CN105930554A - Allegro based fly line automatic layering method - Google Patents

Abstract

The invention discloses a method for automatic layering of flying wires based on Allegro, which belongs to the technical field of computer applications; the invention uses the extended Skill interface provided by Allegro software to edit the database, and according to the difference and importance of circuit board signal lines According to the degree of layering, the wiring is carried out according to the requirements of the actual circuit board to avoid the crossing of the lines and the situation of holding the wires. Use this layering method as a reference to connect the lines, so as to realize some functions that are not provided by the program and improve the efficiency of the Layout work. Efficiency, effectively solve the problem of wire holding caused by too many flying wires, facilitate the planning of engineers before routing, save time, improve work efficiency, and reduce unnecessary repetitive work.

Description

A method for automatic layering of flying wires based on Allegro

technical field

The invention discloses an Allegro-based method for automatic layering of flying wires, which belongs to the technical field of computer applications.

Background technique

With the development of electronic technology, people have higher and higher requirements for signal integrity. From DDR2 to DDR3, to today's DDR4, from PCI to PCIE, the signal function is continuously strengthened, and the complexity of the circuit board follows. The correct connection of numerous and intricate signal lines will increase the workload of many engineers more than ever. Layering signal lines can properly simplify the complexity of signal lines, but the current Candence software can only display flying lines, but cannot layer them, and manual layering is often error-prone and wastes a lot of time. Allegro is a PCB design routing tool. Allegro provides a good and interactive working interface, combined with Cadence, it can provide complex PCB design routing solutions. The Constraint Manger in the software provides a concise and clear interface for users to set and view Constraint declarations. In the Allegro working environment, it automatically processes and checks according to the rules when placing parts and wiring. Allegro also has automatic push and wire sticking hug routing and perfect automatic line repair functions, which can provide multiple users to process a complex board at the same time.

The present invention provides a method for automatic layering of flying wires based on Allegro. Using the extended Skill interface provided by Allegro software, the database is edited and layered according to the difference and importance of circuit board signal lines, combined with the actual circuit According to the requirements of the board, it is necessary to carry out wiring and routing to avoid crossing of lines and the situation of suffocating lines. Use this layered method as a reference to carry out wiring, so as to realize some functions that are not provided by the program, improve the efficiency of Layout work, and effectively solve problems caused by too many flying lines. It often causes the problem of wire holding, which is convenient for engineers to plan before routing, saves time, improves work efficiency, and reduces unnecessary repetitive work.

Contents of the invention

Aiming at the problems of the prior art, the present invention provides a method for automatic layering of flying lines based on Allegro, and uses the extended Skill interface provided by Allegro software to edit and operate the database, thereby realizing functions not provided by some programs and improving Layout work efficiency.

The concrete scheme that the present invention proposes is:

A method for automatic layering of flying lines based on Allegro, PCB wiring through Allegro software, using the skill program of the Allegro software interface and forming automatic layering of flying lines according to the skill program: configure allegro.men in the menu bar of Allegro software The preset path of the file, add the corresponding command item to form the automatic layering of the flying line in the toolbar item, add the command code for forming the automatic layering of the flying line to the allegro.ilinit file under the skill file path, and it will form The flying line automatic layering file is placed under the skill file path to complete the command of forming the flying line automatic layering in the menu bar.

According to the command item that forms the automatic layering of flying lines, import the schematic diagram and structure diagram into Allegro, set the layer, and layer the flying lines.

Before setting the layer, check each signal line in the circuit board based on the schematic diagram, judge the type of the signal line, check whether the flying lines cross, and layer the flying lines.

Based on the schematic diagram, detect each signal line in the circuit board to determine whether the signal line is a high-speed line. If so, continue to determine whether it is a data line, otherwise, perform surface connection. Set it on the same layer, otherwise it may not be on the same layer, continue to judge whether the flying lines of the data lines on the same layer cross, if so, change the layer, otherwise connect according to the flying lines.

