ocean script - corner list 

Hi there,

 When I plan to run several specific corner simulations as in following,

myCorner0='(tt,-40,1.5)

myCorner1= '(tt,125,1.4)

myCorner2= '(ff,-40,1.6)

I noticed "foreach" structure is sort of redundant way because obviously not necessary corners will be included much.

foreach(myMOS '("tt" "ff")

foreach(myTemp '("-40" "125")

foreach(myVdd '("1.4" "1.5" "1.6")

;;;code here

)))

So could you anybody suggest me how to construct efficient ocean script code? 

Thanks in advance.

There's a couple of ways you could achieve this. First with a list of lists:

foreach(corner '(("tt" -40 1.5) ("tt" 125 1.4) ("ff" -40 1.6))
  myMOS=car(corner)
  myTemp=cadr(corner)
  myVdd=caddr(corner)
  ...
)

Or another is to have a foreach with multiple loop variables:

foreach((myMOS myTemp myVdd) '("tt" "tt" "ff") '(-40 125 -40) '(1.5 1.4 1.6)
  ...
)

This will loop over each of the three lists in parallel.

Best Regards,

Andrew.

 Hello Andrew,

 What should be included in the corner list? 

myCors=list("fasthigh" "fastlow" )
foreach(CornersList myCors
modelFile(
    '("filepath/typicalmid.scs" "")
list("/filepath/cornerlist.txt")
)

cornerlist.txt is as follows

CornersVars= list ("process")

CornersList= list(

list("fastlow" )

list("fasthigh")

)

I get the error message: ERROR: "input.scs" 13: No section found witht name 'fasthigh' defined in file '/filepath/cornerlist.txt'.

Your question doesn't make sense (or at least doesn't contain enough information). I can't really see what you're doing with the list("/filepath/cornerlist.txt") line - that would treat that file as a spectre input file - which clearly it isn't.

Did you mean to do:

myCors=list("fasthigh" "fastlow")
foreach(corner myCors
  modelFile(
    list("/filepath/typicalmod.scs" corner)
  )
  ; etc
  run()
)

Andrew

 Hello Andrew,

I was trying to follow this example.

http://support.cadence.com/wps/myportal/cos/COSHome/viewsolution/!ut/p/c5/dY1JboMwAEXPwgEim8k2S8AMBokmKFDwBhlEKZMJNEVJTl9ygL6_fPp6gINjUux9J-79IsUECsBRpWqBq8YGtD7chEBGUBKnuQcPwOf7gSr4DzYEJeD47TVNJdAK_KsDmRuziGBdgzECuVy2-ShdQRE2C6aL3VGbXphZPLP66XR6GG6ZHaVTQBt5ShD5pQ6v2Zenbz-lj8V8NsxArKy0INepaKEhUh4Fq4nGvvYkHmP4GJJbdT6Zd62xBjzmr0fWLN-rd7F3f92Z20_tsHWKApJwmVtwG-XLJ7byB81SWQk!/dl3/d3/L2dBISEvZ0FBIS9nQSEh/

I'm trying to include different process corners and run it using ocean. 

I tried your example: 

myCors=list("fasthigh" "fastlow")
foreach(corner myCors
  modelFile(
    list("/filepath/typicalmid.scs" corner)
  )
  ; etc
  run()
)

I got this ERROR: "input.scs" 12: No section found with name `fastlow' defined in file

 Do i need to create a file to keep all the corner file together?

 the link doesnt seems to work. 

I copied the content from the link.

How to run parametric analysis over corners using Ocean in IC5141?

This approach will only work if you've got a section called "fastlow" in your model file - you need to check the model file and see what sections it has within the file (you'll see a "library" keyword and within that sections - assuming that the model file actually has sections at all).

The error message suggests that there's no "fastlow" section in the model file.

Andrew.

modelFile(
    '("xxx/typicalmid.scs" "")

model file path xxx/typicalmid.scs only have typicalmid corner

fastmid corner is in xxx/fastmid.scs

slowmid corner is in xxx/slowmid.scs

 I tried using

modelFile(
    '("xxx" ""))

 Fatal error occured: unable to open file "xxx"

in my case how should i run corner? 

How about:

foreach(corner '("typicalmid" "fastmid" "slowmid")
  modelFile(
    strcat("xxx/" corner ".scs")
  )
  ...
  run()
)

Andrew.