creating a netlist

In Allegro the File>Export>Netlist w/Properties... will generate ASCII netlist.txt, which is in the Allegro native 'Telesis' format

You can edit the netlist file & import it back into Allegro using the File>Import>Logic/Netlist... 'Other' tab

The netlist format is documented in 'Allegro® User Guide: Transferring Logic Design Data' chapter 'Creating, Comparing, and Updating Databases'

thank u for ur response, david.

i do understand the netlist format but it takes a half day to create a netlist from the netlist our customers send us.

our customers usually send us a netlist like the one we get on a symbol pin report as shown below.

from this symbol pin report, is there a skill or some easy method to create a netlist in the format that can be imported in the board design?

regards

masa

Are you working on a board or a package? The screenshot looks like a typical CSV netlist that you can import into a package design through APD+ and the file - import - netlist text in wizard. The format is similar to a CSV file for a die, package, or other component. 

Since many package designs are still done without a front end schematic for the logic, this is a popular format. For a board design, a schematic is almost always available, which is why the format isn’t utilized in that flow. 

if you’re bringing the netlist into a board design, the schematic tool you’re using in the front end may support reading this format. Where is it coming from out of your customer? Do they have other netlist formats available?

thank u for ur response, tyler.

i am working on apd and do not use schematic 

please let me try the netlist in wizard

it looks like the netlist in wizard takes txt files.

regards

masa

 masamasa 

it seem you same my work , do not use schematic and package only.

Let's talk together if you're having trouble

HoangKhoi.

Try opening the customer netlist file in Excel.

Then, manipulate the cells and save the spread sheet as a text file.

The final (text) format would look something like this:

VSS ; BGA.A3

VSS ; BGA.A4

I use Excel to convert a customer's placement file from English to Metric. 

The symbol pin report you showed appears to be created from within Allegro/APD, which is now HTML based so it's almost impossible to parse ( Thanks Cadance... )

Import the file into Excel as a comma separated file & then save as a csv file ( which is similar to the report -v spn file format )

Below is an example of running the skill code I wrote this morning to read the csv file to assign the nets:

skill load "csv_net_import.ils"
variable csv_net_import redefined
Autosave time limits are: 5 to 300 minutes
t
skill csv_net_import
Loaded existing device file 'C:\Temp\devices.dml'
Finished loading SigNoise device libraries
640 lines read, 563 net assignments made
t

The skill code is shown below:

procedure(csv_net_import()
let((FileName inport DataLine DataList RefDes PinTxt NetTxt Cmp Pin Net Status LineCnt Assigned)
(LineCnt = 0)
(Assigned = 0)
(FileName = axlDMFileBrowse( nil nil ?optFilters " files(*.csv)|*.csv|"))
if(( stringp(FileName) && (isFile(FileName) == t)) then
(inport = infile(FileName))
(axlClearSelSet)
while(gets(DataLine inport)
(LineCnt++)
(DataList=parseString(DataLine ",\n\r"))
(RefDes = car(DataList))
(PinTxt = cadr(DataList))
;(Net = cadr(Reverse(DataList)))
(NetTxt = nth(7 DataList))
when(RefDes && PinTxt && NetTxt
(Cmp = car(axlSelectByName("COMPONENT" RefDes)))
when(Cmp
(Pin = car(axlSelectByName("PIN" (strcat RefDes "." PinTxt))))
when(Pin
(Net = axlDBCreateNet(NetTxt))
(Status = axlDBAssignNet(Pin Net nil t))
when(Status
(Assigned++)
)
)
)
)
(axlClearSelSet)
)
close(inport)
drain()
axlMsgPut("%d lines read, %d net assignments made" LineCnt Assigned)
else
axlMsgPut("No valid file selected")
)
)
)

The symbol pin report you showed appears to be created from within Allegro/APD, which is now HTML based so it's almost impossible to parse ( Thanks Cadance... )

Import the file into Excel as a comma separated file & then save as a csv file ( which is similar to the report -v spn file format )

Below is an example of running the skill code I wrote this morning to read the csv file to assign the nets:

skill load "csv_net_import.ils"
variable csv_net_import redefined
Autosave time limits are: 5 to 300 minutes
t
skill csv_net_import
Loaded existing device file 'C:\Temp\devices.dml'
Finished loading SigNoise device libraries
640 lines read, 563 net assignments made
t

The skill code is shown below:

procedure(csv_net_import()
let((FileName inport DataLine DataList RefDes PinTxt NetTxt Cmp Pin Net Status LineCnt Assigned)
(LineCnt = 0)
(Assigned = 0)
(FileName = axlDMFileBrowse( nil nil ?optFilters " files(*.csv)|*.csv|"))
if(( stringp(FileName) && (isFile(FileName) == t)) then
(inport = infile(FileName))
(axlClearSelSet)
while(gets(DataLine inport)
(LineCnt++)
(DataList=parseString(DataLine ",\n\r"))
(RefDes = car(DataList))
(PinTxt = cadr(DataList))
;(Net = cadr(Reverse(DataList)))
(NetTxt = nth(7 DataList))
when(RefDes && PinTxt && NetTxt
(Cmp = car(axlSelectByName("COMPONENT" RefDes)))
when(Cmp
(Pin = car(axlSelectByName("PIN" (strcat RefDes "." PinTxt))))
when(Pin
(Net = axlDBCreateNet(NetTxt))
(Status = axlDBAssignNet(Pin Net nil t))
when(Status
(Assigned++)
)
)
)
)
(axlClearSelSet)
)
close(inport)
drain()
axlMsgPut("%d lines read, %d net assignments made" LineCnt Assigned)
else
axlMsgPut("No valid file selected")
)
)
)

thank u for ur skill code, david.