The benefits of the present invention are:

The present invention provides a method for automatic layering of flying lines based on Allegro, PCB wiring is carried out through Allegro software, and the skill program of the Allegro software interface is used to form automatic layering of flying lines according to the skill program: configure in the menu bar of Allegro software The preset path of the allegro.men file, add the corresponding command item to form the automatic layering of the flying line in the toolbar item, and add the command code for forming the automatic layering of the flying line to the allegro.ilinit file under the skill file path , put the formation of flying line automatic layering file under the skill file path to complete the command of forming flying line automatic layering in the menu bar;

Utilize the method of the present invention, utilize the extended Skill interface that Allegro software provides, carry out editing operation to this database, layer up according to the difference of circuit board signal line and its importance degree, combine the requirement of actual circuit board to carry out wiring and routing, avoid circuit crossing , when the line is held up, use this layered method as a reference to connect the line, so as to realize some functions that the program does not provide, improve the efficiency of Layout work, effectively solve the problem of line holding caused by too many flying lines, and facilitate the engineer to route the line Pre-planning saves time, improves work efficiency, and reduces unnecessary duplication of work.

Description of drawings

Fig. 1 is a schematic flow chart of judging the signal line category in the method of the present invention.

detailed description

A method for automatic layering of flying lines based on Allegro, PCB wiring through Allegro software, using the skill program of the Allegro software interface and forming automatic layering of flying lines according to the skill program: configure allegro.men in the menu bar of Allegro software The preset path of the file, add the corresponding command item to form the automatic layering of the flying line in the toolbar item, add the command code for forming the automatic layering of the flying line to the allegro.ilinit file under the skill file path, and it will form The flying line automatic layering file is placed under the skill file path to complete the command of forming the flying line automatic layering in the menu bar.

According to the above method and content of the invention, the present invention will be further described in conjunction with the accompanying drawings.

The invention provides an Allegro-based flying line automatic layering method, through the Skill program interface of the Allegro software, some extended operations other than the basic functions of the software can be realized, similar to third-party application development using the Allegro software as a platform.

Carry out PCB wiring through Allegro software, use the skill program of the Allegro software interface and form the automatic layering of flying lines according to the skill program, import the schematic diagram and structure diagram into Allegro according to the command items for forming automatic layering of flying lines, and set the layer , layering the flying lines;

Before setting up the layer, detect each signal line in the circuit board based on the schematic diagram, and judge the type of signal line: judge whether the signal line is a high-speed line, if so, continue to judge whether it is a data line, otherwise, perform surface connection Line, if it is further judged that it is a data line, it is set on the same layer, otherwise it may not be on the same layer, continue to judge whether the flying lines of the data line on the same layer cross, if so, change the layer, otherwise connect according to the flying line.

Among them, in the specific implementation, but not limited to the main skill program provided in the present invention:

Create a ALLEGRO Command and registers it. The rest of

; this SKILL code is a funtion which gets executed when

; the command 'runscript' is invoked.

; Requires the environment variable local_scriptpath to

; be set to the path where the scripts are stored.

axlCmdRegister("runscript" 'pmCreateScriptForm);

***************************************************** *********/

putd('pmCreateScriptForm nil)

(defun pmCreateScriptForm()

let( (ScriptForm)

***************************************************** *************/

putd('pmCreateformDefinitionFile nil)

(defun pmCreateformDefinitionFile()

let( (formDefinitionFile)

;---------------------------------------------- ------

; Create a temporary form definition file for the replay

; script files selection.

; NOTE we write to CWD else we might write the file

; to another directory in our Skill Path by mistake!!

;---------------------------------------------- ------

formDefinitionFile = outfile("./replay. form" "w")

;---------------------------------------------- ------

; Create form fields and write to form definition file

; only if file is writable.

;---------------------------------------------- ------

when( formDefinitionFile

fprintf(formDefinitionFile "FILE_TYPE=FORM_DEFN VERSION=2\n")

fprintf(formDefinitionFile "FORM\n"

fprintf(formDefinitionFile "HEADER \"Replay Script-Files V 1.0\"\n")

fprintf(formDefinitionFile "TILE\n")

fprintf(formDefinitionFile "TEXT \"Script (.scr)\"\n")

fprintf(formDefinitionFile "TLOC 2 1\n")

fprintf(formDefinitionFile "ENDTEXT\n")

fprintf(formDefinitionFile "FLOC 2 3\n")

fprintf(formDefinitionFile "LIST \"\" 40 5\n")

fprintf(formDefinitionFile "ENDFIELD\n")

fprintf(formDefinitionFile "FIELD close\n")

fprintf(formDefinitionFile "FLOC 2 13\n")

fprintf(formDefinitionFile "MENUBUTTON \"Close\" 10 3\n")

fprintf(formDefinitionFile "ENDFIELD\n")

fprintf(formDefinitionFile "ENDFORM\n")

close(formDefinitionFile)

