taken out from the memory 22 in the decision 7 and it is checked whether or not all the crosstalks have been processed. If it is not the end (N), it is judged in the judgment 8 whether or not the crosstalk of each net exceeds the predetermined allowable range. When the net exceeds the allowable range (Y), the existing wiring is changed to an error color in the process 9 and the net is output to the display 24. In decision 8, nothing is done for the (N) net that does not exceed the allowable range.
In judgment 7, it is judged whether or not the processing has been performed for all the crosstalks taken out from the memory 22, and if all the crosstalks have already been processed (Y), the procedure moves to judgment 10.

Next, in decision 10, the crosstalk received from the already-wired net is extracted from the memory 23, and it is determined whether or not there is any crosstalk exceeding the allowable range. If there is at least one exceeding the allowable range (Y), the process goes to the process 11, the error color is set to the line segment virtually generated by the process 1 in the process 11, and the process 12 is performed. Further, in the judgment 10, if none of them exceeds the allowable range (N), the process goes directly to the process 12. Even if the maximum crosstalk does not exceed the permissible range in the judgment 5 (N), the process goes to the process 12.

Then, in process 12, the line segment virtually generated in process 1 is added and output to the display 24.

[0010]

As described above, according to the wiring processing method of the present invention, in the interactive wiring design, a crosstalk check is performed in real time when a line segment is added, so that the wiring processing and the cross processing are performed. This has the effect of eliminating the need to repeatedly perform another process called talk check.

Further, in the wiring processing method of the present invention, when the check mode is ON, the line segment that causes an error is erased. Therefore, the line segment that causes an error does not always exist, and even when the check mode is OFF, the error color is emphasized. Since it is displayed, it has an effect that the error line segment can be seen at a glance.

[Brief description of drawings]

FIG. 1 is a flow chart showing an embodiment of a wiring processing system of the present invention.

[Explanation of symbols]

 21 Input 22, 23 Memory 24 Display

Claims (1)

[Claims] 1. A means for virtually generating one line segment specified by an interactive wiring design, a means for obtaining crosstalk given to another already-wired net by a net to which the virtually generated line segment belongs, and a virtual generation. A means for obtaining the crosstalk that the net to which the line segment belongs receives from other already-routed nets, a means for selecting the maximum crosstalk among the obtained crosstalks, and an allowable range in which the selected maximum crosstalk is designated in advance. A means to determine whether or not it exceeds, a means to determine the check mode that specifies whether to add or discard the virtually generated line segment if it exceeds the allowable range, and a virtual generation when the check mode is on. The means for erasing the line segment that has been Considering crosstalk, which has means for highlighting and means for highlighting and adding with an error color when a net to which a virtually generated line segment belongs exceeds a permissible range Interactive wiring processing method.