i have tried this and got this message.  is it automatically assign the net to the pin without importing the netlist?

the command line says 34387 lines read, 34386 net assignments made.

the total pin count is 34387 on the symbols and on the csv files as well.

after excuting the skill code, the symbol pin report has 34387 pins.

i wonder why 1 pin is missing for the net assignment.

i reduced the net count to 4 and excuted the code and still one net less than the line count in the result on the command line. 

it took me about an hour to excute this code for the 34387 pins..  if this works, it would be a great time saver compared with spending a half day to create a netlist from scratch.

regards

masa

If you run the code & cancel out of the file browser you will get the message "No valid file selected"

If your input file has any lines where the Refdes, Pin_number or Net_name are empty, that line will be reported as an error and skipped

I added some error reporting to the skill code, latest version included below:

procedure(csv_net_import()
let((FileName inport DataLine DataList RefDes PinTxt NetTxt Cmp Pin Net Status LineCnt Assigned ErrorCnt)
(LineCnt = 0)
(ErrorCnt = 0)
(Assigned = 0)
(FileName = axlDMFileBrowse( nil nil ?optFilters " files(*.csv)|*.csv|"))
if(( stringp(FileName) && (isFile(FileName) == t)) then
(inport = infile(FileName))
(axlClearSelSet)
while(gets(DataLine inport)
(LineCnt++)
(DataList=parseString(DataLine ",\n\r"))
(RefDes = car(DataList))
(PinTxt = cadr(DataList))
;(Net = cadr(Reverse(DataList)))
(NetTxt = nth(7 DataList))
;axlMsgPut(" RefDes %s PinTxt %s NetTxt %s" RefDes PinTxt NetTxt)
;when(plusp(strlen(RefDes)) && plusp(strlen(PinTxt)) && plusp(strlen(NetTxt))
if( RefDes && PinTxt && NetTxt then
(Cmp = car(axlSelectByName("COMPONENT" RefDes)))
when(Cmp
(Pin = car(axlSelectByName("PIN" (strcat RefDes "." PinTxt))))
when(Pin
(Net = axlDBCreateNet(NetTxt))
(Status = axlDBAssignNet(Pin Net nil t))
if(Status then
(Assigned++)
else
axlMsgPut("Error: line # %d generated no connectivity: %s" LineCnt DataLine)
(ErrorCnt++)
)
)
)
else
axlMsgPut("Error: line # %d has formatting issues: %s" LineCnt DataLine)
(ErrorCnt++)
)
(axlClearSelSet)
)
close(inport)
drain()
axlMsgPut("%d lines read, %d net assignments made, %d errors found" LineCnt Assigned ErrorCnt)
else
axlMsgPut("No valid file selected")
)
)
)

thank u david for creating the skill code.

i am sorry for delaying my response as we had a week long holiday in japan.

 i was able to import all 4 nets by using the skill code

the first row was missing so i added the first row and it works now.

regards

masa

I duplicated your design data  to test the skill code:

C:\Temp>
C:\Temp>cat test.csv
BGA,A3,BGA,BGA,BGA_PAD,27000,-29000,VSS
BGA,A4,BGA,BGA,BGA_PAD,26000,-29000,VSS
DIE,30469,DIE_NEW,DIE_NEW,FC_PAD,23315,-14115,NC
DIE,30470,DIE_NEW,DIE_NEW,FC_PAD,23315,-14315,NC

C:\Temp>wc test.csv
  4   4 182 test.csv

C:\Temp>

I did not have any issues loading the netlist...

C:\Temp>tail allegro.jrl
\t (00:20:45) Autosave successful
\w (00:20:45) Autosave time limits are: 5 to 300 minutes
\i (00:20:59) skill csv_net_import
\i (00:21:03) fillin "test.csv"
\t (00:21:03) 4 lines read, 4 net assignments made, 0 errors found
   (00:21:03) t
\i (00:22:42) save
\i (00:22:42) generaledit
\i (00:22:47) exit
\t (00:22:47)     Journal end - Mon Aug 19 09:27:29 2024

C:\Temp>

Are you using the latest skill code I posted 10 days ago?

thank u for ur response, david.  i really appreviate it.

yes i used ur latest skill code posted 10 days ago.

with the first tow, i get this.

this works fine as all 4 nets r imported.

but without the first row, i get this.

one last net is not imported.

this is weird.  maybe it is because i use apd so the format may be slightly different. 

regards

masa