);

);

); defun pmCreateformDefinitionFile

*********************************** Main Program *************/

;---------------------------------------------- ----

; Make sure the CWD is set in the Skill Search Path to

; enable the Form to work correctly. not set, add it

to the path

;---------------------------------------------- -----

if( car(getSkillPath()) != "./" && car(getSkillPath()) != "." then

axlUIWPrint(nil "** ERROR - Skill Path does not include the current working directory %s.%s **"

"(" ")")

axlUIWPrint(nil "** Setting Skill Path to include %s.%s - Please Correct! **" "(" ")")

setSkillPath(cons("." getSkillPath()))

); endif

;---------------------------------------------- ----

; Check if old form definition file is present. If found

; then remove it.

;---------------------------------------------- -----

if(isFile(strcat(car(getSkillPath()) "/replay. form")) then

deleteFile(strcat(car(getSkillPath()) "/replay.form"))

);endif

;---------------------------------------------- -----

; Create the ALLEGRO form definition file

;---------------------------------------------- -----

unless( pmCreateformDefinitionFile()

error("Could not create form definition file")

); unless

;---------------------------------------------- -----

; Display the Replay Script form

;---------------------------------------------- -----

ScriptForm = axlFormCreate( (gensym) "replay. form" nil 'pmCreateFormCallback t)

axlFormDisplay(ScriptForm)

;---------------------------------------------- -----

; Traverse searchpath and find all script files

;---------------------------------------------- ----

axlUIWPrint(nil "** Gathering scripts from %L, please wait. **" pmGetScriptPath() )

pmAddScriptsToForm(pmGetListOfScriptFiles(pmGetScriptPath() ".scr"))

axlUIWPrint(nil " - Done - " )

;---------------------------------------------- ------

; Clean up temp files - remove the reply.form file

;---------------------------------------------- ------

if(isFile(strcat(car(getSkillPath()) "/replay.form")) then

deleteFile(strcat(car(getSkillPath()) "/replay.form"))

);endif

);

); pmCreateScriptForm

The present invention utilizes the extended Skill interface provided by the Allegro software to edit the database, layer it according to the difference and importance of circuit board signal lines, and carry out wiring in combination with the requirements of the actual circuit board, so as to avoid line crossing and occurrence of suffocation. In the case of the line, use this hierarchical method as a reference to connect, so as to realize some functions that the program does not provide, and improve the efficiency of Layout work.

Claims (4)

1. A method for automatic layering of flying lines based on Allegro, PCB wiring is carried out through Allegro software, which is characterized in that the skill program of the Allegro software interface is used to form automatic layering of flying lines according to the skill program: in the menu bar of Allegro software Configure the preset path of the allegro.men file in the toolbar, add the corresponding command item to form the automatic layering of the flying line in the toolbar item, and add the command item for forming the automatic layering of the flying line to the allegro.ilinit file under the skill file path The command code is to put the file of forming automatic layering of flying lines under the path of the skill file, so as to execute the command of forming automatic layering of flying lines in the menu bar. 2. The method according to claim 1, characterized in that the schematic diagram and the structural diagram are imported into Allegro according to the command item forming the automatic layering of the flying wires, and the layers are set to layer the flying wires. 3. The method according to claim 2, characterized in that before the layer is set, each signal line in the circuit board is detected on the basis of the schematic diagram, the signal line category is judged, and the flying lines are checked for crossing. Line layering. 4. The method according to claim 3, wherein it is characterized in that each signal line in the circuit board is detected on the basis of the schematic diagram, and whether the signal line is judged to be a high-speed line, if so, continues to judge whether it is a data line, Otherwise, connect the surface layer. If it is further judged that it is a data line, set it on the same layer. Otherwise, it may not be on the same layer. Continue to judge whether the flying lines of the data line on the same layer cross. If so, change the layer, otherwise connect according to the flying line.